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From: Conor Dooley <conor@kernel.org>
To: linux-gpio@vger.kernel.org
Cc: conor@kernel.org, Conor Dooley <conor.dooley@microchip.com>,
	Daire McNamara <daire.mcnamara@microchip.com>,
	Linus Walleij <linusw@kernel.org>,
	linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
	Valentina.FernandezAlanis@microchip.com, stable@vger.kernel.org
Subject: [PATCH v1 2/3] pinctrl: mpfs-mssio: fix width of unused bank voltage setting
Date: Mon, 31 Aug 2026 11:50:58 +0100	[thread overview]
Message-ID: <20260831105056.756259-7-conor@kernel.org> (raw)
In-Reply-To: <20260831105056.756259-5-conor@kernel.org>

From: Conor Dooley <conor.dooley@microchip.com>

The bank voltages are only 4 bits wide, so when a pin was unused the
driver was not correctly interpreting it as being at zero volts, because
the driver's value for unused had two extra set bits.

CC: stable@vger.kernel.org
Fixes: 488d704ed7b7 ("pinctrl: add polarfire soc mssio pinctrl driver")
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
---
 drivers/pinctrl/microchip/pinctrl-mpfs-mssio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pinctrl/microchip/pinctrl-mpfs-mssio.c b/drivers/pinctrl/microchip/pinctrl-mpfs-mssio.c
index 502624221aca..9e6d233804cb 100644
--- a/drivers/pinctrl/microchip/pinctrl-mpfs-mssio.c
+++ b/drivers/pinctrl/microchip/pinctrl-mpfs-mssio.c
@@ -86,7 +86,7 @@ static struct mpfs_pinctrl_bank_voltage mpfs_pinctrl_bank_voltages[8] = {
 	{ .uv = 1800000, .val = 4 },
 	{ .uv = 2500000, .val = 6 },
 	{ .uv = 3300000, .val = 8 },
-	{ .uv = 0, .val = 0x3f }, // pin unused
+	{ .uv = 0, .val = 0xf }, // pin unused
 };
 
 static int mpfs_pinctrl_get_drive_strength_ma(u32 drive_strength)
-- 
2.53.0


WARNING: multiple messages have this Message-ID (diff)
From: Conor Dooley <conor@kernel.org>
To: linux-gpio@vger.kernel.org
Cc: conor@kernel.org, Conor Dooley <conor.dooley@microchip.com>,
	Daire McNamara <daire.mcnamara@microchip.com>,
	Linus Walleij <linusw@kernel.org>,
	linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
	Valentina.FernandezAlanis@microchip.com, stable@vger.kernel.org
Subject: [PATCH v1 2/3] pinctrl: mpfs-mssio: fix width of unused bank voltage setting
Date: Mon, 31 Aug 2026 11:50:58 +0100	[thread overview]
Message-ID: <20260831105056.756259-7-conor@kernel.org> (raw)
In-Reply-To: <20260831105056.756259-5-conor@kernel.org>

From: Conor Dooley <conor.dooley@microchip.com>

The bank voltages are only 4 bits wide, so when a pin was unused the
driver was not correctly interpreting it as being at zero volts, because
the driver's value for unused had two extra set bits.

CC: stable@vger.kernel.org
Fixes: 488d704ed7b7 ("pinctrl: add polarfire soc mssio pinctrl driver")
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
---
 drivers/pinctrl/microchip/pinctrl-mpfs-mssio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pinctrl/microchip/pinctrl-mpfs-mssio.c b/drivers/pinctrl/microchip/pinctrl-mpfs-mssio.c
index 502624221aca..9e6d233804cb 100644
--- a/drivers/pinctrl/microchip/pinctrl-mpfs-mssio.c
+++ b/drivers/pinctrl/microchip/pinctrl-mpfs-mssio.c
@@ -86,7 +86,7 @@ static struct mpfs_pinctrl_bank_voltage mpfs_pinctrl_bank_voltages[8] = {
 	{ .uv = 1800000, .val = 4 },
 	{ .uv = 2500000, .val = 6 },
 	{ .uv = 3300000, .val = 8 },
-	{ .uv = 0, .val = 0x3f }, // pin unused
+	{ .uv = 0, .val = 0xf }, // pin unused
 };
 
 static int mpfs_pinctrl_get_drive_strength_ma(u32 drive_strength)
-- 
2.53.0


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  parent reply	other threads:[~2026-08-31 10:51 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-31 10:50 [PATCH v1 0/3] pinctrl: mpfs-mssio: three fixes Conor Dooley
2026-08-31 10:50 ` Conor Dooley
2026-08-31 10:50 ` [PATCH v1 1/3] pinctrl: mpfs-mssio: fix whitespace in debugfs output Conor Dooley
2026-08-31 10:50   ` Conor Dooley
2026-08-31 10:50 ` Conor Dooley [this message]
2026-08-31 10:50   ` [PATCH v1 2/3] pinctrl: mpfs-mssio: fix width of unused bank voltage setting Conor Dooley
2026-08-31 10:50 ` [PATCH v1 3/3] pinctrl: mpfs-mssio: use correct regmap function to set bank voltage Conor Dooley
2026-08-31 10:50   ` Conor Dooley
2026-09-14  9:10 ` [PATCH v1 0/3] pinctrl: mpfs-mssio: three fixes Linus Walleij
2026-09-14  9:10   ` Linus Walleij

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