From patchwork Mon Jan 8 06:49:30 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Chen Wang X-Patchwork-Id: 13513039 Received: from mail-oa1-f49.google.com (mail-oa1-f49.google.com [209.85.160.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7EE4ABE7F; Mon, 8 Jan 2024 06:49:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="C8Iu05Uc" Received: by mail-oa1-f49.google.com with SMTP id 586e51a60fabf-2044d093b3fso1413097fac.3; Sun, 07 Jan 2024 22:49:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1704696581; x=1705301381; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=gvra0UD4QgXPmAZdAtseEBAwRKQcVQTsg0Iqx1M/Lp0=; b=C8Iu05UcTDz7fCYBwVzKBVVH4nXVMBOS47w0EdDg8NlWCJ/wqel6jagpGwV2XzFovw LWkBufhujYtJ66BBc7CnOpQPuvgIxcjaqM2qF62Ekrsoj/BOzEIJUEpMA46BqpHjJ1Ku u2AFs3kUzxDbpzqIFX7UyewOc8iD2B0oF9mAm1uKsDf7csEK4AgfzFNMhG9rUuRoHygL jQRWu4MqUj6RVoDTPtz1BnJglwFn55Ot1lXvoeFcUPM46sC71zNL6/04iUxuMwJOxwME ifDn7P60F6kcNCGn31mo4ctx2dFN6rez/M5eUjxpHcLHuuPBGEZfLshcmMpgaY53115N 1yQw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1704696581; x=1705301381; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=gvra0UD4QgXPmAZdAtseEBAwRKQcVQTsg0Iqx1M/Lp0=; b=O5rPjbOW2KA7GI4J7sfwV2ffD7MTdjcjhHFPVk2umxx/ueaiZCKkQHMRVt3TS5dTSi S9quhHdp2tmOPD1h+V4daWKMFDzMwJ6QR6XFfYbjkdykB8hERVKoILyOubVG3iNpCAa3 MREU0JfbVFY8k/noDzuQhxUjrd5WZoortYW31U3YcB6R8Ou76FhPzZ0GQdER6FTba371 +keezYqMnUyZYHlLtB4hBlaSYagoFqExXyzxQoUzl6Mm2b1bsbR+KK1EdUHrvkYXcwxB Tp0/xQTtVrMnSPlZgkm9jKsxSkHZcDMX+URi/c8hOrw6UfHFCWHH5AtWdh4qPJUYUv8F FgKA== X-Gm-Message-State: AOJu0YySdLYnTxsCQg1MYrhubg7TZ9jOwsS3wIEAoOefhKJ2Oqq6XFRy Vmmd0Dthti1/ddAd7bFTAK4= X-Google-Smtp-Source: AGHT+IEYzVPD29UfrPmSaxXru4DMsGTqnFXpmOY33+MbwFH1Ywhr3HI1zXMg518Y9As7X6Sz5ac49g== X-Received: by 2002:a05:6871:5d0:b0:1fb:e34:e31c with SMTP id v16-20020a05687105d000b001fb0e34e31cmr4641458oan.37.1704696581119; Sun, 07 Jan 2024 22:49:41 -0800 (PST) Received: from localhost.localdomain ([122.8.183.87]) by smtp.gmail.com with ESMTPSA id sn13-20020a056871810d00b00205da57c211sm1625332oab.38.2024.01.07.22.49.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 07 Jan 2024 22:49:40 -0800 (PST) From: Chen Wang To: aou@eecs.berkeley.edu, chao.wei@sophgo.com, conor@kernel.org, krzysztof.kozlowski+dt@linaro.org, mturquette@baylibre.com, palmer@dabbelt.com, paul.walmsley@sifive.com, richardcochran@gmail.com, robh+dt@kernel.org, sboyd@kernel.org, devicetree@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, haijiao.liu@sophgo.com, xiaoguang.xing@sophgo.com, guoren@kernel.org, jszhang@kernel.org, inochiama@outlook.com, samuel.holland@sifive.com Cc: Chen Wang Subject: [PATCH v7 3/4] clk: sophgo: Add SG2042 clock generator driver Date: Mon, 8 Jan 2024 14:49:30 +0800 Message-Id: X-Mailer: git-send-email 2.34.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-clk@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Chen Wang Add a driver for the SOPHGO SG2042 clock generator. Signed-off-by: Chen Wang --- MAINTAINERS | 7 + drivers/clk/Kconfig | 1 + drivers/clk/Makefile | 1 + drivers/clk/sophgo/Kconfig | 8 + drivers/clk/sophgo/Makefile | 2 + drivers/clk/sophgo/clk-sophgo-sg2042.c | 1316 ++++++++++++++++++++++++ drivers/clk/sophgo/clk-sophgo-sg2042.h | 236 +++++ 7 files changed, 1571 insertions(+) create mode 100644 drivers/clk/sophgo/Kconfig create mode 100644 drivers/clk/sophgo/Makefile create mode 100644 drivers/clk/sophgo/clk-sophgo-sg2042.c create mode 100644 drivers/clk/sophgo/clk-sophgo-sg2042.h diff --git a/MAINTAINERS b/MAINTAINERS index a7c4cf8201e0..6b5019ba0794 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -20197,6 +20197,13 @@ S: Maintained F: arch/riscv/boot/dts/sophgo/ F: Documentation/devicetree/bindings/riscv/sophgo.yaml +SOPHGO CLOCK DRIVER +M: Chen Wang +S: Maintained +F: Documentation/devicetree/bindings/clock/sophgo/ +F: drivers/clk/sophgo/ +F: include/dt-bindings/clock/sophgo,sg2042-clkgen.h + SOUND M: Jaroslav Kysela M: Takashi Iwai diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index c30d0d396f7a..514343934fda 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -499,6 +499,7 @@ source "drivers/clk/rockchip/Kconfig" source "drivers/clk/samsung/Kconfig" source "drivers/clk/sifive/Kconfig" source "drivers/clk/socfpga/Kconfig" +source "drivers/clk/sophgo/Kconfig" source "drivers/clk/sprd/Kconfig" source "drivers/clk/starfive/Kconfig" source "drivers/clk/sunxi/Kconfig" diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index ed71f2e0ee36..eeae7ae93f89 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -119,6 +119,7 @@ obj-$(CONFIG_ARCH_ROCKCHIP) += rockchip/ obj-$(CONFIG_COMMON_CLK_SAMSUNG) += samsung/ obj-$(CONFIG_CLK_SIFIVE) += sifive/ obj-y += socfpga/ +obj-y += sophgo/ obj-$(CONFIG_PLAT_SPEAR) += spear/ obj-y += sprd/ obj-$(CONFIG_ARCH_STI) += st/ diff --git a/drivers/clk/sophgo/Kconfig b/drivers/clk/sophgo/Kconfig new file mode 100644 index 000000000000..feab0b805a29 --- /dev/null +++ b/drivers/clk/sophgo/Kconfig @@ -0,0 +1,8 @@ +# SPDX-License-Identifier: GPL-2.0 + +config CLK_SOPHGO_SG2042 + bool "Sophgo SG2042 clock support" + depends on ARCH_SOPHGO || COMPILE_TEST + default y + help + Say yes here to support the clock controller on the Sophgo SG2042 SoC. diff --git a/drivers/clk/sophgo/Makefile b/drivers/clk/sophgo/Makefile new file mode 100644 index 000000000000..13834cce260c --- /dev/null +++ b/drivers/clk/sophgo/Makefile @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_CLK_SOPHGO_SG2042) += clk-sophgo-sg2042.o diff --git a/drivers/clk/sophgo/clk-sophgo-sg2042.c b/drivers/clk/sophgo/clk-sophgo-sg2042.c new file mode 100644 index 000000000000..92d5c68f4302 --- /dev/null +++ b/drivers/clk/sophgo/clk-sophgo-sg2042.c @@ -0,0 +1,1316 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Sophgo SG2042 Clock Generator Driver + * + * Copyright (C) 2023 Sophgo Technology Inc. All rights reserved. + */ + +#include +#include +#include +#include +#include + +#include + +#include "clk-sophgo-sg2042.h" + +#define KHZ 1000UL +#define MHZ (KHZ * KHZ) + +#define REFDIV_MIN 1 +#define REFDIV_MAX 63 +#define FBDIV_MIN 16 +#define FBDIV_MAX 320 + +#define PLL_FREF_SG2042 (25 * MHZ) + +#define PLL_FOUTPOSTDIV_MIN (16 * MHZ) +#define PLL_FOUTPOSTDIV_MAX (3200 * MHZ) + +#define PLL_FOUTVCO_MIN (800 * MHZ) +#define PLL_FOUTVCO_MAX (3200 * MHZ) + +struct sg2042_pll_ctrl { + unsigned long freq; + unsigned int fbdiv; + unsigned int postdiv1; + unsigned int postdiv2; + unsigned int refdiv; +}; + +#define PLLCTRL_FBDIV_SHIFT 16 +#define PLLCTRL_FBDIV_MASK (GENMASK(27, 16) >> PLLCTRL_FBDIV_SHIFT) +#define PLLCTRL_POSTDIV2_SHIFT 12 +#define PLLCTRL_POSTDIV2_MASK (GENMASK(14, 12) >> PLLCTRL_POSTDIV2_SHIFT) +#define PLLCTRL_POSTDIV1_SHIFT 8 +#define PLLCTRL_POSTDIV1_MASK (GENMASK(10, 8) >> PLLCTRL_POSTDIV1_SHIFT) +#define PLLCTRL_REFDIV_SHIFT 0 +#define PLLCTRL_REFDIV_MASK (GENMASK(5, 0) >> PLLCTRL_REFDIV_SHIFT) + +static inline u32 sg2042_pll_ctrl_encode(struct sg2042_pll_ctrl *ctrl) +{ + return (((ctrl->fbdiv & PLLCTRL_FBDIV_MASK) << PLLCTRL_FBDIV_SHIFT) | + ((ctrl->postdiv2 & PLLCTRL_POSTDIV2_MASK) << PLLCTRL_POSTDIV2_SHIFT) | + ((ctrl->postdiv1 & PLLCTRL_POSTDIV1_MASK) << PLLCTRL_POSTDIV1_SHIFT) | + ((ctrl->refdiv & PLLCTRL_REFDIV_MASK) << PLLCTRL_REFDIV_SHIFT)); +} + +static inline void sg2042_pll_ctrl_decode(unsigned int reg_value, + struct sg2042_pll_ctrl *ctrl) +{ + ctrl->fbdiv = (reg_value >> PLLCTRL_FBDIV_SHIFT) & PLLCTRL_FBDIV_MASK; + ctrl->refdiv = (reg_value >> PLLCTRL_REFDIV_SHIFT) & PLLCTRL_REFDIV_MASK; + ctrl->postdiv1 = (reg_value >> PLLCTRL_POSTDIV1_SHIFT) & PLLCTRL_POSTDIV1_MASK; + ctrl->postdiv2 = (reg_value >> PLLCTRL_POSTDIV2_SHIFT) & PLLCTRL_POSTDIV2_MASK; +} + +static inline int sg2042_pll_enable(struct sg2042_pll_clock *pll, bool en) +{ + unsigned int value = 0; + struct regmap *map = pll->map; + + if (en) { + /* wait pll lock */ + if (regmap_read_poll_timeout_atomic(map, + pll->offset_status, + value, + ((value >> pll->shift_status_lock) & 0x1), + 0, + 100000)) + pr_warn("%s not locked\n", pll->name); + + /* wait pll updating */ + if (regmap_read_poll_timeout_atomic(map, + pll->offset_status, + value, + !