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    SubjectRe: [PATCH 2/6] Staging: iio: meter: Prefer using the BIT macro
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    Date
    On 10/09/15 17:30, Shraddha Barke wrote:
    > This patch replaces bit shifting on 1 with the BIT(x) macro
    >
    > This was done with coccinelle:
    > @@ int g; @@
    >
    > -(1 << g)
    > +BIT(g)
    >
    > Signed-off-by: Shraddha Barke <shraddha.6596@gmail.com>
    There are a number of places in these drivers where the use
    of GENMASK and a related shift macro would also improve the code, but
    the changes here seem sensible.

    I'll pick this one up.

    Applied to the togreg branch of iio.git.

    Thanks,

    Jonathan
    > ---
    > drivers/staging/iio/meter/ade7753.c | 8 ++++----
    > drivers/staging/iio/meter/ade7754.c | 6 +++---
    > drivers/staging/iio/meter/ade7758_core.c | 6 +++---
    > drivers/staging/iio/meter/ade7759.c | 8 ++++----
    > drivers/staging/iio/meter/ade7854.c | 6 +++---
    > 5 files changed, 17 insertions(+), 17 deletions(-)
    >
    > diff --git a/drivers/staging/iio/meter/ade7753.c b/drivers/staging/iio/meter/ade7753.c
    > index ffc7f0d..3d2e50c 100644
    > --- a/drivers/staging/iio/meter/ade7753.c
    > +++ b/drivers/staging/iio/meter/ade7753.c
    > @@ -219,7 +219,7 @@ static int ade7753_reset(struct device *dev)
    > u16 val;
    >
    > ade7753_spi_read_reg_16(dev, ADE7753_MODE, &val);
    > - val |= 1 << 6; /* Software Chip Reset */
    > + val |= BIT(6); /* Software Chip Reset */
    >
    > return ade7753_spi_write_reg_16(dev, ADE7753_MODE, val);
    > }
    > @@ -328,10 +328,10 @@ static int ade7753_set_irq(struct device *dev, bool enable)
    > goto error_ret;
    >
    > if (enable)
    > - irqen |= 1 << 3; /* Enables an interrupt when a data is
    > + irqen |= BIT(3); /* Enables an interrupt when a data is
    > present in the waveform register */
    > else
    > - irqen &= ~(1 << 3);
    > + irqen &= ~BIT(3);
    >
    > ret = ade7753_spi_write_reg_8(dev, ADE7753_IRQEN, irqen);
    >
    > @@ -345,7 +345,7 @@ static int ade7753_stop_device(struct device *dev)
    > u16 val;
    >
    > ade7753_spi_read_reg_16(dev, ADE7753_MODE, &val);
    > - val |= 1 << 4; /* AD converters can be turned off */
    > + val |= BIT(4); /* AD converters can be turned off */
    >
    > return ade7753_spi_write_reg_16(dev, ADE7753_MODE, val);
    > }
    > diff --git a/drivers/staging/iio/meter/ade7754.c b/drivers/staging/iio/meter/ade7754.c
    > index f12b2e5..8552c76 100644
    > --- a/drivers/staging/iio/meter/ade7754.c
    > +++ b/drivers/staging/iio/meter/ade7754.c
    > @@ -223,7 +223,7 @@ static int ade7754_reset(struct device *dev)
    > if (ret < 0)
    > return ret;
    >
    > - val |= 1 << 6; /* Software Chip Reset */
    > + val |= BIT(6); /* Software Chip Reset */
    > return ade7754_spi_write_reg_8(dev, ADE7754_OPMODE, val);
    > }
    >
    > @@ -350,10 +350,10 @@ static int ade7754_set_irq(struct device *dev, bool enable)
    > goto error_ret;
    >
    > if (enable)
    > - irqen |= 1 << 14; /* Enables an interrupt when a data is
    > + irqen |= BIT(14); /* Enables an interrupt when a data is
    > present in the waveform register */
    > else
    > - irqen &= ~(1 << 14);
    > + irqen &= ~BIT(14);
    >
    > ret = ade7754_spi_write_reg_16(dev, ADE7754_IRQEN, irqen);
    > if (ret)
