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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>
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1 changed files with 14 additions and 1 deletions
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@ -3261,7 +3261,20 @@ int spi_setup(struct spi_device *spi)
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if (spi->controller->setup)
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status = spi->controller->setup(spi);
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spi_set_cs(spi, false);
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if (spi->controller->auto_runtime_pm && spi->controller->set_cs) {
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status = pm_runtime_get_sync(spi->controller->dev.parent);
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if (status < 0) {
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pm_runtime_put_noidle(spi->controller->dev.parent);
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dev_err(&spi->controller->dev, "Failed to power device: %d\n",
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status);
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return status;
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}
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spi_set_cs(spi, false);
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pm_runtime_mark_last_busy(spi->controller->dev.parent);
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pm_runtime_put_autosuspend(spi->controller->dev.parent);
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} else {
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spi_set_cs(spi, false);
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}
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if (spi->rt && !spi->controller->rt) {
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spi->controller->rt = true;
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