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ARM: S5P6440: Remove usage of clk_arm and add clk_armclk clock 

The clk_arm clock is of type 'struct clk' whereas on S5P6440,
the arm clock is more suitable to be of type 'struct clksrc_clk'
(since arm clock is divided version of apll clock).

This patch modifies the following.

1. Removes the usage of clk_arm clock (defined in plat-s5p) and
   defines the new clock 'clk_armclk' of type 'struct clksrc_clk'.

2. Rearranges the assignment of clock rate for the fout_a/m/epll
   clocks. This will help in calculating the clock rate of fclk
   from clk_armclk clock and setup the clock rate for fout_m/epll
   for subsequent patches which depend on it.

3. Modifies the clock rate calculation of fclk to be based on
   the newly added clk_armclk clock.

Signed-off-by: Thomas Abraham <thomas.ab@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Thomas Abraham 2010-05-13 09:27:04 +09:00 committed by Ben Dooks
parent 30d5834960
commit 9c72d016e2
1 changed files with 16 additions and 7 deletions
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23
arch/arm/mach-s5p6440/clock.c
View File

@ -247,6 +247,16 @@ static struct clk_ops s5p6440_clkarm_ops = {
.round_rate = s5p6440_armclk_round_rate,
};
static struct clksrc_clk clk_armclk = {
.clk = {
.name = "armclk",
.id = 1,
.parent = &clk_mout_apll.clk,
.ops = &s5p6440_clkarm_ops,
},
.reg_div = { .reg = S5P_CLK_DIV0, .shift = 0, .size = 4 },
};
static struct clksrc_clk clk_dout_mpll = {
.clk = {
.name = "dout_mpll",
@ -569,6 +579,7 @@ static struct clksrc_clk *sysclks[] = {
&clk_mout_epll,
&clk_mout_mpll,
&clk_dout_mpll,
&clk_armclk,
};
void __init_or_cpufreq s5p6440_setup_clocks(void)
@ -592,8 +603,6 @@ void __init_or_cpufreq s5p6440_setup_clocks(void)
clk_fout_epll.ops = &s5p6440_epll_ops;
/* Set S5P6440 functions for arm clock */
clk_arm.parent = &clk_mout_apll.clk;
clk_arm.ops = &s5p6440_clkarm_ops;
clk_48m.enable = s5p6440_clk48m_ctrl;
clkdiv0 = __raw_readl(S5P_CLK_DIV0);
@ -610,11 +619,15 @@ void __init_or_cpufreq s5p6440_setup_clocks(void)
mpll = s5p_get_pll45xx(xtal, __raw_readl(S5P_MPLL_CON), pll_4502);
apll = s5p_get_pll45xx(xtal, __raw_readl(S5P_APLL_CON), pll_4502);
clk_fout_mpll.rate = mpll;
clk_fout_epll.rate = epll;
clk_fout_apll.rate = apll;
printk(KERN_INFO "S5P6440: PLL settings, A=%ld.%ldMHz, M=%ld.%ldMHz," \
" E=%ld.%ldMHz\n",
print_mhz(apll), print_mhz(mpll), print_mhz(epll));
fclk = apll / GET_DIV(clkdiv0, S5P_CLKDIV0_ARM);
fclk = clk_get_rate(&clk_armclk.clk);
hclk = fclk / GET_DIV(clkdiv0, S5P_CLKDIV0_HCLK);
pclk = hclk / GET_DIV(clkdiv0, S5P_CLKDIV0_PCLK);
@ -633,10 +646,6 @@ void __init_or_cpufreq s5p6440_setup_clocks(void)
print_mhz(hclk), print_mhz(hclk_low),
print_mhz(pclk), print_mhz(pclk_low));
clk_fout_mpll.rate = mpll;
clk_fout_epll.rate = epll;
clk_fout_apll.rate = apll;
clk_f.rate = fclk;
clk_h.rate = hclk;
clk_p.rate = pclk;