diff options
| -rw-r--r-- | arch/arm/mach-s3c2443/clock.c | 54 |
1 files changed, 53 insertions, 1 deletions
diff --git a/arch/arm/mach-s3c2443/clock.c b/arch/arm/mach-s3c2443/clock.c index 24da9241..d34f3d3 100644 --- a/arch/arm/mach-s3c2443/clock.c +++ b/arch/arm/mach-s3c2443/clock.c @@ -221,7 +221,6 @@ static struct clk clk_mdivclk = { .get_rate = s3c2443_getrate_mdivclk, }; - static int s3c2443_setparent_msysclk(struct clk *clk, struct clk *parent) { unsigned long clksrc = __raw_readl(S3C2443_CLKSRC); @@ -249,6 +248,46 @@ static struct clk clk_msysclk = { .set_parent = s3c2443_setparent_msysclk, }; +/* armdiv + * + * this clock is sourced from msysclk and can have a number of + * divider values applied to it to then be fed into armclk. +*/ + +static struct clk clk_armdiv = { + .name = "armdiv", + .id = -1, + .parent = &clk_msysclk, +}; + +/* armclk + * + * this is the clock fed into the ARM core itself, either from + * armdiv or from hclk. + */ + +static int s3c2443_setparent_armclk(struct clk *clk, struct clk *parent) +{ + unsigned long clkdiv0; + + clkdiv0 = __raw_readl(S3C2443_CLKDIV0); + + if (parent == &clk_armdiv) + clkdiv0 &= ~S3C2443_CLKDIV0_DVS; + else if (parent == &clk_h) + clkdiv0 |= S3C2443_CLKDIV0_DVS; + else + return -EINVAL; + + __raw_writel(clkdiv0, S3C2443_CLKDIV0); + return 0; +} + +static struct clk clk_arm = { + .name = "armclk", + .id = -1, + .set_parent = s3c2443_setparent_armclk, +}; /* esysclk * @@ -887,6 +926,15 @@ static void __init s3c2443_clk_initparents(void) } clk_init_set_parent(&clk_msysclk, parent); + + /* arm */ + + if (__raw_readl(S3C2443_CLKDIV0) & S3C2443_CLKDIV0_DVS) + parent = &clk_h; + else + parent = &clk_armdiv; + + clk_init_set_parent(&clk_arm, parent); } /* armdiv divisor table */ @@ -936,6 +984,8 @@ static struct clk *clks[] __initdata = { &clk_hsspi, &clk_hsmmc_div, &clk_hsmmc, + &clk_armdiv, + &clk_arm, }; void __init s3c2443_init_clocks(int xtal) @@ -958,6 +1008,8 @@ void __init s3c2443_init_clocks(int xtal) hclk = hclk / ((clkdiv0 & S3C2443_CLKDIV0_HALF_HCLK) ? 2 : 1); pclk = hclk / ((clkdiv0 & S3C2443_CLKDIV0_HALF_PCLK) ? 2 : 1); + clk_armdiv.rate = fclk; + s3c24xx_setup_clocks(xtal, fclk, hclk, pclk); printk("S3C2443: mpll %s %ld.%03ld MHz, cpu %ld.%03ld MHz, mem %ld.%03ld MHz, pclk %ld.%03ld MHz\n", |
