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>

diff --git a/arch/arm/mach-shmobile/board-lager-reference.c b/arch/arm/mach-shmobile/board-lager-reference.c
index 7ff395efa9fe336e467d4689f2cd86774d778dd3..313118c5f365102deb3526489a1f729c3444c7aa 100644 (file)
--- 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);