soc: renesas: r8a7796-sysc: Fix power request conflicts

Describe the location and contents of the SYSCEXTMASK register on R-Car
M3-W, to prevent conflicts between internal and external power requests.

This register does not exist on R-Car M3-W ES1.x.

Based on a patch in the BSP by Dien Pham <dien.pham.ry@renesas.com>.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Link: https://lore.kernel.org/r/20190828113618.6672-4-geert+renesas@glider.be

diff --git a/drivers/soc/renesas/r8a7796-sysc.c b/drivers/soc/renesas/r8a7796-sysc.c
index 1b06f868b6e81c798dfb17614ad53e96a6f23f47..a4eaa8d1f5d0f49d11654c7db71da359c1621140 100644 (file)
--- a/drivers/soc/renesas/r8a7796-sysc.c
+++ b/drivers/soc/renesas/r8a7796-sysc.c
@@ -5,8 +5,10 @@
  * Copyright (C) 2016 Glider bvba
  */
 
+#include <linux/bits.h>
 #include <linux/bug.h>
 #include <linux/kernel.h>
+#include <linux/sys_soc.h>
 
 #include <dt-bindings/power/r8a7796-sysc.h>
 
@@ -39,7 +41,25 @@ static const struct rcar_sysc_area r8a7796_areas[] __initconst = {
        { "a3ir",       0x180, 0, R8A7796_PD_A3IR,      R8A7796_PD_ALWAYS_ON },
 };
 
-const struct rcar_sysc_info r8a7796_sysc_info __initconst = {
+
+/* Fixups for R-Car M3-W ES1.x revision */
+static const struct soc_device_attribute r8a7796es1[] __initconst = {
+       { .soc_id = "r8a7796", .revision = "ES1.*" },
+       { /* sentinel */ }
+};
+
+static int __init r8a7796_sysc_init(void)
+{
+       if (soc_device_match(r8a7796es1))
+               r8a7796_sysc_info.extmask_val = 0;
+
+       return 0;
+}
+
+struct rcar_sysc_info r8a7796_sysc_info __initdata = {
+       .init = r8a7796_sysc_init,
        .areas = r8a7796_areas,
        .num_areas = ARRAY_SIZE(r8a7796_areas),
+       .extmask_offs = 0x2f8,
+       .extmask_val = BIT(0),
 };

diff --git a/drivers/soc/renesas/rcar-sysc.h b/drivers/soc/renesas/rcar-sysc.h
index 499797a9e18c2f105f54c8d782e8ce4d6079d613..64c2a0fa7945d80b3f295f175ab70026cb0042cd 100644 (file)
--- a/drivers/soc/renesas/rcar-sysc.h
+++ b/drivers/soc/renesas/rcar-sysc.h
@@ -60,7 +60,7 @@ extern const struct rcar_sysc_info r8a7791_sysc_info;
 extern const struct rcar_sysc_info r8a7792_sysc_info;
 extern const struct rcar_sysc_info r8a7794_sysc_info;
 extern struct rcar_sysc_info r8a7795_sysc_info;
-extern const struct rcar_sysc_info r8a7796_sysc_info;
+extern struct rcar_sysc_info r8a7796_sysc_info;
 extern const struct rcar_sysc_info r8a77965_sysc_info;
 extern const struct rcar_sysc_info r8a77970_sysc_info;
 extern const struct rcar_sysc_info r8a77980_sysc_info;