[PATCH 6.19 139/844] spi-geni-qcom: initialize mode related registers to 0

[Sasha Levin]

From: Jonathan Marek <jonathan@xxxxxxxx>

[ Upstream commit 739062a9f1e9a77a9687c8fd30f8e5dd12ec70be ]

setup_fifo_params assumes these will be zero, it won't write these
registers if the initial mode is zero.

Signed-off-by: Jonathan Marek <jonathan@xxxxxxxx>
Link: https://patch.msgid.link/20251120211204.24078-4-jonathan@xxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/spi/spi-geni-qcom.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/spi/spi-geni-qcom.c b/drivers/spi/spi-geni-qcom.c
index a0d8d3425c6c6..9e9953469b3a0 100644
--- a/drivers/spi/spi-geni-qcom.c
+++ b/drivers/spi/spi-geni-qcom.c
@@ -724,6 +724,12 @@ static int spi_geni_init(struct spi_geni_master *mas)
 	case 0:
 		mas->cur_xfer_mode = GENI_SE_FIFO;
 		geni_se_select_mode(se, GENI_SE_FIFO);
+		/* setup_fifo_params assumes that these registers start with a zero value */
+		writel(0, se->base + SE_SPI_LOOPBACK);
+		writel(0, se->base + SE_SPI_DEMUX_SEL);
+		writel(0, se->base + SE_SPI_CPHA);
+		writel(0, se->base + SE_SPI_CPOL);
+		writel(0, se->base + SE_SPI_DEMUX_OUTPUT_INV);
 		ret = 0;
 		break;
 	}
-- 
2.51.0