    > diff --git a/drivers/staging/iio/meter/ade7758_core.c b/drivers/staging/iio/meter/ade7758_core.c
    > index 77141ae..3883808 100644
    > --- a/drivers/staging/iio/meter/ade7758_core.c
    > +++ b/drivers/staging/iio/meter/ade7758_core.c
    > @@ -308,7 +308,7 @@ static int ade7758_reset(struct device *dev)
    > dev_err(dev, "Failed to read opmode reg\n");
    > return ret;
    > }
    > - val |= 1 << 6; /* Software Chip Reset */
    > + val |= BIT(6); /* Software Chip Reset */
    > ret = ade7758_spi_write_reg_8(dev, ADE7758_OPMODE, val);
    > if (ret < 0)
    > dev_err(dev, "Failed to write opmode reg\n");
    > @@ -426,10 +426,10 @@ int ade7758_set_irq(struct device *dev, bool enable)
    > goto error_ret;
    >
    > if (enable)
    > - irqen |= 1 << 16; /* Enables an interrupt when a data is
    > + irqen |= BIT(16); /* Enables an interrupt when a data is
    > present in the waveform register */
    > else
    > - irqen &= ~(1 << 16);
    > + irqen &= ~BIT(16);
    >
    > ret = ade7758_spi_write_reg_24(dev, ADE7758_MASK, irqen);
    > if (ret)
    > diff --git a/drivers/staging/iio/meter/ade7759.c b/drivers/staging/iio/meter/ade7759.c
    > index dbceda1..23e7392 100644
    > --- a/drivers/staging/iio/meter/ade7759.c
    > +++ b/drivers/staging/iio/meter/ade7759.c
    > @@ -224,7 +224,7 @@ static int ade7759_reset(struct device *dev)
    > if (ret < 0)
    > return ret;
    >
    > - val |= 1 << 6; /* Software Chip Reset */
    > + val |= BIT(6); /* Software Chip Reset */
    > return ade7759_spi_write_reg_16(dev,
    > ADE7759_MODE,
    > val);
    > @@ -288,10 +288,10 @@ static int ade7759_set_irq(struct device *dev, bool enable)
    > goto error_ret;
    >
    > if (enable)
    > - irqen |= 1 << 3; /* Enables an interrupt when a data is
    > + irqen |= BIT(3); /* Enables an interrupt when a data is
    > present in the waveform register */
    > else
    > - irqen &= ~(1 << 3);
    > + irqen &= ~BIT(3);
    >
    > ret = ade7759_spi_write_reg_8(dev, ADE7759_IRQEN, irqen);
    >
    > @@ -314,7 +314,7 @@ static int ade7759_stop_device(struct device *dev)
    > return ret;
    > }
    >
    > - val |= 1 << 4; /* AD converters can be turned off */
    > + val |= BIT(4); /* AD converters can be turned off */
    >
    > return ade7759_spi_write_reg_16(dev, ADE7759_MODE, val);
    > }
    > diff --git a/drivers/staging/iio/meter/ade7854.c b/drivers/staging/iio/meter/ade7854.c
    > index d620bbd..a838835 100644
    > --- a/drivers/staging/iio/meter/ade7854.c
    > +++ b/drivers/staging/iio/meter/ade7854.c
    > @@ -181,7 +181,7 @@ static int ade7854_reset(struct device *dev)
    > u16 val;
    >
    > st->read_reg_16(dev, ADE7854_CONFIG, &val);
    > - val |= 1 << 7; /* Software Chip Reset */
    > + val |= BIT(7); /* Software Chip Reset */
    >
    > return st->write_reg_16(dev, ADE7854_CONFIG, val);
    > }
    > @@ -420,10 +420,10 @@ static int ade7854_set_irq(struct device *dev, bool enable)
    > goto error_ret;
    >
    > if (enable)
    > - irqen |= 1 << 17; /* 1: interrupt enabled when all periodical
    > + irqen |= BIT(17); /* 1: interrupt enabled when all periodical
    > (at 8 kHz rate) DSP computations finish. */
    > else
    > - irqen &= ~(1 << 17);
    > + irqen &= ~BIT(17);
    >
    > ret = st->write_reg_32(dev, ADE7854_MASK0, irqen);
    > if (ret)
    >



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