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ARM: S3C64XX: Use new clock-clksrc.c code for clocks. 

Move the s3c6400-clock.c implementation over to use the new common
plat-samsung based clock-clksrc.c.

Note, this does not delete the clocks definitions that are now unused
in the regs-clock.h to reduce the quantity of change in this commit.

Based on original patches by Harald Welte.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Ben Dooks 2009-12-01 01:24:35 +00:00
Родитель aa9ad6ad9c
Коммит 399cae7474
2 изменённых файлов: 40 добавлений и 202 удалений
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1
arch/arm/plat-s3c64xx/Kconfig
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@ -13,6 +13,7 @@ config PLAT_S3C64XX
select ARM_VIC
select NO_IOPORT
select ARCH_REQUIRE_GPIOLIB
select SAMSUNG_CLKSRC
select S3C_GPIO_TRACK
select S3C_GPIO_PULL_UPDOWN
select S3C_GPIO_CFG_S3C24XX

241
arch/arm/plat-s3c64xx/s3c6400-clock.c
Просмотреть файл

@ -29,6 +29,7 @@
#include <plat/regs-clock.h>
#include <plat/clock.h>
#include <plat/clock-clksrc.h>
#include <plat/cpu.h>
#include <plat/pll.h>
@ -48,22 +49,6 @@ static struct clk clk_ext_xtal_mux = {
#define clk_fout_mpll clk_mpll
#define clk_fout_epll clk_epll
struct clk_sources {
unsigned int nr_sources;
struct clk **sources;
};
struct clksrc_clk {
struct clk clk;
unsigned int mask;
unsigned int shift;
struct clk_sources *sources;
unsigned int divider_shift;
void __iomem *reg_divider;
};
static struct clk clk_fout_apll = {
.name = "fout_apll",
.id = -1,
@ -74,7 +59,7 @@ static struct clk *clk_src_apll_list[] = {
[1] = &clk_fout_apll,
};
static struct clk_sources clk_src_apll = {
static struct clksrc_sources clk_src_apll = {
.sources = clk_src_apll_list,
.nr_sources = ARRAY_SIZE(clk_src_apll_list),
};
@ -84,8 +69,7 @@ static struct clksrc_clk clk_mout_apll = {
.name = "mout_apll",
.id = -1,
},
.shift = S3C6400_CLKSRC_APLL_MOUT_SHIFT,
.mask = S3C6400_CLKSRC_APLL_MOUT,
.reg_src = { S3C_CLK_SRC, 0, 1 },
.sources = &clk_src_apll,
};
@ -94,7 +78,7 @@ static struct clk *clk_src_epll_list[] = {
[1] = &clk_fout_epll,
};
static struct clk_sources clk_src_epll = {
static struct clksrc_sources clk_src_epll = {
.sources = clk_src_epll_list,
.nr_sources = ARRAY_SIZE(clk_src_epll_list),
};
@ -104,8 +88,7 @@ static struct clksrc_clk clk_mout_epll = {
.name = "mout_epll",
.id = -1,
},
.shift = S3C6400_CLKSRC_EPLL_MOUT_SHIFT,
.mask = S3C6400_CLKSRC_EPLL_MOUT,
.reg_src = { S3C_CLK_SRC, 2, 1 },
.sources = &clk_src_epll,
};
@ -114,7 +97,7 @@ static struct clk *clk_src_mpll_list[] = {
[1] = &clk_fout_mpll,
};
static struct clk_sources clk_src_mpll = {
static struct clksrc_sources clk_src_mpll = {
.sources = clk_src_mpll_list,
.nr_sources = ARRAY_SIZE(clk_src_mpll_list),
};
@ -124,8 +107,7 @@ static struct clksrc_clk clk_mout_mpll = {
.name = "mout_mpll",
.id = -1,
},
.shift = S3C6400_CLKSRC_MPLL_MOUT_SHIFT,
.mask = S3C6400_CLKSRC_MPLL_MOUT,
.reg_src = { S3C_CLK_SRC, 1, 1 },
.sources = &clk_src_mpll,
};
@ -214,7 +196,7 @@ static struct clk *clkset_spi_mmc_list[] = {
&clk_27m,
};
static struct clk_sources clkset_spi_mmc = {
static struct clksrc_sources clkset_spi_mmc = {
.sources = clkset_spi_mmc_list,
.nr_sources = ARRAY_SIZE(clkset_spi_mmc_list),
};
@ -226,7 +208,7 @@ static struct clk *clkset_irda_list[] = {
&clk_27m,
};
static struct clk_sources clkset_irda = {
static struct clksrc_sources clkset_irda = {
.sources = clkset_irda_list,
.nr_sources = ARRAY_SIZE(clkset_irda_list),
};
@ -238,7 +220,7 @@ static struct clk *clkset_uart_list[] = {
NULL
};
static struct clk_sources clkset_uart = {
static struct clksrc_sources clkset_uart = {
.sources = clkset_uart_list,
.nr_sources = ARRAY_SIZE(clkset_uart_list),
};
@ -250,7 +232,7 @@ static struct clk *clkset_uhost_list[] = {
&clk_fin_epll,
};
static struct clk_sources clkset_uhost = {
static struct clksrc_sources clkset_uhost = {
.sources = clkset_uhost_list,
.nr_sources = ARRAY_SIZE(clkset_uhost_list),
};
@ -265,94 +247,6 @@ static struct clk_sources clkset_uhost = {
* have a common parent divisor so are not included here.
