diff options
Diffstat (limited to 'drivers/spi/rk_spi.h')
| -rw-r--r-- | drivers/spi/rk_spi.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/spi/rk_spi.h b/drivers/spi/rk_spi.h index f1ac81203f..02aa9d0436 100644 --- a/drivers/spi/rk_spi.h +++ b/drivers/spi/rk_spi.h @@ -119,6 +119,13 @@ enum { }; #define ROCKCHIP_SPI_TIMEOUT_MS 1000 -#define ROCKCHIP_SPI_MAX_RATE 48000000 + +/* + * We limit the maximum bitrate to 50MBit/s (50MHz) due to an assumed + * hardware limitation... the Linux kernel source has the following + * comment: + * "sclk_out: spi master internal logic in rk3x can support 50Mhz" + */ +#define ROCKCHIP_SPI_MAX_RATE 50000000 #endif /* __RK_SPI_H */ |