diff mbox series

[3/7] pinctrl: mt7622: fix that pinctrl_claim_hogs cannot work

Message ID 3b1fa378e0a83a5f39497fe8efaf4c992507ed5d.1529639050.git.sean.wang@mediatek.com
State New
Headers show
Series [1/7] pinctrl: mt7622: fix error path on failing at groups building | expand

Commit Message

Sean Wang June 22, 2018, 3:49 a.m. UTC 
From: Sean Wang <sean.wang@mediatek.com>

To allow claiming hogs by pinctrl, we cannot enable pinctrl until all
groups and functions are being added done. Also, it's necessary that
the corresponding gpiochip is being added when the pinctrl device is
enabled.

Cc: stable@vger.kernel.org
Fixes: d6ed93551320 ("pinctrl: mediatek: add pinctrl driver for MT7622 SoC")
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
---
 drivers/pinctrl/mediatek/pinctrl-mt7622.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

Comments

Linus Walleij June 29, 2018, 12:19 p.m. UTC | #1 
On Fri, Jun 22, 2018 at 5:49 AM <sean.wang@mediatek.com> wrote:

> From: Sean Wang <sean.wang@mediatek.com>
>
> To allow claiming hogs by pinctrl, we cannot enable pinctrl until all
> groups and functions are being added done. Also, it's necessary that
> the corresponding gpiochip is being added when the pinctrl device is
> enabled.
>
> Cc: stable@vger.kernel.org
> Fixes: d6ed93551320 ("pinctrl: mediatek: add pinctrl driver for MT7622 SoC")
> Signed-off-by: Sean Wang <sean.wang@mediatek.com>

Patch applied for fixes.

Yours,
Linus Walleij
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diff mbox series

Patch

diff --git a/drivers/pinctrl/mediatek/pinctrl-mt7622.c b/drivers/pinctrl/mediatek/pinctrl-mt7622.c
index e9eba62..42155d4 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mt7622.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mt7622.c
@@ -1695,9 +1695,10 @@  static int mtk_pinctrl_probe(struct platform_device *pdev)
 	mtk_desc.custom_conf_items = mtk_conf_items;
 #endif
 
-	hw->pctrl = devm_pinctrl_register(&pdev->dev, &mtk_desc, hw);
-	if (IS_ERR(hw->pctrl))
-		return PTR_ERR(hw->pctrl);
+	err = devm_pinctrl_register_and_init(&pdev->dev, &mtk_desc, hw,
+					     &hw->pctrl);
+	if (err)
+		return err;
 
 	/* Setup groups descriptions per SoC types */
 	err = mtk_build_groups(hw);
@@ -1713,11 +1714,19 @@  static int mtk_pinctrl_probe(struct platform_device *pdev)
 		return err;
 	}
 
+	/* For able to make pinctrl_claim_hogs, we must not enable pinctrl
+	 * until all groups and functions are being added one.
+	 */
+	err = pinctrl_enable(hw->pctrl);
+	if (err)
+		return err;
+
 	err = mtk_build_eint(hw, pdev);
 	if (err)
 		dev_warn(&pdev->dev,
 			 "Failed to add EINT, but pinctrl still can work\n");
 
+	/* Build gpiochip should be after pinctrl_enable is done */
 	err = mtk_build_gpiochip(hw, pdev->dev.of_node);
 	if (err) {
 		dev_err(&pdev->dev, "Failed to add gpio_chip\n");