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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>
This commit is contained in:
Maxime Ripard 2013-06-12 18:53:30 +02:00 committed by Wolfram Sang
parent 560746eb79
commit 683e69b8bb
1 changed files with 6 additions and 2 deletions
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8
drivers/i2c/busses/i2c-mv64xxx.c
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@ -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);