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spi: spi-mtk-nor: initialize spi controller after resume

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[ Upstream commit 317c2045618cc1f8d38beb8c93a7bdb6ad8638c6 ]

After system resumes, the registers of nor controller are
initialized with default values. The nor controller will
not function properly.

To handle both issues above, we add mtk_nor_init() in
mtk_nor_resume after pm_runtime_force_resume().

Fixes: 3bfd9103c7af ("spi: spi-mtk-nor: Add power management support")

Signed-off-by: Allen-KH Cheng <allen-kh.cheng@mediatek.com>
Reviewed-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Link: https://lore.kernel.org/r/20220412115743.22641-1-allen-kh.cheng@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Allen-KH Cheng 2022-04-12 19:57:43 +08:00 committed by Greg Kroah-Hartman
parent f714abf28f
commit 3f7914dbea
1 changed files with 11 additions and 1 deletions
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12
drivers/spi/spi-mtk-nor.c
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@ -895,7 +895,17 @@ static int __maybe_unused mtk_nor_suspend(struct device *dev)
static int __maybe_unused mtk_nor_resume(struct device *dev)
{
return pm_runtime_force_resume(dev);
struct spi_controller *ctlr = dev_get_drvdata(dev);
struct mtk_nor *sp = spi_controller_get_devdata(ctlr);
int ret;
ret = pm_runtime_force_resume(dev);
if (ret)
return ret;
mtk_nor_init(sp);
return 0;
}
static const struct dev_pm_ops mtk_nor_pm_ops = {