[PATCH V2] mmc: pwrseq_simple: Make reset-gpios optional to match doc
From: Ulf Hansson <hidden>
Date: 2016-01-21 13:23:38
Also in:
linux-mmc, linux-omap
On 20 January 2016 at 16:08, Martin Fuzzey [off-list ref] 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@atomide.com>
Signed-off-by: Martin Fuzzey <redacted>Thanks, applied for fixes! Kind regards Uffe
quoted hunk ↗ jump to hunk
--- 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; }