diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-omap.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-omap.c | 47 |
1 files changed, 27 insertions, 20 deletions
diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c index 0037e31076ba..389ac6032a7b 100644 --- a/drivers/i2c/busses/i2c-omap.c +++ b/drivers/i2c/busses/i2c-omap.c @@ -37,6 +37,7 @@ #include <linux/platform_device.h> #include <linux/clk.h> #include <linux/io.h> +#include <linux/slab.h> /* I2C controller revisions */ #define OMAP_I2C_REV_2 0x20 @@ -49,24 +50,24 @@ #define OMAP_I2C_TIMEOUT (msecs_to_jiffies(1000)) #define OMAP_I2C_REV_REG 0x00 -#define OMAP_I2C_IE_REG 0x04 -#define OMAP_I2C_STAT_REG 0x08 -#define OMAP_I2C_IV_REG 0x0c +#define OMAP_I2C_IE_REG 0x01 +#define OMAP_I2C_STAT_REG 0x02 +#define OMAP_I2C_IV_REG 0x03 /* For OMAP3 I2C_IV has changed to I2C_WE (wakeup enable) */ -#define OMAP_I2C_WE_REG 0x0c -#define OMAP_I2C_SYSS_REG 0x10 -#define OMAP_I2C_BUF_REG 0x14 -#define OMAP_I2C_CNT_REG 0x18 -#define OMAP_I2C_DATA_REG 0x1c -#define OMAP_I2C_SYSC_REG 0x20 -#define OMAP_I2C_CON_REG 0x24 -#define OMAP_I2C_OA_REG 0x28 -#define OMAP_I2C_SA_REG 0x2c -#define OMAP_I2C_PSC_REG 0x30 -#define OMAP_I2C_SCLL_REG 0x34 -#define OMAP_I2C_SCLH_REG 0x38 -#define OMAP_I2C_SYSTEST_REG 0x3c -#define OMAP_I2C_BUFSTAT_REG 0x40 +#define OMAP_I2C_WE_REG 0x03 +#define OMAP_I2C_SYSS_REG 0x04 +#define OMAP_I2C_BUF_REG 0x05 +#define OMAP_I2C_CNT_REG 0x06 +#define OMAP_I2C_DATA_REG 0x07 +#define OMAP_I2C_SYSC_REG 0x08 +#define OMAP_I2C_CON_REG 0x09 +#define OMAP_I2C_OA_REG 0x0a +#define OMAP_I2C_SA_REG 0x0b +#define OMAP_I2C_PSC_REG 0x0c +#define OMAP_I2C_SCLL_REG 0x0d +#define OMAP_I2C_SCLH_REG 0x0e +#define OMAP_I2C_SYSTEST_REG 0x0f +#define OMAP_I2C_BUFSTAT_REG 0x10 /* I2C Interrupt Enable Register (OMAP_I2C_IE): */ #define OMAP_I2C_IE_XDR (1 << 14) /* TX Buffer drain int enable */ @@ -161,6 +162,7 @@ struct omap_i2c_dev { struct device *dev; void __iomem *base; /* virtual */ int irq; + int reg_shift; /* bit shift for I2C register addresses */ struct clk *iclk; /* Interface clock */ struct clk *fclk; /* Functional clock */ struct completion cmd_complete; @@ -189,12 +191,12 @@ struct omap_i2c_dev { static inline void omap_i2c_write_reg(struct omap_i2c_dev *i2c_dev, int reg, u16 val) { - __raw_writew(val, i2c_dev->base + reg); + __raw_writew(val, i2c_dev->base + (reg << i2c_dev->reg_shift)); } static inline u16 omap_i2c_read_reg(struct omap_i2c_dev *i2c_dev, int reg) { - return __raw_readw(i2c_dev->base + reg); + return __raw_readw(i2c_dev->base + (reg << i2c_dev->reg_shift)); } static int __init omap_i2c_get_clocks(struct omap_i2c_dev *dev) @@ -849,7 +851,7 @@ static const struct i2c_algorithm omap_i2c_algo = { .functionality = omap_i2c_func, }; -static int __init +static int __devinit omap_i2c_probe(struct platform_device *pdev) { struct omap_i2c_dev *dev; @@ -901,6 +903,11 @@ omap_i2c_probe(struct platform_device *pdev) platform_set_drvdata(pdev, dev); + if (cpu_is_omap7xx()) + dev->reg_shift = 1; + else + dev->reg_shift = 2; + if ((r = omap_i2c_get_clocks(dev)) != 0) goto err_iounmap; |