pinctrl: renesas: Fix pin control matching on R-Car H3e-2G

As R-Car H3 ES1.x (R8A77950) and R-Car ES2.0+ (R8A77951) use the same
compatible value, the pin control driver relies on soc_device_match()
with soc_id = "r8a7795" and the (non)matching of revision = "ES1.*" to
match with and distinguish between the two SoC variants.  The
corresponding entries in the normal of_match_table are present only to
make the optional sanity checks work.

The R-Car H3e-2G (R8A779M1) SoC is a different grading of the R-Car H3
ES3.0 (R8A77951) SoC.  It uses the same compatible values for individual
devices, but has an additional compatible value for the root node.
When running on an R-Car H3e-2G SoC, soc_device_match() with soc_id =
"r8a7795" does not return a match.  Hence the pin control driver falls
back to the normal of_match_table, and, as the R8A77950 entry is listed
first, incorrectly uses the sub-driver for R-Car H3 ES1.x.

Fix this by moving the entry for R8A77951 before the entry for R8A77950.
Simplify sh_pfc_quirk_match() to only handle R-Car H3 ES1,x, as R-Car H3
ES2.0+ can now be matched using the normal of_match_table as well.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/6cdc5bfa424461105779b56f455387e03560cf66.1626707688.git.geert+renesas@glider.be

diff --git a/drivers/pinctrl/renesas/core.c b/drivers/pinctrl/renesas/core.c
index 5ccc49b..f2ab022 100644 (file)
--- a/drivers/pinctrl/renesas/core.c
+++ b/drivers/pinctrl/renesas/core.c
@@ -571,17 +571,21 @@ static const struct of_device_id sh_pfc_of_table[] = {
                .data = &r8a7794_pinmux_info,
        },
 #endif
-/* Both r8a7795 entries must be present to make sanity checks work */
-#ifdef CONFIG_PINCTRL_PFC_R8A77950
+/*
+ * Both r8a7795 entries must be present to make sanity checks work, but only
+ * the first entry is actually used.
+ * R-Car H3 ES1.x is matched using soc_device_match() instead.
+ */
+#ifdef CONFIG_PINCTRL_PFC_R8A77951
        {
                .compatible = "renesas,pfc-r8a7795",
-               .data = &r8a77950_pinmux_info,
+               .data = &r8a77951_pinmux_info,
        },
 #endif
-#ifdef CONFIG_PINCTRL_PFC_R8A77951
+#ifdef CONFIG_PINCTRL_PFC_R8A77950
        {
                .compatible = "renesas,pfc-r8a7795",
-               .data = &r8a77951_pinmux_info,
+               .data = &r8a77950_pinmux_info,
        },
 #endif
 #ifdef CONFIG_PINCTRL_PFC_R8A77960
@@ -1085,26 +1089,20 @@ static inline void sh_pfc_check_driver(struct platform_driver *pdrv) {}
 #ifdef CONFIG_OF
 static const void *sh_pfc_quirk_match(void)
 {
-#if defined(CONFIG_PINCTRL_PFC_R8A77950) || \
-    defined(CONFIG_PINCTRL_PFC_R8A77951)
+#ifdef CONFIG_PINCTRL_PFC_R8A77950
        const struct soc_device_attribute *match;
        static const struct soc_device_attribute quirks[] = {
                {
                        .soc_id = "r8a7795", .revision = "ES1.*",
                        .data = &r8a77950_pinmux_info,
                },
-               {
-                       .soc_id = "r8a7795",
-                       .data = &r8a77951_pinmux_info,
-               },
-
                { /* sentinel */ }
        };
 
        match = soc_device_match(quirks);
        if (match)
-               return match->data ?: ERR_PTR(-ENODEV);
-#endif /* CONFIG_PINCTRL_PFC_R8A77950 || CONFIG_PINCTRL_PFC_R8A77951 */
+               return match->data;
+#endif /* CONFIG_PINCTRL_PFC_R8A77950 */
 
        return NULL;
 }
@@ -1119,9 +1117,6 @@ static int sh_pfc_probe(struct platform_device *pdev)
 #ifdef CONFIG_OF
        if (pdev->dev.of_node) {
                info = sh_pfc_quirk_match();
-               if (IS_ERR(info))
-                       return PTR_ERR(info);
-
                if (!info)
                        info = of_device_get_match_data(&pdev->dev);
        } else

diff --git a/drivers/pinctrl/renesas/sh_pfc.h b/drivers/pinctrl/renesas/sh_pfc.h
index bf9822e..2479b4f 100644 (file)
--- a/drivers/pinctrl/renesas/sh_pfc.h
+++ b/drivers/pinctrl/renesas/sh_pfc.h
@@ -332,8 +332,8 @@ extern const struct sh_pfc_soc_info r8a7791_pinmux_info;
 extern const struct sh_pfc_soc_info r8a7792_pinmux_info;
 extern const struct sh_pfc_soc_info r8a7793_pinmux_info;
 extern const struct sh_pfc_soc_info r8a7794_pinmux_info;
-extern const struct sh_pfc_soc_info r8a77950_pinmux_info __weak;
-extern const struct sh_pfc_soc_info r8a77951_pinmux_info __weak;
+extern const struct sh_pfc_soc_info r8a77950_pinmux_info;
+extern const struct sh_pfc_soc_info r8a77951_pinmux_info;
 extern const struct sh_pfc_soc_info r8a77960_pinmux_info;
 extern const struct sh_pfc_soc_info r8a77961_pinmux_info;
 extern const struct sh_pfc_soc_info r8a77965_pinmux_info;