Unverified Commit 4cea6b8c authored by leilk.liu's avatar leilk.liu Committed by Mark Brown
Browse files

spi: add power control when set_cs_timing 



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

Signed-off-by: default avatarleilk.liu <leilk.liu@mediatek.com>
Link: https://lore.kernel.org/r/20210207030953.9297-2-leilk.liu@mediatek.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent c64e7efe

drivers/spi/spi.c

+22 −3
Original line number Diff line number Diff line
@@ -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) ||