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spi: mtk_spim: clear IRQ enable bits

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In u-boot we don't use IRQ. Instead, we poll busy bit in SPI_STATUS.

However these IRQ enable bits may be set in previous boot stage (BootROM).

If we leave these bits not cleared, although u-boot has disabled IRQ and
nothing will happen, the linux kernel may encounter panic during
initializing the spim driver due to IRQ event happens before IRQ handler
is properly setup.

This patch clear IRQ bits to prevent this from happening.

Signed-off-by: SkyLake.Huang <skylake.huang@mediatek.com>
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
This commit is contained in:
Weijie Gao 2023-07-19 17:16:02 +08:00 committed by Tom Rini
parent 793e623011
commit b43512d046
1 changed files with 3 additions and 0 deletions
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3
drivers/spi/mtk_spim.c
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@ -242,6 +242,9 @@ static int mtk_spim_hw_init(struct spi_slave *slave)
reg_val &= ~SPI_CMD_SAMPLE_SEL;
}
/* Disable interrupt enable for pause mode & normal mode */
reg_val &= ~(SPI_CMD_PAUSE_IE | SPI_CMD_FINISH_IE);
/* disable dma mode */
reg_val &= ~(SPI_CMD_TX_DMA | SPI_CMD_RX_DMA);