summaryrefslogtreecommitdiff
path: root/drivers/firmware/arm_scmi
diff options
context:
space:
mode:
authorNicolas Pitre <npitre@baylibre.com>2021-05-07 16:20:36 -0400
committerSudeep Holla <sudeep.holla@arm.com>2021-05-11 16:01:39 +0100
commita3b884cef8730ce1c7ad2276961bce46fbce8fd5 (patch)
tree8714ead1d24bb61d650c97529d1a9013dd5e8429 /drivers/firmware/arm_scmi
parent6efb943b8616ec53a5e444193dccf1af9ad627b5 (diff)
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 <dien.pham.ry@renesas.com> Reviewed-by: Gaku Inami <gaku.inami.xh@renesas.com> Signed-off-by: Nicolas Pitre <npitre@baylibre.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'drivers/firmware/arm_scmi')
-rw-r--r--drivers/firmware/arm_scmi/scmi_pm_domain.c26
1 files changed, 26 insertions, 0 deletions
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 <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);