Commit a3b884ce authored by Nicolas Pitre's avatar Nicolas Pitre Committed by Sudeep Holla
Browse files

firmware: arm_scmi: Add clock management to the SCMI power domain 

Clocks requiring non-atomic contexts are supported by the generic clock
PM layer since commit 0bfa0820 ("PM: clk: make PM clock layer
compatible with clocks that must sleep"). That means we can have
SCMI-based clocks be managed by the SCMI power domain now.

Link: https://lore.kernel.org/r/5q88n947-pon-4940-3or6-s54o4r361o5s@onlyvoer.pbz


Tested-by: default avatarDien Pham <dien.pham.ry@renesas.com>
Reviewed-by: default avatarGaku Inami <gaku.inami.xh@renesas.com>
Signed-off-by: default avatarNicolas Pitre <npitre@baylibre.com>
Signed-off-by: default avatarSudeep Holla <sudeep.holla@arm.com>
parent 6efb943b

drivers/firmware/arm_scmi/scmi_pm_domain.c

+26 −0
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ 
#include <linux/err.h>

#include <linux/io.h>

#include <linux/module.h>

#include <linux/pm_clock.h>

#include <linux/pm_domain.h>

#include <linux/scmi_protocol.h>
@@ -52,6 +53,27 @@ static int scmi_pd_power_off(struct generic_pm_domain *domain) 
	return scmi_pd_power(domain, false);

}



static int scmi_pd_attach_dev(struct generic_pm_domain *pd, struct device *dev)

{

	int ret;



	ret = pm_clk_create(dev);

	if (ret)

		return ret;



	ret = of_pm_clk_add_clks(dev);

	if (ret >= 0)

		return 0;



	pm_clk_destroy(dev);

	return ret;

}



static void scmi_pd_detach_dev(struct generic_pm_domain *pd, struct device *dev)

{

	pm_clk_destroy(dev);

}



static int scmi_pm_domain_probe(struct scmi_device *sdev)

{

	int num_domains, i;
@@ -102,6 +124,10 @@ static int scmi_pm_domain_probe(struct scmi_device *sdev) 
		scmi_pd->genpd.name = scmi_pd->name;

		scmi_pd->genpd.power_off = scmi_pd_power_off;

		scmi_pd->genpd.power_on = scmi_pd_power_on;

		scmi_pd->genpd.attach_dev = scmi_pd_attach_dev;

		scmi_pd->genpd.detach_dev = scmi_pd_detach_dev;

		scmi_pd->genpd.flags = GENPD_FLAG_PM_CLK |

				       GENPD_FLAG_ACTIVE_WAKEUP;



		pm_genpd_init(&scmi_pd->genpd, NULL,

			      state == SCMI_POWER_STATE_GENERIC_OFF);