ARM: S3C2443: Move parts of the clock code to common clock file
To share code with some of the newer parts such as the S3C2416, move parts of arch/arm/mach-s3c2443/clock.c to a common file called arch/arm/plat-s3c24xx/s3c2443-clock.c. Update the build configuration to deal with this new file. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Ben Dooks
parent
d11a7d7100
commit
af337f3e63
|
|
@ -8,6 +8,7 @@ config CPU_S3C2443
|
|||
select S3C2443_DMA if S3C2410_DMA
|
||||
select CPU_LLSERIAL_S3C2440
|
||||
select SAMSUNG_CLKSRC
|
||||
select S3C2443_CLOCK
|
||||
help
|
||||
Support for the S3C2443 SoC from the S3C24XX line
|
||||
|
||||
|
|
|
|||
|
|
@ -21,6 +21,7 @@
|
|||
*/
|
||||
|
||||
#include <linux/init.h>
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/list.h>
|
||||
|
|
@ -54,111 +55,13 @@
|
|||
* set the correct muxing at initialisation
|
||||
*/
|
||||
|
||||
static int s3c2443_gate(void __iomem *reg, struct clk *clk, int enable)
|
||||
{
|
||||
u32 ctrlbit = clk->ctrlbit;
|
||||
u32 con = __raw_readl(reg);
|
||||
|
||||
if (enable)
|
||||
con |= ctrlbit;
|
||||
else
|
||||
con &= ~ctrlbit;
|
||||
|
||||
__raw_writel(con, reg);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int s3c2443_clkcon_enable_h(struct clk *clk, int enable)
|
||||
{
|
||||
return s3c2443_gate(S3C2443_HCLKCON, clk, enable);
|
||||
}
|
||||
|
||||
static int s3c2443_clkcon_enable_p(struct clk *clk, int enable)
|
||||
{
|
||||
return s3c2443_gate(S3C2443_PCLKCON, clk, enable);
|
||||
}
|
||||
|
||||
static int s3c2443_clkcon_enable_s(struct clk *clk, int enable)
|
||||
{
|
||||
return s3c2443_gate(S3C2443_SCLKCON, clk, enable);
|
||||
}
|
||||
|
||||
/* clock selections */
|
||||
|
||||
/* mpllref is a direct descendant of clk_xtal by default, but it is not
|
||||
* elided as the EPLL can be either sourced by the XTAL or EXTCLK and as
|
||||
* such directly equating the two source clocks is impossible.
|
||||
*/
|
||||
static struct clk clk_mpllref = {
|
||||
.name = "mpllref",
|
||||
.parent = &clk_xtal,
|
||||
.id = -1,
|
||||
};
|
||||
|
||||
static struct clk clk_i2s_ext = {
|
||||
.name = "i2s-ext",
|
||||
.id = -1,
|
||||
};
|
||||
|
||||
static struct clk *clk_epllref_sources[] = {
|
||||
[0] = &clk_mpllref,
|
||||
[1] = &clk_mpllref,
|
||||
[2] = &clk_xtal,
|
||||
[3] = &clk_ext,
|
||||
};
|
||||
|
||||
static struct clksrc_clk clk_epllref = {
|
||||
.clk = {
|
||||
.name = "epllref",
|
||||
.id = -1,
|
||||
},
|
||||
.sources = &(struct clksrc_sources) {
|
||||
.sources = clk_epllref_sources,
|
||||
.nr_sources = ARRAY_SIZE(clk_epllref_sources),
|
||||
},
|
||||
.reg_src = { .reg = S3C2443_CLKSRC, .size = 2, .shift = 7 },
|
||||
};
|
||||
|
||||
static unsigned long s3c2443_getrate_mdivclk(struct clk *clk)
|
||||
{
|
||||
unsigned long parent_rate = clk_get_rate(clk->parent);
|
||||
unsigned long div = __raw_readl(S3C2443_CLKDIV0);
|
||||
|
||||
div &= S3C2443_CLKDIV0_EXTDIV_MASK;
|
||||
div >>= (S3C2443_CLKDIV0_EXTDIV_SHIFT-1); /* x2 */
|
||||
|
||||
return parent_rate / (div + 1);
|
||||
}
|
||||
|
||||
static struct clk clk_mdivclk = {
|
||||
.name = "mdivclk",
|
||||
.parent = &clk_mpllref,
|
||||
.id = -1,
|
||||
.ops = &(struct clk_ops) {
|
||||
.get_rate = s3c2443_getrate_mdivclk,
|
||||
},
|
||||
};
|
||||
|
||||
static struct clk *clk_msysclk_sources[] = {
|
||||
[0] = &clk_mpllref,
|
||||
[1] = &clk_mpll,
|
||||
[2] = &clk_mdivclk,
|
||||
[3] = &clk_mpllref,
|
||||
};
