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

Tomi Valkeinen
2017-08-10T12:29:44Z

﻿Use regmap_update_bits instead of regmap_read/write, which simplifies
the code.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.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)
--
2.7.4