diff mbox series

[RFC,2/2] clk: qcom: gdsc: Add support for set_hwmode_dev

Message ID 20230627104033.3345659-2-abel.vesa@linaro.org
State Superseded
Headers show
Series [RFC,1/2] PM: domains: Allow devices attached to genpd to be managed by HW | expand

Commit Message

Abel Vesa June 27, 2023, 10:40 a.m. UTC 
Implement the GDSC specific genpd set_hwmode_dev callback in order to
switch the HW control on or off. For any GDSC that supports HW control
set this callback in order to allow its consumers to control it.

Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
---
 drivers/clk/qcom/gdsc.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
diff mbox series

Patch

diff --git a/drivers/clk/qcom/gdsc.c b/drivers/clk/qcom/gdsc.c
index 5358e28122ab..9a04bf2e4379 100644
--- a/drivers/clk/qcom/gdsc.c
+++ b/drivers/clk/qcom/gdsc.c
@@ -314,6 +314,26 @@  static int gdsc_enable(struct generic_pm_domain *domain)
 	return 0;
 }
 
+static int gdsc_set_hwmode_dev(struct generic_pm_domain *domain,
+			       struct device *dev, bool enable)
+{
+	int ret = gdsc_hwctrl(domain_to_gdsc(domain), enable);
+
+	if (ret)
+		goto out;
+
+	/*
+	 * Wait for the GDSC to go through a power down and
+	 * up cycle.  In case there is a status polling going on
+	 * before the power cycle is completed it might read an
+	 * wrong status value.
+	 */
+	udelay(1);
+
+out:
+	return ret;
+}
+
 static int gdsc_disable(struct generic_pm_domain *domain)
 {
 	struct gdsc *sc = domain_to_gdsc(domain);
@@ -451,6 +471,8 @@  static int gdsc_init(struct gdsc *sc)
 		sc->pd.power_off = gdsc_disable;
 	if (!sc->pd.power_on)
 		sc->pd.power_on = gdsc_enable;
+	if (sc->flags & HW_CTRL)
+		sc->pd.set_hwmode_dev = gdsc_set_hwmode_dev;
 
 	ret = pm_genpd_init(&sc->pd, NULL, !on);
 	if (ret)