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36 lines
1.2 KiB
Diff
36 lines
1.2 KiB
Diff
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From a7b630f02bb12f71f23866aee6f9a1a07497d475 Mon Sep 17 00:00:00 2001
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From: Weijie Gao <weijie.gao@mediatek.com>
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Date: Wed, 19 Jul 2023 17:16:02 +0800
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Subject: [PATCH 04/29] 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.
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However these IRQ enable bits may be set in previous boot stage (BootROM).
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If we leave these bits not cleared, although u-boot has disabled IRQ and
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nothing will happen, the linux kernel may encounter panic during
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initializing the spim driver due to IRQ event happens before IRQ handler
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is properly setup.
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This patch clear IRQ bits to prevent this from happening.
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Signed-off-by: SkyLake.Huang <skylake.huang@mediatek.com>
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Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
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Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
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---
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drivers/spi/mtk_spim.c | 3 +++
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1 file changed, 3 insertions(+)
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--- a/drivers/spi/mtk_spim.c
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+++ b/drivers/spi/mtk_spim.c
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@@ -242,6 +242,9 @@ static int mtk_spim_hw_init(struct spi_s
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reg_val &= ~SPI_CMD_SAMPLE_SEL;
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}
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+ /* Disable interrupt enable for pause mode & normal mode */
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+ reg_val &= ~(SPI_CMD_PAUSE_IE | SPI_CMD_FINISH_IE);
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+
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/* disable dma mode */
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reg_val &= ~(SPI_CMD_TX_DMA | SPI_CMD_RX_DMA);
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