linux-kernel - [PATCH v1 1/2] pinctrl: moorefield: Fix open-drain pin mode configuration

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Mon,  5 Jun 2023 18:45:22 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Andy Shevchenko <andy@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH v1 1/2] pinctrl: moorefield: Fix open-drain pin mode configuration

Currently the pin may not be configured as open-drain in some
cases because the argument may be 0 for the boolean types of
the pin configurations. Fix this by ignoring the argument.

With that, allow to actually restore pin to the push-pull mode.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/pinctrl/intel/pinctrl-moorefield.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/intel/pinctrl-moorefield.c b/drivers/pinctrl/intel/pinctrl-moorefield.c
index 3c9a8484b442..7656a5e20919 100644
--- a/drivers/pinctrl/intel/pinctrl-moorefield.c
+++ b/drivers/pinctrl/intel/pinctrl-moorefield.c
@@ -661,6 +661,11 @@ static int mofld_config_get(struct pinctrl_dev *pctldev, unsigned int pin,
 
 		break;
 
+	case PIN_CONFIG_DRIVE_PUSH_PULL:
+		if (value & BUFCFG_OD_EN)
+			return -EINVAL;
+		break;
+
 	case PIN_CONFIG_DRIVE_OPEN_DRAIN:
 		if (!(value & BUFCFG_OD_EN))
 			return -EINVAL;
@@ -734,10 +739,14 @@ static int mofld_config_set_pin(struct mofld_pinctrl *mp, unsigned int pin,
 
 		break;
 
+	case PIN_CONFIG_DRIVE_PUSH_PULL:
+		mask |= BUFCFG_OD_EN;
+		bits &= ~BUFCFG_OD_EN;
+		break;
+
 	case PIN_CONFIG_DRIVE_OPEN_DRAIN:
 		mask |= BUFCFG_OD_EN;
-		if (arg)
-			bits |= BUFCFG_OD_EN;
+		bits |= BUFCFG_OD_EN;
 		break;
 
 	case PIN_CONFIG_SLEW_RATE:
@@ -769,6 +778,7 @@ static int mofld_config_set(struct pinctrl_dev *pctldev, unsigned int pin,
 		case PIN_CONFIG_BIAS_DISABLE:
 		case PIN_CONFIG_BIAS_PULL_UP:
 		case PIN_CONFIG_BIAS_PULL_DOWN:
+		case PIN_CONFIG_DRIVE_PUSH_PULL:
 		case PIN_CONFIG_DRIVE_OPEN_DRAIN:
 		case PIN_CONFIG_SLEW_RATE:
 			ret = mofld_config_set_pin(mp, pin, configs[i]);
-- 
2.40.0.1.gaa8946217a0b