linux-kernel - [PATCH 2/3] regulator: max8973: make default/unset dvs gpio as invalid gpio

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Date:	Mon, 20 Apr 2015 18:24:16 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	<broonie@...nel.org>, <robh+dt@...nel.org>, <mark.rutland@....com>,
	<ijc+devicetree@...lion.org.uk>, <galak@...eaurora.org>,
	<lgirdwood@...il.com>
CC:	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Laxman Dewangan <ldewangan@...dia.com>
Subject: [PATCH 2/3] regulator: max8973: make default/unset dvs gpio as invalid gpio

If platform data has dvs-gpio value 0 as default/unset then
make this as invalid gpio so that function gpio_is_valid()
can return false on this case.

Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>
---
As discussed on the patch
[PATCH] regulator: max8973: get rid of extra variable for gpio validity
Adding handling of unset/default gpio on platform data which is set as
0.

 drivers/regulator/max8973-regulator.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/max8973-regulator.c b/drivers/regulator/max8973-regulator.c
index 1890808..85fa2de 100644
--- a/drivers/regulator/max8973-regulator.c
+++ b/drivers/regulator/max8973-regulator.c
@@ -408,7 +408,7 @@ static int max8973_probe(struct i2c_client *client,
 	}
 
 	if (pdata) {
-		max->dvs_gpio = pdata->dvs_gpio;
+		max->dvs_gpio = (pdata->dvs_gpio) ? pdata->dvs_gpio : -EINVAL;
 		max->enable_external_control = pdata->enable_ext_control;
 		max->curr_gpio_val = pdata->dvs_def_state;
 		max->curr_vout_reg = MAX8973_VOUT + pdata->dvs_def_state;
-- 
1.8.1.5

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