((value >> pll->shift_status_updating) & 0x1), + 0, + 100000)) + pr_warn("%s still updating\n", pll->name); + + /* enable pll */ + regmap_read(map, pll->offset_enable, &value); + regmap_write(map, pll->offset_enable, value | (1 << pll->shift_enable)); + } else { + /* disable pll */ + regmap_read(map, pll->offset_enable, &value); + regmap_write(map, pll->offset_enable, value & (~(1 << pll->shift_enable))); + } + + return 0; +} + +/* + * @reg_value: current register value + * @parent_rate: parent frequency + * + * This function is used to calculate below "rate" in equation + * rate = (parent_rate/REFDIV) x FBDIV/POSTDIV1/POSTDIV2 + * = (parent_rate x FBDIV) / (REFDIV x POSTDIV1 x POSTDIV2) + */ +static unsigned long sg2042_pll_recalc_rate(unsigned int reg_value, + unsigned long parent_rate) +{ + struct sg2042_pll_ctrl ctrl_table; + u64 rate, numerator, denominator; + + sg2042_pll_ctrl_decode(reg_value, &ctrl_table); + + numerator = parent_rate * ctrl_table.fbdiv; + denominator = ctrl_table.refdiv * ctrl_table.postdiv1 * ctrl_table.postdiv2; + do_div(numerator, denominator); + rate = numerator; + + return rate; +} + +/* + * Below array is the total combination lists of POSTDIV1 and POSTDIV2 + * for example: + * postdiv1_2[0] = {2, 4, 8} + * ==> div1 = 2, div2 = 4 , div1 * div2 = 8 + * And POSTDIV_RESULT_INDEX point to 3rd element in the array + */ +#define POSTDIV_RESULT_INDEX 2 +static int postdiv1_2[][3] = { + {2, 4, 8}, {3, 3, 9}, {2, 5, 10}, {2, 6, 12}, + {2, 7, 14}, {3, 5, 15}, {4, 4, 16}, {3, 6, 18}, + {4, 5, 20}, {3, 7, 21}, {4, 6, 24}, {5, 5, 25}, + {4, 7, 28}, {5, 6, 30}, {5, 7, 35}, {6, 6, 36}, + {6, 7, 42}, {7, 7, 49} +}; + +/* + * Based on input rate/prate/fbdiv/refdiv, look up the postdiv1_2 table + * to get the closest postdiiv combination. + * @rate: FOUTPOSTDIV + * @prate: parent rate, i.e. FREF + * @fbdiv: FBDIV + * @refdiv: REFDIV + * @postdiv1: POSTDIV1, output + * @postdiv2: POSTDIV2, output + * See TRM: + * FOUTPOSTDIV = FREF * FBDIV / REFDIV / (POSTDIV1 * POSTDIV2) + * So we get following formula to get POSTDIV1 and POSTDIV2: + * POSTDIV = (prate/REFDIV) x FBDIV/rate + * above POSTDIV = POSTDIV1*POSTDIV2 + */ +static int sg2042_pll_get_postdiv_1_2(unsigned long rate, + unsigned long prate, + unsigned int fbdiv, + unsigned int refdiv, + unsigned int *postdiv1, + unsigned int *postdiv2) +{ + int index = 0; + u64 tmp0; + + /* prate/REFDIV and result save to tmp0 */ + tmp0 = prate; + do_div(tmp0, refdiv); + + /* ((prate/REFDIV) x FBDIV) and result save to tmp0 */ + tmp0 *= fbdiv; + + /* ((prate/REFDIV) x FBDIV)/rate and result save to tmp0 */ + do_div(tmp0, rate); + + /* tmp0 is POSTDIV1*POSTDIV2, now we calculate div1 and div2 value */ + if (tmp0 <= 7) { + /* (div1 * div2) <= 7, no need to use array search */ + *postdiv1 = tmp0; + *postdiv2 = 1; + return 0; + } + + /* (div1 * div2) > 7, use array search */ + for (index = 0; index < ARRAY_SIZE(postdiv1_2); index++) { + if (tmp0 > postdiv1_2[index][POSTDIV_RESULT_INDEX]) { + continue; + } else { + /* found it */ + *postdiv1 = postdiv1_2[index][1]; + *postdiv2 = postdiv1_2[index][0]; + return 0; + } + } + pr_warn("%s can not find in postdiv array!\n", __func__); + return -EINVAL; +} + +/* + * Based on the given FOUTPISTDIV and the input FREF to calculate + * the REFDIV/FBDIV/PSTDIV1/POSTDIV2 combination for pllctrl register. + * @req_rate: expected output clock rate, i.e. FOUTPISTDIV + * @parent_rate: input parent clock rate, i.e. FREF + * @best: output to hold calculated combination of REFDIV/FBDIV/PSTDIV1/POSTDIV2 + */ +static int sg2042_get_pll_ctl_setting(struct sg2042_pll_ctrl *best, + unsigned long req_rate, + unsigned long parent_rate) +{ + int ret; + unsigned int fbdiv, refdiv, postdiv1, postdiv2; + unsigned long foutpostdiv; + u64 tmp; + u64 foutvco; + + if (parent_rate != PLL_FREF_SG2042) { + pr_alert("INVALID FREF: %ld\n", parent_rate); + return -EINVAL; + } + + if (req_rate < PLL_FOUTPOSTDIV_MIN || req_rate > PLL_FOUTPOSTDIV_MAX) { + pr_alert("INVALID FOUTPOSTDIV: %ld\n", req_rate); + return -EINVAL; + } + + memset(best, 0, sizeof(struct sg2042_pll_ctrl)); + + for (refdiv = REFDIV_MIN; refdiv < REFDIV_MAX + 1; refdiv++) { + /* required by hardware: FREF/REFDIV must > 10 */ + tmp = parent_rate; + do_div(tmp, refdiv); + if (tmp <= 10) + continue; + + for (fbdiv = FBDIV_MIN; fbdiv < FBDIV_MAX + 1; fbdiv++) { + /* + * FOUTVCO = FREF*FBDIV/REFDIV validation + * required by hardware, FOUTVCO must [800MHz, 3200MHz] + */ + foutvco = parent_rate * fbdiv; + do_div(foutvco, refdiv); + if (foutvco < PLL_FOUTVCO_MIN || foutvco > PLL_FOUTVCO_MAX) + continue; + + ret = sg2042_pll_get_postdiv_1_2(req_rate, parent_rate, + fbdiv, refdiv, + &postdiv1, &postdiv2); + if (ret) + continue; + + /* + * FOUTPOSTDIV = FREF*FBDIV/REFDIV/(POSTDIV1*POSTDIV2) + * = FOUTVCO/(POSTDIV1*POSTDIV2) + */ + tmp = foutvco; + do_div(tmp, (postdiv1 * postdiv2)); + foutpostdiv = (unsigned long)tmp; + /* Iterative to approach the expected value */ + if (abs_diff(foutpostdiv, req_rate) < + abs_diff(best->freq, req_rate)) { + best->freq = foutpostdiv; + best->refdiv = refdiv; + best->fbdiv = fbdiv; + best->postdiv1 = postdiv1; + best->postdiv2 = postdiv2; + if (foutpostdiv == req_rate) + return 0; + } + continue; + } + } + + if (best->freq == 0) + return -EINVAL; + else + return 0; +} + +/* + * @hw: ccf use to hook get sg2042_pll_clock + * @parent_rate: parent rate + * + * The is function will be called through clk_get_rate + * and return current rate after decoding reg value + */ +static unsigned long sg2042_clk_pll_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + unsigned int value; + unsigned long rate; + struct sg2042_pll_clock *pll = to_sg2042_pll_clk(hw); + + regmap_read(pll->map, pll->offset_ctrl, &value); + rate = sg2042_pll_recalc_rate(value, parent_rate); + + pr_debug("--> %s: pll_recalc_rate: val = %ld\n", + clk_hw_get_name(hw), rate); + return rate; +} + +static long sg2042_clk_pll_round_rate(struct clk_hw *hw, + unsigned long req_rate, + unsigned long *prate) +{ + unsigned int value; + struct sg2042_pll_ctrl pctrl_table; + long proper_rate; + int ret; + + ret = sg2042_get_pll_ctl_setting(&pctrl_table, req_rate, *prate); + if (ret) { + proper_rate = 0; + goto