From patchwork Fri Apr 14 02:41:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xingyu Wu X-Patchwork-Id: 13210896 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C6E33C77B71 for ; Fri, 14 Apr 2023 02:43:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=IcNpaqIDebbzi289L62H9l+tkbgnAXRQDKAUToKdvto=; b=reOKtpd5YgTcob vovOlO94WKTcCkbjSZlLcxAfAWduzoQxbZEFL2Re7jiVWW13sy54qh5HTjsYbzYBlxesnj5g9QXni ztTt8EUXdU0fEcolsRn7mEdTu4AY3yUXE8enZQWYuzBTDbiVPsdKmr+1LaiSelgBfxxkAAC7qVV0S KEx6eWR/frm4nHDR7ZNbpZHbt9hTHB7EgyTyDaxN7CGE53an9yI/VY0yFTzACaA8nOFynm7UWunXi BSqJOj/Kz7ol/Ef+6sVo/+Z5mjSsRXgaXZ7EOftDnt0PwbEn5RZTs97yidlj/N+5DzzrB9U533o9A bBaodMDZLxBsD6GeSBpg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pn9PX-008AFa-2p; Fri, 14 Apr 2023 02:43:39 +0000 Received: from fd01.gateway.ufhost.com ([61.152.239.71]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pn9PN-008A7O-2V for linux-riscv@lists.infradead.org; Fri, 14 Apr 2023 02:43:36 +0000 Received: from EXMBX165.cuchost.com (unknown [175.102.18.54]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "EXMBX165", Issuer "EXMBX165" (not verified)) by fd01.gateway.ufhost.com (Postfix) with ESMTP id 2936F24DB8C; Fri, 14 Apr 2023 10:42:58 +0800 (CST) Received: from EXMBX061.cuchost.com (172.16.6.61) by EXMBX165.cuchost.com (172.16.6.75) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Fri, 14 Apr 2023 10:42:58 +0800 Received: from localhost.localdomain (183.27.97.249) by EXMBX061.cuchost.com (172.16.6.61) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Fri, 14 Apr 2023 10:42:56 +0800 From: Xingyu Wu To: , , "Michael Turquette" , Stephen Boyd , Krzysztof Kozlowski , Philipp Zabel , Conor Dooley , "Emil Renner Berthing" CC: Rob Herring , Paul Walmsley , Palmer Dabbelt , Albert Ou , Hal Feng , Xingyu Wu , William Qiu , , Subject: [PATCH v3 2/7] clk: starfive: Add StarFive JH7110 PLL clock driver Date: Fri, 14 Apr 2023 10:41:52 +0800 Message-ID: <20230414024157.53203-3-xingyu.wu@starfivetech.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230414024157.53203-1-xingyu.wu@starfivetech.com> References: <20230414024157.53203-1-xingyu.wu@starfivetech.com> MIME-Version: 1.0 X-Originating-IP: [183.27.97.249] X-ClientProxiedBy: EXCAS066.cuchost.com (172.16.6.26) To EXMBX061.cuchost.com (172.16.6.61) X-YovoleRuleAgent: yovoleflag X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230413_194330_299316_6B729A1C X-CRM114-Status: GOOD ( 25.91 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Add driver for the StarFive JH7110 PLL clock controller and they work by reading and setting syscon registers. Signed-off-by: Xingyu Wu --- MAINTAINERS | 6 + drivers/clk/starfive/Kconfig | 8 + drivers/clk/starfive/Makefile | 1 + .../clk/starfive/clk-starfive-jh7110-pll.c | 427 ++++++++++++++++++ .../clk/starfive/clk-starfive-jh7110-pll.h | 293 ++++++++++++ 5 files changed, 735 insertions(+) create mode 100644 drivers/clk/starfive/clk-starfive-jh7110-pll.c create mode 100644 drivers/clk/starfive/clk-starfive-jh7110-pll.h diff --git a/MAINTAINERS b/MAINTAINERS index 4c0b39c44957..03051ae2e9e5 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -19911,6 +19911,12 @@ S: Supported F: Documentation/devicetree/bindings/mmc/starfive* F: drivers/mmc/host/dw_mmc-starfive.c +STARFIVE JH7110 PLL CLOCK DRIVER +M: Xingyu Wu +S: Supported +F: Documentation/devicetree/bindings/clock/starfive,jh7110-pll.yaml +F: drivers/clk/starfive/clk-starfive-jh7110-pll.