diff options
Diffstat (limited to 'arch/arm/mach-tegra/tegra2_clocks.c')
| -rw-r--r-- | arch/arm/mach-tegra/tegra2_clocks.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/arch/arm/mach-tegra/tegra2_clocks.c b/arch/arm/mach-tegra/tegra2_clocks.c index ea07f51..94793dd 100644 --- a/arch/arm/mach-tegra/tegra2_clocks.c +++ b/arch/arm/mach-tegra/tegra2_clocks.c @@ -385,10 +385,16 @@ static void tegra2_cpu_clk_disable(struct clk *c) static int tegra2_cpu_clk_set_rate(struct clk *c, unsigned long rate) { int ret; + /* + * Take an extra reference to the main pll so it doesn't turn + * off when we move the cpu off of it + */ + clk_enable(c->u.cpu.main); + ret = clk_set_parent(c->parent, c->u.cpu.backup); if (ret) { pr_err("Failed to switch cpu to clock %s\n", c->u.cpu.backup->name); - return ret; + goto out; } if (rate == clk_get_rate(c->u.cpu.backup)) @@ -397,17 +403,18 @@ static int tegra2_cpu_clk_set_rate(struct clk *c, unsigned long rate) ret = clk_set_rate(c->u.cpu.main, rate); if (ret) { pr_err("Failed to change cpu pll to %lu\n", rate); - return ret; + goto out; } ret = clk_set_parent(c->parent, c->u.cpu.main); if (ret) { pr_err("Failed to switch cpu to clock %s\n", c->u.cpu.main->name); - return ret; + goto out; } out: - return 0; + clk_disable(c->u.cpu.main); + return ret; } static struct clk_ops tegra_cpu_ops = { |