*/
static inline struct clksrc_clk *to_clksrc(struct clk *clk)
{
return container_of(clk, struct clksrc_clk, clk);
}
static unsigned long s3c64xx_getrate_clksrc(struct clk *clk)
{
struct clksrc_clk *sclk = to_clksrc(clk);
unsigned long rate = clk_get_rate(clk->parent);
u32 clkdiv = __raw_readl(sclk->reg_divider);
clkdiv >>= sclk->divider_shift;
clkdiv &= 0xf;
clkdiv++;
rate /= clkdiv;
return rate;
}
static int s3c64xx_setrate_clksrc(struct clk *clk, unsigned long rate)
{
struct clksrc_clk *sclk = to_clksrc(clk);
void __iomem *reg = sclk->reg_divider;
unsigned int div;
u32 val;
rate = clk_round_rate(clk, rate);
div = clk_get_rate(clk->parent) / rate;
if (div > 16)
return -EINVAL;
val = __raw_readl(reg);
val &= ~(0xf << sclk->divider_shift);
val |= (div - 1) << sclk->divider_shift;
__raw_writel(val, reg);
return 0;
}
static int s3c64xx_setparent_clksrc(struct clk *clk, struct clk *parent)
{
struct clksrc_clk *sclk = to_clksrc(clk);
struct clk_sources *srcs = sclk->sources;
u32 clksrc = __raw_readl(S3C_CLK_SRC);
int src_nr = -1;
int ptr;
for (ptr = 0; ptr < srcs->nr_sources; ptr++)
if (srcs->sources[ptr] == parent) {
src_nr = ptr;
break;
}
if (src_nr >= 0) {
clksrc &= ~sclk->mask;
clksrc |= src_nr << sclk->shift;
__raw_writel(clksrc, S3C_CLK_SRC);
clk->parent = parent;
return 0;
}
return -EINVAL;
}
static unsigned long s3c64xx_roundrate_clksrc(struct clk *clk,
unsigned long rate)
{
unsigned long parent_rate = clk_get_rate(clk->parent);
int div;
if (rate > parent_rate)
rate = parent_rate;
else {
div = parent_rate / rate;
if (div == 0)
div = 1;
if (div > 16)
div = 16;
rate = parent_rate / div;
}
return rate;
}
/* clocks that feed other parts of the clock source tree */
static struct clk clk_iis_cd0 = {
@ -378,7 +272,7 @@ static struct clk *clkset_audio0_list[] = {
[4] = &clk_pcm_cd,
};
static struct clk_sources clkset_audio0 = {
static struct clksrc_sources clkset_audio0 = {
.sources = clkset_audio0_list,
.nr_sources = ARRAY_SIZE(clkset_audio0_list),
};
@ -391,7 +285,7 @@ static struct clk *clkset_audio1_list[] = {
[4] = &clk_pcm_cd,
};
static struct clk_sources clkset_audio1 = {
static struct clksrc_sources clkset_audio1 = {
.sources = clkset_audio1_list,
.nr_sources = ARRAY_SIZE(clkset_audio1_list),
};
@ -400,7 +294,7 @@ static struct clk *clkset_camif_list[] = {
&clk_h2,
};
static struct clk_sources clkset_camif = {
static struct clksrc_sources clkset_camif = {
.sources = clkset_camif_list,
.nr_sources = ARRAY_SIZE(clkset_camif_list),
};
@ -413,11 +307,9 @@ static struct clksrc_clk clksrcs[] = {
.ctrlbit = S3C_CLKCON_SCLK_MMC0,
.enable = s3c64xx_sclk_ctrl,
},
.shift = S3C6400_CLKSRC_MMC0_SHIFT,
.mask = S3C6400_CLKSRC_MMC0_MASK,
.reg_src = { S3C_CLK_SRC, 18, 2 },
.reg_div = { S3C_CLK_DIV1, 0, 4 },
.sources = &clkset_spi_mmc,
.divider_shift = S3C6400_CLKDIV1_MMC0_SHIFT,
