diff options
| author | Jitao Shi <jitao.shi@mediatek.com> | 2020-04-11 15:44:07 +0800 |
|---|---|---|
| committer | Chun-Kuang Hu <chunkuang.hu@kernel.org> | 2020-04-22 07:10:36 +0800 |
| commit | 3d50b59abf64dcaee8595a7c12185a5a75a0782a (patch) | |
| tree | a53a3c248857d2d8965b527f3700229cde5d17d4 /drivers/gpu/drm/mediatek/mtk_mipi_tx.c | |
| parent | 6d3a4aeff2fb4f41ab32cc0d445eebdaa01059df (diff) | |
drm/mediatek: add the mipitx driving control
Add a property in device tree to control the driving by different
board.
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Diffstat (limited to 'drivers/gpu/drm/mediatek/mtk_mipi_tx.c')
| -rw-r--r-- | drivers/gpu/drm/mediatek/mtk_mipi_tx.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mediatek/mtk_mipi_tx.c b/drivers/gpu/drm/mediatek/mtk_mipi_tx.c index e4d34484ecc8..e301af64809e 100644 --- a/drivers/gpu/drm/mediatek/mtk_mipi_tx.c +++ b/drivers/gpu/drm/mediatek/mtk_mipi_tx.c @@ -125,6 +125,20 @@ static int mtk_mipi_tx_probe(struct platform_device *pdev) return ret; } + ret = of_property_read_u32(dev->of_node, "drive-strength-microamp", + &mipi_tx->mipitx_drive); + /* If can't get the "mipi_tx->mipitx_drive", set it default 0x8 */ + if (ret < 0) + mipi_tx->mipitx_drive = 4600; + + /* check the mipitx_drive valid */ + if (mipi_tx->mipitx_drive > 6000 || mipi_tx->mipitx_drive < 3000) { + dev_warn(dev, "drive-strength-microamp is invalid %d, not in 3000 ~ 6000\n", + mipi_tx->mipitx_drive); + mipi_tx->mipitx_drive = clamp_val(mipi_tx->mipitx_drive, 3000, + 6000); + } + ref_clk_name = __clk_get_name(ref_clk); ret = of_property_read_string(dev->of_node, "clock-output-names", |