soc: renesas: rcar-sysc: Add support for R-Car H3 ES2.0

Power area A2VC0 was removed in revision ES2.0, cfr. R-Car Gen3 Hardware
User's Manual rev. 0.53E.

Hence remove it from the power area table when not running on ES1.x.

This is in line with the goal to:
  1. Support both the ES1.x and ES2.0 SoC revisions in a single binary
     for now,
  2. Make it clear which code supports ES1.x, so it can easily be
     identified and removed later, when production SoCs are deemed
     ubiquitous.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

2 files changed, 25 insertions, 3 deletions

diff --git a/drivers/soc/renesas/r8a7795-sysc.c b/drivers/soc/renesas/r8a7795-sysc.c
index 5e7537c96f7b..7412666187b3 100644
--- a/drivers/soc/renesas/r8a7795-sysc.c
+++ b/drivers/soc/renesas/r8a7795-sysc.c
@@ -1,7 +1,7 @@
 /*
  * Renesas R-Car H3 System Controller
  *
- * Copyright (C) 2016 Glider bvba
+ * Copyright (C) 2016-2017 Glider bvba
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -10,12 +10,13 @@
 
 #include <linux/bug.h>
 #include <linux/kernel.h>
+#include <linux/sys_soc.h>
 
 #include <dt-bindings/power/r8a7795-sysc.h>
 
 #include "rcar-sysc.h"
 
-static const struct rcar_sysc_area r8a7795_areas[] __initconst = {
+static struct rcar_sysc_area r8a7795_areas[] __initdata = {
         { "always-on",      0, 0, R8A7795_PD_ALWAYS_ON, -1, PD_ALWAYS_ON },
         { "ca57-scu",   0x1c0, 0, R8A7795_PD_CA57_SCU,  R8A7795_PD_ALWAYS_ON,
           PD_SCU },
@@ -40,6 +41,7 @@ static const struct rcar_sysc_area r8a7795_areas[] __initconst = {
         { "a3vp",       0x340, 0, R8A7795_PD_A3VP,      R8A7795_PD_ALWAYS_ON },
         { "cr7",        0x240, 0, R8A7795_PD_CR7,       R8A7795_PD_ALWAYS_ON },
         { "a3vc",       0x380, 0, R8A7795_PD_A3VC,      R8A7795_PD_ALWAYS_ON },
+        /* A2VC0 exists on ES1.x only */
         { "a2vc0",      0x3c0, 0, R8A7795_PD_A2VC0,     R8A7795_PD_A3VC },
         { "a2vc1",      0x3c0, 1, R8A7795_PD_A2VC1,     R8A7795_PD_A3VC },
         { "3dg-a",      0x100, 0, R8A7795_PD_3DG_A,     R8A7795_PD_ALWAYS_ON },
@@ -50,7 +52,27 @@ static const struct rcar_sysc_area r8a7795_areas[] __initconst = {
         { "a3ir",       0x180, 0, R8A7795_PD_A3IR,      R8A7795_PD_ALWAYS_ON },
 };
 
+
+        /*
+         * Fixups for R-Car H3 revisions after ES1.x
+         */
+
+static const struct soc_device_attribute r8a7795es1[] __initconst = {
+        { .soc_id = "r8a7795", .revision = "ES1.*" },
+        { /* sentinel */ }
+};
+
+static int __init r8a7795_sysc_init(void)
+{
+        if (!soc_device_match(r8a7795es1))
+                rcar_sysc_nullify(r8a7795_areas, ARRAY_SIZE(r8a7795_areas),
+                                  R8A7795_PD_A2VC0);
+
+        return 0;
+}
+
 const struct rcar_sysc_info r8a7795_sysc_info __initconst = {
+        .init = r8a7795_sysc_init,
         .areas = r8a7795_areas,
         .num_areas = ARRAY_SIZE(r8a7795_areas),
 };
diff --git a/include/dt-bindings/power/r8a7795-sysc.h b/include/dt-bindings/power/r8a7795-sysc.h
index ee2e26ba605e..ad679eeda137 100644
--- a/include/dt-bindings/power/r8a7795-sysc.h
+++ b/include/dt-bindings/power/r8a7795-sysc.h
@@ -33,7 +33,7 @@
 #define R8A7795_PD_CA53_SCU             21
 #define R8A7795_PD_3DG_E                22
 #define R8A7795_PD_A3IR                 24
-#define R8A7795_PD_A2VC0                25
+#define R8A7795_PD_A2VC0                25      /* ES1.x only */
 #define R8A7795_PD_A2VC1                26
 
 /* Always-on power area */