* + STARFIVE JH71X0 CLOCK DRIVERS M: Emil Renner Berthing M: Hal Feng diff --git a/drivers/clk/starfive/Kconfig b/drivers/clk/starfive/Kconfig index 71c1148ee5f6..e306edf4defa 100644 --- a/drivers/clk/starfive/Kconfig +++ b/drivers/clk/starfive/Kconfig @@ -21,6 +21,14 @@ config CLK_STARFIVE_JH7100_AUDIO Say Y or M here to support the audio clocks on the StarFive JH7100 SoC. +config CLK_STARFIVE_JH7110_PLL + bool "StarFive JH7110 PLL clock support" + depends on ARCH_STARFIVE || COMPILE_TEST + default ARCH_STARFIVE + help + Say yes here to support the PLL clock controller on the + StarFive JH7110 SoC. + config CLK_STARFIVE_JH7110_SYS bool "StarFive JH7110 system clock support" depends on ARCH_STARFIVE || COMPILE_TEST diff --git a/drivers/clk/starfive/Makefile b/drivers/clk/starfive/Makefile index f3df7d957b1e..b48e539e52b0 100644 --- a/drivers/clk/starfive/Makefile +++ b/drivers/clk/starfive/Makefile @@ -4,5 +4,6 @@ obj-$(CONFIG_CLK_STARFIVE_JH71X0) += clk-starfive-jh71x0.o obj-$(CONFIG_CLK_STARFIVE_JH7100) += clk-starfive-jh7100.o obj-$(CONFIG_CLK_STARFIVE_JH7100_AUDIO) += clk-starfive-jh7100-audio.o +obj-$(CONFIG_CLK_STARFIVE_JH7110_PLL) += clk-starfive-jh7110-pll.o obj-$(CONFIG_CLK_STARFIVE_JH7110_SYS) += clk-starfive-jh7110-sys.o obj-$(CONFIG_CLK_STARFIVE_JH7110_AON) += clk-starfive-jh7110-aon.o diff --git a/drivers/clk/starfive/clk-starfive-jh7110-pll.c b/drivers/clk/starfive/clk-starfive-jh7110-pll.c new file mode 100644 index 000000000000..43d707ea45c7 --- /dev/null +++ b/drivers/clk/starfive/clk-starfive-jh7110-pll.c @@ -0,0 +1,427 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * StarFive JH7110 PLL Clock Generator Driver + * + * Copyright (C) 2023 StarFive Technology Co., Ltd. + * + * This driver is about to register JH7110 PLL clock generator and support ops. + * The JH7110 have three PLL clock, PLL0, PLL1 and PLL2. + * Each PLL clocks work in integer mode or fraction mode by some dividers, + * and the configuration registers and dividers are set in several syscon registers. + * The formula for calculating frequency is: + * Fvco = Fref * (NI + NF) / M / Q1 + * Fref: OSC source clock rate + * NI: integer frequency dividing ratio of feedback divider, set by fbdiv[11:0]. + * NF: fractional frequency dividing ratio, set by frac[23:0]. NF = frac[23:0] / 2^24 = 0 ~ 0.999. + * M: frequency dividing ratio of pre-divider, set by prediv[5:0]. + * Q1: frequency dividing ratio of post divider, set by postdiv1[1:0], Q1= 1,2,4,8. + */ + +#include +#include +#include +#include +#include +#include +#include + +#include + +#include "clk-starfive-jh7110-pll.h" + +static struct jh7110_clk_pll_data *jh7110_pll_data_from(struct clk_hw *hw) +{ + return container_of(hw, struct jh7110_clk_pll_data, hw); +} + +static struct jh7110_clk_pll_priv *jh7110_pll_priv_from(struct jh7110_clk_pll_data *data) +{ + return container_of(data, struct jh7110_clk_pll_priv, data[data->idx]); +} + +/* Read register value from syscon and calculate PLL(x) frequency */ +static