|
||||
|
||||
static struct clksrc_clk clk_msysclk = {
|
||||
.clk = {
|
||||
.name = "msysclk",
|
||||
.parent = &clk_xtal,
|
||||
.id = -1,
|
||||
},
|
||||
.sources = &(struct clksrc_sources) {
|
||||
.sources = clk_msysclk_sources,
|
||||
.nr_sources = ARRAY_SIZE(clk_msysclk_sources),
|
||||
},
|
||||
.reg_src = { .reg = S3C2443_CLKSRC, .size = 2, .shift = 3 },
|
||||
};
|
||||
|
||||
/* armdiv
|
||||
*
|
||||
* this clock is sourced from msysclk and can have a number of
|
||||
|
|
@ -266,44 +169,6 @@ static struct clksrc_clk clk_arm = {
|
|||
.reg_src = { .reg = S3C2443_CLKDIV0, .size = 1, .shift = 13 },
|
||||
};
|
||||
|
||||
/* esysclk
|
||||
*
|
||||
* this is sourced from either the EPLL or the EPLLref clock
|
||||
*/
|
||||
|
||||
static struct clk *clk_sysclk_sources[] = {
|
||||
[0] = &clk_epllref.clk,
|
||||
[1] = &clk_epll,
|
||||
};
|
||||
|
||||
static struct clksrc_clk clk_esysclk = {
|
||||
.clk = {
|
||||
.name = "esysclk",
|
||||
.parent = &clk_epll,
|
||||
.id = -1,
|
||||
},
|
||||
.sources = &(struct clksrc_sources) {
|
||||
.sources = clk_sysclk_sources,
|
||||
.nr_sources = ARRAY_SIZE(clk_sysclk_sources),
|
||||
},
|
||||
.reg_src = { .reg = S3C2443_CLKSRC, .size = 1, .shift = 6 },
|
||||
};
|
||||
|
||||
/* uartclk
|
||||
*
|
||||
* UART baud-rate clock sourced from esysclk via a divisor
|
||||
*/
|
||||
|
||||
static struct clksrc_clk clk_uart = {
|
||||
.clk = {
|
||||
.name = "uartclk",
|
||||
.id = -1,
|
||||
.parent = &clk_esysclk.clk,
|
||||
},
|
||||
.reg_div = { .reg = S3C2443_CLKDIV1, .size = 4, .shift = 8 },
|
||||
};
|
||||
|
||||
|
||||
/* hsspi
|
||||
*
|
||||
* high-speed spi clock, sourced from esysclk
|
||||
|
|
@ -320,21 +185,6 @@ static struct clksrc_clk clk_hsspi = {
|
|||
.reg_div = { .reg = S3C2443_CLKDIV1, .size = 2, .shift = 4 },
|
||||
};
|
||||
|
||||
/* usbhost
|
||||
*
|
||||
* usb host bus-clock, usually 48MHz to provide USB bus clock timing
|
||||
*/
|
||||
|
||||
static struct clksrc_clk clk_usb_bus_host = {
|
||||
.clk = {
|
||||
.name = "usb-bus-host-parent",
|
||||
.id = -1,
|
||||
.parent = &clk_esysclk.clk,
|
||||
.ctrlbit = S3C2443_SCLKCON_USBHOST,
|
||||
.enable = s3c2443_clkcon_enable_s,
|
||||
},
|
||||
.reg_div = { .reg = S3C2443_CLKDIV1, .size = 2, .shift = 4 },
|
||||
};
|
||||
|
||||
/* clk_hsmcc_div
|
||||
*
|
||||
|
|
@ -433,88 +283,15 @@ static struct clksrc_clk clk_i2s = {
|
|||
.reg_src = { .reg = S3C2443_CLKSRC, .size = 2, .shift = 14 },
|
||||
};
|
||||
|
||||
/* cam-if
|
||||
*
|
||||
* camera interface bus-clock, divided down from esysclk
|
||||
*/
|
||||
|
||||
static struct clksrc_clk clk_cam = {
|
||||
.clk = {
|
||||
.name = "camif-upll", /* same as 2440 name */
|
||||
.id = -1,
|
||||
.parent = &clk_esysclk.clk,
|
||||
.ctrlbit = S3C2443_SCLKCON_CAMCLK,
|
||||
.enable = s3c2443_clkcon_enable_s,
|
||||
},
|
||||
.reg_div = { .reg = S3C2443_CLKDIV1, .size = 4, .shift = 26 },
|
||||
};
|
||||
|
||||
/* display-if
|
||||
*
|
||||
* display interface clock, divided from esysclk
|
||||
*/
|
||||
|
||||
static struct clksrc_clk clk_display = {
|
||||
.clk = {
|
||||
.name = "display-if",
|
||||
.id = -1,
|
||||
.parent = &clk_esysclk.clk,
|
||||
.ctrlbit = S3C2443_SCLKCON_DISPCLK,
|
||||
.enable = s3c2443_clkcon_enable_s,
|
||||
},
|
||||
.reg_div = { .reg = S3C2443_CLKDIV1, .size = 8, .shift = 16 },
|
||||
};
|
||||
|
||||
/* prediv
|
||||
*
|
||||
* this divides the msysclk down to pass to h/p/etc.
