linux-kernel - [PATCH] leds: pca9532: Assign gpio base dynamically

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Message-Id: <20210414115124.91416-1-s.riedmueller@phytec.de>
Date:   Wed, 14 Apr 2021 13:51:24 +0200
From:   Stefan Riedmueller <s.riedmueller@...tec.de>
To:     Riku Voipio <riku.voipio@....fi>, Pavel Machek <pavel@....cz>
Cc:     linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org,
        Stefan Riedmueller <s.riedmueller@...tec.de>
Subject: [PATCH] leds: pca9532: Assign gpio base dynamically

When using devicetree, gpio_base holds its initial zero value which can
lead to a rejection if another gpio controller already occupies this
base. To prevent that collision let the gpio base be assigned dynamically.

Signed-off-by: Stefan Riedmueller <s.riedmueller@...tec.de>
---
 drivers/leds/leds-pca9532.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/leds/leds-pca9532.c b/drivers/leds/leds-pca9532.c
index 27d027165472..017794bb87ae 100644
--- a/drivers/leds/leds-pca9532.c
+++ b/drivers/leds/leds-pca9532.c
@@ -480,6 +480,8 @@ pca9532_of_populate_pdata(struct device *dev, struct device_node *np)
 	if (!pdata)
 		return ERR_PTR(-ENOMEM);
 
+	pdata->gpio_base = -1;
+
 	of_property_read_u8_array(np, "nxp,pwm", &pdata->pwm[0],
 				  ARRAY_SIZE(pdata->pwm));
 	of_property_read_u8_array(np, "nxp,psc", &pdata->psc[0],
-- 
2.25.1