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[146.115.144.188]) by smtp.gmail.com with ESMTPSA id e15sm2145647qtq.83.2022.01.06.13.22.43 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 06 Jan 2022 13:22:45 -0800 (PST) Message-ID: Date: Thu, 6 Jan 2022 16:22:40 -0500 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.4.0 Subject: Re: [PATCH v7 5/7] clk: imx: Add initial support for i.MXRT1050 clock driver Content-Language: en-US To: Stephen Boyd , linux-imx@nxp.com Cc: mturquette@baylibre.com, robh+dt@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, ulf.hansson@linaro.org, aisheng.dong@nxp.com, stefan@agner.ch, linus.walleij@linaro.org, gregkh@linuxfoundation.org, arnd@arndb.de, olof@lixom.net, soc@kernel.org, linux@armlinux.org.uk, abel.vesa@nxp.com, adrian.hunter@intel.com, jirislaby@kernel.org, giulio.benetti@benettiengineering.com, nobuhiro1.iwamatsu@toshiba.co.jp, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, linux-gpio@vger.kernel.org, linux-serial@vger.kernel.org References: <20220103233948.198119-1-Mr.Bossman075@gmail.com> <20220103233948.198119-6-Mr.Bossman075@gmail.com> <20220105235157.8ED80C36AEB@smtp.kernel.org> From: Jesse Taube In-Reply-To: <20220105235157.8ED80C36AEB@smtp.kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 1/5/22 18:51, Stephen Boyd wrote: > Quoting Jesse Taube (2022-01-03 15:39:46) >> Add clock driver support for i.MXRT1050. >> >> Signed-off-by: Jesse Taube >> Suggested-by: Giulio Benetti > > What is suggested by for a new driver? Uh as far is im aware sugessed by means that he gave the idea/insight for this driver. Basicly he gave me tips on what to do and how i would look into porting this soc. I asked him how he should be given credit this was agreed on. https://www.kernel.org/doc/html/latest/process/submitting-patches.html#using-reported-by-tested-by-reviewed-by-suggested-by-and-fixes > >> --- >> diff --git a/drivers/clk/imx/Kconfig b/drivers/clk/imx/Kconfig >> --- a/drivers/clk/imx/Kconfig >> +++ b/drivers/clk/imx/Kconfig >> @@ -105,3 +105,8 @@ config CLK_IMX8ULP >> select MXC_CLK >> help >> Build the driver for i.MX8ULP CCM Clock Driver >> + >> +config CLK_IMXRT1050 >> + bool "IMXRT1050 CCM Clock Driver" >> + depends on SOC_IMXRT >> + select MXC_CLK > > Please add some help text here. > Will do. >> diff --git a/drivers/clk/imx/Makefile b/drivers/clk/imx/Makefile >> index b5e040026dfb..3d9a1e3b5fc6 100644 >> --- a/drivers/clk/imx/Makefile >> +++ b/drivers/clk/imx/Makefile >> @@ -47,3 +47,4 @@ obj-$(CONFIG_CLK_IMX6UL) += clk-imx6ul.o >> obj-$(CONFIG_CLK_IMX7D) += clk-imx7d.o >> obj-$(CONFIG_CLK_IMX7ULP) += clk-imx7ulp.o >> obj-$(CONFIG_CLK_VF610) += clk-vf610.o >> +obj-$(CONFIG_CLK_IMXRT1050) += clk-imxrt1050.o > > Please keep this sorted, maybe on config symbol name? Ah sorry this happend when I rebased I will fix it. >> diff --git a/drivers/clk/imx/clk-imxrt1050.c b/drivers/clk/imx/clk-imxrt1050.c >> new file mode 100644 >> index 000000000000..a2f0e8663030 >> --- /dev/null >> +++ b/drivers/clk/imx/clk-imxrt1050.c >> @@ -0,0 +1,181 @@ >> +// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) >> +/* >> + * Copyright (C) 2021 >> + * Author(s): >> + * Jesse