unsigned long jh7110_pll_get_freq(struct jh7110_clk_pll_data *data, + unsigned long parent_rate) +{ + struct jh7110_clk_pll_priv *priv = jh7110_pll_priv_from(data); + struct jh7110_pll_syscon_offset *offset = &data->offset; + struct jh7110_pll_syscon_mask *mask = &data->mask; + struct jh7110_pll_syscon_shift *shift = &data->shift; + unsigned long freq = 0; + unsigned long frac_cal; + u32 dacpd; + u32 dsmpd; + u32 fbdiv; + u32 prediv; + u32 postdiv1; + u32 frac; + u32 reg_val; + + if (regmap_read(priv->syscon_regmap, offset->dacpd, ®_val)) + goto read_error; + dacpd = (reg_val & mask->dacpd) >> shift->dacpd; + + if (regmap_read(priv->syscon_regmap, offset->dsmpd, ®_val)) + goto read_error; + dsmpd = (reg_val & mask->dsmpd) >> shift->dsmpd; + + if (regmap_read(priv->syscon_regmap, offset->fbdiv, ®_val)) + goto read_error; + fbdiv = (reg_val & mask->fbdiv) >> shift->fbdiv; + /* fbdiv value should be 8 to 4095 */ + if (fbdiv < 8) + goto read_error; + + if (regmap_read(priv->syscon_regmap, offset->prediv, ®_val)) + goto read_error; + prediv = (reg_val & mask->prediv) >> shift->prediv; + + if (regmap_read(priv->syscon_regmap, offset->postdiv1, ®_val)) + goto read_error; + /* postdiv1 = 2 ^ reg_val */ + postdiv1 = 1 << ((reg_val & mask->postdiv1) >> shift->postdiv1); + + if (regmap_read(priv->syscon_regmap, offset->frac, ®_val)) + goto read_error; + frac = (reg_val & mask->frac) >> shift->frac; + + /* + * Integer Mode (Both 1) or Fraction Mode (Both 0). + * And the decimal places are counted by expanding them by + * a factor of STARFIVE_PLL_FRAC_PATR_SIZE. + */ + if (dacpd == 1 && dsmpd == 1) + frac_cal = 0; + else if (dacpd == 0 && dsmpd == 0) + frac_cal = (unsigned long)frac * STARFIVE_PLL_FRAC_PATR_SIZE / (1 << 24); + else + goto read_error; + + /* Fvco = Fref * (NI + NF) / M / Q1 */ + freq = parent_rate / STARFIVE_PLL_FRAC_PATR_SIZE * + (fbdiv * STARFIVE_PLL_FRAC_PATR_SIZE + frac_cal) / prediv / postdiv1; + +read_error: + return freq; +} + +static unsigned long jh7110_pll_rate_sub_fabs(unsigned long rate1, unsigned long rate2) +{ + return rate1 > rate2 ? (rate1 - rate2) : (rate2 - rate1); +} + +/* Select the appropriate frequency from the already configured registers value */ +static void jh7110_pll_select_near_freq_id(struct jh7110_clk_pll_data *data, + unsigned long rate) +{ + const struct starfive_pll_syscon_value *syscon_val; + unsigned int id; + unsigned int pll_arry_size; + unsigned long rate_diff; + + if (data->idx == JH7110_CLK_PLL0_OUT) + pll_arry_size = ARRAY_SIZE(jh7110_pll0_syscon_freq); + else if (data->idx == JH7110_CLK_PLL1_OUT) + pll_arry_size = ARRAY_SIZE(jh7110_pll1_syscon_freq); + else + pll_arry_size = ARRAY_SIZE(jh7110_pll2_syscon_freq); + + /* compare the frequency one by one from small to large in order */ + for (id = 0; id < pll_arry_size; id++) { + if (data->idx == JH7110_CLK_PLL0_OUT) + syscon_val = &jh7110_pll0_syscon_freq[id]; + else if (data->idx == JH7110_CLK_PLL1_OUT) + syscon_val = &jh7110_pll1_syscon_freq[id]; + else + syscon_val = &jh7110_pll2_syscon_freq[id]; + + if (rate == syscon_val->freq) + goto match_end; + + /* select near frequency */ + if (rate < syscon_val->freq) { + /* The last frequency is closer to the target rate than