On 1/31/21 7:34 PM, Sean Anderson wrote:
DWC_SPI has more than 8 interrupts. Write to the whole IMR to mask everything.
Signed-off-by: Sean Anderson seanga2@gmail.com
drivers/spi/designware_spi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/spi/designware_spi.c b/drivers/spi/designware_spi.c index 519d6e32bd..29ec1503fd 100644 --- a/drivers/spi/designware_spi.c +++ b/drivers/spi/designware_spi.c @@ -252,7 +252,7 @@ static int dw_spi_of_to_plat(struct udevice *bus) static void spi_hw_init(struct udevice *bus, struct dw_spi_priv *priv) { dw_write(priv, DW_SPI_SSIENR, 0);
- dw_write(priv, DW_SPI_IMR, 0xff);
- dw_write(priv, DW_SPI_IMR, 0xFFFFFFFF);
After further reviewing the datasheet, it turns out that interrupts are masked by 0s in this register (and enabled by 1s). I'm not really sure what this line was originally trying to accomplish. We never enable interrupts globally, and we can just read from RISR if we need to get an interrupt. Perhaps this patch should just remove this line?
--Sean
dw_write(priv, DW_SPI_SSIENR, 1);
/*