From e465007a7a7ca745f018fdcacb0a5a911a5c50d9 Mon Sep 17 00:00:00 2001
From: Krzysztof Kozlowski <k.kozlowski@samsung.com>
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 <k.kozlowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
---
arch/arm/mach-exynos/Makefile | 1 -
arch/arm/mach-exynos/pm_domains.c | 223 --------------------------------------
2 files changed, 224 deletions(-)
delete mode 100644 arch/arm/mach-exynos/pm_domains.c
(limited to 'arch/arm/mach-exynos')
diff --git a/arch/arm/mach-exynos/Makefile b/arch/arm/mach-exynos/Makefile
index 34d29df3e006..838249d4ff5c 100644
--- a/arch/arm/mach-exynos/Makefile
+++ b/arch/arm/mach-exynos/Makefile
@@ -13,7 +13,6 @@ obj-$(CONFIG_ARCH_EXYNOS) += exynos.o exynos-smc.o firmware.o
obj-$(CONFIG_EXYNOS_CPU_SUSPEND) += pm.o sleep.o
obj-$(CONFIG_PM_SLEEP) += suspend.o
-obj-$(CONFIG_PM_GENERIC_DOMAINS) += pm_domains.o
obj-$(CONFIG_SMP) += platsmp.o headsmp.o
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 <linux/io.h>
-#include <linux/err.h>
-#include <linux/slab.h>
-#include <linux/pm_domain.h>
-#include <linux/clk.h>
-#include <linux/delay.h>
-#include <linux/of_address.h>
-#include <linux/of_platform.h>
-#include <linux/sched.h>
-
-#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);
--
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