this time. */ + if (id > 0) + if (rate_diff < jh7110_pll_rate_sub_fabs(rate, syscon_val->freq)) + id--; + + goto match_end; + } else { + rate_diff = jh7110_pll_rate_sub_fabs(rate, syscon_val->freq); + } + } + +match_end: + data->freq_select_idx = id; +} + +static int jh7110_pll_set_freq_syscon(struct jh7110_clk_pll_data *data) +{ + struct jh7110_clk_pll_priv *priv = jh7110_pll_priv_from(data); + struct jh7110_pll_syscon_offset *offset = &data->offset; + struct jh7110_pll_syscon_mask *mask = &data->mask; + struct jh7110_pll_syscon_shift *shift = &data->shift; + unsigned int freq_idx = data->freq_select_idx; + const struct starfive_pll_syscon_value *syscon_val; + int ret; + + if (data->idx == JH7110_CLK_PLL0_OUT) + syscon_val = &jh7110_pll0_syscon_freq[freq_idx]; + else if (data->idx == JH7110_CLK_PLL1_OUT) + syscon_val = &jh7110_pll1_syscon_freq[freq_idx]; + else + syscon_val = &jh7110_pll2_syscon_freq[freq_idx]; + + ret = regmap_update_bits(priv->syscon_regmap, offset->dacpd, mask->dacpd, + (syscon_val->dacpd << shift->dacpd)); + if (ret) + goto set_failed; + + ret = regmap_update_bits(priv->syscon_regmap, offset->dsmpd, mask->dsmpd, + (syscon_val->dsmpd << shift->dsmpd)); + if (ret) + goto set_failed; + + ret = regmap_update_bits(priv->syscon_regmap, offset->prediv, mask->prediv, + (syscon_val->prediv << shift->prediv)); + if (ret) + goto set_failed; + + ret = regmap_update_bits(priv->syscon_regmap, offset->fbdiv, mask->fbdiv, + (syscon_val->fbdiv << shift->fbdiv)); + if (ret) + goto set_failed; + + ret = regmap_update_bits(priv->syscon_regmap, offset->postdiv1, mask->postdiv1, + ((syscon_val->postdiv1 >> 1) << shift->postdiv1)); + if (ret) + goto set_failed; + + /* frac: Integer Mode (Both 1) or Fraction Mode (Both 0) */ + if (syscon_val->dacpd == 0 && syscon_val->dsmpd == 0) + ret = regmap_update_bits(priv->syscon_regmap, offset->frac, mask->frac, + (syscon_val->frac << shift->frac)); + else if (syscon_val->dacpd != syscon_val->dsmpd) + ret = -EINVAL; + +set_failed: + return ret; +} + +static unsigned long jh7110_pll_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) +{ + struct jh7110_clk_pll_data *data = jh7110_pll_data_from(hw); + + return jh7110_pll_get_freq(data, parent_rate); +} + +static int jh7110_pll_determine_rate(struct clk_hw *hw, struct clk_rate_request *req) +{ + struct jh7110_clk_pll_data *data = jh7110_pll_data_from(hw); + + jh7110_pll_select_near_freq_id(data, req->rate); + + if (data->idx == JH7110_CLK_PLL0_OUT) + req->rate = jh7110_pll0_syscon_freq[data->freq_select_idx].freq; + else if (data->idx == JH7110_CLK_PLL1_OUT) + req->rate = jh7110_pll1_syscon_freq[data->freq_select_idx].freq; + else + req->rate = jh7110_pll2_syscon_freq[data->freq_select_idx].freq; + + return 0; +} + +static int jh7110_pll_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct jh7110_clk_pll_data *data = jh7110_pll_data_from(hw); + + return jh7110_pll_set_freq_syscon(data); +} + +#ifdef CONFIG_DEBUG_FS +static void jh7110_pll_debug_init(struct clk_hw *hw, struct dentry *dentry) +{ + static const struct debugfs_reg32 jh7110_clk_pll_reg = { + .name = "CTRL", + .offset = 0, + }; + struct jh7110_clk_pll_data *data = jh7110_pll_data_from(hw); + struct jh7110_clk_pll_priv *priv = jh7110_pll_priv_from(data); + struct debugfs_regset32 *regset; + + regset = devm_kzalloc(priv->dev, sizeof(*regset), GFP_KERNEL); + if (!regset) + return; + + regset->regs = &jh7110_clk_pll_reg; + regset->nregs = 1; + + debugfs_create_regset32("registers", 0400, dentry, regset); +} +#else +#define jh7110_pll_debug_init NULL +#endif + +static const struct clk_ops jh7110_pll_ops = { + .recalc_rate = jh7110_pll_recalc_rate, + .determine_rate = jh7110_pll_determine_rate, + .set_rate = jh7110_pll_set_rate, + .debug_init = jh7110_pll_debug_init, +}; + +/* get offset, mask and shift of PLL(x) syscon */ +static int jh7110_pll_data_get(struct jh7110_clk_pll_data *data, int index) +{ + struct jh7110_pll_syscon_offset *offset = &data->offset; + struct jh7110_pll_syscon_mask *mask = &data->mask; + struct jh7110_pll_syscon_shift *shift = &data->shift; + + if (index == JH7110_CLK_PLL0_OUT) { + offset->dacpd = STARFIVE_JH7110_PLL0_DACPD_OFFSET; + offset->dsmpd = STARFIVE_JH7110_PLL0_DSMPD_OFFSET; + offset->fbdiv = STARFIVE_JH7110_PLL0_FBDIV_OFFSET; + offset->frac = STARFIVE_JH7110_PLL0_FRAC_OFFSET; + offset->prediv = STARFIVE_JH7110_PLL0_PREDIV_OFFSET; + offset->postdiv1 = STARFIVE_JH7110_PLL0_POSTDIV1_OFFSET; + + mask->dacpd = STARFIVE_JH7110_PLL0_DACPD_MASK; + mask->dsmpd = STARFIVE_JH7110_PLL0_DSMPD_MASK; + mask->fbdiv = STARFIVE_JH7110_PLL0_FBDIV_MASK; + mask->frac = STARFIVE_JH7110_PLL0_FRAC_MASK; + mask->prediv = STARFIVE_JH7110_PLL0_PREDIV_MASK; + mask->postdiv1 = STARFIVE_JH7110_PLL0_POSTDIV1_MASK; + + shift->dacpd = STARFIVE_JH7110_PLL0_DACPD_SHIFT; + shift->dsmpd = STARFIVE_JH7110_PLL0_DSMPD_SHIFT; + shift->fbdiv = STARFIVE_JH7110_PLL0_FBDIV_SHIFT; + shift->frac = STARFIVE_JH7110_PLL0_FRAC_SHIFT; + shift->prediv = STARFIVE_JH7110_PLL0_PREDIV_SHIFT; + shift->postdiv1 = STARFIVE_JH7110_PLL0_POSTDIV1_SHIFT; + + } else if (index == JH7110_CLK_PLL1_OUT) { + offset->dacpd = STARFIVE_JH7110_PLL1_DACPD_OFFSET; + offset->dsmpd = STARFIVE_JH7110_PLL1_DSMPD_OFFSET; + offset->fbdiv = STARFIVE_JH7110_PLL1_FBDIV_OFFSET; + offset->frac = STARFIVE_JH7110_PLL1_FRAC_OFFSET; + offset->prediv = STARFIVE_JH7110_PLL1_PREDIV_OFFSET; + offset->postdiv1 = STARFIVE_JH7110_PLL1_POSTDIV1_OFFSET; + + mask->dacpd = STARFIVE_JH7110_PLL1_DACPD_MASK; + mask->dsmpd = STARFIVE_JH7110_PLL1_DSMPD_MASK; + mask->fbdiv = STARFIVE_JH7110_PLL1_FBDIV_MASK; + mask->frac = STARFIVE_JH7110_PLL1_FRAC_MASK; + mask->prediv = STARFIVE_JH7110_PLL1_PREDIV_MASK; + mask->postdiv1 = STARFIVE_JH7110_PLL1_POSTDIV1_MASK; + + shift->dacpd = STARFIVE_JH7110_PLL1_DACPD_SHIFT; + shift->dsmpd = STARFIVE_JH7110_PLL1_DSMPD_SHIFT; + shift->fbdiv = STARFIVE_JH7110_PLL1_FBDIV_SHIFT; + shift->frac = STARFIVE_JH7110_PLL1_FRAC_SHIFT; + shift->prediv = STARFIVE_JH7110_PLL1_PREDIV_SHIFT; + shift->postdiv1 = STARFIVE_JH7110_PLL1_POSTDIV1_SHIFT; + + } else if (index == JH7110_CLK_PLL2_OUT) { + offset->dacpd = STARFIVE_JH7110_PLL2_DACPD_OFFSET; + offset->dsmpd = STARFIVE_JH7110_PLL2_DSMPD_OFFSET; + offset->fbdiv = STARFIVE_JH7110_PLL2_FBDIV_OFFSET; + offset->frac = STARFIVE_JH7110_PLL2_FRAC_OFFSET; + offset->prediv = STARFIVE_JH7110_PLL2_PREDIV_OFFSET; + offset->postdiv1 = STARFIVE_JH7110_PLL2_POSTDIV1_OFFSET; + + mask->dacpd = STARFIVE_JH7110_PLL2_DACPD_MASK; + mask->dsmpd = STARFIVE_JH7110_PLL2_DSMPD_MASK; + mask->fbdiv = STARFIVE_JH7110_PLL2_FBDIV_MASK; + mask->frac = STARFIVE_JH7110_PLL2_FRAC_MASK; + mask->prediv = STARFIVE_JH7110_PLL2_PREDIV_MASK; + mask->postdiv1 = STARFIVE_JH7110_PLL2_POSTDIV1_MASK; + + shift->dacpd = STARFIVE_JH7110_PLL2_DACPD_SHIFT; + shift->dsmpd = STARFIVE_JH7110_PLL2_DSMPD_SHIFT; + shift->fbdiv = STARFIVE_JH7110_PLL2_FBDIV_SHIFT; + shift->frac = STARFIVE_JH7110_PLL2_FRAC_SHIFT; + shift->prediv = STARFIVE_JH7110_PLL2_PREDIV_SHIFT; + shift->postdiv1 = STARFIVE_JH7110_PLL2_POSTDIV1_SHIFT; + + } else { + return -ENOENT; + } + + return 0; +} + +static struct clk_hw *jh7110_pll_get(struct of_phandle_args *clkspec, void *data) +{ + struct jh7110_clk_pll_priv *priv = data; + unsigned int idx = clkspec->args[0]; + + if (idx < JH7110_PLLCLK_END) + return &priv->data[idx].hw; + + return ERR_PTR(-EINVAL); +} + +static int jh7110_pll_probe(struct platform_device *pdev) +{ + const char *pll_name[JH7110_PLLCLK_END] = { + "pll0_out", + "pll1_out", + "pll2_out" + }; + struct jh7110_clk_pll_priv *priv; + struct jh7110_clk_pll_data *data; + int ret; + unsigned int idx; + + priv = devm_kzalloc(&pdev->dev, struct_size(priv, data, JH7110_PLLCLK_END), + GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->dev = &pdev->dev; + priv->syscon_regmap = syscon_node_to_regmap(priv->dev->of_node->parent); + if (IS_ERR(priv->syscon_regmap)) + return PTR_ERR(priv->syscon_regmap); + + for (idx = 0; idx < JH7110_PLLCLK_END; idx++) { + struct clk_parent_data parents = { + .index = 0, + }; + struct clk_init_data init = { + .name = pll_name[idx], + .ops = &jh7110_pll_ops, + .parent_data = &parents, + .num_parents = 1, + .flags = 0, + }; + + data = &priv->data[idx]; + + ret = jh7110_pll_data_get(data, idx); + if (ret) + return ret; + + data->hw.init = &init; + data->idx = idx; + + ret = devm_clk_hw_register(&pdev->dev, &data->hw); + if (ret) + return ret; + } + + return devm_of_clk_add_hw_provider(&pdev->dev, jh7110_pll_get, priv); +} + +static const struct of_device_id jh7110_pll_match[] = { + { .compatible = "starfive,jh7110-pll" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, jh7110_pll_match); + +static struct platform_driver jh7110_pll_driver = { + .driver = { + .name = "clk-starfive-jh7110-pll", + .of_match_table = jh7110_pll_match, + }, +}; +builtin_platform_driver_probe(jh7110_pll_driver, jh7110_pll_probe); diff --git a/drivers/clk/starfive/clk-starfive-jh7110-pll.h b/drivers/clk/starfive/clk-starfive-jh7110-pll.h new file mode 100644 index 000000000000..2cbfa9630c98 --- /dev/null +++ b/drivers/clk/starfive/clk-starfive-jh7110-pll.h @@ -0,0 +1,293 @@ +/* SPDX-License-Identifier: GPL-2.0 OR MIT */ +/* + * StarFive JH7110 PLL Clock Generator Driver + * + * Copyright (C) 2023 StarFive Technology Co., Ltd. + */ + +#ifndef _CLK_STARFIVE_JH7110_PLL_H_ +#define _CLK_STARFIVE_JH7110_PLL_H_ + +#include + +/* The decimal places are counted by expanding them by a factor of STARFIVE_PLL_FRAC_PATR_SIZE */ +#define STARFIVE_PLL_FRAC_PATR_SIZE 1000 + +#define STARFIVE_JH7110_PLL0_DACPD_OFFSET 0x18 +#define STARFIVE_JH7110_PLL0_DACPD_SHIFT 24 +#define STARFIVE_JH7110_PLL0_DACPD_MASK