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[2620:137:e000::1:20]) by mx.google.com with ESMTP id g4-20020a170902934400b0019a8fe30321si11886133plp.208.2023.03.07.04.11.13; Tue, 07 Mar 2023 04:11:27 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231273AbjCGLvr (ORCPT + 99 others); Tue, 7 Mar 2023 06:51:47 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54788 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231415AbjCGLvX (ORCPT ); Tue, 7 Mar 2023 06:51:23 -0500 Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id D27CF32E55; Tue, 7 Mar 2023 03:50:29 -0800 (PST) Received: from loongson.cn (unknown [10.20.42.35]) by gateway (Coremail) with SMTP id _____8AxUU8EJQdko1gJAA--.362S3; Tue, 07 Mar 2023 19:50:28 +0800 (CST) Received: from user-pc.202.106.0.20 (unknown [10.20.42.35]) by localhost.localdomain (Coremail) with SMTP id AQAAf8AxHuT+JAdk6f9NAA--.33988S3; Tue, 07 Mar 2023 19:50:27 +0800 (CST) From: Yinbo Zhu To: Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org Cc: Jianmin Lv , Liu Peibao , wanghongliang@loongson.cn, loongson-kernel@lists.loongnix.cn, Yinbo Zhu Subject: [PATCH v13 2/2] clk: clk-loongson2: add clock controller driver support Date: Tue, 7 Mar 2023 19:50:22 +0800 Message-Id: <20230307115022.12846-2-zhuyinbo@loongson.cn> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20230307115022.12846-1-zhuyinbo@loongson.cn> References: <20230307115022.12846-1-zhuyinbo@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8AxHuT+JAdk6f9NAA--.33988S3 X-CM-SenderInfo: 52kx5xhqerqz5rrqw2lrqou0/ X-Coremail-Antispam: 1Uk129KBjvAXoW3Kr45Wr1xGF4rGFy5Gr18uFg_yoW8GrWDWo W3uFn8Jr4fJ348XFWIvw15tr47XFsxZFsIyF1fArn8GayY9r98XrW8A3W3GFn7ZFyrKFnx AryFgayrJF4Iqr47n29KB7ZKAUJUUUU7529EdanIXcx71UUUUU7KY7ZEXasCq-sGcSsGvf J3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnRJU UUBj1xkIjI8I6I8E6xAIw20EY4v20xvaj40_Wr0E3s1l1IIY67AEw4v_Jrv_JF1l8cAvFV AK0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVW8JVW5JwA2 z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVW8JVWxJwA2z4x0Y4vEx4A2jsIE14v26F4UJVW0ow A2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_Cr1j6rxdM2kKe7AKxVWUXVWUAwAS0I0E0xvYzxvE 52x082IY62kv0487Mc804VCY07AIYIkI8VC2zVCFFI0UMc02F40EFcxC0VAKzVAqx4xG6I 80ewAv7VC0I7IYx2IY67AKxVWUtVWrXwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCj c4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JMxkF7I0En4kS14v26r126r1DMxAIw28IcxkI7V AKI48JMxAIw28IcVCjz48v1sIEY20_WwCFx2IqxVCFs4IE7xkEbVWUJVW8JwCFI7km07C2 67AKxVWUXVWUAwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI 8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUCVW8 JwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r 1xMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBI daVFxhVjvjDU0xZFpf9x07jeksgUUUUU= X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_PASS, SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1759710897875261886?= X-GMAIL-MSGID: =?utf-8?q?1759710897875261886?= This driver provides support for clock controller on Loongson-2 SoC, the Loongson-2 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 v13: 1. Add the Loongson-2 boot clk support. Change in v12: 1. Change driver register way that use platform driver register. Change in v11: 1. Remove the repetitive COMMON_CLK config in loongarch Kconfig. 