From: youngmin.nam@samsung.com (=?UTF-8?B?64Ko7JiB66+8?=) Date: Thu, 21 Sep 2017 21:32:29 +0900 Subject: [PATCH] pinctrl: samsung: add pinctrl_force_sleep() for "sleep" pinctrl state References: Message-ID: <006801d332d5$b0ca09d0$125e1d70$@samsung.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 = ; }; sleep5: sleep-state { samsung,pins = gpf1-6; samsung,pin-con-pdn = ; samsung,pin-pud-pdn = ; }; }; Signed-off-by: Youngmin Nam --- 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