ARM: tegra: clock: Use bus lock to protect shared bus update

Protected shared bus update with bus lock - common for all shared bus
users (update procedure was already covered by individual shared users
locks, but it did not prevent concurrent access to shared rates list).

Original-Change-Id: Ia0e6886265aff1f624802e0415fe8cecb887b507
Reviewed-on: http://git-master/r/39918
Reviewed-by: Varun Colbert <vcolbert@nvidia.com>
Tested-by: Varun Colbert <vcolbert@nvidia.com>

Rebase-Id: R0e0ee997ce9347470e207910f7b4f6c42143717f

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/arm/mach-tegra/clock.h b/arch/arm/mach-tegra/clock.h
index 4e4adf1803e4..33325470a3d3 100644
--- a/arch/arm/mach-tegra/clock.h
+++ b/arch/arm/mach-tegra/clock.h
@@ -91,6 +91,7 @@ struct clk_ops {
 	long		(*round_rate)(struct clk *, unsigned long);
 	int		(*clk_cfg_ex)(struct clk *, enum tegra_clk_ex_param, u32);
 	void		(*reset)(struct clk *, bool);
+	int		(*shared_bus_update)(struct clk *);
 };
 
 struct clk_stats {
@@ -227,6 +228,7 @@ unsigned long clk_get_max_rate(struct clk *c);
 unsigned long clk_get_min_rate(struct clk *c);
 unsigned long clk_get_rate_locked(struct clk *c);
 int clk_set_rate_locked(struct clk *c, unsigned long rate);
+int tegra_clk_shared_bus_update(struct clk *c);
 void tegra2_sdmmc_tap_delay(struct clk *c, int delay);
 int tegra_emc_set_rate(unsigned long rate);
 long tegra_emc_round_rate(unsigned long rate);