diff options
| author | Marc Kleine-Budde <mkl@pengutronix.de> | 2020-07-06 17:34:39 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-07-07 12:41:37 +0300 |
| commit | 5197da036398863c90db90b2ea53760fdaec5d86 (patch) | |
| tree | d84bff2489d2f815c4f71fd0cbee0588dcb8d131 /drivers/spi/spi-sun6i.c | |
| parent | 9a3ef9df22ec1fe8d49b219c181c039f25c3296d (diff) | |
| download | linux-5197da036398863c90db90b2ea53760fdaec5d86.tar.xz | |
spi: spi-sun6i: sun6i_spi_drain_fifo(): introduce sun6i_spi_get_rx_fifo_count() and make use of it
This patch introduces the function sun6i_spi_get_rx_fifo_count(), similar to
the existing sun6i_spi_get_tx_fifo_count(), to make the sun6i_spi_drain_fifo()
function a bit easier to read.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Acked-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20200706143443.9855-7-mkl@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-sun6i.c')
| -rw-r--r-- | drivers/spi/spi-sun6i.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/spi/spi-sun6i.c b/drivers/spi/spi-sun6i.c index 40365761f25d..44cd07331627 100644 --- a/drivers/spi/spi-sun6i.c +++ b/drivers/spi/spi-sun6i.c @@ -59,8 +59,7 @@ #define SUN6I_FIFO_CTL_TF_RST BIT(31) #define SUN6I_FIFO_STA_REG 0x1c -#define SUN6I_FIFO_STA_RF_CNT_MASK 0x7f -#define SUN6I_FIFO_STA_RF_CNT_BITS 0 +#define SUN6I_FIFO_STA_RF_CNT_MASK GENMASK(7, 0) #define SUN6I_FIFO_STA_TF_CNT_MASK GENMASK(23, 16) #define SUN6I_CLK_CTL_REG 0x24 @@ -106,6 +105,13 @@ static inline void sun6i_spi_write(struct sun6i_spi *sspi, u32 reg, u32 value) writel(value, sspi->base_addr + reg); } +static inline u32 sun6i_spi_get_rx_fifo_count(struct sun6i_spi *sspi) +{ + u32 reg = sun6i_spi_read(sspi, SUN6I_FIFO_STA_REG); + + return FIELD_GET(SUN6I_FIFO_STA_RF_CNT_MASK, reg); +} + static inline u32 sun6i_spi_get_tx_fifo_count(struct sun6i_spi *sspi) { u32 reg = sun6i_spi_read(sspi, SUN6I_FIFO_STA_REG); @@ -131,13 +137,11 @@ static inline void sun6i_spi_disable_interrupt(struct sun6i_spi *sspi, u32 mask) static inline void sun6i_spi_drain_fifo(struct sun6i_spi *sspi, int len) { - u32 reg, cnt; + u32 cnt; u8 byte; /* See how much data is available */ - reg = sun6i_spi_read(sspi, SUN6I_FIFO_STA_REG); - reg &= SUN6I_FIFO_STA_RF_CNT_MASK; - cnt = reg >> SUN6I_FIFO_STA_RF_CNT_BITS; + cnt = sun6i_spi_get_rx_fifo_count(sspi); if (len > cnt) len = cnt; |