linux-kernel - [PATCH 2/2] leds: lp55xx: initialise output direction from dts

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Date:   Sun, 12 Dec 2021 23:40:07 +0100
From:   Merlijn Wajer <merlijn@...zup.org>
To:     merlijn@...zup.org
Cc:     Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
        Dev Null <devnull@...s.xyz>, Tony Lindgren <tony@...mide.com>,
        Sebastian Reichel <sre@...nel.org>,
        Pavel Machek <pavel@....cz>, Doug Zobel <dougdev334@...il.com>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Dan Murphy <dmurphy@...com>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] leds: lp55xx: initialise output direction from dts

Commit a5d3d1adc95f ("leds: lp55xx: Initialize enable GPIO direction to
output") attempts to fix this, but the fix did not work since at least
for the Nokia N900 the value needs to be set to HIGH, per the device
tree. So rather than hardcoding the value to a potentially invalid value
for some devices, let's set direction in lp55xx_init_device.

Fixes: a5d3d1adc95f ("leds: lp55xx: Initialize enable GPIO direction to output")
Fixes: 92a81562e695 ("leds: lp55xx: Add multicolor framework support to lp55xx")
Fixes: ac219bf3c9bd ("leds: lp55xx: Convert to use GPIO descriptors")
Signed-off-by: Merlijn Wajer <merlijn@...zup.org>
---
 drivers/leds/leds-lp55xx-common.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c
index d1657c46ee2f..9fdfc1b9a1a0 100644
--- a/drivers/leds/leds-lp55xx-common.c
+++ b/drivers/leds/leds-lp55xx-common.c
@@ -439,6 +439,8 @@ int lp55xx_init_device(struct lp55xx_chip *chip)
 		return -EINVAL;
 
 	if (pdata->enable_gpiod) {
+		gpiod_direction_output(pdata->enable_gpiod, 0);
+
 		gpiod_set_consumer_name(pdata->enable_gpiod, "LP55xx enable");
 		gpiod_set_value(pdata->enable_gpiod, 0);
 		usleep_range(1000, 2000); /* Keep enable down at least 1ms */
@@ -694,7 +696,7 @@ struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev,
 	of_property_read_u8(np, "clock-mode", &pdata->clock_mode);
 
 	pdata->enable_gpiod = devm_gpiod_get_optional(dev, "enable",
-						      GPIOD_OUT_LOW);
+						      GPIOD_ASIS);
 	if (IS_ERR(pdata->enable_gpiod))
 		return ERR_CAST(pdata->enable_gpiod);
 
-- 
2.32.0