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authorMarek Szyprowski <m.szyprowski@samsung.com>2017-03-23 09:03:22 +0100
committerKrzysztof Kozlowski <krzk@kernel.org>2017-03-23 21:05:21 +0200
commit8fe9bf074268323353c4e44d6fdfff10204e14ba (patch)
treea9375db872d0af0da1778e6598bf6837e99c6975 /drivers/pinctrl
parentc1ae3cfa0e89fa1a7ecc4c99031f5e9ae99d9201 (diff)
pinctrl: samsung: Ensure that pad retention is disabled on driver init
When pin controller device is a part of power domain, there is no guarantee that the power domain was not turned off and then on during boot process before probing of the pin control driver. If it happened, then pin control driver should ensure that pad retention is turned off during its probe call. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Diffstat (limited to 'drivers/pinctrl')
-rw-r--r--drivers/pinctrl/samsung/pinctrl-exynos.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/pinctrl/samsung/pinctrl-exynos.c b/drivers/pinctrl/samsung/pinctrl-exynos.c
index f9b49967f512..fa8bdd9ae198 100644
--- a/drivers/pinctrl/samsung/pinctrl-exynos.c
+++ b/drivers/pinctrl/samsung/pinctrl-exynos.c
@@ -777,6 +777,7 @@ exynos_retention_init(struct samsung_pinctrl_drv_data *drvdata,
{
struct samsung_retention_ctrl *ctrl;
struct regmap *pmu_regs;
+ int i;
ctrl = devm_kzalloc(drvdata->dev, sizeof(*ctrl), GFP_KERNEL);
if (!ctrl)
@@ -794,6 +795,10 @@ exynos_retention_init(struct samsung_pinctrl_drv_data *drvdata,
ctrl->enable = exynos_retention_enable;
ctrl->disable = exynos_retention_disable;
+ /* Ensure that retention is disabled on driver init */
+ for (i = 0; i < ctrl->nr_regs; i++)
+ regmap_write(pmu_regs, ctrl->regs[i], ctrl->value);
+
return ctrl;
}