.reg_divider = S3C_CLK_DIV1,
}, {
.clk = {
.name = "mmc_bus",
@ -425,11 +317,9 @@ static struct clksrc_clk clksrcs[] = {
.ctrlbit = S3C_CLKCON_SCLK_MMC1,
.enable = s3c64xx_sclk_ctrl,
},
.shift = S3C6400_CLKSRC_MMC1_SHIFT,
.mask = S3C6400_CLKSRC_MMC1_MASK,
.reg_src = { S3C_CLK_SRC, 20, 2 },
.reg_div = { S3C_CLK_DIV1, 4, 4 },
.sources = &clkset_spi_mmc,
.divider_shift = S3C6400_CLKDIV1_MMC1_SHIFT,
.reg_divider = S3C_CLK_DIV1,
}, {
.clk = {
.name = "mmc_bus",
@ -437,11 +327,9 @@ static struct clksrc_clk clksrcs[] = {
.ctrlbit = S3C_CLKCON_SCLK_MMC2,
.enable = s3c64xx_sclk_ctrl,
},
.shift = S3C6400_CLKSRC_MMC2_SHIFT,
.mask = S3C6400_CLKSRC_MMC2_MASK,
.reg_src = { S3C_CLK_SRC, 22, 2 },
.reg_div = { S3C_CLK_DIV1, 8, 4 },
.sources = &clkset_spi_mmc,
.divider_shift = S3C6400_CLKDIV1_MMC2_SHIFT,
.reg_divider = S3C_CLK_DIV1,
}, {
.clk = {
.name = "usb-bus-host",
@ -449,11 +337,9 @@ static struct clksrc_clk clksrcs[] = {
.ctrlbit = S3C_CLKCON_SCLK_UHOST,
.enable = s3c64xx_sclk_ctrl,
},
.shift = S3C6400_CLKSRC_UHOST_SHIFT,
.mask = S3C6400_CLKSRC_UHOST_MASK,
.reg_src = { S3C_CLK_SRC, 5, 2 },
.reg_div = { S3C_CLK_DIV1, 20, 4 },
.sources = &clkset_uhost,
.divider_shift = S3C6400_CLKDIV1_UHOST_SHIFT,
.reg_divider = S3C_CLK_DIV1,
}, {
.clk = {
.name = "uclk1",
@ -461,11 +347,9 @@ static struct clksrc_clk clksrcs[] = {
.ctrlbit = S3C_CLKCON_SCLK_UART,
.enable = s3c64xx_sclk_ctrl,
},
.shift = S3C6400_CLKSRC_UART_SHIFT,
.mask = S3C6400_CLKSRC_UART_MASK,
.reg_src = { S3C_CLK_SRC, 13, 1 },
.reg_div = { S3C_CLK_DIV2, 16, 4 },
.sources = &clkset_uart,
.divider_shift = S3C6400_CLKDIV2_UART_SHIFT,
.reg_divider = S3C_CLK_DIV2,
}, {
/* Where does UCLK0 come from? */
.clk = {
@ -474,11 +358,9 @@ static struct clksrc_clk clksrcs[] = {
.ctrlbit = S3C_CLKCON_SCLK_SPI0,
.enable = s3c64xx_sclk_ctrl,
},
.shift = S3C6400_CLKSRC_SPI0_SHIFT,
.mask = S3C6400_CLKSRC_SPI0_MASK,
.reg_src = { S3C_CLK_SRC, 14, 2 },
.reg_div = { S3C_CLK_DIV2, 0, 4 },
.sources = &clkset_spi_mmc,
.divider_shift = S3C6400_CLKDIV2_SPI0_SHIFT,
.reg_divider = S3C_CLK_DIV2,
}, {
.clk = {
.name = "spi-bus",
@ -486,11 +368,9 @@ static struct clksrc_clk clksrcs[] = {
.ctrlbit = S3C_CLKCON_SCLK_SPI1,
.enable = s3c64xx_sclk_ctrl,
},
.shift = S3C6400_CLKSRC_SPI1_SHIFT,
.mask = S3C6400_CLKSRC_SPI1_MASK,
.reg_src = { S3C_CLK_SRC, 16, 2 },
.reg_div = { S3C_CLK_DIV2, 4, 4 },
.sources = &clkset_spi_mmc,
.divider_shift = S3C6400_CLKDIV2_SPI1_SHIFT,
.reg_divider = S3C_CLK_DIV2,
}, {
.clk = {
.name = "audio-bus",
@ -498,11 +378,9 @@ static struct clksrc_clk clksrcs[] = {
.ctrlbit = S3C_CLKCON_SCLK_AUDIO0,
.enable = s3c64xx_sclk_ctrl,
},
.shift = S3C6400_CLKSRC_AUDIO0_SHIFT,
.mask = S3C6400_CLKSRC_AUDIO0_MASK,
.reg_src = { S3C_CLK_SRC, 7, 3 },
.reg_div = { S3C_CLK_DIV2, 8, 4 },
.sources = &clkset_audio0,
.divider_shift = S3C6400_CLKDIV2_AUDIO0_SHIFT,
