linux-kernel - [PATCH 2/6] pinctrl: uniphier: fix pin_config

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Message-Id: <1501482071-9819-3-git-send-email-yamada.masahiro@socionext.com>
Date:   Mon, 31 Jul 2017 15:21:07 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     linux-gpio@...r.kernel.org
Cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/6] pinctrl: uniphier: fix pin_config_get() for input-enable

For LD11/LD20 SoCs (capable of per-pin input enable), iectrl bits are
located across multiple registers.  So, the register offset must be
taken into account.  Otherwise, wrong input-enable status is displayed.

While we here, rename the macro because it is a base address.

Fixes: aa543888ca8c ("pinctrl: uniphier: support per-pin input enable for new SoCs")
Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---

 drivers/pinctrl/uniphier/pinctrl-uniphier-core.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c
index c649e835bd54..f2f0f9dcfec3 100644
--- a/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c
@@ -32,7 +32,7 @@
 #define UNIPHIER_PINCTRL_DRV2CTRL_BASE	0x1900
 #define UNIPHIER_PINCTRL_DRV3CTRL_BASE	0x1980
 #define UNIPHIER_PINCTRL_PUPDCTRL_BASE	0x1a00
-#define UNIPHIER_PINCTRL_IECTRL		0x1d00
+#define UNIPHIER_PINCTRL_IECTRL_BASE	0x1d00
 
 struct uniphier_pinctrl_priv {
 	struct pinctrl_desc pctldesc;
@@ -252,18 +252,21 @@ static int uniphier_conf_pin_input_enable_get(struct pinctrl_dev *pctldev,
 {
 	struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
 	unsigned int iectrl = uniphier_pin_get_iectrl(desc->drv_data);
-	unsigned int val;
+	unsigned int reg, mask, val;
 	int ret;
 
 	if (iectrl == UNIPHIER_PIN_IECTRL_NONE)
 		/* This pin is always input-enabled. */
 		return 0;
 
-	ret = regmap_read(priv->regmap, UNIPHIER_PINCTRL_IECTRL, &val);
+	reg = UNIPHIER_PINCTRL_IECTRL_BASE + iectrl / 32 * 4;
+	mask = BIT(iectrl % 32);
+
+	ret = regmap_read(priv->regmap, reg, &val);
 	if (ret)
 		return ret;
 
-	return val & BIT(iectrl) ? 0 : -EINVAL;
+	return val & mask ? 0 : -EINVAL;
 }
 
 static int uniphier_conf_pin_config_get(struct pinctrl_dev *pctldev,
@@ -456,7 +459,7 @@ static int uniphier_conf_pin_input_enable(struct pinctrl_dev *pctldev,
 	if (iectrl == UNIPHIER_PIN_IECTRL_NONE)
 		return enable ? 0 : -EINVAL;
 
-	reg = UNIPHIER_PINCTRL_IECTRL + iectrl / 32 * 4;
+	reg = UNIPHIER_PINCTRL_IECTRL_BASE + iectrl / 32 * 4;
 	mask = BIT(iectrl % 32);
 
 	return regmap_update_bits(priv->regmap, reg, mask, enable ? mask : 0);
-- 
2.7.4