On Thu, 10 Sep 2015, Shraddha Barke wrote:
> This patch replaces bit shifting on 1 with the BIT(x) macro
> as it's extensively used by other function in this driver.
>
> This was done with coccinelle:
> @@ int g; @@
>
> -(1 << g)
> +BIT(g)
This doesn't look like a good idea here, since there is a mixture of uses
of BIT and other things for similar values.
julia
> Signed-off-by: Shraddha Barke <shraddha.6...@gmail.com>
> ---
> drivers/staging/iio/impedance-analyzer/ad5933.c | 22 +++++++++++-----------
> 1 file changed, 11 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/staging/iio/impedance-analyzer/ad5933.c
> b/drivers/staging/iio/impedance-analyzer/ad5933.c
> index c18109c..48acad0 100644
> --- a/drivers/staging/iio/impedance-analyzer/ad5933.c
> +++ b/drivers/staging/iio/impedance-analyzer/ad5933.c
> @@ -39,7 +39,7 @@
> #define AD5933_REG_IMAG_DATA 0x96 /* R, 2 bytes*/
>
> /* AD5933_REG_CONTROL_HB Bits */
> -#define AD5933_CTRL_INIT_START_FREQ (0x1 << 4)
> +#define AD5933_CTRL_INIT_START_FREQ BIT(4)
> #define AD5933_CTRL_START_SWEEP (0x2 << 4)
> #define AD5933_CTRL_INC_FREQ (0x3 << 4)
> #define AD5933_CTRL_REPEAT_FREQ (0x4 << 4)
> @@ -48,23 +48,23 @@
> #define AD5933_CTRL_STANDBY (0xB << 4)
>
> #define AD5933_CTRL_RANGE_2000mVpp (0x0 << 1)
> -#define AD5933_CTRL_RANGE_200mVpp (0x1 << 1)
> +#define AD5933_CTRL_RANGE_200mVpp BIT(1)
> #define AD5933_CTRL_RANGE_400mVpp (0x2 << 1)
> #define AD5933_CTRL_RANGE_1000mVpp (0x3 << 1)
> #define AD5933_CTRL_RANGE(x) ((x) << 1)
>
> -#define AD5933_CTRL_PGA_GAIN_1 (0x1 << 0)
> +#define AD5933_CTRL_PGA_GAIN_1 BIT(0)
> #define AD5933_CTRL_PGA_GAIN_5 (0x0 << 0)
>
> /* AD5933_REG_CONTROL_LB Bits */
> -#define AD5933_CTRL_RESET (0x1 << 4)
> +#define AD5933_CTRL_RESET BIT(4)
> #define AD5933_CTRL_INT_SYSCLK (0x0 << 3)
> -#define AD5933_CTRL_EXT_SYSCLK (0x1 << 3)
> +#define AD5933_CTRL_EXT_SYSCLK BIT(3)
>
> /* AD5933_REG_STATUS Bits */
> -#define AD5933_STAT_TEMP_VALID (0x1 << 0)
> -#define AD5933_STAT_DATA_VALID (0x1 << 1)
> -#define AD5933_STAT_SWEEP_DONE (0x1 << 2)
> +#define AD5933_STAT_TEMP_VALID BIT(0)
> +#define AD5933_STAT_DATA_VALID BIT(1)
> +#define AD5933_STAT_SWEEP_DONE BIT(2)
>
> /* I2C Block Commands */
> #define AD5933_I2C_BLOCK_WRITE 0xA0
> @@ -222,7 +222,7 @@ static int ad5933_set_freq(struct ad5933_state *st,
> u8 d8[4];
> } dat;
>
> - freqreg = (u64) freq * (u64) (1 << 27);
> + freqreg = (u64) freq * (u64) BIT(27);
> do_div(freqreg, st->mclk_hz / 4);
>
> switch (reg) {
> @@ -308,7 +308,7 @@ static ssize_t ad5933_show_frequency(struct device *dev,
> freqreg = be32_to_cpu(dat.d32) & 0xFFFFFF;
>
> freqreg = (u64) freqreg * (u64) (st->mclk_hz / 4);
> - do_div(freqreg, 1 << 27);
> + do_div(freqreg, BIT(27));
>
> return sprintf(buf, "%d\n", (int) freqreg);
> }
> @@ -437,7 +437,7 @@ static ssize_t ad5933_store(struct device *dev,
>
> /* 2x, 4x handling, see datasheet */
> if (val > 511)
> - val = (val >> 1) | (1 << 9);
> + val = (val >> 1) | BIT(9);
> else if (val > 1022)
> val = (val >> 2) | (3 << 9);
>
> --
> 2.1.4
>
>
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