diff options
Diffstat (limited to 'drivers/spi/spi-dw-mid.c')
| -rw-r--r-- | drivers/spi/spi-dw-mid.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c index a67d37c7e3c0..a0197fd4e95c 100644 --- a/drivers/spi/spi-dw-mid.c +++ b/drivers/spi/spi-dw-mid.c @@ -247,9 +247,9 @@ static struct dw_spi_dma_ops mid_dma_ops = { /* Some specific info for SPI0 controller on Intel MID */ -/* HW info for MRST CLk Control Unit, one 32b reg */ +/* HW info for MRST Clk Control Unit, 32b reg per controller */ #define MRST_SPI_CLK_BASE 100000000 /* 100m */ -#define MRST_CLK_SPI0_REG 0xff11d86c +#define MRST_CLK_SPI_REG 0xff11d86c #define CLK_SPI_BDIV_OFFSET 0 #define CLK_SPI_BDIV_MASK 0x00000007 #define CLK_SPI_CDIV_OFFSET 9 @@ -261,16 +261,17 @@ int dw_spi_mid_init(struct dw_spi *dws) void __iomem *clk_reg; u32 clk_cdiv; - clk_reg = ioremap_nocache(MRST_CLK_SPI0_REG, 16); + clk_reg = ioremap_nocache(MRST_CLK_SPI_REG, 16); if (!clk_reg) return -ENOMEM; - /* get SPI controller operating freq info */ - clk_cdiv = (readl(clk_reg) & CLK_SPI_CDIV_MASK) >> CLK_SPI_CDIV_OFFSET; + /* Get SPI controller operating freq info */ + clk_cdiv = readl(clk_reg + dws->bus_num * sizeof(u32)); + clk_cdiv &= CLK_SPI_CDIV_MASK; + clk_cdiv >>= CLK_SPI_CDIV_OFFSET; dws->max_freq = MRST_SPI_CLK_BASE / (clk_cdiv + 1); - iounmap(clk_reg); - dws->num_cs = 16; + iounmap(clk_reg); #ifdef CONFIG_SPI_DW_MID_DMA dws->dma_priv = kzalloc(sizeof(struct mid_dma), GFP_KERNEL); |