diff options
Diffstat (limited to 'drivers/soc/imx/imx93-pd.c')
| -rw-r--r-- | drivers/soc/imx/imx93-pd.c | 176 |
1 files changed, 0 insertions, 176 deletions
diff --git a/drivers/soc/imx/imx93-pd.c b/drivers/soc/imx/imx93-pd.c deleted file mode 100644 index 832deeed8fd6..000000000000 --- a/drivers/soc/imx/imx93-pd.c +++ /dev/null @@ -1,176 +0,0 @@ -// 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) - goto err_clk_unprepare; - - platform_set_drvdata(pdev, domain); - - ret = of_genpd_add_provider_simple(np, &domain->genpd); - if (ret) - goto err_genpd_remove; - - return 0; - -err_genpd_remove: - pm_genpd_remove(&domain->genpd); - -err_clk_unprepare: - if (!domain->init_off) - clk_bulk_disable_unprepare(domain->num_clks, domain->clks); - - return ret; -} - -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", - .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"); |