Commit 176958dd authored by Tony Lindgren's avatar Tony Lindgren
Browse files

soc: ti: omap-prm: Add pm_clk for genpd 



In order to probe l3 and l4 interconnects with simple-pm-bus, we want
genpd to manage the clocks for the interconnects. For interconnect target
modules, we already have ti-sysc manage the clocks so let's skipe managing
clocks for ti-sysc modules.

Cc: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent 9fac0899

drivers/soc/ti/omap_prm.c

+44 −0
Original line number Diff line number Diff line
@@ -7,6 +7,7 @@ 
 */



#include <linux/kernel.h>

#include <linux/clk.h>

#include <linux/device.h>

#include <linux/io.h>

#include <linux/iopoll.h>
@@ -14,6 +15,7 @@ 
#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/platform_device.h>

#include <linux/pm_clock.h>

#include <linux/pm_domain.h>

#include <linux/reset-controller.h>

#include <linux/delay.h>
@@ -41,6 +43,7 @@ struct omap_prm_domain { 
	u16 pwrstst;

	const struct omap_prm_domain_map *cap;

	u32 pwrstctrl_saved;

	unsigned int uses_pm_clk:1;

};



struct omap_rst_map {
@@ -325,6 +328,38 @@ static int omap_prm_domain_power_off(struct generic_pm_domain *domain) 
	return 0;

}



/*

 * Note that ti-sysc already manages the module clocks separately so

 * no need to manage those. Interconnect instances need clocks managed

 * for simple-pm-bus.

 */

static int omap_prm_domain_attach_clock(struct device *dev,

					struct omap_prm_domain *prmd)

{

	struct device_node *np = dev->of_node;

	int error;



	if (!of_device_is_compatible(np, "simple-pm-bus"))

		return 0;



	if (!of_property_read_bool(np, "clocks"))

		return 0;



	error = pm_clk_create(dev);

	if (error)

		return error;



	error = of_pm_clk_add_clks(dev);

	if (error < 0) {

		pm_clk_destroy(dev);

		return error;

	}



	prmd->uses_pm_clk = 1;



	return 0;

}



static int omap_prm_domain_attach_dev(struct generic_pm_domain *domain,

				      struct device *dev)

{
@@ -349,6 +384,10 @@ static int omap_prm_domain_attach_dev(struct generic_pm_domain *domain, 
	genpd_data = dev_gpd_data(dev);

	genpd_data->data = NULL;



	ret = omap_prm_domain_attach_clock(dev, prmd);

	if (ret)

		return ret;



	return 0;

}
@@ -356,7 +395,11 @@ static void omap_prm_domain_detach_dev(struct generic_pm_domain *domain, 
				       struct device *dev)

{

	struct generic_pm_domain_data *genpd_data;

	struct omap_prm_domain *prmd;



	prmd = genpd_to_prm_domain(domain);

	if (prmd->uses_pm_clk)

		pm_clk_destroy(dev);

	genpd_data = dev_gpd_data(dev);

	genpd_data->data = NULL;

}
@@ -393,6 +436,7 @@ static int omap_prm_domain_init(struct device *dev, struct omap_prm *prm) 
	prmd->pd.power_off = omap_prm_domain_power_off;

	prmd->pd.attach_dev = omap_prm_domain_attach_dev;

	prmd->pd.detach_dev = omap_prm_domain_detach_dev;

	prmd->pd.flags = GENPD_FLAG_PM_CLK;



	pm_genpd_init(&prmd->pd, NULL, true);

	error = of_genpd_add_provider_simple(np, &prmd->pd);

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