Taube >> + * Giulio Benetti >> + */ >> +#include >> +#include >> +#include > > Is this include used? > >> +#include >> +#include > > Drop unused includes. > >> +#include >> +#include >> +#include >> +#include >> +#include > > Used? > >> +#include >> +#include >> +#include > > Is this used? I will sort out posibly unused includes thx for pointing it out. >> +#include >> + >> +#include "clk.h" >> + >> +static const char * const pll_ref_sels[] = {"osc", "dummy", }; >> +static const char * const per_sels[] = {"ipg_pdof", "osc", }; >> +static const char * const pll1_bypass_sels[] = {"pll1_arm", "pll1_arm_ref_sel", }; >> +static const char * const pll2_bypass_sels[] = {"pll2_sys", "pll2_sys_ref_sel", }; >> +static const char * const pll3_bypass_sels[] = {"pll3_usb_otg", "pll3_usb_otg_ref_sel", }; >> +static const char * const pll5_bypass_sels[] = {"pll5_video", "pll5_video_ref_sel", }; >> +static const char *const pre_periph_sels[] = { >> + "pll2_sys", "pll2_pfd2_396m", "pll2_pfd0_352m", "arm_podf", }; >> +static const char *const periph_sels[] = { "pre_periph_sel", "todo", }; >> +static const char *const usdhc_sels[] = { "pll2_pfd2_396m", "pll2_pfd0_352m", }; >> +static const char *const lpuart_sels[] = { "pll3_80m", "osc", }; >> +static const char *const lcdif_sels[] = { >> + "pll2_sys", "pll3_pfd3_454_74m", "pll5_video", "pll2_pfd0_352m", >> + "pll2_pfd1_594m", "pll3_pfd1_664_62m", }; >> +static const char *const semc_alt_sels[] = { "pll2_pfd2_396m", "pll3_pfd1_664_62m", }; >> +static const char *const semc_sels[] = { "periph_sel", "semc_alt_sel", }; > > Any chance this can use clk_parent_data instead of string names for > parents? I copied this from imx8 but if nessasary I will do that. >> + >> +static struct clk_hw **hws; >> +static struct clk_hw_onecell_data *clk_hw_data; >> + >> +static void __init imxrt_clocks_common_init(void __iomem *base) > > Drop __init and preferably inline this to the callsite. Will do. >> +{ >> + /* Anatop clocks */ >> + hws[IMXRT1050_CLK_DUMMY] = imx_clk_hw_fixed("dummy", 0UL); >> + >> + hws[IMXRT1050_CLK_PLL1_REF_SEL] = imx_clk_hw_mux("pll1_arm_ref_sel", >> + base + 0x0, 14, 2, pll_ref_sels, ARRAY_SIZE(pll_ref_sels)); >> + hws[IMXRT1050_CLK_PLL2_REF_SEL] = imx_clk_hw_mux("pll2_sys_ref_sel", >> + base + 0x30, 14, 2, pll_ref_sels, ARRAY_SIZE(pll_ref_sels)); >> + hws[IMXRT1050_CLK_PLL3_REF_SEL] = imx_clk_hw_mux("pll3_usb_otg_ref_sel", >> + base + 0x10, 14, 2, pll_ref_sels, ARRAY_SIZE(pll_ref_sels)); >> + hws[IMXRT1050_CLK_PLL5_REF_SEL] = imx_clk_hw_mux("pll5_video_ref_sel", >> + base + 0xa0, 14, 2, pll_ref_sels, ARRAY_SIZE(pll_ref_sels)); >> + >> + hws[IMXRT1050_CLK_PLL1_ARM] = imx_clk_hw_pllv3(IMX_PLLV3_SYS, "pll1_arm", >> + "pll1_arm_ref_sel", base + 0x0, 0x7f); >> + hws[IMXRT1050_CLK_PLL2_SYS] = imx_clk_hw_pllv3(IMX_PLLV3_GENERIC, "pll2_sys", >> + "pll2_sys_ref_sel", base + 0x30, 0x1); >> + hws[IMXRT1050_CLK_PLL3_USB_OTG] = imx_clk_hw_pllv3(IMX_PLLV3_USB, "pll3_usb_otg", >> + "pll3_usb_otg_ref_sel", base + 0x10, 0x1); >> + hws[IMXRT1050_CLK_PLL5_VIDEO] = imx_clk_hw_pllv3(IMX_PLLV3_AV, "pll5_video", >> + "pll5_video_ref_sel", base + 0xa0, 0x7f); >> + >> + /* PLL bypass out */ >> + hws[IMXRT1050_CLK_PLL1_BYPASS] = imx_clk_hw_mux_flags("pll1_bypass", base + 0x0, 16, 1, >> + pll1_bypass_sels, ARRAY_SIZE(pll1_bypass_sels), CLK_SET_RATE_PARENT); >> + hws[IMXRT1050_CLK_PLL2_BYPASS] = imx_clk_hw_mux_flags("pll2_bypass", base + 0x30, 16, 1, >> + pll2_bypass_sels, ARRAY_SIZE(pll2_bypass_sels), CLK_SET_RATE_PARENT); >> + hws[IMXRT1050_CLK_PLL3_BYPASS] = imx_clk_hw_mux_flags("pll3_bypass", base + 0x10, 16, 1, >> + pll3_bypass_sels, ARRAY_SIZE(pll3_bypass_sels), CLK_SET_RATE_PARENT); >> + hws[IMXRT1050_CLK_PLL5_BYPASS] = imx_clk_hw_mux_flags("pll5_bypass", base + 0xa0, 16, 1, >> + pll5_bypass_sels, ARRAY_SIZE(pll5_bypass_sels), CLK_SET_RATE_PARENT); >> + >> + hws[IMXRT1050_CLK_VIDEO_POST_DIV_SEL] = imx_clk_hw_divider("video_post_div_sel", >> + "pll5_video", base + 0xa0, 19, 2); >> + hws[IMXRT1050_CLK_VIDEO_DIV] = imx_clk_hw_divider("video_div", >> + "video_post_div_sel", base + 0x170, 30, 2); >> + >> + hws[IMXRT1050_CLK_PLL3_80M] = imx_clk_hw_fixed_factor("pll3_80m", "pll3_usb_otg", 1, 6); >> + >> + hws[IMXRT1050_CLK_PLL2_PFD0_352M] = imx_clk_hw_pfd("pll2_pfd0_352m", "pll2_sys", base + 0x100, 0); >> + hws[IMXRT1050_CLK_PLL2_PFD1_594M] = imx_clk_hw_pfd("pll2_pfd1_594m", "pll2_sys", base + 0x100, 1); >> + hws[IMXRT1050_CLK_PLL2_PFD2_396M] = imx_clk_hw_pfd("pll2_pfd2_396m", "pll2_sys", base + 0x100, 2); >> + hws[IMXRT1050_CLK_PLL3_PFD1_664_62M] = imx_clk_hw_pfd("pll3_pfd1_664_62m", "pll3_usb_otg", base + 0xf0, 1); >> + hws[IMXRT1050_CLK_PLL3_PFD3_454_74M] = imx_clk_hw_pfd("pll3_pfd3_454_74m", "pll3_usb_otg", base + 0xf0, 3); >> +} >> + >> +static int imxrt1050_clocks_probe(struct platform_device *pdev) >> +{ >> + void __iomem *ccm_base; >> + void __iomem *pll_base; >> + struct device *dev = &pdev->dev; >> + struct device_node *np = dev->of_node; >> + struct device_node *anp; >> + int ret; >> + >> + clk_hw_data = kzalloc(struct_size(clk_hw_data, hws, >> + IMXRT1050_CLK_END), GFP_KERNEL); >> + if (WARN_ON(!clk_hw_data)) >> + return -ENOMEM; >> + >> + clk_hw_data->num = IMXRT1050_CLK_END; >> + hws = clk_hw_data->hws; >> + >> + hws[IMXRT1050_CLK_OSC] = __clk_get_hw(of_clk_get_by_name(np, "osc")); > > Use clk_parent_data instead and reference the binding name with .fw_name > >> + >> + anp = of_find_compatible_node(NULL, NULL, "fsl,imxrt-anatop"); >> + pll_base = of_iomap(anp, 0); >> + of_node_put(anp); >> + if (WARN_ON(!pll_base)) >> + return -ENOMEM; >> + imxrt_clocks_common_init(pll_base); >> + /* CCM clocks */ >> + ccm_base = devm_platform_ioremap_resource(pdev, 0); >> + if (WARN_ON(IS_ERR(ccm_base))) >> + return PTR_ERR(ccm_base); >> + >> + hws[IMXRT1050_CLK_ARM_PODF] = imx_clk_hw_divider("arm_podf", "pll1_arm", ccm_base + 0x10, 0, 3); >> + hws[IMXRT1050_CLK_PRE_PERIPH_SEL] = imx_clk_hw_mux("pre_periph_sel", ccm_base + 0x18, 18, 2, >> + pre_periph_sels, ARRAY_SIZE(pre_periph_sels)); >> + hws[IMXRT1050_CLK_PERIPH_SEL] = imx_clk_hw_mux("periph_sel", ccm_base + 0x14, 25, 1, >> + periph_sels, ARRAY_SIZE(periph_sels)); >> + hws[IMXRT1050_CLK_USDHC1_SEL] = imx_clk_hw_mux("usdhc1_sel", ccm_base + 0x1c, 16, 1, >> + usdhc_sels, ARRAY_SIZE(usdhc_sels)); >> + hws[IMXRT1050_CLK_USDHC2_SEL] = imx_clk_hw_mux("usdhc2_sel", ccm_base + 0x1c, 17, 