Commit 0a0f7cc2 authored by Peng Fan's avatar Peng Fan Committed by Shawn Guo
Browse files

soc: imx: add i.MX93 SRC power domain driver 



Support controlling power domain managed by System Reset
Controller(SRC). Current supported power domain is mediamix power
domain.

Signed-off-by: default avatarPeng Fan <peng.fan@nxp.com>
Signed-off-by: default avatarShawn Guo <shawnguo@kernel.org>
parent df5a6965

drivers/soc/imx/Kconfig

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@@ -20,4 +20,12 @@ config SOC_IMX8M 
	  support, it will provide the SoC info like SoC family,

	  ID and revision etc.



config SOC_IMX9

	tristate "i.MX9 SoC family support"

	depends on ARCH_MXC || COMPILE_TEST

	default ARCH_MXC && ARM64

	select SOC_BUS

	help

	  If you say yes here, you get support for the NXP i.MX9 family



endmenu

drivers/soc/imx/Makefile

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@@ -7,3 +7,4 @@ obj-$(CONFIG_IMX_GPCV2_PM_DOMAINS) += gpcv2.o 
obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o

obj-$(CONFIG_SOC_IMX8M) += imx8m-blk-ctrl.o

obj-$(CONFIG_SOC_IMX8M) += imx8mp-blk-ctrl.o

obj-$(CONFIG_SOC_IMX9) += imx93-src.o imx93-pd.o

drivers/soc/imx/imx93-pd.c

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// SPDX-License-Identifier: GPL-2.0

/*

 * Copyright 2022 NXP

 */



#include <linux/clk.h>

#include <linux/delay.h>

#include <linux/of_device.h>

#include <linux/iopoll.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/pm_domain.h>



#define MIX_SLICE_SW_CTRL_OFF		0x20

#define SLICE_SW_CTRL_PSW_CTRL_OFF_MASK	BIT(4)

#define SLICE_SW_CTRL_PDN_SOFT_MASK	BIT(31)



#define MIX_FUNC_STAT_OFF		0xB4



#define FUNC_STAT_PSW_STAT_MASK		BIT(0)

#define FUNC_STAT_RST_STAT_MASK		BIT(2)

#define FUNC_STAT_ISO_STAT_MASK		BIT(4)



struct imx93_power_domain {

	struct generic_pm_domain genpd;

	struct device *dev;

	void __iomem *addr;

	struct clk_bulk_data *clks;

	int num_clks;

	bool init_off;

};



#define to_imx93_pd(_genpd) container_of(_genpd, struct imx93_power_domain, genpd)



static int imx93_pd_on(struct generic_pm_domain *genpd)

{

	struct imx93_power_domain *domain = to_imx93_pd(genpd);

	void __iomem *addr = domain->addr;

	u32 val;

	int ret;



	ret = clk_bulk_prepare_enable(domain->num_clks, domain->clks);

	if (ret) {

		dev_err(domain->dev, "failed to enable clocks for domain: %s\n", genpd->name);

		return ret;

	}



	val = readl(addr + MIX_SLICE_SW_CTRL_OFF);

	val &= ~SLICE_SW_CTRL_PDN_SOFT_MASK;

	writel(val, addr + MIX_SLICE_SW_CTRL_OFF);



	ret = readl_poll_timeout(addr + MIX_FUNC_STAT_OFF, val,

				 !(val & FUNC_STAT_ISO_STAT_MASK), 1, 10000);

	if (ret) {

		dev_err(domain->dev, "pd_on timeout: name: %s, stat: %x\n", genpd->name, val);

		return ret;

	}



	return 0;

}



static int imx93_pd_off(struct generic_pm_domain *genpd)

{

	struct imx93_power_domain *domain = to_imx93_pd(genpd);

	void __iomem *addr = domain->addr;

	int ret;

	u32 val;



	/* Power off MIX */

	val = readl(addr + MIX_SLICE_SW_CTRL_OFF);

	val |= SLICE_SW_CTRL_PDN_SOFT_MASK;

	writel(val, addr + MIX_SLICE_SW_CTRL_OFF);



	ret = readl_poll_timeout(addr + MIX_FUNC_STAT_OFF, val,

				 val & FUNC_STAT_PSW_STAT_MASK, 1, 1000);

	if (ret) {

		dev_err(domain->dev, "pd_off timeout: name: %s, stat: %x\n", genpd->name, val);

		return ret;