out; + } + + value = sg2042_pll_ctrl_encode(&pctrl_table); + proper_rate = (long)sg2042_pll_recalc_rate(value, *prate); + +out: + pr_debug("--> %s: pll_round_rate: val = %ld\n", + clk_hw_get_name(hw), proper_rate); + return proper_rate; +} + +static int sg2042_clk_pll_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + req->rate = sg2042_clk_pll_round_rate(hw, min(req->rate, req->max_rate), + &req->best_parent_rate); + pr_debug("--> %s: pll_determine_rate: val = %ld\n", + clk_hw_get_name(hw), req->rate); + return 0; +} + +static int sg2042_clk_pll_set_rate(struct clk_hw *hw, + unsigned long rate, + unsigned long parent_rate) +{ + unsigned long flags; + unsigned int value; + int ret = 0; + struct sg2042_pll_ctrl pctrl_table; + struct sg2042_pll_clock *pll = to_sg2042_pll_clk(hw); + + spin_lock_irqsave(pll->lock, flags); + if (sg2042_pll_enable(pll, 0)) { + pr_warn("Can't disable pll(%s), status error\n", pll->name); + goto out; + } + ret = sg2042_get_pll_ctl_setting(&pctrl_table, rate, parent_rate); + if (ret) { + pr_warn("%s: Can't find a proper pll setting\n", pll->name); + goto out2; + } + + value = sg2042_pll_ctrl_encode(&pctrl_table); + + /* write the value to top register */ + regmap_write(pll->map, pll->offset_ctrl, value); + +out2: + sg2042_pll_enable(pll, 1); +out: + spin_unlock_irqrestore(pll->lock, flags); + + pr_debug("--> %s: pll_set_rate: val = 0x%x\n", + clk_hw_get_name(hw), value); + return ret; +} + +static const struct clk_ops sg2042_clk_pll_ops = { + .recalc_rate = sg2042_clk_pll_recalc_rate, + .round_rate = sg2042_clk_pll_round_rate, + .determine_rate = sg2042_clk_pll_determine_rate, + .set_rate = sg2042_clk_pll_set_rate, +}; + +static const struct clk_ops sg2042_clk_pll_ro_ops = { + .recalc_rate = sg2042_clk_pll_recalc_rate, + .round_rate = sg2042_clk_pll_round_rate, +}; + +#define DIV_MASK(width) GENMASK(((width) - 1), 0) + +static unsigned long sg2042_clk_divider_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct sg2042_divider_clock *divider = to_sg2042_clk_divider(hw); + unsigned int val; + unsigned long ret_rate; + + if (!(readl(divider->reg) & BIT(3))) { + val = (int)(divider->initval); + } else { + val = readl(divider->reg) >> divider->shift; + val &= DIV_MASK(divider->width); + } + + ret_rate = divider_recalc_rate(hw, parent_rate, val, NULL, + divider->div_flags, divider->width); + + pr_debug("--> %s: divider_recalc_rate: ret_rate = %ld\n", + clk_hw_get_name(hw), ret_rate); + return ret_rate; +} + +static long sg2042_clk_divider_round_rate(struct clk_hw *hw, + unsigned long rate, + unsigned long *prate) +{ + int bestdiv; + unsigned long ret_rate; + struct sg2042_divider_clock *divider = to_sg2042_clk_divider(hw); + + /* if read only, just return current value */ + if (divider->div_flags & CLK_DIVIDER_READ_ONLY) { + if (!(readl(divider->reg) & BIT(3))) { + bestdiv = (int)(divider->initval); + } else { + bestdiv = readl(divider->reg) >> divider->shift; + bestdiv &= DIV_MASK(divider->width); + } + ret_rate = DIV_ROUND_UP_ULL((u64)*prate, bestdiv); + } else { + ret_rate = divider_round_rate(hw, rate, prate, NULL, + divider->width, divider->div_flags); + } + + pr_debug("--> %s: divider_round_rate: val = %ld\n", + clk_hw_get_name(hw), ret_rate); + return ret_rate; +} + +static int sg2042_clk_divider_set_rate(struct clk_hw *hw, + unsigned long rate, + unsigned long parent_rate) +{ + unsigned int value; + unsigned int val, val2; + unsigned long flags = 0; + struct sg2042_divider_clock *divider = to_sg2042_clk_divider(hw); + + value = divider_get_val(rate, parent_rate, NULL, + divider->width, divider->div_flags); + + if (divider->lock) + spin_lock_irqsave(divider->lock, flags); + else + __acquire(divider->lock); + + /* + * The sequence of clock frequency modification is: + * Assert to reset divider. + * Modify the value of Clock Divide Factor (and High Wide if needed). + * De-assert to restore divided clock with new frequency. + */ + val = readl(divider->reg); + + /* assert */ + val &= ~0x1; + writel(val, divider->reg); + + if (divider->div_flags & CLK_DIVIDER_HIWORD_MASK) { + val = DIV_MASK(divider->width) << (divider->shift + 16); + } else { + val = readl(divider->reg); + val &= ~(DIV_MASK(divider->width) << divider->shift); + } + val |= value << divider->shift; + val |= 1 << 3; + writel(val, divider->reg); + val2 = val; + + /* de-assert */ + val |= 1; + writel(val, divider->reg); + + if (divider->lock) + spin_unlock_irqrestore(divider->lock, flags); + else + __release(divider->lock); + + pr_debug("--> %s: divider_set_rate: register val = 0x%x\n", + clk_hw_get_name(hw), val2); + return 0; +} + +static const struct clk_ops sg2042_clk_divider_ops = { + .recalc_rate = sg2042_clk_divider_recalc_rate, + .round_rate = sg2042_clk_divider_round_rate, + .set_rate = sg2042_clk_divider_set_rate, +}; + +static const struct clk_ops sg2042_clk_divider_ro_ops = { + .recalc_rate = sg2042_clk_divider_recalc_rate, + .round_rate = sg2042_clk_divider_round_rate, +}; + +#define SG2042_PLL(_id, _name, _parent_name, _r_stat, _r_enable, _r_ctrl, _shift) \ + { \ + .hw.init = CLK_HW_INIT_PARENTS( \ + _name, \ + (const char *[]){_parent_name}, \ + &sg2042_clk_pll_ops, \ + CLK_GET_RATE_NOCACHE | CLK_GET_ACCURACY_NOCACHE),\ + .id = _id, \ + .name = _name, \ + .offset_ctrl = _r_ctrl, \ + .offset_status = _r_stat, \ + .offset_enable = _r_enable, \ + .shift_status_lock = 8 + (_shift), \ + .shift_status_updating = _shift, \ + .shift_enable = _shift, \ + } + +#define SG2042_PLL_RO(_id, _name, _parent_name, _r_stat, _r_enable, _r_ctrl, _shift) \ + { \ + .hw.init = CLK_HW_INIT_PARENTS( \ + _name, \ + (const char *[]){_parent_name}, \ + &sg2042_clk_pll_ro_ops, \ + CLK_GET_RATE_NOCACHE | CLK_GET_ACCURACY_NOCACHE),\ + .id = _id, \ + .name = _name, \ + .offset_ctrl = _r_ctrl, \ + .offset_status = _r_stat, \ + .offset_enable = _r_enable, \ + .shift_status_lock = 8 + (_shift), \ + .shift_status_updating = _shift, \ + .shift_enable = _shift, \ + } + +static struct sg2042_pll_clock sg2042_pll_clks[] = { + SG2042_PLL_RO(FPLL_CLK, "fpll_clock", "cgi", + R_PLL_STAT, R_PLL_CLKEN_CONTROL, R_FPLL_CONTROL, 3), + SG2042_PLL_RO(DPLL0_CLK, "dpll0_clock", "cgi", + R_PLL_STAT, R_PLL_CLKEN_CONTROL, R_DPLL0_CONTROL, 4), + SG2042_PLL_RO(DPLL1_CLK, "dpll1_clock", "cgi", + R_PLL_STAT, R_PLL_CLKEN_CONTROL, R_DPLL1_CONTROL, 5), + SG2042_PLL(MPLL_CLK, "mpll_clock", "cgi", + R_PLL_STAT, R_PLL_CLKEN_CONTROL, R_MPLL_CONTROL, 0), +}; + +#define SG2042_DIV(_id, _name, _parent_name, \ + _r_ctrl, _shift, _width, \ + _div_flag, _initval) { \ + .hw.init = CLK_HW_INIT_PARENTS( \ + _name, \ + (const char *[]){_parent_name}, \ + &sg2042_clk_divider_ops, \ + 0), \ + .id = _id, \ + .name = _name, \ + .offset_ctrl = _r_ctrl, \ + .shift = _shift, \ + .width = _width, \ + .div_flags = _div_flag, \ + .initval = _initval, \ + } + +#define SG2042_DIV_RO(_id, _name, _parent_name, \ + _r_ctrl, _shift, _width, \ + _div_flag, _initval) { \ + .hw.init = CLK_HW_INIT_PARENTS( \ + _name, \ + (const char *[]){_parent_name}, \ + &sg2042_clk_divider_ro_ops, \ + 0), \ + .id = _id, \ + .name = _name, \ + .offset_ctrl = _r_ctrl, \ + .shift = _shift, \ + .width = _width, \ + .div_flags = (_div_flag) | CLK_DIVIDER_READ_ONLY, \ + .initval = _initval, \ + } + +/* + * DIV items in the array are sorted according to the clock-tree diagram, + * from top to bottom, from upstream to downstream. Read TRM for details. + */ +#define DEF_DIVFLAG (CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO) +static struct sg2042_divider_clock sg2042_div_clks[] = { + SG2042_DIV_RO(DIV_CLK_DPLL0_DDR01_0, + "clk_div_ddr01_0", "clk_gate_ddr01_div0", + R_CLKDIVREG27, 16, 5, DEF_DIVFLAG, 1), + SG2042_DIV_RO(DIV_CLK_FPLL_DDR01_1, + "clk_div_ddr01_1", "clk_gate_ddr01_div1", + R_CLKDIVREG28, 16, 5, DEF_DIVFLAG, 1), + + SG2042_DIV_RO(DIV_CLK_DPLL1_DDR23_0, + "clk_div_ddr23_0", "clk_gate_ddr23_div0", + R_CLKDIVREG29, 16, 5, DEF_DIVFLAG, 1), + SG2042_DIV_RO(DIV_CLK_FPLL_DDR23_1, + "clk_div_ddr23_1", "clk_gate_ddr23_div1", + R_CLKDIVREG30, 16, 5, DEF_DIVFLAG, 1), + + SG2042_DIV(DIV_CLK_MPLL_RP_CPU_NORMAL_0, + "clk_div_rp_cpu_normal_0", "clk_gate_rp_cpu_normal_div0", + R_CLKDIVREG0, 16, 5, DEF_DIVFLAG, 1), + SG2042_DIV(DIV_CLK_FPLL_RP_CPU_NORMAL_1, + "clk_div_rp_cpu_normal_1", "clk_gate_rp_cpu_normal_div1", + R_CLKDIVREG1, 16, 5, DEF_DIVFLAG, 1), + + SG2042_DIV(DIV_CLK_MPLL_AXI_DDR_0, + "clk_div_axi_ddr_0", "clk_gate_axi_ddr_div0", + R_CLKDIVREG25, 16, 5, DEF_DIVFLAG, 2), + SG2042_DIV(DIV_CLK_FPLL_AXI_DDR_1, + "clk_div_axi_ddr_1", "clk_gate_axi_ddr_div1", + R_CLKDIVREG26, 16, 5, DEF_DIVFLAG, 1), + + SG2042_DIV(DIV_CLK_FPLL_TOP_RP_CMN_DIV2, + "clk_div_top_rp_cmn_div2", "clk_mux_rp_cpu_normal", + R_CLKDIVREG3, 16, 16, DEF_DIVFLAG, 2), + + SG2042_DIV(DIV_CLK_FPLL_50M_A53, "clk_div_50m_a53", "fpll_clock", + R_CLKDIVREG2, 16, 8, DEF_DIVFLAG, 20), + /* downstream of div_50m_a53 */ + SG2042_DIV(DIV_CLK_FPLL_DIV_TIMER1, "clk_div_timer1", "clk_div_50m_a53", + R_CLKDIVREG6, 16, 16, DEF_DIVFLAG, 1), + SG2042_DIV(DIV_CLK_FPLL_DIV_TIMER2, "clk_div_timer2", "clk_div_50m_a53", + R_CLKDIVREG7, 16, 16, DEF_DIVFLAG, 1), + SG2042_DIV(DIV_CLK_FPLL_DIV_TIMER3, "clk_div_timer3", "clk_div_50m_a53", + R_CLKDIVREG8, 16, 16, DEF_DIVFLAG, 1), + SG2042_DIV(DIV_CLK_FPLL_DIV_TIMER4, "clk_div_timer4", "clk_div_50m_a53", + R_CLKDIVREG9, 16, 16, DEF_DIVFLAG, 1), + SG2042_DIV(DIV_CLK_FPLL_DIV_TIMER5, "clk_div_timer5", "clk_div_50m_a53", + R_CLKDIVREG10, 16, 16, DEF_DIVFLAG, 1), + SG2042_DIV(DIV_CLK_FPLL_DIV_TIMER6, "clk_div_timer6", "clk_div_50m_a53", + R_CLKDIVREG11, 16, 16, DEF_DIVFLAG, 1), + SG2042_DIV(DIV_CLK_FPLL_DIV_TIMER7, "clk_div_timer7", "clk_div_50m_a53", + R_CLKDIVREG12, 16, 16, DEF_DIVFLAG, 1), + SG2042_DIV(DIV_CLK_FPLL_DIV_TIMER8, "clk_div_timer8", "clk_div_50m_a53", + R_CLKDIVREG13, 16, 16, DEF_DIVFLAG, 1), + + /* + * Set clk_div_uart_500m as RO, because the width of CLKDIVREG4 is too + * narrow for us to produce 115200. Use UART internal divider directly. + */ + SG2042_DIV_RO(DIV_CLK_FPLL_UART_500M, "clk_div_uart_500m", "fpll_clock", + R_CLKDIVREG4, 16, 7, DEF_DIVFLAG, 2), + SG2042_DIV(DIV_CLK_FPLL_AHB_LPC, "clk_div_ahb_lpc", "fpll_clock", + R_CLKDIVREG5, 16, 16, DEF_DIVFLAG, 5), + SG2042_DIV(DIV_CLK_FPLL_EFUSE, "clk_div_efuse", "fpll_clock", + R_CLKDIVREG14, 16, 7, DEF_DIVFLAG, 40), + SG2042_DIV(DIV_CLK_FPLL_TX_ETH0, "clk_div_tx_eth0", "fpll_clock", + R_CLKDIVREG16, 16, 11, DEF_DIVFLAG, 8), + SG2042_DIV(DIV_CLK_FPLL_PTP_REF_I_ETH0, + "clk_div_ptp_ref_i_eth0", "fpll_clock", + R_CLKDIVREG17, 16, 8, DEF_DIVFLAG, 20), + SG2042_DIV(DIV_CLK_FPLL_REF_ETH0, "clk_div_ref_eth0", "fpll_clock", + R_CLKDIVREG18, 16, 8, DEF_DIVFLAG, 40), + SG2042_DIV(DIV_CLK_FPLL_EMMC, "clk_div_emmc", "fpll_clock", + R_CLKDIVREG19, 16, 5, DEF_DIVFLAG, 10), + SG2042_DIV(DIV_CLK_FPLL_SD, "clk_div_sd", "fpll_clock", + R_CLKDIVREG21, 16, 5, DEF_DIVFLAG, 10), + + SG2042_DIV(DIV_CLK_FPLL_TOP_AXI0, "clk_div_top_axi0", "fpll_clock", + R_CLKDIVREG23, 16, 5, DEF_DIVFLAG, 10), + /* downstream of div_top_axi0 */ + SG2042_DIV(DIV_CLK_FPLL_100K_EMMC, "clk_div_100k_emmc", "clk_div_top_axi0", + R_CLKDIVREG20, 16, 16, DEF_DIVFLAG, 1000), + SG2042_DIV(DIV_CLK_FPLL_100K_SD, "clk_div_100k_sd", "clk_div_top_axi0", + R_CLKDIVREG22, 16, 16, DEF_DIVFLAG, 1000), + SG2042_DIV(DIV_CLK_FPLL_GPIO_DB, "clk_div_gpio_db", "clk_div_top_axi0", + R_CLKDIVREG15, 16, 16, DEF_DIVFLAG, 1000), + + SG2042_DIV(DIV_CLK_FPLL_TOP_AXI_HSPERI, + "clk_div_top_axi_hsperi", "fpll_clock", + R_CLKDIVREG24, 16, 5, DEF_DIVFLAG, 4), +}; + +#define SG2042_GATE(_id, _name, _parent_name, _flags, \ + _r_enable, _bit_idx, _flag_r) { \ + .id = _id, \ + .name = _name, \ + .parent_name = _parent_name, \ + .flags = _flags, \ + .offset_enable = _r_enable, \ + .bit_idx = _bit_idx, \ + .flag_sysctrl = _flag_r, \ + } + +/* + * GATE items in the array are sorted according to the clock-tree diagram, + * from top to bottom, from upstream to downstream. Read TRM for details. + */ +static const struct sg2042_gate_clock sg2042_gate_clks[] = { + SG2042_GATE(GATE_CLK_DDR01_DIV0, "clk_gate_ddr01_div0", "dpll0_clock", + CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED, + R_CLKDIVREG27, 4, 0), + SG2042_GATE(GATE_CLK_DDR01_DIV1, "clk_gate_ddr01_div1", "fpll_clock", + CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, + R_CLKDIVREG28, 4, 0), + + SG2042_GATE(GATE_CLK_DDR23_DIV0, "clk_gate_ddr23_div0", "dpll1_clock", + CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED, + R_CLKDIVREG29, 4, 0), + SG2042_GATE(GATE_CLK_DDR23_DIV1, "clk_gate_ddr23_div1", "fpll_clock", + CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, + R_CLKDIVREG30, 4, 0), + + SG2042_GATE(GATE_CLK_RP_CPU_NORMAL_DIV0, "clk_gate_rp_cpu_normal_div0", "mpll_clock", + CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, + R_CLKDIVREG0, 4, 0), + SG2042_GATE(GATE_CLK_RP_CPU_NORMAL_DIV1, + "clk_gate_rp_cpu_normal_div1", "fpll_clock", + CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, + R_CLKDIVREG1, 4, 0), + + SG2042_GATE(GATE_CLK_AXI_DDR_DIV0, "clk_gate_axi_ddr_div0", "mpll_clock", + CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, + R_CLKDIVREG25, 4, 0), + SG2042_GATE(GATE_CLK_AXI_DDR_DIV1, "clk_gate_axi_ddr_div1", "fpll_clock", + CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, + R_CLKDIVREG26, 4, 0), + + /* upon are gate clocks as input source for the muxes */ + + SG2042_GATE(GATE_CLK_DDR01, "clk_gate_ddr01", "clk_mux_ddr01", + CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, + R_CLKENREG1, 14, 0), + + SG2042_GATE(GATE_CLK_DDR23, "clk_gate_ddr23", "clk_mux_ddr23", + CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, + R_CLKENREG1, 15, 0), + + SG2042_GATE(GATE_CLK_RP_CPU_NORMAL, + "clk_gate_rp_cpu_normal", "clk_mux_rp_cpu_normal", + CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, + R_CLKENREG0, 0, 0), + + SG2042_GATE(GATE_CLK_AXI_DDR, "clk_gate_axi_ddr", "clk_mux_axi_ddr", + CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, + R_CLKENREG1, 13, 0), + + /* upon are gate clocks directly downstream of muxes */ + + /* downstream of clk_div_top_rp_cmn_div2 */ + SG2042_GATE(GATE_CLK_TOP_RP_CMN_DIV2, + "clk_gate_top_rp_cmn_div2", "clk_div_top_rp_cmn_div2", + CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED, R_CLKENREG0, 2, 0), + SG2042_GATE(GATE_CLK_HSDMA, "clk_gate_hsdma", "clk_gate_top_rp_cmn_div2", + CLK_SET_RATE_PARENT, R_CLKENREG1, 10, 