[ARM] tegra: Add clock support

v2: fixes from Russell King:
	- include linux/io.h instead of asm/io.h
	- fix whitespace in Kconfig
	- Use spin_lock_init to initialize lock
	- Return -ENOSYS instead of BUG for unimplemented clock ops
	- Use proper return values in tegra2 clock ops
    additional changes:
	- Rename some clocks to match dev_ids
	- add rate propagation
	- add debugfs entries
	- add support for clock listed in clk_lookup under multiple dev_ids
v3:
	- Replace per-clock locking with global clock lock
	- Autodetect clock state on init
	- Let clock dividers pick next lower possible frequency
	- Add support for clock init tables
	- Minor bug fixes
	- Fix checkpatch issues

Signed-off-by: Colin Cross <ccross@android.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/arch/arm/mach-tegra/common.c b/arch/arm/mach-tegra/common.c
index 20875ee..039a514 100644
--- a/arch/arm/mach-tegra/common.c
+++ b/arch/arm/mach-tegra/common.c
@@ -25,6 +25,21 @@
 #include <mach/iomap.h>
 
 #include "board.h"
+#include "clock.h"
+
+static __initdata struct tegra_clk_init_table common_clk_init_table[] = {
+	/* name		parent		rate		enabled */
+	{ "clk_m",	NULL,		0,		true },
+	{ "pll_p",	"clk_m",	216000000,	true },
+	{ "pll_p_out1",	"pll_p",	28800000,	true },
+	{ "pll_p_out2",	"pll_p",	48000000,	true },
+	{ "pll_p_out3",	"pll_p",	72000000,	true },
+	{ "pll_p_out4",	"pll_p",	108000000,	true },
+	{ "sys",	"pll_p_out4",	108000000,	true },
+	{ "hclk",	"sys",		108000000,	true },
+	{ "pclk",	"hclk",		54000000,	true },
+	{ NULL,		NULL,		0,		0},
+};
 
 void __init tegra_init_cache(void)
 {
@@ -40,5 +55,7 @@ void __init tegra_init_cache(void)
 
 void __init tegra_common_init(void)
 {
+	tegra_init_clock();
+	tegra_clk_init_from_table(common_clk_init_table);
 	tegra_init_cache();
 }