From: Andy Shevchenko
> Sent: 08 February 2023 11:30
>
> Since we have a proper endianness converters for LE 24-bit data use
> them. While at it, format the code using switch-cases as it's done
> for the rest of the endianness handlers.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> ---
> drivers/media/i2c/imx290.c | 9 +++++++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c
> index 49d6c8bdec41..330098a0772d 100644
> --- a/drivers/media/i2c/imx290.c
> +++ b/drivers/media/i2c/imx290.c
> @@ -16,6 +16,9 @@
> #include <linux/pm_runtime.h>
> #include <linux/regmap.h>
> #include <linux/regulator/consumer.h>
> +
> +#include <asm/unaligned.h>
> +
> #include <media/media-entity.h>
> #include <media/v4l2-ctrls.h>
> #include <media/v4l2-device.h>
> @@ -466,18 +469,20 @@ static int __always_unused imx290_read(struct imx290 *imx290, u32 addr, u32 *val
> return ret;
> }
>
> - *value = (data[2] << 16) | (data[1] << 8) | data[0];
> + *value = get_unaligned_le24(data);
> return 0;
> }
>
> static int imx290_write(struct imx290 *imx290, u32 addr, u32 value, int *err)
> {
> - u8 data[3] = { value & 0xff, (value >> 8) & 0xff, value >> 16 };
> + u8 data[3];
> int ret;
>
> if (err && *err)
> return *err;
>
> + put_unaligned_le24(value, data);
> +
> ret = regmap_raw_write(imx290->regmap, addr & IMX290_REG_ADDR_MASK,
> data, (addr >> IMX290_REG_SIZE_SHIFT) & 3);
Why not just use an le32, htole32() and take the address of the low byte?
Anything doing put/get on a 24bit value is pretty much required
to do byte accesses anyway.
David
-
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