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[1/2] video: ssd1307fb: Use gpiod_set_value_cansleep() for reset

Message ID 1537348724-22976-1-git-send-email-michal.vokac@ysoft.com (mailing list archive)
State New, archived
Headers show
Series [1/2] video: ssd1307fb: Use gpiod_set_value_cansleep() for reset | expand

Commit Message

Michal Vokáč Sept. 19, 2018, 9:18 a.m. UTC 
The reset signal can be produced by GPIO expander that can sleep.
In that case the probe function fails. Allow using GPIO expanders for
the reset signal by using the non-atomic gpiod_set_value_cansleep()
function.

Signed-off-by: Michal Vokáč <michal.vokac@ysoft.com>
---
 drivers/video/fbdev/ssd1307fb.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

Fabio Estevam Sept. 19, 2018, 12:11 p.m. UTC | #1 
Hi Michal,

On Wed, Sep 19, 2018 at 6:18 AM, Michal Vokáč <michal.vokac@ysoft.com> wrote:
> The reset signal can be produced by GPIO expander that can sleep.
> In that case the probe function fails. Allow using GPIO expanders for
> the reset signal by using the non-atomic gpiod_set_value_cansleep()
> function.
>
> Signed-off-by: Michal Vokáč <michal.vokac@ysoft.com>

Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
diff mbox series

Patch

diff --git a/drivers/video/fbdev/ssd1307fb.c b/drivers/video/fbdev/ssd1307fb.c
index ba66c02..e7ae135 100644
--- a/drivers/video/fbdev/ssd1307fb.c
+++ b/drivers/video/fbdev/ssd1307fb.c
@@ -728,9 +728,9 @@  static int ssd1307fb_probe(struct i2c_client *client,
 
 	if (par->reset) {
 		/* Reset the screen */
-		gpiod_set_value(par->reset, 0);
+		gpiod_set_value_cansleep(par->reset, 0);
 		udelay(4);
-		gpiod_set_value(par->reset, 1);
+		gpiod_set_value_cansleep(par->reset, 1);
 		udelay(4);
 	}