diff options
Diffstat (limited to 'drivers/spi/spi-dw.h')
| -rw-r--r-- | drivers/spi/spi-dw.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h index 6c91391c1a4f..b75ed327d5a2 100644 --- a/drivers/spi/spi-dw.h +++ b/drivers/spi/spi-dw.h @@ -109,6 +109,7 @@ struct dw_spi { u32 fifo_len; /* depth of the FIFO buffer */ u32 max_freq; /* max bus freq supported */ + u32 reg_io_width; /* DR I/O width in bytes */ u16 bus_num; u16 num_cs; /* supported slave numbers */ @@ -145,11 +146,45 @@ static inline u32 dw_readl(struct dw_spi *dws, u32 offset) return __raw_readl(dws->regs + offset); } +static inline u16 dw_readw(struct dw_spi *dws, u32 offset) +{ + return __raw_readw(dws->regs + offset); +} + static inline void dw_writel(struct dw_spi *dws, u32 offset, u32 val) { __raw_writel(val, dws->regs + offset); } +static inline void dw_writew(struct dw_spi *dws, u32 offset, u16 val) +{ + __raw_writew(val, dws->regs + offset); +} + +static inline u32 dw_read_io_reg(struct dw_spi *dws, u32 offset) +{ + switch (dws->reg_io_width) { + case 2: + return dw_readw(dws, offset); + case 4: + default: + return dw_readl(dws, offset); + } +} + +static inline void dw_write_io_reg(struct dw_spi *dws, u32 offset, u32 val) +{ + switch (dws->reg_io_width) { + case 2: + dw_writew(dws, offset, val); + break; + case 4: + default: + dw_writel(dws, offset, val); + break; + } +} + static inline void spi_enable_chip(struct dw_spi *dws, int enable) { dw_writel(dws, DW_SPI_SSIENR, (enable ? 1 : 0)); |