ARM: exynos: Move to generic PM domain DT bindings
This patch moves Exynos PM domain code to use the new generic PM domain look-up framework introduced in previous patches, thus also allowing the new code to be compiled with CONFIG_ARCH_EXYNOS. This patch was originally submitted by Tomasz Figa when he was employed by Samsung. Link: http://marc.info/?l=linux-pm&m=139955336002083&w=2 Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Kevin Hilman <khilman@linaro.org> Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Tomasz Figa
Rafael J. Wysocki
parent
207f1a2d29
commit
a4a8c2c496
3 changed files with 8 additions and 85 deletions
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@ -8,6 +8,8 @@ Required Properties:
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* samsung,exynos4210-pd - for exynos4210 type power domain.
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- reg: physical base address of the controller and length of memory mapped
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region.
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- #power-domain-cells: number of cells in power domain specifier;
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must be 0.
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Optional Properties:
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- clocks: List of clock handles. The parent clocks of the input clocks to the
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@ -29,6 +31,7 @@ Example:
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lcd0: power-domain-lcd0 {
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compatible = "samsung,exynos4210-pd";
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reg = <0x10023C00 0x10>;
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#power-domain-cells = <0>;
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};
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mfc_pd: power-domain@10044060 {
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@ -37,12 +40,8 @@ Example:
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clocks = <&clock CLK_FIN_PLL>, <&clock CLK_MOUT_SW_ACLK333>,
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<&clock CLK_MOUT_USER_ACLK333>;
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clock-names = "oscclk", "pclk0", "clk0";
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#power-domain-cells = <0>;
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};
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Example of the node using power domain:
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node {
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/* ... */
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samsung,power-domain = <&lcd0>;
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/* ... */
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};
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See Documentation/devicetree/bindings/power/power_domain.txt for description
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of consumer-side bindings.
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@ -105,78 +105,6 @@ static int exynos_pd_power_off(struct generic_pm_domain *domain)
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return exynos_pd_power(domain, false);
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}
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static void exynos_add_device_to_domain(struct exynos_pm_domain *pd,
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struct device *dev)
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{
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int ret;
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dev_dbg(dev, "adding to power domain %s\n", pd->pd.name);
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while (1) {
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ret = pm_genpd_add_device(&pd->pd, dev);
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if (ret != -EAGAIN)
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break;
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cond_resched();
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}
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pm_genpd_dev_need_restore(dev, true);
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}
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static void exynos_remove_device_from_domain(struct device *dev)
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{
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struct generic_pm_domain *genpd = dev_to_genpd(dev);
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int ret;
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dev_dbg(dev, "removing from power domain %s\n", genpd->name);
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while (1) {
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ret = pm_genpd_remove_device(genpd, dev);
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if (ret != -EAGAIN)
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break;
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cond_resched();
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}
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}
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static void exynos_read_domain_from_dt(struct device *dev)
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{
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struct platform_device *pd_pdev;
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struct exynos_pm_domain *pd;
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struct device_node *node;
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node = of_parse_phandle(dev->of_node, "samsung,power-domain", 0);
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if (!node)
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return;
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pd_pdev = of_find_device_by_node(node);
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if (!pd_pdev)
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return;
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pd = platform_get_drvdata(pd_pdev);
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exynos_add_device_to_domain(pd, dev);
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}
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static int exynos_pm_notifier_call(struct notifier_block *nb,
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unsigned long event, void *data)
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{
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struct device *dev = data;
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switch (event) {
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case BUS_NOTIFY_BIND_DRIVER:
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if (dev->of_node)
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exynos_read_domain_from_dt(dev);
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break;
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case BUS_NOTIFY_UNBOUND_DRIVER:
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exynos_remove_device_from_domain(dev);
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break;
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}
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return NOTIFY_DONE;
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}
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static struct notifier_block platform_nb = {
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.notifier_call = exynos_pm_notifier_call,
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};
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static __init int exynos4_pm_init_power_domain(void)
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{
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struct platform_device *pdev;
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@ -202,7 +130,6 @@ static __init int exynos4_pm_init_power_domain(void)
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pd->base = of_iomap(np, 0);
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pd->pd.power_off = exynos_pd_power_off;
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pd->pd.power_on = exynos_pd_power_on;
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pd->pd.of_node = np;
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pd->oscclk = clk_get(dev, "oscclk");
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if (IS_ERR(pd->oscclk))
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@ -228,15 +155,12 @@ static __init int exynos4_pm_init_power_domain(void)
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clk_put(pd->oscclk);
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no_clk:
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platform_set_drvdata(pdev, pd);
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on = __raw_readl(pd->base + 0x4) & INT_LOCAL_PWR_EN;
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pm_genpd_init(&pd->pd, NULL, !on);
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of_genpd_add_provider_simple(np, &pd->pd);
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}
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bus_register_notifier(&platform_bus_type, &platform_nb);
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return 0;
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}
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arch_initcall(exynos4_pm_init_power_domain);
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@ -304,7 +304,7 @@ config PM_GENERIC_DOMAINS_RUNTIME
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config PM_GENERIC_DOMAINS_OF
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def_bool y
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depends on PM_GENERIC_DOMAINS && OF && !ARCH_EXYNOS
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depends on PM_GENERIC_DOMAINS && OF
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config CPU_PM
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bool
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