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spi: add power control when set_cs_timing

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As to set_cs_timing takes effect immediately, power spi
is needed when call spi_set_cs_timing.

Signed-off-by: leilk.liu <leilk.liu@mediatek.com>
Link: https://lore.kernel.org/r/20210207030953.9297-2-leilk.liu@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
leilk.liu 2021-02-07 11:09:51 +08:00 committed by Mark Brown
parent c64e7efe46
commit 4cea6b8cc3
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GPG key ID: 24D68B725D5487D0
1 changed files with 22 additions and 3 deletions
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21
drivers/spi/spi.c
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@ -3460,11 +3460,30 @@ EXPORT_SYMBOL_GPL(spi_setup);
int spi_set_cs_timing(struct spi_device *spi, struct spi_delay *setup,
struct spi_delay *hold, struct spi_delay *inactive)
{
struct device *parent = spi->controller->dev.parent;
size_t len;
int status;
if (spi->controller->set_cs_timing)
if (spi->controller->set_cs_timing) {
if (spi->controller->auto_runtime_pm) {
status = pm_runtime_get_sync(parent);
if (status < 0) {
pm_runtime_put_noidle(parent);
dev_err(&spi->controller->dev, "Failed to power device: %d\n",
status);
return status;
}
status = spi->controller->set_cs_timing(spi, setup,
hold, inactive);
pm_runtime_mark_last_busy(parent);
pm_runtime_put_autosuspend(parent);
return status;
} else {
return spi->controller->set_cs_timing(spi, setup, hold,
inactive);
}
}
if ((setup && setup->unit == SPI_DELAY_UNIT_SCK) ||
(hold && hold->unit == SPI_DELAY_UNIT_SCK) ||