[RFC PATCH 3/3] ARM: keystone: pm_domain: setup clk pm domain clocks from DT
From: grygorii.strashko@ti.com (Grygorii Strashko)
Date: 2014-07-25 17:47:02
Also in:
linux-pm, linux-sh, lkml
Subsystem:
arm port, arm/texas instrument keystone architecture, the rest · Maintainers:
Russell King, Nishanth Menon, Santosh Shilimkar, Linus Torvalds
This patch implements custom pm_clk_notifier callback for Keystone 2 CLK PM domain which fills list of clocks for Device with all clocks assigned to this Device in DT. After this patch .con_ids field in pm_clk_notifier_block is not used and there are no limitation for clocks names in DT any more. Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> --- arch/arm/mach-keystone/pm_domain.c | 46 ++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+)
diff --git a/arch/arm/mach-keystone/pm_domain.c b/arch/arm/mach-keystone/pm_domain.c
index ca79dda..56542d2 100644
--- a/arch/arm/mach-keystone/pm_domain.c
+++ b/arch/arm/mach-keystone/pm_domain.c@@ -47,6 +47,51 @@ static int keystone_pm_runtime_resume(struct device *dev) return pm_generic_runtime_resume(dev); } + +static int keystone_pm_clk_notify(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct pm_clk_notifier_block *clknb; + struct device *dev = data; + int error; + unsigned int i; + struct clk *clk; + struct device_node *np = dev->of_node; + + dev_dbg(dev, "%s() %ld\n", __func__, action); + + clknb = container_of(nb, struct pm_clk_notifier_block, nb); + + switch (action) { + case BUS_NOTIFY_BIND_DRIVER: + if (dev->pm_domain) + break; + + error = pm_clk_create(dev); + if (error) + break; + + dev->pm_domain = clknb->pm_domain; + + for (i = 0; (clk = of_clk_get(np, i)) && !IS_ERR(clk); i++) { + if (pm_clk_add_clk(dev, clk)) + clk_put(clk); + } + + break; + case BUS_NOTIFY_UNBOUND_DRIVER: + if (dev->pm_domain != clknb->pm_domain) + break; + + dev->pm_domain = NULL; + pm_clk_destroy(dev); + break; + } + + return 0; +} +#else + #endif static struct dev_pm_domain keystone_pm_domain = {
@@ -59,6 +104,7 @@ static struct dev_pm_domain keystone_pm_domain = { static struct pm_clk_notifier_block platform_domain_notifier = { .pm_domain = &keystone_pm_domain, + .nb = { .notifier_call = keystone_pm_clk_notify, }, }; static struct of_device_id of_keystone_table[] = {
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1.7.9.5