BIT(24) +#define STARFIVE_JH7110_PLL0_DSMPD_OFFSET 0x18 +#define STARFIVE_JH7110_PLL0_DSMPD_SHIFT 25 +#define STARFIVE_JH7110_PLL0_DSMPD_MASK BIT(25) +#define STARFIVE_JH7110_PLL0_FBDIV_OFFSET 0x1c +#define STARFIVE_JH7110_PLL0_FBDIV_SHIFT 0 +#define STARFIVE_JH7110_PLL0_FBDIV_MASK GENMASK(11, 0) +#define STARFIVE_JH7110_PLL0_FRAC_OFFSET 0x20 +#define STARFIVE_JH7110_PLL0_FRAC_SHIFT 0 +#define STARFIVE_JH7110_PLL0_FRAC_MASK GENMASK(23, 0) +#define STARFIVE_JH7110_PLL0_POSTDIV1_OFFSET 0x20 +#define STARFIVE_JH7110_PLL0_POSTDIV1_SHIFT 28 +#define STARFIVE_JH7110_PLL0_POSTDIV1_MASK GENMASK(29, 28) +#define STARFIVE_JH7110_PLL0_PREDIV_OFFSET 0x24 +#define STARFIVE_JH7110_PLL0_PREDIV_SHIFT 0 +#define STARFIVE_JH7110_PLL0_PREDIV_MASK GENMASK(5, 0) + +#define STARFIVE_JH7110_PLL1_DACPD_OFFSET 0x24 +#define STARFIVE_JH7110_PLL1_DACPD_SHIFT 15 +#define STARFIVE_JH7110_PLL1_DACPD_MASK BIT(15) +#define STARFIVE_JH7110_PLL1_DSMPD_OFFSET 0x24 +#define STARFIVE_JH7110_PLL1_DSMPD_SHIFT 16 +#define STARFIVE_JH7110_PLL1_DSMPD_MASK BIT(16) +#define STARFIVE_JH7110_PLL1_FBDIV_OFFSET 0x24 +#define STARFIVE_JH7110_PLL1_FBDIV_SHIFT 17 +#define STARFIVE_JH7110_PLL1_FBDIV_MASK GENMASK(28, 17) +#define STARFIVE_JH7110_PLL1_FRAC_OFFSET 0x28 +#define STARFIVE_JH7110_PLL1_FRAC_SHIFT 0 +#define STARFIVE_JH7110_PLL1_FRAC_MASK GENMASK(23, 0) +#define STARFIVE_JH7110_PLL1_POSTDIV1_OFFSET 0x28 +#define STARFIVE_JH7110_PLL1_POSTDIV1_SHIFT 28 +#define STARFIVE_JH7110_PLL1_POSTDIV1_MASK GENMASK(29, 28) +#define STARFIVE_JH7110_PLL1_PREDIV_OFFSET 0x2c +#define STARFIVE_JH7110_PLL1_PREDIV_SHIFT 0 +#define STARFIVE_JH7110_PLL1_PREDIV_MASK GENMASK(5, 0) + +#define STARFIVE_JH7110_PLL2_DACPD_OFFSET 0x2c +#define STARFIVE_JH7110_PLL2_DACPD_SHIFT 15 +#define STARFIVE_JH7110_PLL2_DACPD_MASK BIT(15) +#define STARFIVE_JH7110_PLL2_DSMPD_OFFSET 0x2c +#define STARFIVE_JH7110_PLL2_DSMPD_SHIFT 16 +#define STARFIVE_JH7110_PLL2_DSMPD_MASK BIT(16) +#define STARFIVE_JH7110_PLL2_FBDIV_OFFSET 0x2c +#define STARFIVE_JH7110_PLL2_FBDIV_SHIFT 17 +#define STARFIVE_JH7110_PLL2_FBDIV_MASK GENMASK(28, 17) +#define STARFIVE_JH7110_PLL2_FRAC_OFFSET 0x30 +#define STARFIVE_JH7110_PLL2_FRAC_SHIFT 0 +#define STARFIVE_JH7110_PLL2_FRAC_MASK GENMASK(23, 0) +#define STARFIVE_JH7110_PLL2_POSTDIV1_OFFSET 0x30 +#define STARFIVE_JH7110_PLL2_POSTDIV1_SHIFT 28 +#define STARFIVE_JH7110_PLL2_POSTDIV1_MASK GENMASK(29, 28) +#define STARFIVE_JH7110_PLL2_PREDIV_OFFSET 0x34 +#define STARFIVE_JH7110_PLL2_PREDIV_SHIFT 0 +#define STARFIVE_JH7110_PLL2_PREDIV_MASK GENMASK(5, 0) + +struct jh7110_pll_syscon_offset { + unsigned int dacpd; + unsigned int dsmpd; + unsigned int fbdiv; + unsigned int frac; + unsigned int prediv; + unsigned int postdiv1; +}; + +struct jh7110_pll_syscon_mask { + u32 dacpd; + u32 dsmpd; + u32 fbdiv; + u32 frac; + u32 prediv; + u32 postdiv1; +}; + +struct jh7110_pll_syscon_shift { + char dacpd; + char dsmpd; + char fbdiv; + char frac; + char prediv; + char postdiv1; +}; + +struct jh7110_clk_pll_data { + struct clk_hw hw; + unsigned int idx; + unsigned int freq_select_idx; + + struct jh7110_pll_syscon_offset offset; + struct jh7110_pll_syscon_mask mask; + struct jh7110_pll_syscon_shift shift; +}; + +struct jh7110_clk_pll_priv { + struct