[PATCHv3 1/2] drm/omap: use regmap_update_bit() when muxing DSI pads

[Laurent Pinchart]

Hi Tomi,

Thank you for the patch.

On Thursday 10 Aug 2017 15:29:44 Tomi Valkeinen wrote:
> Use regmap_update_bits instead of regmap_read/write, which simplifies
> the code.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen at ti.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>

> ---
>  drivers/gpu/drm/omapdrm/dss/dsi.c | 15 +++------------
>  1 file changed, 3 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c
> b/drivers/gpu/drm/omapdrm/dss/dsi.c index a66d2b1a6c74..1855d69b211d 100644
> --- a/drivers/gpu/drm/omapdrm/dss/dsi.c
> +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c
> @@ -2107,7 +2107,6 @@ static int dsi_omap4_mux_pads(struct dsi_data *dsi,
> unsigned int lanes) {
>  	u32 enable_mask, enable_shift;
>  	u32 pipd_mask, pipd_shift;
> -	u32 reg;
> 
>  	if (!dsi->syscon)
>  		return 0;
> @@ -2126,17 +2125,9 @@ static int dsi_omap4_mux_pads(struct dsi_data *dsi,
> unsigned int lanes) return -ENODEV;
>  	}
> 
> -	regmap_read(dsi->syscon, OMAP4_DSIPHY_SYSCON_OFFSET, &reg);
> -
> -	reg &= ~enable_mask;
> -	reg &= ~pipd_mask;
> -
> -	reg |= (lanes << enable_shift) & enable_mask;
> -	reg |= (lanes << pipd_shift) & pipd_mask;
> -
> -	regmap_write(dsi->syscon, OMAP4_DSIPHY_SYSCON_OFFSET, reg);
> -
> -	return 0;
> +	return regmap_update_bits(dsi->syscon, OMAP4_DSIPHY_SYSCON_OFFSET,
> +		enable_mask | pipd_mask,
> +		(lanes << enable_shift) | (lanes << pipd_shift));
>  }
> 
>  static int dsi_enable_pads(struct dsi_data *dsi, unsigned int lane_mask)

-- 
Regards,

Laurent Pinchart