diff options
| author |   Maxime Ripard <maxime.ripard@free-electrons.com> | 2013-06-12 18:53:30 +0200 |
|---|---|---|
| committer |   Wolfram Sang <wsa@the-dreams.de> | 2013-06-15 13:37:39 +0200 |
| commit | 683e69b8bb4744a4088c80d05762c4258afe47e1 (patch) | |
| tree | ec565b1759248f44a816c75bda7c6baa1613f35d /drivers/i2c | |
| parent | i2c: vt8500: Add support for I2C bus on Wondermedia SoCs (diff) | |
| download | linux-dev-683e69b8bb4744a4088c80d05762c4258afe47e1.tar.xz linux-dev-683e69b8bb4744a4088c80d05762c4258afe47e1.zip | |
i2c: mv64xxx: Add macros to access parts of registers
These macros make it more comprehensive to access to useful masked and
shifted area of the various registers used.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-mv64xxx.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/i2c/busses/i2c-mv64xxx.c b/drivers/i2c/busses/i2c-mv64xxx.c index 6356439454ee..d70a2fda4a91 100644 --- a/drivers/i2c/busses/i2c-mv64xxx.c +++ b/drivers/i2c/busses/i2c-mv64xxx.c @@ -33,6 +33,10 @@ #define MV64XXX_I2C_REG_EXT_SLAVE_ADDR 0x10 #define MV64XXX_I2C_REG_SOFT_RESET 0x1c +#define MV64XXX_I2C_ADDR_ADDR(val) ((val & 0x7f) << 1) +#define MV64XXX_I2C_BAUD_DIV_N(val) (val & 0x7) +#define MV64XXX_I2C_BAUD_DIV_M(val) ((val & 0xf) << 3) + #define MV64XXX_I2C_REG_CONTROL_ACK 0x00000004 #define MV64XXX_I2C_REG_CONTROL_IFLG 0x00000008 #define MV64XXX_I2C_REG_CONTROL_STOP 0x00000010 @@ -133,7 +137,7 @@ mv64xxx_i2c_prepare_for_io(struct mv64xxx_i2c_data *drv_data, drv_data->addr1 = 0xf0 | (((u32)msg->addr & 0x300) >> 7) | dir; drv_data->addr2 = (u32)msg->addr & 0xff; } else { - drv_data->addr1 = ((u32)msg->addr & 0x7f) << 1 | dir; + drv_data->addr1 = MV64XXX_I2C_ADDR_ADDR((u32)msg->addr) | dir; drv_data->addr2 = 0; } } @@ -151,7 +155,7 @@ static void mv64xxx_i2c_hw_init(struct mv64xxx_i2c_data *drv_data) { writel(0, drv_data->reg_base + MV64XXX_I2C_REG_SOFT_RESET); - writel((((drv_data->freq_m & 0xf) << 3) | (drv_data->freq_n & 0x7)), + writel(MV64XXX_I2C_BAUD_DIV_M(drv_data->freq_m) | MV64XXX_I2C_BAUD_DIV_N(drv_data->freq_n), drv_data->reg_base + MV64XXX_I2C_REG_BAUD); writel(0, drv_data->reg_base + MV64XXX_I2C_REG_SLAVE_ADDR); writel(0, drv_data->reg_base + MV64XXX_I2C_REG_EXT_SLAVE_ADDR); |