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ARM: S5PV210: Add EPLL clock operations

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This patch adds EPLL specific clock get_rate/set_rate operations
on S5PV210.

Signed-off-by: Seungwhan Youn <sw.youn@samsung.com>
Acked-by: Jassi Brar <jassi.brar@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Seungwhan Youn 2010-10-14 10:39:28 +09:00 committed by Kukjin Kim
parent 42a6e20e4f
commit c9fa7a08cc
1 changed files with 77 additions and 0 deletions
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77
arch/arm/mach-s5pv210/clock.c
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@ -1046,6 +1046,79 @@ static struct clksrc_clk *sysclks[] = {
&clk_sclk_spdif,
};
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 s5pv210_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);
clk->rate = rate;
return 0;
}
static struct clk_ops s5pv210_epll_ops = {
.set_rate = s5pv210_epll_set_rate,
.get_rate = s5p_epll_get_rate,
};
void __init_or_cpufreq s5pv210_setup_clocks(void)
{
struct clk *xtal_clk;
@ -1064,6 +1137,10 @@ void __init_or_cpufreq s5pv210_setup_clocks(void)
unsigned int ptr;
u32 clkdiv0, clkdiv1;
/* Set functions for clk_fout_epll */
clk_fout_epll.enable = s5p_epll_enable;
clk_fout_epll.ops = &s5pv210_epll_ops;
printk(KERN_DEBUG "%s: registering clocks\n", __func__);
clkdiv0 = __raw_readl(S5P_CLK_DIV0);