From aa5de826afe747c353162bbc116c63ab5335f91c Mon Sep 17 00:00:00 2001
From: Simon Horman <horms+renesas@verge.net.au>
Date: Mon, 17 Mar 2014 11:18:56 +0900
Subject: [PATCH] ARM: shmobile: lager-reference: Work around core clock issues
Due to issues with runtime PM clock management, clocks not explicitly
managed by their drivers may not be enabled at all, or be inadvertently
disabled by the clk_disable_unused() late initcall.
Until this is fixed, add a temporary workaround, calling
shmobile_clk_workaround() with enable == true.
For now this enables the clocks for: ether, msiof1, qspi_mod, and
thermal. More clocks can be added if needed.
Based on work for the koelsch board by Geert Uytterhoeven.
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
---
arch/arm/mach-shmobile/board-lager-reference.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/arch/arm/mach-shmobile/board-lager-reference.c b/arch/arm/mach-shmobile/board-lager-reference.c
index 7ff395efa9fe..313118c5f365 100644
--- a/arch/arm/mach-shmobile/board-lager-reference.c
+++ b/arch/arm/mach-shmobile/board-lager-reference.c
@@ -108,9 +108,20 @@ static const struct clk_name clk_names[] __initconst = {
{ "lvds1", "lvds.1", "rcar-du-r8a7790" },
};
+/*
+ * This is a really crude hack to work around core platform clock issues
+ */
+static const struct clk_name clk_enables[] __initconst = {
+ { "ether", NULL, "ee700000.ethernet" },
+ { "msiof1", NULL, "e6e10000.spi" },
+ { "qspi_mod", NULL, "e6b10000.spi" },
+ { "thermal", NULL, "e61f0000.thermal" },
+};
+
static void __init lager_add_standard_devices(void)
{
shmobile_clk_workaround(clk_names, ARRAY_SIZE(clk_names), false);
+ shmobile_clk_workaround(clk_enables, ARRAY_SIZE(clk_enables), true);
r8a7790_add_dt_devices();
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
--
2.20.1