From a3b884cef8730ce1c7ad2276961bce46fbce8fd5 Mon Sep 17 00:00:00 2001 From: Nicolas Pitre Date: Fri, 7 May 2021 16:20:36 -0400 Subject: 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 0bfa0820c274 ("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: Dien Pham Reviewed-by: Gaku Inami Signed-off-by: Nicolas Pitre Signed-off-by: Sudeep Holla --- drivers/firmware/arm_scmi/scmi_pm_domain.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/firmware/arm_scmi/scmi_pm_domain.c b/drivers/firmware/arm_scmi/scmi_pm_domain.c index 9d36d5c0622d..4371fdcd5a73 100644 --- a/drivers/firmware/arm_scmi/scmi_pm_domain.c +++ b/drivers/firmware/arm_scmi/scmi_pm_domain.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include @@ -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); -- cgit