diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-s3c2443/clock.c | 85 | ||||
| -rw-r--r-- | arch/arm/plat-s3c24xx/s3c2443-clock.c | 87 |
2 files changed, 89 insertions, 83 deletions
diff --git a/arch/arm/mach-s3c2443/clock.c b/arch/arm/mach-s3c2443/clock.c index 88edc55838a..6fda4bf09cd 100644 --- a/arch/arm/mach-s3c2443/clock.c +++ b/arch/arm/mach-s3c2443/clock.c @@ -61,10 +61,10 @@ * * this clock is sourced from msysclk and can have a number of * divider values applied to it to then be fed into armclk. + * The real clock definition is done in s3c2443-clock.c, + * only the armdiv divisor table must be defined here. */ -/* armdiv divisor table */ - static unsigned int armdiv[16] = { [S3C2443_CLKDIV0_ARMDIV_1 >> S3C2443_CLKDIV0_ARMDIV_SHIFT] = 1, [S3C2443_CLKDIV0_ARMDIV_2 >> S3C2443_CLKDIV0_ARMDIV_SHIFT] = 2, @@ -83,85 +83,6 @@ static inline unsigned int s3c2443_fclk_div(unsigned long clkcon0) return armdiv[clkcon0 >> S3C2443_CLKDIV0_ARMDIV_SHIFT]; } -static unsigned long s3c2443_armclk_roundrate(struct clk *clk, - unsigned long rate) -{ - unsigned long parent = clk_get_rate(clk->parent); - unsigned long calc; - unsigned best = 256; /* bigger than any value */ - unsigned div; - int ptr; - - for (ptr = 0; ptr < ARRAY_SIZE(armdiv); ptr++) { - div = armdiv[ptr]; - calc = parent / div; - if (calc <= rate && div < best) - best = div; - } - - return parent / best; -} - -static int s3c2443_armclk_setrate(struct clk *clk, unsigned long rate) -{ - unsigned long parent = clk_get_rate(clk->parent); - unsigned long calc; - unsigned div; - unsigned best = 256; /* bigger than any value */ - int ptr; - int val = -1; - - for (ptr = 0; ptr < ARRAY_SIZE(armdiv); ptr++) { - div = armdiv[ptr]; - calc = parent / div; - if (calc <= rate && div < best) { - best = div; - val = ptr; - } - } - - if (val >= 0) { - unsigned long clkcon0; - - clkcon0 = __raw_readl(S3C2443_CLKDIV0); - clkcon0 &= ~S3C2443_CLKDIV0_ARMDIV_MASK; - clkcon0 |= val << S3C2443_CLKDIV0_ARMDIV_SHIFT; - __raw_writel(clkcon0, S3C2443_CLKDIV0); - } - - return (val == -1) ? -EINVAL : 0; -} - -static struct clk clk_armdiv = { - .name = "armdiv", - .parent = &clk_msysclk.clk, - .ops = &(struct clk_ops) { - .round_rate = s3c2443_armclk_roundrate, - .set_rate = s3c2443_armclk_setrate, - }, -}; - -/* armclk - * - * this is the clock fed into the ARM core itself, from armdiv or from hclk. - */ - -static struct clk *clk_arm_sources[] = { - [0] = &clk_armdiv, - [1] = &clk_h, -}; - -static struct clksrc_clk clk_arm = { - .clk = { - .name = "armclk", - }, - .sources = &(struct clksrc_sources) { - .sources = clk_arm_sources, - .nr_sources = ARRAY_SIZE(clk_arm_sources), - }, - .reg_src = { .reg = S3C2443_CLKDIV0, .size = 1, .shift = 13 }, -}; - /* hsspi * * high-speed spi clock, sourced from esysclk @@ -260,14 +181,12 @@ static struct clk init_clocks[] = { /* clocks to add straight away */ static struct clksrc_clk *clksrcs[] __initdata = { - &clk_arm, &clk_hsspi, &clk_hsmmc_div, }; static struct clk *clks[] __initdata = { &clk_hsmmc, - &clk_armdiv, }; void __init_or_cpufreq s3c2443_setup_clocks(void) diff --git a/arch/arm/plat-s3c24xx/s3c2443-clock.c b/arch/arm/plat-s3c24xx/s3c2443-clock.c index 3f2117b8c0d..f9c5b0343cf 100644 --- a/arch/arm/plat-s3c24xx/s3c2443-clock.c +++ b/arch/arm/plat-s3c24xx/s3c2443-clock.c @@ -160,10 +160,95 @@ static struct clk clk_prediv = { }, }; +/* 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 unsigned int *armdiv; static int nr_armdiv; static int armdivmask; +static unsigned long s3c2443_armclk_roundrate(struct clk *clk, + unsigned long rate) +{ + unsigned long parent = clk_get_rate(clk->parent); + unsigned long calc; + unsigned best = 256; /* bigger than any value */ + unsigned div; + int ptr; + + for (ptr = 0; ptr < nr_armdiv; ptr++) { + div = armdiv[ptr]; + calc = parent / div; + if (calc <= rate && div < best) + best = div; + } + + return parent / best; +} + +static int s3c2443_armclk_setrate(struct clk *clk, unsigned long rate) +{ + unsigned long parent = clk_get_rate(clk->parent); + unsigned long calc; + unsigned div; + unsigned best = 256; /* bigger than any value */ + int ptr; + int val = -1; + + for (ptr = 0; ptr < nr_armdiv; ptr++) { + div = armdiv[ptr]; + calc = parent / div; + if (calc <= rate && div < best) { + best = div; + val = ptr; + } + } + + if (val >= 0) { + unsigned long clkcon0; + + clkcon0 = __raw_readl(S3C2443_CLKDIV0); + clkcon0 &= ~armdivmask; + clkcon0 |= val << S3C2443_CLKDIV0_ARMDIV_SHIFT; + __raw_writel(clkcon0, S3C2443_CLKDIV0); + } + + return (val == -1) ? -EINVAL : 0; +} + +static struct clk clk_armdiv = { + .name = "armdiv", + .parent = &clk_msysclk.clk, + .ops = &(struct clk_ops) { + .round_rate = s3c2443_armclk_roundrate, + .set_rate = s3c2443_armclk_setrate, + }, +}; + +/* armclk + * + * this is the clock fed into the ARM core itself, from armdiv or from hclk. + */ + +static struct clk *clk_arm_sources[] = { + [0] = &clk_armdiv, + [1] = &clk_h, +}; + +static struct clksrc_clk clk_arm = { + .clk = { + .name = "armclk", + }, + .sources = &(struct clksrc_sources) { + .sources = clk_arm_sources, + .nr_sources = ARRAY_SIZE(clk_arm_sources), + }, + .reg_src = { .reg = S3C2443_CLKDIV0, .size = 1, .shift = 13 }, +}; + /* usbhost * * usb host bus-clock, usually 48MHz to provide USB bus clock timing @@ -462,6 +547,7 @@ static struct clk *clks[] __initdata = { &clk_ext, &clk_epll, &clk_usb_bus, + &clk_armdiv, }; static struct clksrc_clk *clksrcs[] __initdata = { @@ -471,6 +557,7 @@ static struct clksrc_clk *clksrcs[] __initdata = { &clk_epllref, &clk_esysclk, &clk_msysclk, + &clk_arm, }; void __init s3c2443_common_init_clocks(int xtal, pll_fn get_mpll, |