device *dev; + struct regmap *syscon_regmap; + struct jh7110_clk_pll_data data[]; +}; + +struct starfive_pll_syscon_value { + unsigned long freq; + u32 prediv; + u32 fbdiv; + u32 postdiv1; +/* Both daxpd and dsmpd set 1 while integer mode */ +/* Both daxpd and dsmpd set 0 while fraction mode */ + u32 dacpd; + u32 dsmpd; +/* frac value should be decimals multiplied by 2^24 */ + u32 frac; +}; + +enum starfive_pll0_freq_index { + PLL0_FREQ_375 = 0, + PLL0_FREQ_500, + PLL0_FREQ_625, + PLL0_FREQ_750, + PLL0_FREQ_875, + PLL0_FREQ_1000, + PLL0_FREQ_1250, + PLL0_FREQ_1375, + PLL0_FREQ_1500, + PLL0_FREQ_MAX +}; + +enum starfive_pll1_freq_index { + PLL1_FREQ_1066 = 0, + PLL1_FREQ_1200, + PLL1_FREQ_1400, + PLL1_FREQ_1600, + PLL1_FREQ_MAX +}; + +enum starfive_pll2_freq_index { + PLL2_FREQ_1188 = 0, + PLL2_FREQ_12288, + PLL2_FREQ_MAX +}; + +/* + * Because the pll frequency is relatively fixed, + * it cannot be set arbitrarily, so it needs a specific configuration. + * PLL0 frequency should be multiple of 125MHz (USB frequency). + */ +static const struct starfive_pll_syscon_value + jh7110_pll0_syscon_freq[PLL0_FREQ_MAX] = { + [PLL0_FREQ_375] = { + .freq = 375000000, + .prediv = 8, + .fbdiv = 125, + .postdiv1 = 1, + .dacpd = 1, + .dsmpd = 1, + }, + [PLL0_FREQ_500] = { + .freq = 500000000, + .prediv = 6, + .fbdiv = 125, + .postdiv1 = 1, + .dacpd = 1, + .dsmpd = 1, + }, + [PLL0_FREQ_625] = { + .freq = 625000000, + .prediv = 24, + .fbdiv = 625, + .postdiv1 = 1, + .dacpd = 1, + .dsmpd = 1, + }, + [PLL0_FREQ_750] = { + .freq = 750000000, + .prediv = 4, + .fbdiv = 125, + .postdiv1 = 1, + .dacpd = 1, + .dsmpd = 1, + }, + [PLL0_FREQ_875] = { + .freq = 875000000, + .prediv = 24, + .fbdiv = 875, + .postdiv1 = 1, + .dacpd = 1, + .dsmpd = 1, + }, + [PLL0_FREQ_1000] = { + .freq = 1000000000, + .prediv = 3, + .fbdiv = 125, + .postdiv1 = 1, + .dacpd = 1, + .dsmpd = 1, + }, + [PLL0_FREQ_1250] = { + .freq = 1250000000, + .prediv = 12, + .fbdiv = 625, + .postdiv1 = 1, + .dacpd = 1, + .dsmpd = 1, + }, + [PLL0_FREQ_1375] = { + .freq = 1375000000, + .prediv = 24, + .fbdiv = 1375, + .postdiv1 = 1, + .dacpd = 1, + .dsmpd = 1, + }, + [PLL0_FREQ_1500] = { + .freq = 1500000000, + .prediv = 2, + .fbdiv = 125, + .postdiv1 = 1, + .dacpd = 1, + .dsmpd = 1, + }, +}; + +static const struct starfive_pll_syscon_value + jh7110_pll1_syscon_freq[PLL1_FREQ_MAX] = { + [PLL1_FREQ_1066] = { + .freq = 1066000000, + .prediv = 12, + .fbdiv = 533, + .postdiv1 = 1, + .dacpd = 1, + .dsmpd = 1, + }, + [PLL1_FREQ_1200] = { + .freq = 1200000000, + .prediv = 1, + .fbdiv = 50, + .postdiv1 = 1, + .dacpd = 1, + .dsmpd = 1, + }, + [PLL1_FREQ_1400] = { + .freq = 1400000000, + .prediv = 6, + .fbdiv = 350, + .postdiv1 = 1, + .dacpd = 1, + .dsmpd = 1, + }, + [PLL1_FREQ_1600] = { + .freq = 1600000000, + .prediv = 3, + .fbdiv = 200, + .postdiv1 = 1, + .dacpd = 1, + .dsmpd = 1, + }, +}; + +static const struct starfive_pll_syscon_value + jh7110_pll2_syscon_freq[PLL2_FREQ_MAX] = { + [PLL2_FREQ_1188] = { + .freq = 1188000000, + .prediv = 2, + .fbdiv = 99, + .postdiv1 = 1, + .dacpd = 1, + .dsmpd = 1, + }, + [PLL2_FREQ_12288] = { + .freq = 1228800000, + .prediv = 5, + .fbdiv = 256, + .postdiv1 = 1, + .dacpd = 1, + .dsmpd = 1, + }, +}; + +#endif