0), + + /* + * downstream of clk_gate_rp_cpu_normal + * + * FIXME: there should be one 1/2 DIV between clk_gate_rp_cpu_normal + * and clk_gate_axi_pcie0/clk_gate_axi_pcie1. + * But the 1/2 DIV is fixed and no configurable register exported, so + * when reading from these two clocks, the rate value are still the + * same as that of clk_gate_rp_cpu_normal, it's not correct. + * This just affects the value read. + */ + SG2042_GATE(GATE_CLK_AXI_PCIE0, + "clk_gate_axi_pcie0", "clk_gate_rp_cpu_normal", + CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED, R_CLKENREG1, 8, 0), + SG2042_GATE(GATE_CLK_AXI_PCIE1, + "clk_gate_axi_pcie1", "clk_gate_rp_cpu_normal", + CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED, R_CLKENREG1, 9, 0), + + /* downstream of div_50m_a53 */ + SG2042_GATE(GATE_CLK_A53_50M, "clk_gate_a53_50m", "clk_div_50m_a53", + CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED, R_CLKENREG0, 1, 0), + SG2042_GATE(GATE_CLK_TIMER1, "clk_gate_timer1", "clk_div_timer1", + CLK_SET_RATE_PARENT, R_CLKENREG0, 12, 0), + SG2042_GATE(GATE_CLK_TIMER2, "clk_gate_timer2", "clk_div_timer2", + CLK_SET_RATE_PARENT, R_CLKENREG0, 13, 0), + SG2042_GATE(GATE_CLK_TIMER3, "clk_gate_timer3", "clk_div_timer3", + CLK_SET_RATE_PARENT, R_CLKENREG0, 14, 0), + SG2042_GATE(GATE_CLK_TIMER4, "clk_gate_timer4", "clk_div_timer4", + CLK_SET_RATE_PARENT, R_CLKENREG0, 15, 0), + SG2042_GATE(GATE_CLK_TIMER5, "clk_gate_timer5", "clk_div_timer5", + CLK_SET_RATE_PARENT, R_CLKENREG0, 16, 0), + SG2042_GATE(GATE_CLK_TIMER6, "clk_gate_timer6", "clk_div_timer6", + CLK_SET_RATE_PARENT, R_CLKENREG0, 17, 0), + SG2042_GATE(GATE_CLK_TIMER7, "clk_gate_timer7", "clk_div_timer7", + CLK_SET_RATE_PARENT, R_CLKENREG0, 18, 0), + SG2042_GATE(GATE_CLK_TIMER8, "clk_gate_timer8", "clk_div_timer8", + CLK_SET_RATE_PARENT, R_CLKENREG0, 19, 0), + + /* gate clocks downstream from div clocks one-to-one */ + SG2042_GATE(GATE_CLK_UART_500M, "clk_gate_uart_500m", "clk_div_uart_500m", + CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED, R_CLKENREG0, 4, 0), + SG2042_GATE(GATE_CLK_AHB_LPC, "clk_gate_ahb_lpc", "clk_div_ahb_lpc", + CLK_SET_RATE_PARENT, R_CLKENREG0, 7, 0), + SG2042_GATE(GATE_CLK_EFUSE, "clk_gate_efuse", "clk_div_efuse", + CLK_SET_RATE_PARENT, R_CLKENREG0, 20, 0), + SG2042_GATE(GATE_CLK_TX_ETH0, "clk_gate_tx_eth0", "clk_div_tx_eth0", + CLK_SET_RATE_PARENT, R_CLKENREG0, 30, 0), + SG2042_GATE(GATE_CLK_PTP_REF_I_ETH0, + "clk_gate_ptp_ref_i_eth0", "clk_div_ptp_ref_i_eth0", + CLK_SET_RATE_PARENT, R_CLKENREG1, 0, 0), + SG2042_GATE(GATE_CLK_REF_ETH0, "clk_gate_ref_eth0", "clk_div_ref_eth0", + CLK_SET_RATE_PARENT, R_CLKENREG1, 1, 0), + SG2042_GATE(GATE_CLK_EMMC_100M, "clk_gate_emmc", "clk_div_emmc", + CLK_SET_RATE_PARENT, R_CLKENREG1, 3, 0), + SG2042_GATE(GATE_CLK_SD_100M, "clk_gate_sd", "clk_div_sd", + CLK_SET_RATE_PARENT, R_CLKENREG1, 6, 0), + + /* downstream of clk_div_top_axi0 */ + SG2042_GATE(GATE_CLK_AHB_ROM, "clk_gate_ahb_rom", "clk_div_top_axi0", + 0, R_CLKENREG0, 8, 0), + SG2042_GATE(GATE_CLK_AHB_SF, "clk_gate_ahb_sf", "clk_div_top_axi0", + 0, R_CLKENREG0, 9, 0), + SG2042_GATE(GATE_CLK_AXI_SRAM, "clk_gate_axi_sram", "clk_div_top_axi0", + CLK_IGNORE_UNUSED, R_CLKENREG0, 10, 0), + SG2042_GATE(GATE_CLK_APB_TIMER, "clk_gate_apb_timer", "clk_div_top_axi0", + CLK_IGNORE_UNUSED, R_CLKENREG0, 11, 0), + SG2042_GATE(GATE_CLK_APB_EFUSE, "clk_gate_apb_efuse", "clk_div_top_axi0", + 0, R_CLKENREG0, 21, 0), + SG2042_GATE(GATE_CLK_APB_GPIO, "clk_gate_apb_gpio", "clk_div_top_axi0", + 0, R_CLKENREG0, 22, 0), + SG2042_GATE(GATE_CLK_APB_GPIO_INTR, + "clk_gate_apb_gpio_intr", "clk_div_top_axi0", + 0, R_CLKENREG0, 23, 0), + SG2042_GATE(GATE_CLK_APB_I2C, "clk_gate_apb_i2c", "clk_div_top_axi0", + 0, R_CLKENREG0, 26, 0), + SG2042_GATE(GATE_CLK_APB_WDT, "clk_gate_apb_wdt", "clk_div_top_axi0", + 0, R_CLKENREG0, 27, 0), + SG2042_GATE(GATE_CLK_APB_PWM, "clk_gate_apb_pwm", "clk_div_top_axi0", + 0, R_CLKENREG0, 28, 0), + SG2042_GATE(GATE_CLK_APB_RTC, "clk_gate_apb_rtc", "clk_div_top_axi0", + 0, R_CLKENREG0, 29, 0), + SG2042_GATE(GATE_CLK_TOP_AXI0, "clk_gate_top_axi0", "clk_div_top_axi0", + CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, + R_CLKENREG1, 11, 0), + /* downstream of DIV clocks which are sourced from clk_div_top_axi0 */ + SG2042_GATE(GATE_CLK_GPIO_DB, "clk_gate_gpio_db", "clk_div_gpio_db", + CLK_SET_RATE_PARENT, R_CLKENREG0, 24, 0), + SG2042_GATE(GATE_CLK_100K_EMMC, "clk_gate_100k_emmc", "clk_div_100k_emmc", + CLK_SET_RATE_PARENT, R_CLKENREG1, 4, 0), + SG2042_GATE(GATE_CLK_100K_SD, "clk_gate_100k_sd", "clk_div_100k_sd", + CLK_SET_RATE_PARENT, R_CLKENREG1, 7, 0), + + /* downstream of clk_div_top_axi_hsperi */ + SG2042_GATE(GATE_CLK_SYSDMA_AXI, + "clk_gate_sysdma_axi", "clk_div_top_axi_hsperi", + CLK_SET_RATE_PARENT, R_CLKENREG0, 3, 0), + SG2042_GATE(GATE_CLK_APB_UART, + "clk_gate_apb_uart", "clk_div_top_axi_hsperi", + CLK_SET_RATE_PARENT, R_CLKENREG0, 5, 0), + SG2042_GATE(GATE_CLK_AXI_DBG_I2C, + "clk_gate_axi_dbg_i2c", "clk_div_top_axi_hsperi", + CLK_SET_RATE_PARENT, R_CLKENREG0, 6, 0), + SG2042_GATE(GATE_CLK_APB_SPI, + "clk_gate_apb_spi", "clk_div_top_axi_hsperi", + CLK_SET_RATE_PARENT, R_CLKENREG0, 25, 0), + SG2042_GATE(GATE_CLK_AXI_ETH0, + "clk_gate_axi_eth0", "clk_div_top_axi_hsperi", + CLK_SET_RATE_PARENT, R_CLKENREG0, 31, 0), + SG2042_GATE(GATE_CLK_AXI_EMMC, + "clk_gate_axi_emmc", "clk_div_top_axi_hsperi", + CLK_SET_RATE_PARENT, R_CLKENREG1, 2, 0), + SG2042_GATE(GATE_CLK_AXI_SD, + "clk_gate_axi_sd", "clk_div_top_axi_hsperi", + CLK_SET_RATE_PARENT, R_CLKENREG1, 5, 0), + SG2042_GATE(GATE_CLK_TOP_AXI_HSPERI, + "clk_gate_top_axi_hsperi", "clk_div_top_axi_hsperi", + CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, + R_CLKENREG1, 12, 0), + + /* downstream of clk_gate_rp_cpu_normal about rxu */ + SG2042_GATE(GATE_CLK_RXU0, "clk_gate_rxu0", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 0, 1), + SG2042_GATE(GATE_CLK_RXU1, "clk_gate_rxu1", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 1, 1), + SG2042_GATE(GATE_CLK_RXU2, "clk_gate_rxu2", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 2, 1), + SG2042_GATE(GATE_CLK_RXU3, "clk_gate_rxu3", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 3, 1), + SG2042_GATE(GATE_CLK_RXU4, "clk_gate_rxu4", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 4, 1), + SG2042_GATE(GATE_CLK_RXU5, "clk_gate_rxu5", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 5, 1), + SG2042_GATE(GATE_CLK_RXU6, "clk_gate_rxu6", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 6, 1), + SG2042_GATE(GATE_CLK_RXU7, "clk_gate_rxu7", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 7, 1), + SG2042_GATE(GATE_CLK_RXU8, "clk_gate_rxu8", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 8, 1), + SG2042_GATE(GATE_CLK_RXU9, "clk_gate_rxu9", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 9, 1), + SG2042_GATE(GATE_CLK_RXU10, "clk_gate_rxu10", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 10, 1), + SG2042_GATE(GATE_CLK_RXU11, "clk_gate_rxu11", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 11, 1), + SG2042_GATE(GATE_CLK_RXU12, "clk_gate_rxu12", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 12, 