pinctrl: mediatek: Fix multiple registration issue.

Since our common driver need support main chip and PMU
at the same time, that means it will register two
pinctrl device, and the pinctrl_desc structure should
be used two times.

But pinctrl_desc use global static definition, then
the latest registered pinctrl device will overwrite
the old one's, all members in pinctrl_desc will set to
the new one's, such as name, pins and pins numbers, etc.
This is a bug.

Move pinctrl_desc into mtk_pinctrl, assign new value for
each pinctrl device to fix it.

Cc: stable@vger.kernel.org # v4.1+
Signed-off-by: Hongzhou Yang <hongzhou.yang@mediatek.com>
Reviewed-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

2 files changed, 11 insertions, 11 deletions

diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
index 23f2de07f598..f6cdeee6e63b 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
@@ -1202,12 +1202,6 @@ static int mtk_pctrl_build_state(struct platform_device *pdev)
         return 0;
 }
 
-static struct pinctrl_desc mtk_pctrl_desc = {
-        .confops        = &mtk_pconf_ops,
-        .pctlops        = &mtk_pctrl_ops,
-        .pmxops         = &mtk_pmx_ops,
-};
-
 int mtk_pctrl_init(struct platform_device *pdev,
                 const struct mtk_pinctrl_devdata *data,
                 struct regmap *regmap)
@@ -1265,12 +1259,17 @@ int mtk_pctrl_init(struct platform_device *pdev,
 
         for (i = 0; i < pctl->devdata->npins; i++)
                 pins[i] = pctl->devdata->pins[i].pin;
-        mtk_pctrl_desc.name = dev_name(&pdev->dev);
-        mtk_pctrl_desc.owner = THIS_MODULE;
-        mtk_pctrl_desc.pins = pins;
-        mtk_pctrl_desc.npins = pctl->devdata->npins;
+
+        pctl->pctl_desc.name = dev_name(&pdev->dev);
+        pctl->pctl_desc.owner = THIS_MODULE;
+        pctl->pctl_desc.pins = pins;
+        pctl->pctl_desc.npins = pctl->devdata->npins;
+        pctl->pctl_desc.confops = &mtk_pconf_ops;
+        pctl->pctl_desc.pctlops = &mtk_pctrl_ops;
+        pctl->pctl_desc.pmxops = &mtk_pmx_ops;
         pctl->dev = &pdev->dev;
-        pctl->pctl_dev = pinctrl_register(&mtk_pctrl_desc, &pdev->dev, pctl);
+
+        pctl->pctl_dev = pinctrl_register(&pctl->pctl_desc, &pdev->dev, pctl);
         if (IS_ERR(pctl->pctl_dev)) {
                 dev_err(&pdev->dev, "couldn't register pinctrl driver\n");
                 return PTR_ERR(pctl->pctl_dev);
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.h b/drivers/pinctrl/mediatek/pinctrl-mtk-common.h
index 30213e514c2f..c532c23c70b4 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.h
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.h
@@ -256,6 +256,7 @@ struct mtk_pinctrl_devdata {
 struct mtk_pinctrl {
         struct regmap   *regmap1;
         struct regmap   *regmap2;
+        struct pinctrl_desc pctl_desc;
         struct device           *dev;
         struct gpio_chip        *chip;
         struct mtk_pinctrl_group        *groups;