1, >> + usdhc_sels, ARRAY_SIZE(usdhc_sels)); >> + hws[IMXRT1050_CLK_LPUART_SEL] = imx_clk_hw_mux("lpuart_sel", ccm_base + 0x24, 6, 1, >> + lpuart_sels, ARRAY_SIZE(lpuart_sels)); >> + hws[IMXRT1050_CLK_LCDIF_SEL] = imx_clk_hw_mux("lcdif_sel", ccm_base + 0x38, 15, 3, >> + lcdif_sels, ARRAY_SIZE(lcdif_sels)); >> + hws[IMXRT1050_CLK_PER_CLK_SEL] = imx_clk_hw_mux("per_sel", ccm_base + 0x1C, 6, 1, >> + per_sels, ARRAY_SIZE(per_sels)); >> + hws[IMXRT1050_CLK_SEMC_ALT_SEL] = imx_clk_hw_mux("semc_alt_sel", ccm_base + 0x14, 7, 1, >> + semc_alt_sels, ARRAY_SIZE(semc_alt_sels)); >> + hws[IMXRT1050_CLK_SEMC_SEL] = imx_clk_hw_mux_flags("semc_sel", ccm_base + 0x14, 6, 1, >> + semc_sels, ARRAY_SIZE(semc_sels), CLK_IS_CRITICAL); >> + >> + hws[IMXRT1050_CLK_AHB_PODF] = imx_clk_hw_divider("ahb", "periph_sel", ccm_base + 0x14, 10, 3); >> + hws[IMXRT1050_CLK_IPG_PDOF] = imx_clk_hw_divider("ipg", "ahb", ccm_base + 0x14, 8, 2); >> + hws[IMXRT1050_CLK_PER_PDOF] = imx_clk_hw_divider("per", "per_sel", ccm_base + 0x1C, 0, 5); >> + >> + hws[IMXRT1050_CLK_USDHC1_PODF] = imx_clk_hw_divider("usdhc1_podf", "usdhc1_sel", ccm_base + 0x24, 11, 3); >> + hws[IMXRT1050_CLK_USDHC2_PODF] = imx_clk_hw_divider("usdhc2_podf", "usdhc2_sel", ccm_base + 0x24, 16, 3); >> + hws[IMXRT1050_CLK_LPUART_PODF] = imx_clk_hw_divider("lpuart_podf", "lpuart_sel", ccm_base + 0x24, 0, 6); >> + hws[IMXRT1050_CLK_LCDIF_PRED] = imx_clk_hw_divider("lcdif_pred", "lcdif_sel", ccm_base + 0x38, 12, 3); >> + hws[IMXRT1050_CLK_LCDIF_PODF] = imx_clk_hw_divider("lcdif_podf", "lcdif_pred", ccm_base + 0x18, 23, 3); >> + >> + hws[IMXRT1050_CLK_USDHC1] = imx_clk_hw_gate2("usdhc1", "usdhc1_podf", ccm_base + 0x80, 2); >> + hws[IMXRT1050_CLK_USDHC2] = imx_clk_hw_gate2("usdhc2", "usdhc2_podf", ccm_base + 0x80, 4); >> + hws[IMXRT1050_CLK_LPUART1] = imx_clk_hw_gate2("lpuart1", "lpuart_podf", ccm_base + 0x7c, 24); >> + hws[IMXRT1050_CLK_LCDIF_APB] = imx_clk_hw_gate2("lcdif", "lcdif_podf", ccm_base + 0x74, 10); >> + hws[IMXRT1050_CLK_DMA] = imx_clk_hw_gate("dma", "ipg", ccm_base + 0x7C, 6); >> + hws[IMXRT1050_CLK_DMA_MUX] = imx_clk_hw_gate("dmamux0", "ipg", ccm_base + 0x7C, 7); >> + imx_check_clk_hws(hws, IMXRT1050_CLK_END); >> + >> + ret = of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_hw_data); >> + if (ret < 0) { >> + dev_err(dev, "Failed to register clks for i.MXRT1050.\n"); >> + imx_unregister_hw_clocks(hws, IMXRT1050_CLK_END); >> + return ret; > > Drop return > >> + } > > Newline here please > >> + return 0; > > return ret; Ah makes sence. >> +}. >> +static const struct of_device_id imxrt1050_clk_of_match[] = { >> + { .compatible = "fsl,imxrt1050-ccm" }, >> + { /* Sentinel */ }, > > Drop comma please so nothing can come after without causing compile fail. Okay makes sence, but its copied from imx8. >> +}; >> +MODULE_DEVICE_TABLE(of, imxrt1050_clk_of_match); >> + >> +static struct platform_driver imxrt1050_clk_driver = { >> + .probe = imxrt1050_clocks_probe, >> + .driver = { >> + .name = "imxrt1050-ccm", >> + .of_match_table = imxrt1050_clk_of_match, >> + }, >> +}; >> +module_platform_driver(imxrt1050_clk_driver); > > It's not a module though, unless the Kconfig is made into a tristate. Ah okay will look into this.