linux-kernel - [PATCH] pinctrl: armada-37xx: Add comment for pcie1

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Date:   Fri, 24 Jul 2020 15:24:57 +0200
From:   Pali Rohár <pali@...nel.org>
To:     Jason Cooper <jason@...edaemon.net>, Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>
Cc:     linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org
Subject: [PATCH] pinctrl: armada-37xx: Add comment for pcie1_reset pin group

Group name 'pcie1' is misleading as it controls only PCIe reset pin. Like
other PCIe groups it should have been called 'pcie1_reset'. But due to
backward compatibility it is not possible to change existing group name.
So just add comment describing this PCIe reset functionality.

Signed-off-by: Pali Rohár <pali@...nel.org>
---
 arch/arm64/boot/dts/marvell/armada-37xx.dtsi | 2 +-
 drivers/pinctrl/mvebu/pinctrl-armada-37xx.c  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/marvell/armada-37xx.dtsi b/arch/arm64/boot/dts/marvell/armada-37xx.dtsi
index 2bbc69b4dc99..d5b6c0a1c54a 100644
--- a/arch/arm64/boot/dts/marvell/armada-37xx.dtsi
+++ b/arch/arm64/boot/dts/marvell/armada-37xx.dtsi
@@ -316,7 +316,7 @@
 				};
 
 				pcie_reset_pins: pcie-reset-pins {
-					groups = "pcie1";
+					groups = "pcie1"; /* this actually controls "pcie1_reset" */
 					function = "gpio";
 				};
 
diff --git a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
index 5f125bd6279d..8fd8b2af9216 100644
--- a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
+++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
@@ -196,7 +196,7 @@ static struct armada_37xx_pin_group armada_37xx_sb_groups[] = {
 	PIN_GRP_GPIO("sdio_sb", 24, 6, BIT(2), "sdio"),
 	PIN_GRP_GPIO("rgmii", 6, 12, BIT(3), "mii"),
 	PIN_GRP_GPIO("smi", 18, 2, BIT(4), "smi"),
-	PIN_GRP_GPIO("pcie1", 3, 1, BIT(5), "pcie"),
+	PIN_GRP_GPIO("pcie1", 3, 1, BIT(5), "pcie"), /* this actually controls "pcie1_reset" */
 	PIN_GRP_GPIO("pcie1_clkreq", 4, 1, BIT(9), "pcie"),
 	PIN_GRP_GPIO("pcie1_wakeup", 5, 1, BIT(10), "pcie"),
 	PIN_GRP_GPIO("ptp", 20, 3, BIT(11) | BIT(12) | BIT(13), "ptp"),
-- 
2.20.1