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ARM: shmobile: lager-reference: Work around core clock issues

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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>
This commit is contained in:
Simon Horman 2014-03-17 11:18:56 +09:00
parent 9e7b83c221
commit aa5de826af
1 changed files with 11 additions and 0 deletions
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11
arch/arm/mach-shmobile/board-lager-reference.c
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@ -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);