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drm/aspeed: Look up syscon by phandle

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This scales better to multiple families of SoC. The lookup by compatible
can be removed in a future change.

The fallback path is for the ast2500 platform only. Other platforms will
be added with the new style, so they won't need fallback paths.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Link: https://patchwork.freedesktop.org/patch/msgid/20210209123734.130483-2-joel@jms.id.au
This commit is contained in:
Joel Stanley 2021-02-09 23:07:33 +10:30
parent f1a75f4dd8
commit 92614ad540
1 changed files with 7 additions and 3 deletions
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10
drivers/gpu/drm/aspeed/aspeed_gfx_drv.c
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@ -103,6 +103,7 @@ static int aspeed_gfx_load(struct drm_device *drm)
{
struct platform_device *pdev = to_platform_device(drm->dev);
struct aspeed_gfx *priv = to_aspeed_gfx(drm);
struct device_node *np = pdev->dev.of_node;
struct resource *res;
int ret;
@ -111,10 +112,13 @@ static int aspeed_gfx_load(struct drm_device *drm)
if (IS_ERR(priv->base))
return PTR_ERR(priv->base);
priv->scu = syscon_regmap_lookup_by_compatible("aspeed,ast2500-scu");
priv->scu = syscon_regmap_lookup_by_phandle(np, "syscon");
if (IS_ERR(priv->scu)) {
dev_err(&pdev->dev, "failed to find SCU regmap\n");
return PTR_ERR(priv->scu);
priv->scu = syscon_regmap_lookup_by_compatible("aspeed,ast2500-scu");
if (IS_ERR(priv->scu)) {
dev_err(&pdev->dev, "failed to find SCU regmap\n");
return PTR_ERR(priv->scu);
}
}
ret = of_reserved_mem_device_init(drm->dev);