diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2023-01-10 12:38:20 +0300 |
|---|---|---|
| committer | Javier Martinez Canillas <javierm@redhat.com> | 2023-01-10 13:04:56 +0300 |
| commit | 6d6defd42185d8ab07e6d0cada5fb3a986f23406 (patch) | |
| tree | 4736d08318b5e54f14095c57bcaebf05feb94803 /drivers/gpu/drm/mxsfb | |
| parent | 67d0a30128c9f644595dfe67ac0fb941a716a6c9 (diff) | |
| download | linux-6d6defd42185d8ab07e6d0cada5fb3a986f23406.tar.xz | |
drm/mxsfb: improve clk handling for axi clk
Ignoring errors from devm_clk_get() is wrong. To handle not all platforms
having an axi clk use devm_clk_get_optional() instead and do proper error
handling.
Also the clk API handles NULL as a dummy clk (which is also returned by
devm_clk_get_optional() if there is no clk) so there is no need to check
for NULL before calling clk_prepare_enable() or its counter part.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200720153254.18071-1-u.kleine-koenig@pengutronix.de
Diffstat (limited to 'drivers/gpu/drm/mxsfb')
| -rw-r--r-- | drivers/gpu/drm/mxsfb/mxsfb_drv.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.c b/drivers/gpu/drm/mxsfb/mxsfb_drv.c index 810edea0a31e..b3ab86ad1b36 100644 --- a/drivers/gpu/drm/mxsfb/mxsfb_drv.c +++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.c @@ -78,14 +78,12 @@ static const struct mxsfb_devdata mxsfb_devdata[] = { void mxsfb_enable_axi_clk(struct mxsfb_drm_private *mxsfb) { - if (mxsfb->clk_axi) - clk_prepare_enable(mxsfb->clk_axi); + clk_prepare_enable(mxsfb->clk_axi); } void mxsfb_disable_axi_clk(struct mxsfb_drm_private *mxsfb) { - if (mxsfb->clk_axi) - clk_disable_unprepare(mxsfb->clk_axi); + clk_disable_unprepare(mxsfb->clk_axi); } static struct drm_framebuffer * @@ -235,9 +233,9 @@ static int mxsfb_load(struct drm_device *drm, if (IS_ERR(mxsfb->clk)) return PTR_ERR(mxsfb->clk); - mxsfb->clk_axi = devm_clk_get(drm->dev, "axi"); + mxsfb->clk_axi = devm_clk_get_optional(drm->dev, "axi"); if (IS_ERR(mxsfb->clk_axi)) - mxsfb->clk_axi = NULL; + return PTR_ERR(mxsfb->clk_axi); mxsfb->clk_disp_axi = devm_clk_get(drm->dev, "disp_axi"); if (IS_ERR(mxsfb->clk_disp_axi)) |