Messages in this thread Patch in this message | | | From | Allen-KH Cheng <> | Subject | [PATCH] spi: spi-mtk-nor: initialize spi controller after resume | Date | Tue, 12 Apr 2022 19:57:43 +0800 |
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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> --- drivers/spi/spi-mtk-nor.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/spi-mtk-nor.c b/drivers/spi/spi-mtk-nor.c index 94fb09696677..d167699a1a96 100644 --- a/drivers/spi/spi-mtk-nor.c +++ b/drivers/spi/spi-mtk-nor.c @@ -960,7 +960,17 @@ 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 = { -- 2.18.0
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