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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>
This commit is contained in:
Luhua Xu 2019-10-30 17:03:54 +08:00 committed by Mark Brown
parent c618a90dca
commit d948e6ca18
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GPG Key ID: 24D68B725D5487D0
1 changed files with 14 additions and 1 deletions
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15
drivers/spi/spi.c
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@ -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;