diff options
Diffstat (limited to 'drivers/staging/sm750fb/ddk750_swi2c.c')
| -rw-r--r-- | drivers/staging/sm750fb/ddk750_swi2c.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/staging/sm750fb/ddk750_swi2c.c b/drivers/staging/sm750fb/ddk750_swi2c.c index ddbbeffcef3a..37cdd5b5f19e 100644 --- a/drivers/staging/sm750fb/ddk750_swi2c.c +++ b/drivers/staging/sm750fb/ddk750_swi2c.c @@ -125,7 +125,10 @@ static void sw_i2c_scl(unsigned char value) gpio_dir = PEEK32(sw_i2c_clk_gpio_data_dir_reg); if (value) { /* High */ - /* Set direction as input. This will automatically pull the signal up. */ + /* + * Set direction as input. This will automatically + * pull the signal up. + */ gpio_dir &= ~(1 << sw_i2c_clk_gpio); POKE32(sw_i2c_clk_gpio_data_dir_reg, gpio_dir); } else { /* Low */ @@ -159,7 +162,10 @@ static void sw_i2c_sda(unsigned char value) gpio_dir = PEEK32(sw_i2c_data_gpio_data_dir_reg); if (value) { /* High */ - /* Set direction as input. This will automatically pull the signal up. */ + /* + * Set direction as input. This will automatically + * pull the signal up. + */ gpio_dir &= ~(1 << sw_i2c_data_gpio); POKE32(sw_i2c_data_gpio_data_dir_reg, gpio_dir); } else { /* Low */ @@ -184,10 +190,11 @@ static unsigned char sw_i2c_read_sda(void) { unsigned long gpio_dir; unsigned long gpio_data; + unsigned long dir_mask = 1 << sw_i2c_data_gpio; /* Make sure that the direction is input (High) */ gpio_dir = PEEK32(sw_i2c_data_gpio_data_dir_reg); - if ((gpio_dir & (1 << sw_i2c_data_gpio)) != (~(1 << sw_i2c_data_gpio))) { + if ((gpio_dir & dir_mask) != ~dir_mask) { gpio_dir &= ~(1 << sw_i2c_data_gpio); POKE32(sw_i2c_data_gpio_data_dir_reg, gpio_dir); } @@ -392,7 +399,10 @@ long sm750_sw_i2c_init( { int i; - /* Return 0 if the GPIO pins to be used is out of range. The range is only from [0..63] */ + /* + * Return 0 if the GPIO pins to be used is out of range. The + * range is only from [0..63] + */ if ((clk_gpio > 31) || (data_gpio > 31)) return -1; @@ -417,9 +427,9 @@ long sm750_sw_i2c_init( /* Enable the GPIO pins for the i2c Clock and Data (GPIO MUX) */ POKE32(sw_i2c_clk_gpio_mux_reg, - PEEK32(sw_i2c_clk_gpio_mux_reg) & ~(1 << sw_i2c_clk_gpio)); + PEEK32(sw_i2c_clk_gpio_mux_reg) & ~(1 << sw_i2c_clk_gpio)); POKE32(sw_i2c_data_gpio_mux_reg, - PEEK32(sw_i2c_data_gpio_mux_reg) & ~(1 << sw_i2c_data_gpio)); + PEEK32(sw_i2c_data_gpio_mux_reg) & ~(1 << sw_i2c_data_gpio)); /* Enable GPIO power */ enableGPIO(1); |