From patchwork Wed Oct 19 03:51:16 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinbo Zhu X-Patchwork-Id: 13011341 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EDC38C43217 for ; Wed, 19 Oct 2022 03:51:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229742AbiJSDvk (ORCPT ); Tue, 18 Oct 2022 23:51:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49410 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229597AbiJSDvj (ORCPT ); Tue, 18 Oct 2022 23:51:39 -0400 Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 80D08D77F6; Tue, 18 Oct 2022 20:51:36 -0700 (PDT) Received: from loongson.cn (unknown [10.180.13.64]) by gateway (Coremail) with SMTP id _____8CxjdpHdE9jJqEAAA--.3469S3; Wed, 19 Oct 2022 11:51:35 +0800 (CST) Received: from localhost.localdomain (unknown [10.180.13.64]) by localhost.localdomain (Coremail) with SMTP id AQAAf8Bxj+A+dE9j4hcBAA--.4371S3; Wed, 19 Oct 2022 11:51:34 +0800 (CST) From: Yinbo Zhu To: Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Huacai Chen , WANG Xuerui , Jiaxun Yang , Jianmin Lv , Yang Li , linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, Yinbo Zhu Subject: [PATCH v2 2/3] clk: clk-loongson2: add clock controller driver support Date: Wed, 19 Oct 2022 11:51:16 +0800 Message-Id: <20221019035117.29352-2-zhuyinbo@loongson.cn> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20221019035117.29352-1-zhuyinbo@loongson.cn> References: <20221019035117.29352-1-zhuyinbo@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8Bxj+A+dE9j4hcBAA--.4371S3 X-CM-SenderInfo: 52kx5xhqerqz5rrqw2lrqou0/ X-Coremail-Antispam: 1Uk129KBjvJXoW3CFy8Gr47GryDCryfCF18uFg_yoWkWFyDpF yfA3y5WrWjqF4UuwsxtryDGrn8AasFk3W7AFW3Ga4qkrZ7Xa4rWr4xAFyxAF4UA3ykAFW2 vFZYgrWUCF45XwUanT9S1TB71UUUUjDqnTZGkaVYY2UrUUUUj1kv1TuYvTs0mT0YCTnIWj qI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUIcSsGvfJTRUUU bfkFc2x0x2IEx4CE42xK8VAvwI8IcIk0rVWrJVCq3wAFIxvE14AKwVWUXVWUAwA2ocxC64 kIII0Yj41l84x0c7CEw4AK67xGY2AK021l84ACjcxK6xIIjxv20xvE14v26ryj6F1UM28E F7xvwVC0I7IYx2IY6xkF7I0E14v26r4j6F4UM28EF7xvwVC2z280aVAFwI0_Gr1j6F4UJw A2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_Gr1j6F4UJwAaw2AFwI0_JF0_Jw1le2I262IYc4CY 6c8Ij28IcVAaY2xG8wAqjxCEc2xF0cIa020Ex4CE44I27wAqx4xG64xvF2IEw4CE5I8CrV C2j2WlYx0E2Ix0cI8IcVAFwI0_Jw0_WrylYx0Ex4A2jsIE14v26r4j6F4UMcvjeVCFs4IE 7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwCY1x0262kKe7AKxVWUAVWUtwCF04k20xvY0x 0EwIxGrwCF04k20xvE74AGY7Cv6cx26rWl4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1l4IxYO2xF xVAFwI0_JF0_Jw1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWw C2zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Gr0_ Xr1lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJV WUCwCI42IY6I8E87Iv67AKxVW8JVWxJwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIY CTnIWIevJa73UjIFyTuYvjxUc9mRUUUUU Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org This driver provides support for clock controller on Loongson2 SoC , the Loongson2 SoC uses a 100MHz clock as the PLL reference clock , there are five independent PLLs inside, each of which PLL can provide up to three sets of frequency dependent clock outputs. Signed-off-by: Yinbo Zhu --- Change in v2: 1. Update the include filename. 