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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>
This commit is contained in:
Marek Szyprowski 2017-03-23 09:03:22 +01:00 committed by Krzysztof Kozlowski
parent c1ae3cfa0e
commit 8fe9bf0742
1 changed files with 5 additions and 0 deletions
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5
drivers/pinctrl/samsung/pinctrl-exynos.c
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@ -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;
}