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| author | Zhiyong Tao <zhiyong.tao@mediatek.com> | 2021-03-21 06:31:50 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2021-03-25 12:14:50 +0300 |
| commit | 42a46434e9b18b35d2e57433cdbeff3233ca9765 (patch) | |
| tree | 2ae95aa6a5a8d58de13a40b233e859c853d861c3 /drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h | |
| parent | 1517dad8e7129c5e28bd7b536c560f0f0bff87a4 (diff) | |
| download | linux-42a46434e9b18b35d2e57433cdbeff3233ca9765.tar.xz | |
pinctrl: add lock in mtk_rmw function.
When multiple threads operate on the same register resource
which include multiple pin, It will make the register resource
wrong to control. So we add lock to avoid the case.
Signed-off-by: Zhiyong Tao <zhiyong.tao@mediatek.com>
Link: https://lore.kernel.org/r/20210321033150.15380-2-zhiyong.tao@mediatek.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h')
| -rw-r--r-- | drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h index e2aae285b5fc..65eac708a3b3 100644 --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h @@ -251,6 +251,8 @@ struct mtk_pinctrl { struct mtk_eint *eint; struct mtk_pinctrl_group *groups; const char **grp_names; + /* lock pin's register resource to avoid multiple threads issue*/ + struct mutex lock; }; void mtk_rmw(struct mtk_pinctrl *pctl, u8 i, u32 reg, u32 mask, u32 set); |