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author | Ulf Hansson <ulf.hansson@linaro.org> | 2023-07-05 18:08:50 +0200 |
---|---|---|
committer | Ulf Hansson <ulf.hansson@linaro.org> | 2023-07-14 10:40:56 +0200 |
commit | 4419644bfc7f2ef86708758060d263500af9f88a (patch) | |
tree | c6b1de45d64ff3f25cb339632a24c1136ce0680b /drivers/soc/samsung | |
parent | a8fcd3da73decacc8155c954a850c37777f75623 (diff) | |
download | linux-stable-4419644bfc7f2ef86708758060d263500af9f88a.tar.gz linux-stable-4419644bfc7f2ef86708758060d263500af9f88a.tar.bz2 linux-stable-4419644bfc7f2ef86708758060d263500af9f88a.zip |
soc: samsung: Move power-domain driver to the genpd dir
To simplify with maintenance let's move the samsung power-domain driver to
the new genpd directory. Going forward, patches are intended to be managed
through a separate git tree, according to MAINTAINERS.
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc: Alim Akhtar <alim.akhtar@samsung.com>
Cc: <linux-samsung-soc@vger.kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/soc/samsung')
-rw-r--r-- | drivers/soc/samsung/Makefile | 1 | ||||
-rw-r--r-- | drivers/soc/samsung/pm_domains.c | 166 |
2 files changed, 0 insertions, 167 deletions
diff --git a/drivers/soc/samsung/Makefile b/drivers/soc/samsung/Makefile index d35270fc6b2b..248a33d7754a 100644 --- a/drivers/soc/samsung/Makefile +++ b/drivers/soc/samsung/Makefile @@ -10,7 +10,6 @@ obj-$(CONFIG_EXYNOS_PMU) += exynos-pmu.o obj-$(CONFIG_EXYNOS_PMU_ARM_DRIVERS) += exynos3250-pmu.o exynos4-pmu.o \ exynos5250-pmu.o exynos5420-pmu.o -obj-$(CONFIG_EXYNOS_PM_DOMAINS) += pm_domains.o obj-$(CONFIG_EXYNOS_REGULATOR_COUPLER) += exynos-regulator-coupler.o obj-$(CONFIG_SAMSUNG_PM_CHECK) += s3c-pm-check.o diff --git a/drivers/soc/samsung/pm_domains.c b/drivers/soc/samsung/pm_domains.c deleted file mode 100644 index d07f3c9d6903..000000000000 --- a/drivers/soc/samsung/pm_domains.c +++ /dev/null @@ -1,166 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -// -// Exynos Generic power domain support. -// -// Copyright (c) 2012 Samsung Electronics Co., Ltd. -// http://www.samsung.com -// -// Implementation of Exynos specific power domain control which is used in -// conjunction with runtime-pm. Support for both device-tree and non-device-tree -// based power domain support is included. - -#include <linux/io.h> -#include <linux/err.h> -#include <linux/slab.h> -#include <linux/pm_domain.h> -#include <linux/delay.h> -#include <linux/of_address.h> -#include <linux/of_platform.h> -#include <linux/pm_runtime.h> - -struct exynos_pm_domain_config { - /* Value for LOCAL_PWR_CFG and STATUS fields for each domain */ - u32 local_pwr_cfg; -}; - -/* - * Exynos specific wrapper around the generic power domain - */ -struct exynos_pm_domain { - void __iomem *base; - struct generic_pm_domain pd; - u32 local_pwr_cfg; -}; - -static int exynos_pd_power(struct generic_pm_domain *domain, bool power_on) -{ - struct exynos_pm_domain *pd; - void __iomem *base; - u32 timeout, pwr; - char *op; - - pd = container_of(domain, struct exynos_pm_domain, pd); - base = pd->base; - - pwr = power_on ? pd->local_pwr_cfg : 0; - writel_relaxed(pwr, base); - - /* Wait max 1ms */ - timeout = 10; - - while ((readl_relaxed(base + 0x4) & pd->local_pwr_cfg) != pwr) { - if (!timeout) { - op = (power_on) ? "enable" : "disable"; - pr_err("Power domain %s %s failed\n", domain->name, op); - return -ETIMEDOUT; - } - timeout--; - cpu_relax(); - usleep_range(80, 100); - } - - return 0; -} - -static int exynos_pd_power_on(struct generic_pm_domain *domain) -{ - return exynos_pd_power(domain, true); -} - -static int exynos_pd_power_off(struct generic_pm_domain *domain) -{ - return exynos_pd_power(domain, false); -} - -static const struct exynos_pm_domain_config exynos4210_cfg = { - .local_pwr_cfg = 0x7, -}; - -static const struct exynos_pm_domain_config exynos5433_cfg = { - .local_pwr_cfg = 0xf, -}; - -static const struct of_device_id exynos_pm_domain_of_match[] = { - { - .compatible = "samsung,exynos4210-pd", - .data = &exynos4210_cfg, - }, { - .compatible = "samsung,exynos5433-pd", - .data = &exynos5433_cfg, - }, - { }, -}; - -static const char *exynos_get_domain_name(struct device_node *node) -{ - const char *name; - - if (of_property_read_string(node, "label", &name) < 0) - name = kbasename(node->full_name); - return kstrdup_const(name, GFP_KERNEL); -} - -static int exynos_pd_probe(struct platform_device *pdev) -{ - const struct exynos_pm_domain_config *pm_domain_cfg; - struct device *dev = &pdev->dev; - struct device_node *np = dev->of_node; - struct of_phandle_args child, parent; - struct exynos_pm_domain *pd; - int on, ret; - - pm_domain_cfg = of_device_get_match_data(dev); - pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); - if (!pd) - return -ENOMEM; - - pd->pd.name = exynos_get_domain_name(np); - if (!pd->pd.name) - return -ENOMEM; - - pd->base = of_iomap(np, 0); - if (!pd->base) { - kfree_const(pd->pd.name); - return -ENODEV; - } - - pd->pd.power_off = exynos_pd_power_off; - pd->pd.power_on = exynos_pd_power_on; - pd->local_pwr_cfg = pm_domain_cfg->local_pwr_cfg; - - on = readl_relaxed(pd->base + 0x4) & pd->local_pwr_cfg; - - pm_genpd_init(&pd->pd, NULL, !on); - ret = of_genpd_add_provider_simple(np, &pd->pd); - - if (ret == 0 && of_parse_phandle_with_args(np, "power-domains", - "#power-domain-cells", 0, &parent) == 0) { - child.np = np; - child.args_count = 0; - - if (of_genpd_add_subdomain(&parent, &child)) - pr_warn("%pOF failed to add subdomain: %pOF\n", - parent.np, child.np); - else - pr_info("%pOF has as child subdomain: %pOF.\n", - parent.np, child.np); - } - - pm_runtime_enable(dev); - return ret; -} - -static struct platform_driver exynos_pd_driver = { - .probe = exynos_pd_probe, - .driver = { - .name = "exynos-pd", - .of_match_table = exynos_pm_domain_of_match, - .suppress_bind_attrs = true, - } -}; - -static __init int exynos4_pm_init_power_domain(void) -{ - return platform_driver_register(&exynos_pd_driver); -} -core_initcall(exynos4_pm_init_power_domain); |