.reg_divider = S3C_CLK_DIV2,
}, {
.clk = {
.name = "audio-bus",
@ -510,11 +388,9 @@ static struct clksrc_clk clksrcs[] = {
.ctrlbit = S3C_CLKCON_SCLK_AUDIO1,
.enable = s3c64xx_sclk_ctrl,
},
.shift = S3C6400_CLKSRC_AUDIO1_SHIFT,
.mask = S3C6400_CLKSRC_AUDIO1_MASK,
.reg_src = { S3C_CLK_SRC, 10, 3 },
.reg_div = { S3C_CLK_DIV2, 12, 4 },
.sources = &clkset_audio1,
.divider_shift = S3C6400_CLKDIV2_AUDIO1_SHIFT,
.reg_divider = S3C_CLK_DIV2,
}, {
.clk = {
.name = "irda-bus",
@ -522,11 +398,9 @@ static struct clksrc_clk clksrcs[] = {
.ctrlbit = S3C_CLKCON_SCLK_IRDA,
.enable = s3c64xx_sclk_ctrl,
},
.shift = S3C6400_CLKSRC_IRDA_SHIFT,
.mask = S3C6400_CLKSRC_IRDA_MASK,
.reg_src = { S3C_CLK_SRC, 24, 2 },
.reg_div = { S3C_CLK_DIV2, 20, 4 },
.sources = &clkset_irda,
.divider_shift = S3C6400_CLKDIV2_IRDA_SHIFT,
.reg_divider = S3C_CLK_DIV2,
}, {
.clk = {
.name = "camera",
@ -534,11 +408,9 @@ static struct clksrc_clk clksrcs[] = {
.ctrlbit = S3C_CLKCON_SCLK_CAM,
.enable = s3c64xx_sclk_ctrl,
},
.shift = 0,
.mask = 0,
.reg_div = { S3C_CLK_DIV0, 20, 4 },
.reg_src = { NULL, 0, 0 },
.sources = &clkset_camif,
.divider_shift = S3C6400_CLKDIV0_CAM_SHIFT,
.reg_divider = S3C_CLK_DIV0,
},
};
@ -550,27 +422,6 @@ static struct clksrc_clk *init_parents[] = {
&clk_mout_mpll,
};
static void __init_or_cpufreq s3c6400_set_clksrc(struct clksrc_clk *clk)
{
struct clk_sources *srcs = clk->sources;
u32 clksrc = __raw_readl(S3C_CLK_SRC);
clksrc &= clk->mask;
clksrc >>= clk->shift;
if (clksrc > srcs->nr_sources || !srcs->sources[clksrc]) {
printk(KERN_ERR "%s: bad source %d\n",
clk->clk.name, clksrc);
return;
}
clk->clk.parent = srcs->sources[clksrc];
printk(KERN_INFO "%s: source is %s (%d), rate is %ld\n",
clk->clk.name, clk->clk.parent->name, clksrc,
clk_get_rate(&clk->clk));
}
#define GET_DIV(clk, field) ((((clk) & field##_MASK) >> field##_SHIFT) + 1)
void __init_or_cpufreq s3c6400_setup_clocks(void)
@ -629,10 +480,10 @@ void __init_or_cpufreq s3c6400_setup_clocks(void)
clk_f.rate = fclk;
for (ptr = 0; ptr < ARRAY_SIZE(init_parents); ptr++)
s3c6400_set_clksrc(init_parents[ptr]);
s3c_set_clksrc(init_parents[ptr]);
for (ptr = 0; ptr < ARRAY_SIZE(clksrcs); ptr++)
s3c6400_set_clksrc(&clksrcs[ptr]);
s3c_set_clksrc(&clksrcs[ptr]);
}
static struct clk *clks[] __initdata = {
@ -675,19 +526,5 @@ void __init s3c6400_register_clocks(unsigned armclk_divlimit)
}
}
for (ptr = 0; ptr < ARRAY_SIZE(clksrcs); ptr++) {
clkp = &clksrcs[ptr].clk;
/* all clksrc clocks have these */
clkp->get_rate = s3c64xx_getrate_clksrc;
clkp->set_rate = s3c64xx_setrate_clksrc;
clkp->set_parent = s3c64xx_setparent_clksrc;
clkp->round_rate = s3c64xx_roundrate_clksrc;
ret = s3c24xx_register_clock(clkp);
if (ret < 0) {
printk(KERN_ERR "Failed to register clock %s (%d)\n",
clkp->name, ret);
}
}
s3c_register_clksrc(clksrcs, ARRAY_SIZE(clksrcs));
}