On 20 January 2016 at 16:08, Martin Fuzzey <mfuzzey@xxxxxxxxxxx> wrote:
> 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>
Thanks, applied for fixes!
Kind regards
Uffe
>
> ---
> 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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