[PATCH] pinctrl: samsung: add pinctrl_force_sleep() for "sleep" pinctrl state
From: 남영민 <hidden>
Date: 2017-09-21 12:32:33
Also in:
linux-gpio, linux-samsung-soc
Subsystem:
pin control subsystem, pin controller - samsung, the rest · Maintainers:
Linus Walleij, Krzysztof Kozlowski, Sylwester Nawrocki, Peter Griffin, Linus Torvalds
This patch adds pinctrl_for_sleep() in samsung_pinctrl_suspend()
to support configuration of "sleep" pinctrl state.
For example, we can configure "sleep" pinctrl state of "gpf1-6"
as "INPUT, PULL DOWN" by configuring power down mode register.
&pinctrl_5 {
pinctrl-names = "default","sleep";
pinctrl-0 = <&initial5>;
pinctrl-1 = <&sleep5>;
initial5: initial-state {
samsung,pins = gpf1-6;
samsung,pin-function = <EXYNOS_PIN_FUNC_INPUT>;
};
sleep5: sleep-state {
samsung,pins = gpf1-6;
samsung,pin-con-pdn = <EXYNOS_PIN_PDN_INPUT>;
samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_DOWN>;
};
};
Signed-off-by: Youngmin Nam <redacted>
---
drivers/pinctrl/samsung/pinctrl-samsung.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.c b/drivers/pinctrl/samsung/pinctrl-samsung.c
index e04f7fe0a65d..b4d12f8db475 100644
--- a/drivers/pinctrl/samsung/pinctrl-samsung.c
+++ b/drivers/pinctrl/samsung/pinctrl-samsung.c@@ -1099,6 +1099,11 @@ static int __maybe_unused samsung_pinctrl_suspend(struct device *dev) { struct samsung_pinctrl_drv_data *drvdata = dev_get_drvdata(dev); int i; + int ret; + + ret = pinctrl_force_sleep(drvdata->pctl_dev); + if (ret) + dev_err(dev, "could not set sleep pinstate %d\n", ret); for (i = 0; i < drvdata->nr_banks; i++) { struct samsung_pin_bank *bank = &drvdata->pin_banks[i];
@@ -1187,6 +1192,11 @@ static int __maybe_unused samsung_pinctrl_resume(struct device *dev) if (drvdata->retention_ctrl && drvdata->retention_ctrl->disable) drvdata->retention_ctrl->disable(drvdata); + /* For changing state without writing register. */ + if (!IS_ERR(drvdata->pctl_dev->p) && + !IS_ERR(drvdata->pctl_dev->hog_default)) + drvdata->pctl_dev->p->state = drvdata->pctl_dev->hog_default; + return 0; }
--
2.13.0