2. Change string from refclk/REFCLK to ref/REF. MAINTAINERS | 1 + arch/loongarch/Kconfig | 1 + arch/loongarch/kernel/time.c | 2 + drivers/clk/Kconfig | 9 ++ drivers/clk/Makefile | 1 + drivers/clk/clk-loongson2.c | 285 +++++++++++++++++++++++++++++++++++ 6 files changed, 299 insertions(+) create mode 100644 drivers/clk/clk-loongson2.c diff --git a/MAINTAINERS b/MAINTAINERS index 401176784853..a4de8f1b81f0 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11918,6 +11918,7 @@ LOONGSON2 SOC SERIES CLOCK DRIVER M: Yinbo Zhu L: linux-clk@vger.kernel.org S: Maintained +F: drivers/clk/clk-loongson2.c F: include/dt-bindings/clock/loongson,ls2k-clk.h LSILOGIC MPT FUSION DRIVERS (FC/SAS/SPI) diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index 26aeb1408e56..8b65f349cd6e 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -122,6 +122,7 @@ config LOONGARCH select USE_PERCPU_NUMA_NODE_ID select USER_STACKTRACE_SUPPORT select ZONE_DMA32 + select COMMON_CLK config 32BIT bool diff --git a/arch/loongarch/kernel/time.c b/arch/loongarch/kernel/time.c index 74f34c74679a..0d8b37763086 100644 --- a/arch/loongarch/kernel/time.c +++ b/arch/loongarch/kernel/time.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include @@ -214,6 +215,7 @@ int __init constant_clocksource_init(void) void __init time_init(void) { + of_clk_init(NULL); #ifdef CONFIG_TIMER_PROBE timer_probe(); #endif diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index 48f8f4221e21..88620f86373f 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -428,6 +428,15 @@ config COMMON_CLK_K210 help Support for the Canaan Kendryte K210 RISC-V SoC clocks. +config COMMON_CLK_LOONGSON2 + bool "Clock driver for Loongson2 SoC" + depends on COMMON_CLK && OF + help + This driver provides support for Clock Controller that base on + Common Clock Framework Controller (CCF) on Loongson2 SoC. The + Clock Controller can generates and supplies clock to various + peripherals within the SoC. + source "drivers/clk/actions/Kconfig" source "drivers/clk/analogbits/Kconfig" source "drivers/clk/baikal-t1/Kconfig" diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index d5db170d38d2..8ccc7436052f 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -75,6 +75,7 @@ obj-$(CONFIG_COMMON_CLK_RS9_PCIE) += clk-renesas-pcie.o obj-$(CONFIG_COMMON_CLK_VC5) += clk-versaclock5.o obj-$(CONFIG_COMMON_CLK_WM831X) += clk-wm831x.o obj-$(CONFIG_COMMON_CLK_XGENE) += clk-xgene.o +obj-$(CONFIG_COMMON_CLK_LOONGSON2) += clk-loongson2.o # please keep this section sorted lexicographically by directory path name obj-y += actions/ diff --git a/drivers/clk/clk-loongson2.c b/drivers/clk/clk-loongson2.c new file mode 100644 index 000000000000..9b753821052c --- /dev/null +++ b/drivers/clk/clk-loongson2.c @@ -0,0 +1,285 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Author: Yinbo Zhu + * Copyright (C) 2022-2023 Loongson Technology Corporation Limited + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define LOONGSON2_PLL_MULT_SHIFT 32 +#define LOONGSON2_PLL_MULT_WIDTH 10 +#define LOONGSON2_PLL_DIV_SHIFT 26 +#define LOONGSON2_PLL_DIV_WIDTH 6 +#define LOONGSON2_APB_FREQSCALE_SHIFT 20 +#define LOONGSON2_APB_FREQSCALE_WIDTH 3 +#define LOONGSON2_USB_FREQSCALE_SHIFT 16 +#define LOONGSON2_USB_FREQSCALE_WIDTH 3 +#define LOONGSON2_SATA_FREQSCALE_SHIFT 