spi: dw: fix wrong RX_SAMPLE_DLY setting after resume

On platforms which need a non-zero rx sample delay, the RX_SAMPLE_DLY reg setting is lost after resume. The reason is that the reg may be reset to 0 after resuming, but dws->cur_rx_sample_dly doesn't know this fact. Fix this issue by clearing dws->cur_rx_sample_dly in dw_spi_shutdown_chip().

---
 drivers/spi/spi-dw.h | 1 +
 1 file changed, 1 insertion(+)

index 2f2debc64e73..a9d055f9c5dd 100644
@@ -283,6 +283,7 @@ static inline void dw_spi_shutdown_chip(struct dw_spi *dws)
 	dw_spi_enable_chip(dws, 0);
 	dw_spi_set_clk(dws, 0);
 	dws->current_freq = 0;
+	dws->cur_rx_sample_dly = 0;
 }
 
 extern void dw_spi_set_cs(struct spi_device *spi, bool enable);

2.53.0

Applied to

https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-7.2

Thanks!

[1/1] spi: dw: fix wrong RX_SAMPLE_DLY setting after resume

      https://git.kernel.org/broonie/spi/c/133c71b2c0bc

All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.

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Thanks,
Mark