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drm/omap: display: use devm_of_find_backlight

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Look up backlight device using devm_of_find_backlight().
This simplifies the code and prevents us from hardcoding
the node name in the driver.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Zheng Bin <zhengbin13@huawei.com>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Enrico Weigelt <info@metux.net>
Cc: Allison Randal <allison@lohutok.net>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200514191001.457441-2-sam@ravnborg.org
This commit is contained in:
Sam Ravnborg 2020-05-14 21:09:44 +02:00
parent b718102dbd
commit 1efa9eff7b
1 changed files with 8 additions and 10 deletions
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18
drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
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@ -1163,7 +1163,7 @@ static const struct omap_dss_driver dsicm_dss_driver = {
static int dsicm_probe_of(struct platform_device *pdev) static int dsicm_probe_of(struct platform_device *pdev)
{ {
struct device_node *node = pdev->dev.of_node; struct device_node *node = pdev->dev.of_node;
struct device_node *backlight; struct backlight_device *backlight;
struct panel_drv_data *ddata = platform_get_drvdata(pdev); struct panel_drv_data *ddata = platform_get_drvdata(pdev);
struct display_timing timing; struct display_timing timing;
int err; int err;
@ -1216,17 +1216,15 @@ static int dsicm_probe_of(struct platform_device *pdev)
ddata->vddi = NULL; ddata->vddi = NULL;
} }
backlight = of_parse_phandle(node, "backlight", 0); backlight = devm_of_find_backlight(&pdev->dev);
if (backlight) { if (IS_ERR(backlight))
ddata->extbldev = of_find_backlight_by_node(backlight); return PTR_ERR(backlight);
of_node_put(backlight);
if (!ddata->extbldev) /* If no backlight device is found assume native backlight support */
return -EPROBE_DEFER; if (backlight)
} else { ddata->extbldev = backlight;
/* assume native backlight support */ else
ddata->use_dsi_backlight = true; ddata->use_dsi_backlight = true;
}
/* TODO: ulps */ /* TODO: ulps */