12 +#define LOONGSON2_SATA_FREQSCALE_WIDTH 3 + +void __iomem *loongson2_pll_base; +static DEFINE_SPINLOCK(loongson2_clk_lock); +static struct clk_hw **hws; +static struct clk_hw_onecell_data *clk_hw_data; + +static struct clk_hw *loongson2_clk_register(struct device *dev, + const char *name, + const char *parent_name, + const struct clk_ops *ops, + unsigned long flags) +{ + int ret; + struct clk_hw *hw; + struct clk_init_data init; + + /* allocate the divider */ + hw = kzalloc(sizeof(*hw), GFP_KERNEL); + if (!hw) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = ops; + init.flags = flags | CLK_IS_BASIC; + init.parent_names = (parent_name ? &parent_name : NULL); + init.num_parents = (parent_name ? 1 : 0); + hw->init = &init; + + /* register the clock */ + ret = clk_hw_register(dev, hw); + if (ret) { + kfree(hw); + hw = ERR_PTR(ret); + } + + return hw; +} + +static struct clk_hw *loongson2_clk_pll_register(const char *name, + const char *parent, void __iomem *reg) +{ + u64 val; + u32 mult = 1, div = 1; + + val = readq((void *)reg); + + mult = (val >> LOONGSON2_PLL_MULT_SHIFT) & + clk_div_mask(LOONGSON2_PLL_MULT_WIDTH); + div = (val >> LOONGSON2_PLL_DIV_SHIFT) & + clk_div_mask(LOONGSON2_PLL_DIV_WIDTH); + + return clk_hw_register_fixed_factor(NULL, name, parent, + CLK_SET_RATE_PARENT, mult, div); +} + +static unsigned long loongson2_apb_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + u64 val; + u32 mult; + unsigned long rate; + + val = readq((void *)(loongson2_pll_base + 0x50)); + + mult = (val >> LOONGSON2_APB_FREQSCALE_SHIFT) & + clk_div_mask(LOONGSON2_APB_FREQSCALE_WIDTH); + + rate = parent_rate * (mult + 1); + do_div(rate, 8); + + return rate; +} + +static const struct clk_ops loongson2_apb_clk_ops = { + .recalc_rate = loongson2_apb_recalc_rate, +}; + +static unsigned long loongson2_usb_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + u64 val; + u32 mult; + unsigned long rate; + + val = readq((void *)(loongson2_pll_base + 0x50)); + + mult = (val >> LOONGSON2_USB_FREQSCALE_SHIFT) & + clk_div_mask(LOONGSON2_USB_FREQSCALE_WIDTH); + + rate = parent_rate * (mult + 1); + do_div(rate, 8); + + return rate; +} + +static const struct clk_ops loongson2_usb_clk_ops = { + .recalc_rate = loongson2_usb_recalc_rate, +}; + +static unsigned long loongson2_sata_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + u64 val; + u32 mult; + unsigned long rate; + + val = readq((void *)(loongson2_pll_base + 0x50)); + + mult = (val >> LOONGSON2_SATA_FREQSCALE_SHIFT) & + clk_div_mask(LOONGSON2_SATA_FREQSCALE_WIDTH); + + rate = parent_rate * (mult + 1); + do_div(rate, 8); + + return rate; +} + +static const struct clk_ops loongson2_sata_clk_ops = { + .recalc_rate = loongson2_sata_recalc_rate, +}; + +static void loongson2_check_clk_hws(struct clk_hw *clks[], unsigned int count) +{ + unsigned int i; + + for (i = 0; i < count; i++) + if (IS_ERR(clks[i])) + pr_err("Loongson2 clk %u: register failed with %ld\n" + , i, PTR_ERR(clks[i])); +} + +static struct clk_hw *loongson2_obtain_fixed_clk_hw( + struct device_node *np, + const char *name) +{ + struct clk *clk; + + clk = of_clk_get_by_name(np, name); + if (IS_ERR(clk)) + return ERR_PTR(-ENOENT); + + return __clk_get_hw(clk); +} + +static void __init