The DT binding doc says reset-gpios is an optional property but the code
currently bails out if it is omitted.
This is a regression since it breaks previously working device trees.
Fix it by restoring the original documented behaviour.
Fixes: ce037275861e ("mmc: pwrseq_simple: use GPIO descriptors array API")
Tested-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Martin Fuzzey <mfuzzey@xxxxxxxxxxx>
---
V2:
Fix review comments by Ulf Hansson:
* Handle -ENOSYS case when CONFIG_GPIOLIB not selected
This causes checkpatch to complain with
"WARNING: ENOSYS means 'invalid syscall nr' and nothing else"
but I guess that's ok here.
* Update patch description to make it clear this is a regression fix
* Add Fixes tag
Add Tested-by tag from Tony Lingdren
---
drivers/mmc/core/pwrseq_simple.c | 22 ++++++++++++++--------
1 file changed, 14 insertions(+), 8 deletions(-)
diff --git a/drivers/mmc/core/pwrseq_simple.c b/drivers/mmc/core/pwrseq_simple.c
index d10538b..96f45ca 100644
--- a/drivers/mmc/core/pwrseq_simple.c
+++ b/drivers/mmc/core/pwrseq_simple.c
@@ -29,15 +29,18 @@ struct mmc_pwrseq_simple {
static void mmc_pwrseq_simple_set_gpios_value(struct mmc_pwrseq_simple *pwrseq,
int value)
{
- int i;
struct gpio_descs *reset_gpios = pwrseq->reset_gpios;
- int values[reset_gpios->ndescs];
- for (i = 0; i < reset_gpios->ndescs; i++)
- values[i] = value;
+ if (!IS_ERR(reset_gpios)) {
+ int i;
+ int values[reset_gpios->ndescs];
- gpiod_set_array_value_cansleep(reset_gpios->ndescs, reset_gpios->desc,
- values);
+ for (i = 0; i < reset_gpios->ndescs; i++)
+ values[i] = value;
+
+ gpiod_set_array_value_cansleep(
+ reset_gpios->ndescs, reset_gpios->desc, values);
+ }
}
static void mmc_pwrseq_simple_pre_power_on(struct mmc_host *host)
@@ -79,7 +82,8 @@ static void mmc_pwrseq_simple_free(struct mmc_host *host)
struct mmc_pwrseq_simple *pwrseq = container_of(host->pwrseq,
struct mmc_pwrseq_simple, pwrseq);
- gpiod_put_array(pwrseq->reset_gpios);
+ if (!IS_ERR(pwrseq->reset_gpios))
+ gpiod_put_array(pwrseq->reset_gpios);
if (!IS_ERR(pwrseq->ext_clk))
clk_put(pwrseq->ext_clk);
@@ -112,7 +116,9 @@ struct mmc_pwrseq *mmc_pwrseq_simple_alloc(struct mmc_host *host,
}
pwrseq->reset_gpios = gpiod_get_array(dev, "reset", GPIOD_OUT_HIGH);
- if (IS_ERR(pwrseq->reset_gpios)) {
+ if (IS_ERR(pwrseq->reset_gpios) &&
+ PTR_ERR(pwrseq->reset_gpios) != -ENOENT &&
+ PTR_ERR(pwrseq->reset_gpios) != -ENOSYS) {
ret = PTR_ERR(pwrseq->reset_gpios);
goto clk_put;
}
--
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