	}



	clk_bulk_disable_unprepare(domain->num_clks, domain->clks);



	return 0;

};



static int imx93_pd_remove(struct platform_device *pdev)

{

	struct imx93_power_domain *domain = platform_get_drvdata(pdev);

	struct device *dev = &pdev->dev;

	struct device_node *np = dev->of_node;



	if (!domain->init_off)

		clk_bulk_disable_unprepare(domain->num_clks, domain->clks);



	of_genpd_del_provider(np);

	pm_genpd_remove(&domain->genpd);



	return 0;

}



static int imx93_pd_probe(struct platform_device *pdev)

{

	struct device *dev = &pdev->dev;

	struct device_node *np = dev->of_node;

	struct imx93_power_domain *domain;

	int ret;



	domain = devm_kzalloc(dev, sizeof(*domain), GFP_KERNEL);

	if (!domain)

		return -ENOMEM;



	domain->addr = devm_platform_ioremap_resource(pdev, 0);

	if (IS_ERR(domain->addr))

		return PTR_ERR(domain->addr);



	domain->num_clks = devm_clk_bulk_get_all(dev, &domain->clks);

	if (domain->num_clks < 0)

		return dev_err_probe(dev, domain->num_clks, "Failed to get domain's clocks\n");



	domain->genpd.name = dev_name(dev);

	domain->genpd.power_off = imx93_pd_off;

	domain->genpd.power_on = imx93_pd_on;

	domain->dev = dev;



	domain->init_off = readl(domain->addr + MIX_FUNC_STAT_OFF) & FUNC_STAT_ISO_STAT_MASK;

	/* Just to sync the status of hardware */

	if (!domain->init_off) {

		ret = clk_bulk_prepare_enable(domain->num_clks, domain->clks);

		if (ret) {

			dev_err(domain->dev, "failed to enable clocks for domain: %s\n",

				domain->genpd.name);

			return ret;

		}

	}



	ret = pm_genpd_init(&domain->genpd, NULL, domain->init_off);

	if (ret)

		return ret;



	platform_set_drvdata(pdev, domain);



	return of_genpd_add_provider_simple(np, &domain->genpd);

}



static const struct of_device_id imx93_pd_ids[] = {

	{ .compatible = "fsl,imx93-src-slice" },

	{ }

};

MODULE_DEVICE_TABLE(of, imx93_pd_ids);



static struct platform_driver imx93_power_domain_driver = {

	.driver = {

		.name	= "imx93_power_domain",

		.owner	= THIS_MODULE,

		.of_match_table = imx93_pd_ids,

	},

	.probe = imx93_pd_probe,

	.remove = imx93_pd_remove,

};

module_platform_driver(imx93_power_domain_driver);



MODULE_AUTHOR("Peng Fan <peng.fan@nxp.com>");

MODULE_DESCRIPTION("NXP i.MX93 power domain driver");

MODULE_LICENSE("GPL");

drivers/soc/imx/imx93-src.c

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// SPDX-License-Identifier: GPL-2.0

/*

 * Copyright 2022 NXP

 */



#include <linux/module.h>

#include <linux/of_platform.h>

#include <linux/platform_device.h>



static int imx93_src_probe(struct platform_device *pdev)

{

	return devm_of_platform_populate(&pdev->dev);

}



static const struct of_device_id imx93_src_ids[] = {

	{ .compatible = "fsl,imx93-src" },

	{ }

};

MODULE_DEVICE_TABLE(of, imx93_src_ids);



static struct platform_driver imx93_src_driver = {

	.driver = {

		.name	= "imx93_src",

		.owner	= THIS_MODULE,

		.of_match_table = imx93_src_ids,

	},

	.probe = imx93_src_probe,

};

module_platform_driver(imx93_src_driver);



MODULE_AUTHOR("Peng Fan <peng.fan@nxp.com>");

MODULE_DESCRIPTION("NXP i.MX93 src driver");

MODULE_LICENSE("GPL");