diff options
| author | Laxman Dewangan <ldewangan@nvidia.com> | 2012-02-19 11:28:10 +0530 |
|---|---|---|
| committer | Simone Willett <swillett@nvidia.com> | 2012-02-21 10:32:59 -0800 |
| commit | 15e65f291f12c084c18956263ee61f005caf8a9e (patch) | |
| tree | 091fd73ab3c630bb379525c4606757813dfd69a0 /arch/arm/mach-tegra/tegra3_clocks.c | |
| parent | 8c2d09c318f905bd8c1cf451501e20c903fcaaef (diff) | |
ARM: tegra: clock: Support for clock source control without enable bit
Some of controller like i2c requires a different clock source which is
not enabled/disabled by the clock bit in CAR register set.
Handling such cases by looking for PERIPH_NO_ENB flag when calling clock
enable/disable functions.
Change-Id: Id0d1df7946d1c83d769116ae7a91546bd59d4478
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/84709
Reviewed-by: Simone Willett <swillett@nvidia.com>
Tested-by: Simone Willett <swillett@nvidia.com>
Diffstat (limited to 'arch/arm/mach-tegra/tegra3_clocks.c')
| -rw-r--r-- | arch/arm/mach-tegra/tegra3_clocks.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/tegra3_clocks.c b/arch/arm/mach-tegra/tegra3_clocks.c index 85c907bbad0d..97e7aa2bb976 100644 --- a/arch/arm/mach-tegra/tegra3_clocks.c +++ b/arch/arm/mach-tegra/tegra3_clocks.c @@ -2100,6 +2100,10 @@ static void tegra3_periph_clk_init(struct clk *c) } c->state = ON; + + if (c->flags & PERIPH_NO_ENB) + return; + if (!(clk_readl(PERIPH_CLK_TO_ENB_REG(c)) & PERIPH_CLK_TO_BIT(c))) c->state = OFF; if (!(c->flags & PERIPH_NO_RESET)) @@ -2112,6 +2116,9 @@ static int tegra3_periph_clk_enable(struct clk *c) unsigned long flags; pr_debug("%s on clock %s\n", __func__, c->name); + if (c->flags & PERIPH_NO_ENB) + return 0; + spin_lock_irqsave(&periph_refcount_lock, flags); tegra_periph_clk_enable_refcount[c->u.periph.clk_num]++; @@ -2136,6 +2143,9 @@ static void tegra3_periph_clk_disable(struct clk *c) unsigned long val, flags; pr_debug("%s on clock %s\n", __func__, c->name); + if (c->flags & PERIPH_NO_ENB) + return; + spin_lock_irqsave(&periph_refcount_lock, flags); if (c->refcnt) @@ -2160,6 +2170,9 @@ static void tegra3_periph_clk_reset(struct clk *c, bool assert) pr_debug("%s %s on clock %s\n", __func__, assert ? "assert" : "deassert", c->name); + if (c->flags & PERIPH_NO_ENB) + return; + if (!(c->flags & PERIPH_NO_RESET)) { if (assert) { /* If peripheral is in the APB bus then read the APB |