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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-10-28 11:13:00 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-10-28 11:13:00 +0100 |
| commit | 9ae21ca362679757786f5abe556c7943e9001426 (patch) | |
| tree | db4ab371195fed9d327745eaf12c912f3f74f0e2 /arch/arm/mach-mx5/clock-mx51.c | |
| parent | 12ba8d1e9262ce81a695795410bd9ee5c9407ba1 (diff) | |
| parent | a3484ffd2acc196ca934369395fe9aac63ed1a47 (diff) | |
Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6 into devel-stable
Diffstat (limited to 'arch/arm/mach-mx5/clock-mx51.c')
| -rw-r--r-- | arch/arm/mach-mx5/clock-mx51.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/arch/arm/mach-mx5/clock-mx51.c b/arch/arm/mach-mx5/clock-mx51.c index f2aae92cf0e..8ac36d88292 100644 --- a/arch/arm/mach-mx5/clock-mx51.c +++ b/arch/arm/mach-mx5/clock-mx51.c @@ -362,7 +362,7 @@ static int _clk_lp_apm_set_parent(struct clk *clk, struct clk *parent) return 0; } -static unsigned long clk_arm_get_rate(struct clk *clk) +static unsigned long clk_cpu_get_rate(struct clk *clk) { u32 cacrr, div; unsigned long parent_rate; @@ -374,6 +374,22 @@ static unsigned long clk_arm_get_rate(struct clk *clk) return parent_rate / div; } +static int clk_cpu_set_rate(struct clk *clk, unsigned long rate) +{ + u32 reg, cpu_podf; + unsigned long parent_rate; + + parent_rate = clk_get_rate(clk->parent); + cpu_podf = parent_rate / rate - 1; + /* use post divider to change freq */ + reg = __raw_readl(MXC_CCM_CACRR); + reg &= ~MXC_CCM_CACRR_ARM_PODF_MASK; + reg |= cpu_podf << MXC_CCM_CACRR_ARM_PODF_OFFSET; + __raw_writel(reg, MXC_CCM_CACRR); + + return 0; +} + static int _clk_periph_apm_set_parent(struct clk *clk, struct clk *parent) { u32 reg, mux; @@ -736,7 +752,8 @@ static struct clk periph_apm_clk = { static struct clk cpu_clk = { .parent = &pll1_sw_clk, - .get_rate = clk_arm_get_rate, + .get_rate = clk_cpu_get_rate, + .set_rate = clk_cpu_set_rate, }; static struct clk ahb_clk = { @@ -1064,6 +1081,7 @@ static struct clk_lookup lookups[] = { _REGISTER_CLOCK("imx51-cspi.0", NULL, cspi_clk) _REGISTER_CLOCK("sdhci-esdhc-imx.0", NULL, esdhc1_clk) _REGISTER_CLOCK("sdhci-esdhc-imx.1", NULL, esdhc2_clk) + _REGISTER_CLOCK(NULL, "cpu_clk", cpu_clk) }; static void clk_tree_init(void) |