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| author | Luhua Xu <luhua.xu@mediatek.com> | 2019-10-30 17:03:54 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-10-31 14:20:58 +0100 |
| commit | d948e6ca189985495a21cd622c31e30e72b6b688 (patch) | |
| tree | 96e13ac26e6f25d1d860ea133d87f2928579a2ea /drivers/spi/spi.c | |
| parent | c618a90dcaf3ffd37ec3b16451297e90a1a8395c (diff) | |
| download | linux-d948e6ca189985495a21cd622c31e30e72b6b688.tar.gz | |
spi: add power control when set_cs
As to set_cs takes effect immediately, power spi is needed when setup spi. Cc: Mark Brown <broonie@kernel.org> Signed-off-by: Luhua Xu <luhua.xu@mediatek.com> Link: https://lore.kernel.org/r/1572426234-30019-1-git-send-email-luhua.xu@mediatek.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi.c')
| -rw-r--r-- | drivers/spi/spi.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 5ba19ef809c2..294d0038eea6 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -3261,7 +3261,20 @@ int spi_setup(struct spi_device *spi) if (spi->controller->setup) status = spi->controller->setup(spi); - spi_set_cs(spi, false); + if (spi->controller->auto_runtime_pm && spi->controller->set_cs) { + status = pm_runtime_get_sync(spi->controller->dev.parent); + if (status < 0) { + pm_runtime_put_noidle(spi->controller->dev.parent); + dev_err(&spi->controller->dev, "Failed to power device: %d\n", + status); + return status; + } + spi_set_cs(spi, false); + pm_runtime_mark_last_busy(spi->controller->dev.parent); + pm_runtime_put_autosuspend(spi->controller->dev.parent); + } else { + spi_set_cs(spi, false); + } if (spi->rt && !spi->controller->rt) { spi->controller->rt = true; |