2. Fixup the help paragraph descprition in COMMON_CLK_LOONGSON2. 3. Drop the . 4. Drop the cast in clock driver. 5. Use div_u64() replace do_div(). 6. Inline this function for loongson2_check_clk_hws. 7. Fixup the comma deposition on the loongson2_check_clk_hws. 8. Drop the loongson2_obtain_fixed_clk_hw and rework this driver use clk_parent_data and the 'fw_name'. Change in v10: 1. Detach of_clk_init to another patch. Change in v9: 1. Add all history changelog information. Change in v8: 1. Remove the flag "CLK_IS_BASIC". Change in v7: 1. Adjust position alphabetically in Kconfig and Makefile. 2. Add static for loongson2_pll_base. 3. Move other file-scope variables in probe. Change in v6: 1. NO change, but other patch in this series of patches has changes. Change in v5: 1. Replace loongson2 with Loongson-2 in commit info. 2. Replace Loongson2 with Loongson-2 in binding and Kconfig file. 3. Replace soc with SoC. Change in v4: 1. Fixup clock-names that replace "xxx-clk" with "xxx". Change in v3: 1. NO change, but other patch in this series of patches has changes. Change in v2: 1. Update the include filename. 2. Change string from refclk/REFCLK to ref/REF. MAINTAINERS | 1 + drivers/clk/Kconfig | 9 + drivers/clk/Makefile | 1 + drivers/clk/clk-loongson2.c | 355 ++++++++++++++++++++++++++++++++++++ 4 files changed, 366 insertions(+) create mode 100644 drivers/clk/clk-loongson2.c diff --git a/MAINTAINERS b/MAINTAINERS index 8d5bc223f3053..2334623052875 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12121,6 +12121,7 @@ M: Yinbo Zhu L: linux-clk@vger.kernel.org S: Maintained F: Documentation/devicetree/bindings/clock/loongson,ls2k-clk.yaml +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/drivers/clk/Kconfig b/drivers/clk/Kconfig index b6c5bf69a2b2c..27c5fa02916a6 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -325,6 +325,15 @@ config COMMON_CLK_LOCHNAGAR This driver supports the clocking features of the Cirrus Logic Lochnagar audio development board. +config COMMON_CLK_LOONGSON2 + bool "Clock driver for Loongson-2 SoC" + depends on COMMON_CLK && OF + help + This driver provides support for clock controller on Loongson-2 SoC. + The clock controller can generates and supplies clock to various + peripherals within the SoC. + Say Y here to support Loongson-2 SoC clock driver. + config COMMON_CLK_NXP def_bool COMMON_CLK && (ARCH_LPC18XX || ARCH_LPC32XX) select REGMAP_MMIO if ARCH_LPC32XX diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index e3ca0d058a256..b298c5dabc1a4 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -43,6 +43,7 @@ obj-$(CONFIG_COMMON_CLK_K210) += clk-k210.o obj-$(CONFIG_LMK04832) += clk-lmk04832.o obj-$(CONFIG_COMMON_CLK_LAN966X) += clk-lan966x.o obj-$(CONFIG_COMMON_CLK_LOCHNAGAR) += clk-lochnagar.o +obj-$(CONFIG_COMMON_CLK_LOONGSON2) += clk-loongson2.o obj-$(CONFIG_COMMON_CLK_MAX77686) += clk-max77686.o obj-$(CONFIG_COMMON_CLK_MAX9485) += clk-max9485.o obj-$(CONFIG_ARCH_MILBEAUT_M10V) += clk-milbeaut.o diff --git a/drivers/clk/clk-loongson2.c b/drivers/clk/clk-loongson2.c new file mode 100644 index 0000000000000..c24334b19ea70 --- /dev/null +++ b/drivers/clk/clk-loongson2.c @@ -0,0 +1,355 @@ +// 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 +#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 +#define LOONGSON2_BOOT_FREQSCALE_SHIFT 8 +#define LOONGSON2_BOOT_FREQSCALE_WIDTH 3 + +static void __iomem *loongson2_pll_base; + +static const struct clk_parent_data pdata[] = { + { .fw_name = "ref_100m", .name = "ref_clk", }, +}; + +static struct clk_hw *loongson2_clk_register(struct device_node *np, + 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; + init.num_parents = 1; + + if (!parent_name) + init.parent_data = pdata; + else + init.parent_names = &parent_name; + + hw->init = &init; + + /* register the clock */ + ret = of_clk_hw_register(np, hw); + if (ret) { + kfree(hw); + hw = ERR_PTR(ret); + } + + return hw; +} + +static unsigned long loongson2_calc_pll_rate(int offset, unsigned long rate) +{ + u64 val; + u32 mult = 1, div = 1; + + val = readq(loongson2_pll_base + offset); + + 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 div_u64((u64)rate * mult, div); +} + +static unsigned long loongson2_node_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + return loongson2_calc_pll_rate(0x0, parent_rate); +} + +static const struct clk_ops loongson2_node_clk_ops = { + .recalc_rate = loongson2_node_recalc_rate, +}; + +static unsigned long loongson2_ddr_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + return loongson2_calc_pll_rate(0x10, parent_rate); +} + +static const struct clk_ops loongson2_ddr_clk_ops = { + .recalc_rate = loongson2_ddr_recalc_rate, +}; + +static unsigned long loongson2_dc_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + return loongson2_calc_pll_rate(0x20, parent_rate); +} + +static const struct clk_ops loongson2_dc_clk_ops = { + .recalc_rate = loongson2_dc_recalc_rate, +}; + +static unsigned long loongson2_pix0_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + return loongson2_calc_pll_rate(0x30, parent_rate); +} + +static const struct clk_ops loongson2_pix0_clk_ops = { + .recalc_rate = loongson2_pix0_recalc_rate, +}; + +static unsigned long loongson2_pix1_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + return loongson2_calc_pll_rate(0x40, parent_rate); +} + +static const struct clk_ops loongson2_pix1_clk_ops = { + .recalc_rate = loongson2_pix1_recalc_rate, +}; + +static unsigned long loongson2_calc_rate(unsigned long rate, + int shift, int width) +{ + u64 val; + u32 mult; + + val = readq(loongson2_pll_base + 0x50); + + mult = (val >> shift) & clk_div_mask(width); + + return div_u64((u64)rate * (mult + 1), 8); +} + +static unsigned long loongson2_boot_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + return loongson2_calc_rate(parent_rate, + LOONGSON2_BOOT_FREQSCALE_SHIFT, + LOONGSON2_BOOT_FREQSCALE_WIDTH); +} + +static const struct clk_ops loongson2_boot_clk_ops = { + .recalc_rate = loongson2_boot_recalc_rate, +}; + +static unsigned long loongson2_apb_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + return loongson2_calc_rate(parent_rate, + LOONGSON2_APB_FREQSCALE_SHIFT, + LOONGSON2_APB_FREQSCALE_WIDTH); +} + +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) +{ + return loongson2_calc_rate(parent_rate, + LOONGSON2_USB_FREQSCALE_SHIFT, + LOONGSON2_USB_FREQSCALE_WIDTH); +} + +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) +{ + return loongson2_calc_rate(parent_rate, + LOONGSON2_SATA_FREQSCALE_SHIFT, + LOONGSON2_SATA_FREQSCALE_WIDTH); +} + +static