| Message ID | 20201001222829.15977-15-Sergey.Semin@baikalelectronics.ru |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v3,01/21] spi: dw: Use an explicit set_cs assignment | expand |
diff --git a/drivers/spi/spi-dw-core.c b/drivers/spi/spi-dw-core.c index fca929280aab..a6f86314567f 100644 --- a/drivers/spi/spi-dw-core.c +++ b/drivers/spi/spi-dw-core.c @@ -100,7 +100,7 @@ void dw_spi_set_cs(struct spi_device *spi, bool enable) */ if (cs_high == enable) dw_writel(dws, DW_SPI_SER, BIT(spi->chip_select)); - else if (dws->caps & DW_SPI_CAP_CS_OVERRIDE) + else dw_writel(dws, DW_SPI_SER, 0); } EXPORT_SYMBOL_GPL(dw_spi_set_cs);
By design of the currently available native set_cs callback, the CS de-assertion will be done only if it's required by the corresponding controller capability. But in order to pre-fill the Tx FIFO buffer with data during the SPI memory ops execution the SER register needs to be left cleared before that. We'll also need a way to explicitly set and clear the corresponding CS bit at a certain moment of the operation. Let's alter the set_cs function then to also de-activate the CS, when it's required. Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> --- drivers/spi/spi-dw-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)