1), + SG2042_GATE(GATE_CLK_RXU13, "clk_gate_rxu13", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 13, 1), + SG2042_GATE(GATE_CLK_RXU14, "clk_gate_rxu14", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 14, 1), + SG2042_GATE(GATE_CLK_RXU15, "clk_gate_rxu15", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 15, 1), + SG2042_GATE(GATE_CLK_RXU16, "clk_gate_rxu16", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 16, 1), + SG2042_GATE(GATE_CLK_RXU17, "clk_gate_rxu17", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 17, 1), + SG2042_GATE(GATE_CLK_RXU18, "clk_gate_rxu18", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 18, 1), + SG2042_GATE(GATE_CLK_RXU19, "clk_gate_rxu19", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 19, 1), + SG2042_GATE(GATE_CLK_RXU20, "clk_gate_rxu20", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 20, 1), + SG2042_GATE(GATE_CLK_RXU21, "clk_gate_rxu21", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 21, 1), + SG2042_GATE(GATE_CLK_RXU22, "clk_gate_rxu22", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 22, 1), + SG2042_GATE(GATE_CLK_RXU23, "clk_gate_rxu23", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 23, 1), + SG2042_GATE(GATE_CLK_RXU24, "clk_gate_rxu24", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 24, 1), + SG2042_GATE(GATE_CLK_RXU25, "clk_gate_rxu25", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 25, 1), + SG2042_GATE(GATE_CLK_RXU26, "clk_gate_rxu26", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 26, 1), + SG2042_GATE(GATE_CLK_RXU27, "clk_gate_rxu27", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 27, 1), + SG2042_GATE(GATE_CLK_RXU28, "clk_gate_rxu28", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 28, 1), + SG2042_GATE(GATE_CLK_RXU29, "clk_gate_rxu29", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 29, 1), + SG2042_GATE(GATE_CLK_RXU30, "clk_gate_rxu30", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 30, 1), + SG2042_GATE(GATE_CLK_RXU31, "clk_gate_rxu31", "clk_gate_rp_cpu_normal", + 0, R_RP_RXU_CLK_ENABLE, 31, 1), + + /* downstream of clk_gate_rp_cpu_normal about mp */ + SG2042_GATE(GATE_CLK_MP0, "clk_gate_mp0", "clk_gate_rp_cpu_normal", + CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, R_MP0_CONTROL_REG, 0, 1), + SG2042_GATE(GATE_CLK_MP1, "clk_gate_mp1", "clk_gate_rp_cpu_normal", + CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, R_MP1_CONTROL_REG, 0, 1), + SG2042_GATE(GATE_CLK_MP2, "clk_gate_mp2", "clk_gate_rp_cpu_normal", + CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, R_MP2_CONTROL_REG, 0, 1), + SG2042_GATE(GATE_CLK_MP3, "clk_gate_mp3", "clk_gate_rp_cpu_normal", + CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, R_MP3_CONTROL_REG, 0, 1), + SG2042_GATE(GATE_CLK_MP4, "clk_gate_mp4", "clk_gate_rp_cpu_normal", + CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, R_MP4_CONTROL_REG, 0, 1), + SG2042_GATE(GATE_CLK_MP5, "clk_gate_mp5", "clk_gate_rp_cpu_normal", + CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, R_MP5_CONTROL_REG, 0, 1), + SG2042_GATE(GATE_CLK_MP6, "clk_gate_mp6", "clk_gate_rp_cpu_normal", + CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, R_MP6_CONTROL_REG, 0, 1), + SG2042_GATE(GATE_CLK_MP7, "clk_gate_mp7", "clk_gate_rp_cpu_normal", + CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, R_MP7_CONTROL_REG, 0, 1), + SG2042_GATE(GATE_CLK_MP8, "clk_gate_mp8", "clk_gate_rp_cpu_normal", + CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, R_MP8_CONTROL_REG, 0, 1), + SG2042_GATE(GATE_CLK_MP9, "clk_gate_mp9", "clk_gate_rp_cpu_normal", + CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, R_MP9_CONTROL_REG, 0, 1), + SG2042_GATE(GATE_CLK_MP10, "clk_gate_mp10", "clk_gate_rp_cpu_normal", + CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, R_MP10_CONTROL_REG, 0, 1), + SG2042_GATE(GATE_CLK_MP11, "clk_gate_mp11", "clk_gate_rp_cpu_normal", + CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, R_MP11_CONTROL_REG, 0, 1), + SG2042_GATE(GATE_CLK_MP12, "clk_gate_mp12", "clk_gate_rp_cpu_normal", + CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, R_MP12_CONTROL_REG, 0, 1), + SG2042_GATE(GATE_CLK_MP13, "clk_gate_mp13", "clk_gate_rp_cpu_normal", + CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, R_MP13_CONTROL_REG, 0, 1), + SG2042_GATE(GATE_CLK_MP14, "clk_gate_mp14", "clk_gate_rp_cpu_normal", + CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, R_MP14_CONTROL_REG, 0, 1), + SG2042_GATE(GATE_CLK_MP15, "clk_gate_mp15", "clk_gate_rp_cpu_normal", + CLK_IGNORE_UNUSED | CLK_IS_CRITICAL, R_MP15_CONTROL_REG, 0, 1), +}; + +#define SG2042_MUX(_id, _name, _parent_names, _flags, _r_select, _shift, _width) { \ + .id = _id, \ + .name = _name, \ + .parent_names = _parent_names, \ + .num_parents = ARRAY_SIZE(_parent_names), \ + .flags = _flags, \ + .offset_select = _r_select, \ + .shift = _shift, \ + .width = _width, \ + } + +/* + * Note: regarding names for mux clock, "0/1" or "div0/div1" means the + * first/second parent input source, not the register value. + * For example: + * "clk_div_ddr01_0" is the name of Clock divider 0 control of DDR01, and + * "clk_gate_ddr01_div0" is the gate clock in front of the "clk_div_ddr01_0", + * they are both controlled by register CLKDIVREG27; + * "clk_div_ddr01_1" is the name of Clock divider 1 control of DDR01, and + * "clk_gate_ddr01_div1" is the gate clock in front of the "clk_div_ddr01_1", + * they are both controlled by register CLKDIVREG28; + * While for register value of mux selection, use Clock Select for DDR01’s clock + * as example, see CLKSELREG0, bit[2]. + * 1: Select in_dpll0_clk as clock source, correspondng to the parent input + * source from "clk_div_ddr01_0". + * 0: Select in_fpll_clk as clock source, corresponding to the parent input + * source from "clk_div_ddr01_1". + * So we need a table to define the array of register values corresponding to + * the parent index and tell CCF about this when registering mux clock. + */ +static const u32 sg2042_mux_table[] = {1, 0}; + +static const char *const clk_mux_ddr01_p[] = { + "clk_div_ddr01_0", "clk_div_ddr01_1"}; +static const char *const clk_mux_ddr23_p[] = { + "clk_div_ddr23_0", "clk_div_ddr23_1"}; +static const char *const clk_mux_rp_cpu_normal_p[] = { + "clk_div_rp_cpu_normal_0", "clk_div_rp_cpu_normal_1"}; +static const char *const clk_mux_axi_ddr_p[] = { + "clk_div_axi_ddr_0", "clk_div_axi_ddr_1"}; + +static struct sg2042_mux_clock sg2042_mux_clks[] = { + SG2042_MUX(MUX_CLK_DDR01, "clk_mux_ddr01", clk_mux_ddr01_p, + CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT | CLK_MUX_READ_ONLY, + R_CLKSELREG0, 2, 1), + SG2042_MUX(MUX_CLK_DDR23, "clk_mux_ddr23", clk_mux_ddr23_p, + CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT | CLK_MUX_READ_ONLY, + R_CLKSELREG0, 3, 1), + SG2042_MUX(MUX_CLK_RP_CPU_NORMAL, "clk_mux_rp_cpu_normal", clk_mux_rp_cpu_normal_p, + CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT, + R_CLKSELREG0, 0, 1), + SG2042_MUX(MUX_CLK_AXI_DDR, "clk_mux_axi_ddr", clk_mux_axi_ddr_p, + CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT, + R_CLKSELREG0, 1, 1), +}; + +static DEFINE_SPINLOCK(sg2042_clk_lock); + +static int sg2042_clk_register_plls(struct