diff options
| author | Masahisa Kojima | 2022-05-17 17:41:37 +0900 |
|---|---|---|
| committer | Tom Rini | 2022-06-10 13:37:32 -0400 |
| commit | 88d50ed8a15fc4a0df37e2a274607827a52a2217 (patch) | |
| tree | f71aa0629c8233770e43b0e1cd29293367ad8271 | |
| parent | 29d382b94e6a1b0eddb3b7ae52099c9736c37a20 (diff) | |
spi: synquacer: wait until slave is deselected
synquacer_cs_set() function does not wait the chip select
is deasserted when the driver sets the DMSTOP to deselect
the slave.
This commit checks the Slave Select Released(SRS) bit to wait
until the slave is deselected.
Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Signed-off-by: Satoru Okamoto <okamoto.satoru@socionext.com>
Acked-by: Jassi Brar <jaswinder.singh@linaro.org>
| -rw-r--r-- | drivers/spi/spi-synquacer.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/spi/spi-synquacer.c b/drivers/spi/spi-synquacer.c index 62f85f03353..f1422cf893e 100644 --- a/drivers/spi/spi-synquacer.c +++ b/drivers/spi/spi-synquacer.c @@ -46,7 +46,9 @@ #define RXE 0x24 #define RXC 0x28 #define TFLETE 4 +#define TSSRS 6 #define RFMTE 5 +#define RSSRS 6 #define FAULTF 0x2c #define FAULTC 0x30 @@ -170,6 +172,11 @@ static void synquacer_cs_set(struct synquacer_spi_priv *priv, bool active) priv->rx_words = 16; read_fifo(priv); } + + /* wait until slave is deselected */ + while (!(readl(priv->base + TXF) & BIT(TSSRS)) || + !(readl(priv->base + RXF) & BIT(RSSRS))) + ; } } |