From e465007a7a7ca745f018fdcacb0a5a911a5c50d9 Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Tue, 10 May 2016 15:52:20 +0200 Subject: ARM: EXYNOS: Move pm_domains driver to drivers/soc/samsung Exynos PM domains driver does not have mach-specific dependencies so it can be safely moved out of arm/mach-exynos to drivers/soc. This in future will allow re-using it on ARM64 boards. Signed-off-by: Krzysztof Kozlowski Reviewed-by: Javier Martinez Canillas --- arch/arm/mach-exynos/pm_domains.c | 223 -------------------------------------- 1 file changed, 223 deletions(-) delete mode 100644 arch/arm/mach-exynos/pm_domains.c (limited to 'arch/arm/mach-exynos/pm_domains.c') diff --git a/arch/arm/mach-exynos/pm_domains.c b/arch/arm/mach-exynos/pm_domains.c deleted file mode 100644 index 875a2bab64f6..000000000000 --- a/arch/arm/mach-exynos/pm_domains.c +++ /dev/null @@ -1,223 +0,0 @@ -/* - * 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. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. -*/ - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define INT_LOCAL_PWR_EN 0x7 -#define MAX_CLK_PER_DOMAIN 4 - -/* - * Exynos specific wrapper around the generic power domain - */ -struct exynos_pm_domain { - void __iomem *base; - char const *name; - bool is_off; - struct generic_pm_domain pd; - struct clk *oscclk; - struct clk *clk[MAX_CLK_PER_DOMAIN]; - struct clk *pclk[MAX_CLK_PER_DOMAIN]; - struct clk *asb_clk[MAX_CLK_PER_DOMAIN]; -}; - -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; - int i; - - pd = container_of(domain, struct exynos_pm_domain, pd); - base = pd->base; - - for (i = 0; i < MAX_CLK_PER_DOMAIN; i++) { - if (IS_ERR(pd->asb_clk[i])) - break; - clk_prepare_enable(pd->asb_clk[i]); - } - - /* Set oscclk before powering off a domain*/ - if (!power_on) { - for (i = 0; i < MAX_CLK_PER_DOMAIN; i++) { - if (IS_ERR(pd->clk[i])) - break; - pd->pclk[i] = clk_get_parent(pd->clk[i]); - if (clk_set_parent(pd->clk[i], pd->oscclk)) - pr_err("%s: error setting oscclk as parent to clock %d\n", - pd->name, i); - } - } - - pwr = power_on ? INT_LOCAL_PWR_EN : 0; - __raw_writel(pwr, base); - - /* Wait max 1ms */ - timeout = 10; - - while ((__raw_readl(base + 0x4) & INT_LOCAL_PWR_EN) != 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); - } - - /* Restore clocks after powering on a domain*/ - if (power_on) { - for (i = 0; i < MAX_CLK_PER_DOMAIN; i++) { - if (IS_ERR(pd->clk[i])) - break; - - if (IS_ERR(pd->pclk[i])) - continue; /* Skip on first power up */ - if (clk_set_parent(pd->clk[i], pd->pclk[i])) - pr_err("%s: error setting parent to clock%d\n", - pd->name, i); - } - } - - for (i = 0; i < MAX_CLK_PER_DOMAIN; i++) { - if (IS_ERR(pd->asb_clk[i])) - break; - clk_disable_unprepare(pd->asb_clk[i]); - } - - 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 __init int exynos4_pm_init_power_domain(void) -{ - struct device_node *np; - - for_each_compatible_node(np, NULL, "samsung,exynos4210-pd") { - struct exynos_pm_domain *pd; - int on, i; - - pd = kzalloc(sizeof(*pd), GFP_KERNEL); - if (!pd) { - pr_err("%s: failed to allocate memory for domain\n", - __func__); - of_node_put(np); - return -ENOMEM; - } - pd->pd.name = kstrdup_const(strrchr(np->full_name, '/') + 1, - GFP_KERNEL); - if (!pd->pd.name) { - kfree(pd); - of_node_put(np); - return -ENOMEM; - } - - pd->name = pd->pd.name; - pd->base = of_iomap(np, 0); - if (!pd->base) { - pr_warn("%s: failed to map memory\n", __func__); - kfree_const(pd->pd.name); - kfree(pd); - continue; - } - - pd->pd.power_off = exynos_pd_power_off; - pd->pd.power_on = exynos_pd_power_on; - - for (i = 0; i < MAX_CLK_PER_DOMAIN; i++) { - char clk_name[8]; - - snprintf(clk_name, sizeof(clk_name), "asb%d", i); - pd->asb_clk[i] = of_clk_get_by_name(np, clk_name); - if (IS_ERR(pd->asb_clk[i])) - break; - } - - pd->oscclk = of_clk_get_by_name(np, "oscclk"); - if (IS_ERR(pd->oscclk)) - goto no_clk; - - for (i = 0; i < MAX_CLK_PER_DOMAIN; i++) { - char clk_name[8]; - - snprintf(clk_name, sizeof(clk_name), "clk%d", i); - pd->clk[i] = of_clk_get_by_name(np, clk_name); - if (IS_ERR(pd->clk[i])) - break; - /* - * Skip setting parent on first power up. - * The parent at this time may not be useful at all. - */ - pd->pclk[i] = ERR_PTR(-EINVAL); - } - - if (IS_ERR(pd->clk[0])) - clk_put(pd->oscclk); - -no_clk: - on = __raw_readl(pd->base + 0x4) & INT_LOCAL_PWR_EN; - - pm_genpd_init(&pd->pd, NULL, !on); - of_genpd_add_provider_simple(np, &pd->pd); - } - - /* Assign the child power domains to their parents */ - for_each_compatible_node(np, NULL, "samsung,exynos4210-pd") { - struct generic_pm_domain *child_domain, *parent_domain; - struct of_phandle_args args; - - args.np = np; - args.args_count = 0; - child_domain = of_genpd_get_from_provider(&args); - if (IS_ERR(child_domain)) - continue; - - if (of_parse_phandle_with_args(np, "power-domains", - "#power-domain-cells", 0, &args) != 0) - continue; - - parent_domain = of_genpd_get_from_provider(&args); - if (IS_ERR(parent_domain)) - continue; - - if (pm_genpd_add_subdomain(parent_domain, child_domain)) - pr_warn("%s failed to add subdomain: %s\n", - parent_domain->name, child_domain->name); - else - pr_info("%s has as child subdomain: %s.\n", - parent_domain->name, child_domain->name); - } - - return 0; -} -core_initcall(exynos4_pm_init_power_domain); -- cgit v1.2.3-59-g8ed1b