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spi: synquacer: wait until slave is deselected

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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>
This commit is contained in:
Masahisa Kojima 2022-05-17 17:41:37 +09:00 committed by Tom Rini
parent 29d382b94e
commit 88d50ed8a1
1 changed files with 7 additions and 0 deletions
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7
drivers/spi/spi-synquacer.c
View file

@ -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)))
;
}
}