const struct clk_ops loongson2_sata_clk_ops = { + .recalc_rate = loongson2_sata_recalc_rate, +}; + +static inline 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 void loongson2_clocks_init(struct device_node *np) +{ + struct clk_hw **hws; + struct clk_hw_onecell_data *clk_hw_data; + spinlock_t loongson2_clk_lock; + + loongson2_pll_base = of_iomap(np, 0); + + if (!loongson2_pll_base) { + pr_err("clk: unable to map loongson2 clk registers\n"); + return; + } + + 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_NODE_PLL] = loongson2_clk_register(np, "node_pll", + NULL, + &loongson2_node_clk_ops, 0); + + hws[LOONGSON2_DDR_PLL] = loongson2_clk_register(np, "ddr_pll", + NULL, + &loongson2_ddr_clk_ops, 0); + + hws[LOONGSON2_DC_PLL] = loongson2_clk_register(np, "dc_pll", + NULL, + &loongson2_dc_clk_ops, 0); + + hws[LOONGSON2_PIX0_PLL] = loongson2_clk_register(np, "pix0_pll", + NULL, + &loongson2_pix0_clk_ops, 0); + + hws[LOONGSON2_PIX1_PLL] = loongson2_clk_register(np, "pix1_pll", + NULL, + &loongson2_pix1_clk_ops, 0); + + hws[LOONGSON2_BOOT_CLK] = loongson2_clk_register(np, "boot", + NULL, + &loongson2_boot_clk_ops, 0); + + hws[LOONGSON2_NODE_CLK] = clk_hw_register_divider(NULL, "node", + "node_pll", 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", + "ddr_pll", 0, + loongson2_pll_base + 0x22, 12, + 7, CLK_DIVIDER_ONE_BASED, + &loongson2_clk_lock); + + hws[LOONGSON2_GPU_CLK] = clk_hw_register_divider(NULL, "gpu", + "ddr_pll", 0, + loongson2_pll_base + 0x18, 22, + 6, CLK_DIVIDER_ONE_BASED, + &loongson2_clk_lock); + + hws[LOONGSON2_DDR_CLK] = clk_hw_register_divider(NULL, "ddr", + "ddr_pll", 0, + loongson2_pll_base + 0x18, 0, + 6, CLK_DIVIDER_ONE_BASED, + &loongson2_clk_lock); + + hws[LOONGSON2_GMAC_CLK] = clk_hw_register_divider(NULL, "gmac", + "dc_pll", 0, + loongson2_pll_base + 0x28, 22, + 6, CLK_DIVIDER_ONE_BASED, + &loongson2_clk_lock); + + hws[LOONGSON2_DC_CLK] = clk_hw_register_divider(NULL, "dc", + "dc_pll", 0, + loongson2_pll_base + 0x28, 0, + 6, CLK_DIVIDER_ONE_BASED, + &loongson2_clk_lock); + + hws[LOONGSON2_APB_CLK] = loongson2_clk_register(NULL, "apb", + "gmac", + &loongson2_apb_clk_ops, 0); + + hws[LOONGSON2_USB_CLK] = loongson2_clk_register(NULL, "usb", + "gmac", + &loongson2_usb_clk_ops, 0); + + hws[LOONGSON2_SATA_CLK] = loongson2_clk_register(NULL, "sata", + "gmac", + &loongson2_sata_clk_ops, 0); + + hws[LOONGSON2_PIX0_CLK] = clk_hw_register_divider(NULL, "pix0", + "pix0_pll", 0, + loongson2_pll_base + 0x38, 0, 6, + CLK_DIVIDER_ONE_BASED, + &loongson2_clk_lock); + + hws[LOONGSON2_PIX1_CLK] = clk_hw_register_divider(NULL, "pix1", + "pix1_pll", 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); +} + +static const struct of_device_id loongson2_clk_match_table[] = { + { .compatible = "loongson,ls2k-clk" }, + { } +}; +MODULE_DEVICE_TABLE(of, loongson2_clk_match_table); + +static int loongson2_clk_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + + loongson2_clocks_init(np); + + return 0; +} + +static struct platform_driver loongson2_clk_driver = { + .probe = loongson2_clk_probe, + .driver = { + .name = "loongson2-clk", + .of_match_table = loongson2_clk_match_table, + }, +}; +module_platform_driver(loongson2_clk_driver); + +MODULE_DESCRIPTION("Loongson2 clock driver"); +MODULE_LICENSE("GPL");