sg2042_clk_data *clk_data, + struct sg2042_pll_clock pll_clks[], + int num_pll_clks) +{ + struct clk_hw *hw; + struct sg2042_pll_clock *pll; + int i, ret = 0; + + for (i = 0; i < num_pll_clks; i++) { + pll = &pll_clks[i]; + /* assign these for ops usage during registration */ + pll->map = clk_data->regmap_syscon; + pll->lock = &sg2042_clk_lock; + + hw = &pll->hw; + ret = clk_hw_register(NULL, hw); + if (ret) { + pr_err("failed to register clock %s\n", pll->name); + break; + } + + clk_data->onecell_data.hws[pll->id] = hw; + } + + /* leave unregister to outside if failed */ + return ret; +} + +static int sg2042_clk_register_divs(struct sg2042_clk_data *clk_data, + struct sg2042_divider_clock div_clks[], + int num_div_clks) +{ + struct clk_hw *hw; + struct sg2042_divider_clock *div; + int i, ret = 0; + + for (i = 0; i < num_div_clks; i++) { + div = &div_clks[i]; + + if (div->div_flags & CLK_DIVIDER_HIWORD_MASK) { + if (div->width + div->shift > 16) { + pr_warn("divider value exceeds LOWORD field\n"); + ret = -EINVAL; + break; + } + } + + div->reg = clk_data->iobase + div->offset_ctrl; + div->lock = &sg2042_clk_lock; + + hw = &div->hw; + ret = clk_hw_register(NULL, hw); + if (ret) { + pr_err("failed to register clock %s\n", div->name); + break; + } + + clk_data->onecell_data.hws[div->id] = hw; + } + + /* leave unregister to outside if failed */ + return ret; +} + +static int sg2042_clk_register_gates(struct sg2042_clk_data *clk_data, + const struct sg2042_gate_clock gate_clks[], + int num_gate_clks) +{ + struct clk_hw *hw; + const struct sg2042_gate_clock *gate; + int i, ret = 0; + void __iomem *reg; + + for (i = 0; i < num_gate_clks; i++) { + gate = &gate_clks[i]; + if (gate->flag_sysctrl) + reg = clk_data->iobase_syscon + gate->offset_enable; + else + reg = clk_data->iobase + gate->offset_enable; + hw = clk_hw_register_gate(NULL, + gate->name, + gate->parent_name, + gate->flags, + reg, + gate->bit_idx, + 0, + &sg2042_clk_lock); + if (IS_ERR(hw)) { + pr_err("failed to register clock %s\n", gate->name); + ret = PTR_ERR(hw); + break; + } + + clk_data->onecell_data.hws[gate->id] = hw; + } + + /* leave unregister to outside if failed */ + return ret; +} + +static int sg2042_mux_notifier_cb(struct notifier_block *nb, + unsigned long event, + void *data) +{ + int ret = 0; + struct clk_notifier_data *ndata = data; + struct clk_hw *hw = __clk_get_hw(ndata->clk); + const struct clk_ops *ops = &clk_mux_ops; + struct sg2042_mux_clock *mux = to_sg2042_mux_nb(nb); + + /* To switch to fpll before changing rate and restore after that */ + if (event == PRE_RATE_CHANGE) { + mux->original_index = ops->get_parent(hw); + + /* + * "1" is the array index of the second parent input source of + * mux. For SG2042, it's fpll for all mux clocks. + * "0" is the array index of the frist parent input source of + * mux, For SG2042, it's mpll. + * FIXME, any good idea to avoid magic number? + */ + if (mux->original_index == 0) + ret = ops->set_parent(hw, 1); + } else if (event == POST_RATE_CHANGE) { + ret = ops->set_parent(hw, mux->original_index); + } + + return notifier_from_errno(ret); +} + +static int sg2042_clk_register_muxs(struct sg2042_clk_data *clk_data, + struct sg2042_mux_clock mux_clks[], + int num_mux_clks) +{ + struct clk_hw *hw; + struct sg2042_mux_clock *mux; + int i, ret = 0; + + for (i = 0; i < num_mux_clks; i++) { + mux = &mux_clks[i]; + + hw = clk_hw_register_mux_table(NULL, + mux->name, + mux->parent_names, + mux->num_parents, + mux->flags, + clk_data->iobase + mux->offset_select, + mux->shift, + BIT(mux->width) - 1, + 0, + sg2042_mux_table, + &sg2042_clk_lock); + if (IS_ERR(hw)) { + pr_err("failed to register clock %s\n", mux->name); + ret = PTR_ERR(hw); + break; + } + + clk_data->onecell_data.hws[mux->id] = hw; + + /* + * FIXME: Theoretically, we should set parent for the + * mux, but seems hardware has done this for us with + * default value, so we don't set parent again here. + */ + + if (!(mux->flags & CLK_MUX_READ_ONLY)) { + mux->clk_nb.notifier_call = sg2042_mux_notifier_cb; + ret = clk_notifier_register(hw->clk, &mux->clk_nb); + if (ret) { + pr_err("failed to register clock notifier for %s\n", + mux->name); + goto error_cleanup; + } + } + } + + return 0; + +error_cleanup: + /* unregister notifier and release the memory allocated */ + for (i = 0; i < num_mux_clks; i++) { + mux = &mux_clks[i]; + + hw = clk_data->onecell_data.hws[mux->id]; + + if (hw) + clk_notifier_unregister(hw->clk, &mux->clk_nb); + } + + /* leave clk unregister to outside if failed */ + return ret; +} + +static int __init sg2042_clk_init_clk_data(struct device_node *node, + int num_clks, + struct sg2042_clk_data **pp_clk_data) +{ + int ret = 0; + struct sg2042_clk_data *clk_data = NULL; + struct device_node *np_syscon; + + np_syscon = of_parse_phandle(node, "sophgo,system-ctrl", 0); + if (!np_syscon) { + pr_err("failed to get system-ctrl node\n"); + ret = -EINVAL; + goto error_out; + } + + clk_data = kzalloc(struct_size(clk_data, onecell_data.hws, num_clks), GFP_KERNEL); + if (!clk_data) { + ret = -ENOMEM; + goto error_out; + } + + clk_data->regmap_syscon = device_node_to_regmap(np_syscon); + if (IS_ERR(clk_data->regmap_syscon)) { + ret = PTR_ERR(clk_data->regmap_syscon); + goto cleanup; + } + clk_data->iobase_syscon = of_iomap(np_syscon, 0); + clk_data->iobase = of_iomap(node, 0); + clk_data->onecell_data.num = num_clks; + + *pp_clk_data = clk_data; + return ret; + +cleanup: + kfree(clk_data); + +error_out: + return ret; +} + +static void __init sg2042_clk_init(struct device_node *node) +{ + struct sg2042_clk_data *clk_data = NULL; + int i, ret = 0; + int num_clks = 0; + + num_clks = ARRAY_SIZE(sg2042_pll_clks) + + ARRAY_SIZE(sg2042_div_clks) + + ARRAY_SIZE(sg2042_gate_clks) + + ARRAY_SIZE(sg2042_mux_clks); + if (num_clks == 0) { + ret = -EINVAL; + goto error_out; + } + + ret = sg2042_clk_init_clk_data(node, num_clks, &clk_data); + if (ret < 0) + goto error_out; + + ret = sg2042_clk_register_plls(clk_data, sg2042_pll_clks, + ARRAY_SIZE(sg2042_pll_clks)); + if (ret) + goto cleanup; + + ret = sg2042_clk_register_divs(clk_data, sg2042_div_clks, + ARRAY_SIZE(sg2042_div_clks)); + if (ret) + goto cleanup; + + ret = sg2042_clk_register_gates(clk_data, sg2042_gate_clks, + ARRAY_SIZE(sg2042_gate_clks)); + if (ret) + goto cleanup; + + ret = sg2042_clk_register_muxs(clk_data, sg2042_mux_clks, + ARRAY_SIZE(sg2042_mux_clks)); + if (ret) + goto cleanup; + + ret = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, &clk_data->onecell_data); + if (ret) + goto cleanup; + + return; + +cleanup: + for (i = 0; i < num_clks; i++) { + if (clk_data->onecell_data.hws[i]) + clk_hw_unregister(clk_data->onecell_data.hws[i]); + } + kfree(clk_data); + +error_out: + pr_err("%s failed error number %d\n", __func__, ret); +} + +CLK_OF_DECLARE(sg2042_clk, "sophgo,sg2042-clkgen", sg2042_clk_init); diff --git a/drivers/clk/sophgo/clk-sophgo-sg2042.h b/drivers/clk/sophgo/clk-sophgo-sg2042.h new file mode 100644 index 000000000000..8dc02b337bdc --- /dev/null +++ b/drivers/clk/sophgo/clk-sophgo-sg2042.h @@ -0,0 +1,236 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __CLK_SOPHGO_SG2042_H +#define __CLK_SOPHGO_SG2042_H + +#include +#include +#include + +/* Registers defined in SYS_CTRL */ +#define R_PLL_STAT 0xC0 +#define R_PLL_CLKEN_CONTROL 0xC4 +#define R_MPLL_CONTROL 0xE8 +#define R_FPLL_CONTROL 0xF4 +#define R_DPLL0_CONTROL 0xF8 +#define R_DPLL1_CONTROL 0xFC + +#define R_RP_RXU_CLK_ENABLE 0x0368 +#define R_MP0_STATUS_REG 0x0380 +#define R_MP0_CONTROL_REG 0x0384 +#define R_MP1_STATUS_REG 0x0388 +#define R_MP1_CONTROL_REG 0x038C +#define R_MP2_STATUS_REG 0x0390 +#define R_MP2_CONTROL_REG 0x0394 +#define R_MP3_STATUS_REG 0x0398 +#define R_MP3_CONTROL_REG 0x039C +#define R_MP4_STATUS_REG 0x03A0 +#define R_MP4_CONTROL_REG 0x03A4 +#define R_MP5_STATUS_REG 0x03A8 +#define R_MP5_CONTROL_REG 0x03AC +#define R_MP6_STATUS_REG 0x03B0 +#define R_MP6_CONTROL_REG 0x03B4 +#define R_MP7_STATUS_REG 0x03B8 +#define R_MP7_CONTROL_REG 0x03BC +#define R_MP8_STATUS_REG 0x03C0 +#define R_MP8_CONTROL_REG 0x03C4 +#define R_MP9_STATUS_REG 0x03C8 +#define R_MP9_CONTROL_REG 0x03CC +#define R_MP10_STATUS_REG 0x03D0 +#define R_MP10_CONTROL_REG 0x03D4 +#define R_MP11_STATUS_REG 0x03D8 +#define R_MP11_CONTROL_REG 0x03DC +#define R_MP12_STATUS_REG 0x03E0 +#define R_MP12_CONTROL_REG 0x03E4 +#define R_MP13_STATUS_REG 0x03E8 +#define R_MP13_CONTROL_REG 0x03EC +#define R_MP14_STATUS_REG 0x03F0 +#define R_MP14_CONTROL_REG 0x03F4 +#define R_MP15_STATUS_REG 0x03F8 +#define R_MP15_CONTROL_REG 0x03FC + +/* Registers defined in CLOCK */ +#define R_CLKENREG0 0x00 +#define R_CLKENREG1 0x04 +#define R_CLKSELREG0 0x20 +#define R_CLKDIVREG0 0x40 +#define R_CLKDIVREG1 0x44 +#define R_CLKDIVREG2 0x48 +#define R_CLKDIVREG3 0x4C +#define R_CLKDIVREG4 0x50 +#define R_CLKDIVREG5 0x54 +#define R_CLKDIVREG6 0x58 +#define R_CLKDIVREG7 0x5C +#define R_CLKDIVREG8 0x60 +#define R_CLKDIVREG9 0x64 +#define R_CLKDIVREG10 0x68 +#define R_CLKDIVREG11 0x6C +#define R_CLKDIVREG12 0x70 +#define R_CLKDIVREG13 0x74 +#define R_CLKDIVREG14 0x78 +#define R_CLKDIVREG15 0x7C +#define R_CLKDIVREG16 0x80 +#define R_CLKDIVREG17 0x84 +#define R_CLKDIVREG18 0x88 +#define R_CLKDIVREG19 0x8C +#define R_CLKDIVREG20 0x90 +#define R_CLKDIVREG21 0x94 +#define R_CLKDIVREG22 0x98 +#define R_CLKDIVREG23 0x9C +#define R_CLKDIVREG24 0xA0 +#define R_CLKDIVREG25 0xA4 +#define R_CLKDIVREG26 0xA8 +#define R_CLKDIVREG27 0xAC +#define R_CLKDIVREG28 0xB0 +#define R_CLKDIVREG29 0xB4 +#define R_CLKDIVREG30 0xB8 + +/* + * clock common data + * @iobase: address of clock-controller + * @iobase_syscon & @regmap_syscon: point to the same address of system-controller, + * the reason we use two different type of pointer just due to PLL uses + * regmap while others use iomem. + * @lock: clock register access lock + * @onecell_data: used for adding providers. + */ +struct sg2042_clk_data { + void __iomem *iobase; + void __iomem *iobase_syscon; + struct regmap *regmap_syscon; + struct clk_hw_onecell_data onecell_data; +}; + +/* + * PLL clock + * @id: used to map clk_onecell_data + * @name: used for print even when clk registration failed + * @map: used for regmap read/write, regmap is more useful + * then iomem address when we have multiple offsets + * for different registers. + * NOTE: PLL registers are all in SYS_CTRL! + * @lock: spinlock to protect register access + * @offset_status: offset of pll status registers + * @offset_enable: offset of pll enable registers + * @offset_ctrl: offset of pll control registers + * @shift_status_lock: shift of XXX_LOCK in pll status register + * @shift_status_updating: shift of UPDATING_XXX in pll status register + * @shift_enable: shift of XXX_CLK_EN in pll enable register + */ +struct sg2042_pll_clock { + struct clk_hw hw; + + /* private data */ + unsigned int id; + const char *name; + + struct regmap *map; + /* modification of frequency can only be served one at the time */ + spinlock_t *lock; + + u32 offset_status; + u32 offset_enable; + u32 offset_ctrl; + u8 shift_status_lock; + u8 shift_status_updating; + u8 shift_enable; +}; + +#define to_sg2042_pll_clk(_hw) container_of(_hw, struct sg2042_pll_clock, hw) + +/* + * Divider clock + * @id: used to map clk_onecell_data + * @name: used for print even when clk registration failed + * @reg: used for readl/writel. + * NOTE: DIV registers are ALL in CLOCK! + * @lock: spinlock to protect register access + * @offset_ctrl: offset of divider control registers + * @shift: shift of "Clock Divider Factor" in divider control register + * @width: width of "Clock Divider Factor" in divider control register + * @div_flags: private flags for this clock, not for framework-specific + * @initval: In the divider control register, we can configure whether + * to use the value of "Clock Divider Factor" or just use + * the initial value pre-configured by IC. BIT[3] controls + * this and by default (value is 0), means initial value + * is used. + * **NOTE** that we cannot read the initial value (default + * value when poweron) and default value of "Clock Divider + * Factor" is zero, which I think is a hardware design flaw + * and should be sync-ed with the initial value. So in + * software we have to add a configuration item (initval) + * to manually configure this value and use it when BIT[3] + * is zero. + */ +struct sg2042_divider_clock { + struct clk_hw hw; + + /* private data */ + unsigned int id; + const char *name; + + void __iomem *reg; + /* modification of frequency can only be served one at the time */ + spinlock_t *lock; + + unsigned long offset_ctrl; + u8 shift; + u8 width; + u8 div_flags; + u32 initval; +}; + +#define to_sg2042_clk_divider(_hw) \ + container_of(_hw, struct sg2042_divider_clock, hw) + +/* + * Gate clock + * @id: used to map clk_onecell_data + * @name: string of this clock name + * @parent_name: string of parent clock name + * @flags: framework-specific flags for this clock + * @offset_enable: offset of gate enable registers + * @bit_idx: which bit in the register controls gating of this clock + * @flag_sysctrl: flag if this clock is controlled by registers defined + * in SYS_CTRL, 1: yes, 0: no, it's in CLOCK. + * NOTE: Gate registers are scattered in SYS_CTRL and CLOCK! + */ +struct sg2042_gate_clock { + unsigned int id; + const char *name; + const char *parent_name; + unsigned long flags; + unsigned long offset_enable; + u8 bit_idx; + u8 flag_sysctrl; +}; + +/* + * Mux clock + * @id: used to map clk_onecell_data + * @name: string of this clock name + * @parent_name: string array of parents' clock name + * @flags: framework-specific flags for this clock + * @offset_select: offset of mux selection registers + * NOTE: MUX registers are ALL in CLOCK! + * @shift: shift of "Clock Select" in mux selection register + * @width: width of "Clock Select" in mux selection register + * @clk_nb: used for notification + * @original_index: set by notifier callback + */ +struct sg2042_mux_clock { + unsigned int id; + const char *name; + const char * const *parent_names; + u8 num_parents; + unsigned long flags; + unsigned long offset_select; + u8 shift; + u8 width; + struct notifier_block clk_nb; + u8 original_index; +}; + +#define to_sg2042_mux_nb(_nb) container_of(_nb, struct sg2042_mux_clock, clk_nb) + +#endif /* __CLK_SOPHGO_SG2042_H */