Hi Kukjin, On 14 June 2011 11:03, Kukjin Kim <kgene.kim@xxxxxxxxxxx> wrote: > Naveen Krishna Chatradhi wrote: >> >> This patch adds EPLL specific clock get_rate/set_rate >> operations on EXYNOS4. >> >> Note: Initial code from S5PV210 >> http://permalink.gmane.org/gmane.linux.alsa.devel/77519 >> >> Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@xxxxxxxxxxx> >> --- >> arch/arm/mach-exynos4/clock.c | 78 >> +++++++++++++++++++++++++++++++++++++++++ >> 1 files changed, 78 insertions(+), 0 deletions(-) >> >> diff --git a/arch/arm/mach-exynos4/clock.c b/arch/arm/mach-exynos4/clock.c >> index b1b93b9..7aa4aef 100644 >> --- a/arch/arm/mach-exynos4/clock.c >> +++ b/arch/arm/mach-exynos4/clock.c >> @@ -1276,6 +1276,82 @@ static struct clksrc_clk *sysclks[] = { >> &clk_sclk_audio2, >> }; >> >> +static u32 epll_div[][6] = { >> + { 48000000, 0, 48, 3, 3, 0 }, >> + { 96000000, 0, 48, 3, 2, 0 }, >> + { 144000000, 1, 72, 3, 2, 0 }, >> + { 192000000, 0, 48, 3, 1, 0 }, >> + { 288000000, 1, 72, 3, 1, 0 }, >> + { 32750000, 1, 65, 3, 4, 35127 }, >> + { 32768000, 1, 65, 3, 4, 35127 }, >> + { 45158400, 0, 45, 3, 3, 10355 }, >> + { 45000000, 0, 45, 3, 3, 10355 }, >> + { 45158000, 0, 45, 3, 3, 10355 }, >> + { 49125000, 0, 49, 3, 3, 9961 }, >> + { 49152000, 0, 49, 3, 3, 9961 }, >> + { 67737600, 1, 67, 3, 3, 48366 }, >> + { 67738000, 1, 67, 3, 3, 48366 }, >> + { 73800000, 1, 73, 3, 3, 47710 }, >> + { 73728000, 1, 73, 3, 3, 47710 }, >> + { 36000000, 1, 32, 3, 4, 0 }, >> + { 60000000, 1, 60, 3, 3, 0 }, >> + { 72000000, 1, 72, 3, 3, 0 }, >> + { 80000000, 1, 80, 3, 3, 0 }, >> + { 84000000, 0, 42, 3, 2, 0 }, >> + { 50000000, 0, 50, 3, 3, 0 }, >> +}; >> + >> +static int exynos4_epll_set_rate(struct clk *clk, unsigned long rate) >> +{ >> + unsigned int epll_con, epll_con_k; >> + unsigned int i; >> + >> + /* Return if nothing changed */ >> + if (clk->rate == rate) >> + return 0; >> + >> + epll_con = __raw_readl(S5P_EPLL_CON); >> + epll_con_k = __raw_readl(S5P_EPLL_CON1); >> + >> + epll_con_k &= ~PLL46XX_KDIV_MASK; >> + epll_con &= ~(1 << 27 | >> + PLL46XX_MDIV_MASK << PLL46XX_MDIV_SHIFT | >> + PLL46XX_PDIV_MASK << PLL46XX_PDIV_SHIFT | >> + PLL46XX_SDIV_MASK << PLL46XX_SDIV_SHIFT); >> + >> + for (i = 0; i < ARRAY_SIZE(epll_div); i++) { >> + if (epll_div[i][0] == rate) { >> + epll_con_k |= epll_div[i][5] << 0; >> + epll_con |= (epll_div[i][1] << 27 | >> + epll_div[i][2] << >> PLL46XX_MDIV_SHIFT | >> + epll_div[i][3] << >> PLL46XX_PDIV_SHIFT | >> + epll_div[i][4] << >> PLL46XX_SDIV_SHIFT); >> + break; >> + } >> + } >> + >> + if (i == ARRAY_SIZE(epll_div)) { >> + printk(KERN_ERR "%s: Invalid Clock EPLL Frequency\n", >> + __func__); >> + return -EINVAL; >> + } >> + >> + __raw_writel(epll_con, S5P_EPLL_CON); >> + __raw_writel(epll_con_k, S5P_EPLL_CON1); >> + >> + printk(KERN_WARNING "EPLL Rate changes from %lu to %lu\n", >> + clk->rate, rate); >> + >> + clk->rate = rate; >> + >> + return 0; >> +} > > I think, this is same with S5PV210. This is exactly similar to V210 as mentioned in the commit message. > > Would be better if this could be moved into plat-s5p/ with other set_pllXXX. I'm preparing patch to move the epll_set_rate as common function across s5p series. Will send it soon. > >> + >> +static struct clk_ops exynos4_epll_ops = { >> + .set_rate = exynos4_epll_set_rate, >> + .get_rate = s5p_epll_get_rate, >> +}; >> + >> static int xtal_rate; >> >> static unsigned long exynos4_fout_apll_get_rate(struct clk *clk) >> @@ -1354,6 +1430,8 @@ void __init_or_cpufreq exynos4_setup_clocks(void) >> for (ptr = 0; ptr < ARRAY_SIZE(clksrcs); ptr++) >> s3c_set_clksrc(&clksrcs[ptr], true); >> >> + clk_fout_epll.ops = &exynos4_epll_ops; >> + >> clk_audiocdclk0.rate = PCM_EXTCLK0; >> clk_set_parent(&clk_sclk_audio0.clk, &clk_audiocdclk0); >> } >> -- > > > > Thanks. > > Best regards, > Kgene. > -- > Kukjin Kim <kgene.kim@xxxxxxxxxxx>, Senior Engineer, > SW Solution Development Team, Samsung Electronics Co., Ltd. > > -- > To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- Shine bright, (: Nav :) -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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