[PATCH 2/2] drm/tiny: panel-mipi-dbi: Allow sharing the D/C GPIO
Otto Pflüger
otto.pflueger at abscue.de
Wed Jul 19 09:53:43 UTC 2023
Displays that are connected to the same SPI bus may share the D/C GPIO.
Use GPIOD_FLAGS_BIT_NONEXCLUSIVE to allow access to the same GPIO for
multiple panel-mipi-dbi instances. Exclusive access to the GPIO during
transfers is ensured by the locking in drm_mipi_dbi.c.
Signed-off-by: Otto Pflüger <otto.pflueger at abscue.de>
---
drivers/gpu/drm/tiny/panel-mipi-dbi.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/tiny/panel-mipi-dbi.c b/drivers/gpu/drm/tiny/panel-mipi-dbi.c
index eb9f13f18a02..e616e3890043 100644
--- a/drivers/gpu/drm/tiny/panel-mipi-dbi.c
+++ b/drivers/gpu/drm/tiny/panel-mipi-dbi.c
@@ -307,7 +307,8 @@ static int panel_mipi_dbi_spi_probe(struct spi_device *spi)
if (IS_ERR(dbi->reset))
return dev_err_probe(dev, PTR_ERR(dbi->reset), "Failed to get GPIO 'reset'\n");
- dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
+ dc = devm_gpiod_get_optional(dev, "dc",
+ GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE);
if (IS_ERR(dc))
return dev_err_probe(dev, PTR_ERR(dc), "Failed to get GPIO 'dc'\n");
--
2.39.1
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