diff options
| author | Shawn Guo <shawn.guo@freescale.com> | 2013-07-14 21:52:38 +0800 |
|---|---|---|
| committer | Leonard Crestez <leonard.crestez@nxp.com> | 2018-08-23 16:42:32 +0300 |
| commit | 07f46bc0c978347cc578b5e232f2a154692bf6c4 (patch) | |
| tree | 8d320dfb48d6b3d3d72e65539358520722c79cc1 /drivers/gpio | |
| parent | 890e978e54b5f0f125b3cd981faee463ac8ad45e (diff) | |
MLK-11293: gpio: pca953x: add device_reset() call
The pca953x type of devices, e.g. max7310, may have a reset which needs
to be handled to get the device start working. Add a device_reset()
call for that, and defer the probe if the reset controller for that is
not ready yet.
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Signed-off-by: Fugang Duan <B38611@freescale.com>
(cherry picked from commit: d3264091b30b777d94a18efda9823a06668d5b10)
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-pca953x.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index fe731f094257..f0bb7b5aabb6 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -17,6 +17,7 @@ #include <linux/interrupt.h> #include <linux/i2c.h> #include <linux/platform_data/pca953x.h> +#include <linux/reset.h> #include <linux/slab.h> #include <asm/unaligned.h> #include <linux/of_platform.h> @@ -813,6 +814,10 @@ static int pca953x_probe(struct i2c_client *client, lockdep_set_subclass(&chip->i2c_lock, i2c_adapter_depth(client->adapter)); + ret = device_reset(&client->dev); + if (ret == -ENODEV) + return -EPROBE_DEFER; + /* initialize cached registers from their original values. * we can't share this chip with another i2c master. */ |