soc: imx: gpc: fix imx6sl gpc power domain regression

Commit 721cabf6c660 ("soc: imx: move PGC handling to a new GPC driver")
broke the MX6SL GPC power domain support.
It always got the following error:
[    1.248364] imx-gpc 20dc000.gpc: could not find pgc DT node
This patch adds back the legecy support.

Fixes: 721cabf6c660 ("soc: imx: move PGC handling to a new GPC driver")
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/drivers/soc/imx/gpc.c b/drivers/soc/imx/gpc.c
index ba6e7ab..9a2354e 100644 (file)
--- a/drivers/soc/imx/gpc.c
+++ b/drivers/soc/imx/gpc.c
@@ -309,12 +309,13 @@ static struct genpd_onecell_data imx_gpc_onecell_data = {
        .num_domains = 2,
 };
 
-static int imx_gpc_old_dt_init(struct device *dev, struct regmap *regmap)
+static int imx_gpc_old_dt_init(struct device *dev, struct regmap *regmap,
+                              unsigned int num_domains)
 {
        struct imx_pm_domain *domain;
        int i, ret;
 
-       for (i = 0; i < 2; i++) {
+       for (i = 0; i < num_domains; i++) {
                domain = &imx_gpc_domains[i];
                domain->regmap = regmap;
                domain->ipg_rate_mhz = 66;
@@ -332,7 +333,7 @@ static int imx_gpc_old_dt_init(struct device *dev, struct regmap *regmap)
                }
        }
 
-       for (i = 0; i < 2; i++)
+       for (i = 0; i < num_domains; i++)
                pm_genpd_init(&imx_gpc_domains[i].base, NULL, false);
 
        if (IS_ENABLED(CONFIG_PM_GENERIC_DOMAINS)) {
@@ -345,7 +346,7 @@ static int imx_gpc_old_dt_init(struct device *dev, struct regmap *regmap)
        return 0;
 
 genpd_err:
-       for (i = 0; i < 2; i++)
+       for (i = 0; i < num_domains; i++)
                pm_genpd_remove(&imx_gpc_domains[i].base);
        imx_pgc_put_clocks(&imx_gpc_domains[1]);
 clk_err:
@@ -385,13 +386,8 @@ static int imx_gpc_probe(struct platform_device *pdev)
        }
 
        if (!pgc_node) {
-               /* old DT layout is only supported for mx6q aka 2 domains */
-               if (of_id_data->num_domains != 2) {
-                       dev_err(&pdev->dev, "could not find pgc DT node\n");
-                       return -ENODEV;
-               }
-
-               ret = imx_gpc_old_dt_init(&pdev->dev, regmap);
+               ret = imx_gpc_old_dt_init(&pdev->dev, regmap,
+                                         of_id_data->num_domains);
                if (ret)
                        return ret;
        } else {