drm/tinydrm/mipi-dbi: Change reset active time

The MIPI DBI spec states that reset active/low time should be more
than 9us. Change from 20ms to 20us.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Reviewed-by: David Lechner <david@lechnology.com>
Tested-by: David Lechner <david@lechnology.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180110185940.53841-8-noralf@tronnes.org

diff --git a/drivers/gpu/drm/tinydrm/mipi-dbi.c b/drivers/gpu/drm/tinydrm/mipi-dbi.c
index 6798b48374410467bd37702a0c6b0420917208a1..75dd65c57e74be09804157b087484635b6fd8692 100644 (file)
--- a/drivers/gpu/drm/tinydrm/mipi-dbi.c
+++ b/drivers/gpu/drm/tinydrm/mipi-dbi.c
@@ -414,7 +414,7 @@ void mipi_dbi_hw_reset(struct mipi_dbi *mipi)
                return;
 
        gpiod_set_value_cansleep(mipi->reset, 0);
-       msleep(20);
+       usleep_range(20, 1000);
        gpiod_set_value_cansleep(mipi->reset, 1);
        msleep(120);
 }