loongson2_clocks_init(struct device_node *np) +{ + loongson2_pll_base = of_iomap(np, 0); + + if (!loongson2_pll_base) { + pr_err("clk: unable to map loongson2 clk registers\n"); + goto err; + } + + clk_hw_data = kzalloc(struct_size(clk_hw_data, hws, LOONGSON2_CLK_END), + GFP_KERNEL); + if (WARN_ON(!clk_hw_data)) + goto err; + + clk_hw_data->num = LOONGSON2_CLK_END; + hws = clk_hw_data->hws; + + hws[LOONGSON2_REF_100M] = loongson2_obtain_fixed_clk_hw(np, + "ref_100m"); + + hws[LOONGSON2_NODE_PLL] = loongson2_clk_pll_register("node_pll_clk", + "ref_100m", + loongson2_pll_base); + + hws[LOONGSON2_DDR_PLL] = loongson2_clk_pll_register("ddr_pll_clk", + "ref_100m", + loongson2_pll_base + 0x10); + + hws[LOONGSON2_DC_PLL] = loongson2_clk_pll_register("dc_pll_clk", + "ref_100m", + loongson2_pll_base + 0x20); + + hws[LOONGSON2_PIX0_PLL] = loongson2_clk_pll_register("pix0_pll_clk", + "ref_100m", + loongson2_pll_base + 0x30); + + hws[LOONGSON2_PIX1_PLL] = loongson2_clk_pll_register("pix1_pll_clk", + "ref_100m", + loongson2_pll_base + 0x40); + + hws[LOONGSON2_NODE_CLK] = clk_hw_register_divider(NULL, "node_clk", + "node_pll_clk", 0, + loongson2_pll_base + 0x8, 0, + 6, CLK_DIVIDER_ONE_BASED, + &loongson2_clk_lock); + + /* + * The hda_clk divisor in the upper 32bits and the clk-prodiver + * layer code doesn't support 64bit io operation thus a conversion + * is required that subtract shift by 32 and add 4byte to the hda + * address + */ + hws[LOONGSON2_HDA_CLK] = clk_hw_register_divider(NULL, "hda_clk", + "ddr_pll_clk", 0, + loongson2_pll_base + 0x22, 12, + 7, CLK_DIVIDER_ONE_BASED, + &loongson2_clk_lock); + + hws[LOONGSON2_GPU_CLK] = clk_hw_register_divider(NULL, "gpu_clk", + "ddr_pll_clk", 0, + loongson2_pll_base + 0x18, 22, + 6, CLK_DIVIDER_ONE_BASED, + &loongson2_clk_lock); + + hws[LOONGSON2_DDR_CLK] = clk_hw_register_divider(NULL, "ddr_clk", + "ddr_pll_clk", 0, + loongson2_pll_base + 0x18, 0, + 6, CLK_DIVIDER_ONE_BASED, + &loongson2_clk_lock); + + hws[LOONGSON2_GMAC_CLK] = clk_hw_register_divider(NULL, "gmac_clk", + "dc_pll_clk", 0, + loongson2_pll_base + 0x28, 22, + 6, CLK_DIVIDER_ONE_BASED, + &loongson2_clk_lock); + + hws[LOONGSON2_DC_CLK] = clk_hw_register_divider(NULL, "dc_clk", + "dc_pll_clk", 0, + loongson2_pll_base + 0x28, 0, + 6, CLK_DIVIDER_ONE_BASED, + &loongson2_clk_lock); + + hws[LOONGSON2_APB_CLK] = loongson2_clk_register(NULL, "apb_clk", + "gmac_clk", + &loongson2_apb_clk_ops, 0); + + hws[LOONGSON2_USB_CLK] = loongson2_clk_register(NULL, "usb_clk", + "gmac_clk", + &loongson2_usb_clk_ops, 0); + + hws[LOONGSON2_SATA_CLK] = loongson2_clk_register(NULL, "sata_clk", + "gmac_clk", + &loongson2_sata_clk_ops, 0); + + hws[LOONGSON2_PIX0_CLK] = clk_hw_register_divider(NULL, "pix0_clk", + "pix0_pll_clk", 0, + loongson2_pll_base + 0x38, 0, 6, + CLK_DIVIDER_ONE_BASED, + &loongson2_clk_lock); + + hws[LOONGSON2_PIX1_CLK] = clk_hw_register_divider(NULL, "pix1_clk", + "pix1_pll_clk", 0, + loongson2_pll_base + 0x48, 0, 6, + CLK_DIVIDER_ONE_BASED, + &loongson2_clk_lock); + + loongson2_check_clk_hws(hws, LOONGSON2_CLK_END); + + of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_hw_data); + +err: + iounmap(loongson2_pll_base); +} + +CLK_OF_DECLARE(loongson2_clk, "loongson,ls2k-clk", loongson2_clocks_init);