|
||||
*/
|
||||
|
||||
static unsigned long s3c2443_prediv_getrate(struct clk *clk)
|
||||
{
|
||||
unsigned long rate = clk_get_rate(clk->parent);
|
||||
unsigned long clkdiv0 = __raw_readl(S3C2443_CLKDIV0);
|
||||
|
||||
clkdiv0 &= S3C2443_CLKDIV0_PREDIV_MASK;
|
||||
clkdiv0 >>= S3C2443_CLKDIV0_PREDIV_SHIFT;
|
||||
|
||||
return rate / (clkdiv0 + 1);
|
||||
}
|
||||
|
||||
static struct clk clk_prediv = {
|
||||
.name = "prediv",
|
||||
.id = -1,
|
||||
.parent = &clk_msysclk.clk,
|
||||
.ops = &(struct clk_ops) {
|
||||
.get_rate = s3c2443_prediv_getrate,
|
||||
},
|
||||
};
|
||||
|
||||
/* standard clock definitions */
|
||||
|
||||
static struct clk init_clocks_off[] = {
|
||||
{
|
||||
.name = "nand",
|
||||
.id = -1,
|
||||
.parent = &clk_h,
|
||||
}, {
|
||||
.name = "sdi",
|
||||
.id = -1,
|
||||
.parent = &clk_p,
|
||||
.enable = s3c2443_clkcon_enable_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_SDI,
|
||||
}, {
|
||||
.name = "adc",
|
||||
.id = -1,
|
||||
.parent = &clk_p,
|
||||
.enable = s3c2443_clkcon_enable_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_ADC,
|
||||
}, {
|
||||
.name = "i2c",
|
||||
.id = -1,
|
||||
.parent = &clk_p,
|
||||
.enable = s3c2443_clkcon_enable_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_IIC,
|
||||
}, {
|
||||
.name = "iis",
|
||||
.id = -1,
|
||||
|
|
@ -537,179 +314,12 @@ static struct clk init_clocks_off[] = {
|
|||
};
|
||||
|
||||
static struct clk init_clocks[] = {
|
||||
{
|
||||
.name = "dma",
|
||||
.id = 0,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_DMA0,
|
||||
}, {
|
||||
.name = "dma",
|
||||
.id = 1,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_DMA1,
|
||||
}, {
|
||||
.name = "dma",
|
||||
.id = 2,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_DMA2,
|
||||
}, {
|
||||
.name = "dma",
|
||||
.id = 3,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_DMA3,
|
||||
}, {
|
||||
.name = "dma",
|
||||
.id = 4,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_DMA4,
|
||||
}, {
|
||||
.name = "dma",
|
||||
.id = 5,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_DMA5,
|
||||
}, {
|
||||
.name = "lcd",
|
||||
.id = -1,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_LCDC,
|
||||
}, {
|
||||
.name = "gpio",
|
||||
.id = -1,
|
||||
.parent = &clk_p,
|
||||
.enable = s3c2443_clkcon_enable_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_GPIO,
|
||||
}, {
|
||||
.name = "usb-host",
|
||||
.id = -1,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_USBH,
|
||||
}, {
|
||||
.name = "usb-device",
|
||||
.id = -1,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_USBD,
|
||||
}, {
|
||||
.name = "hsmmc",
|
||||
.id = -1,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_HSMMC,
|
||||
}, {
|
||||
.name = "cfc",
|
||||
.id = -1,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_CFC,
|
||||
}, {
|
||||
.name = "ssmc",
|
||||
.id = -1,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_SSMC,
|
||||
}, {
|
||||
.name = "timers",
|
||||
.id = -1,
|
||||
.parent = &clk_p,
|
||||
.enable = s3c2443_clkcon_enable_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_PWMT,
|
||||
}, {
|
||||
.name = "uart",
|
||||
.id = 0,
|
||||
.parent = &clk_p,
|
||||
.enable = s3c2443_clkcon_enable_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_UART0,
|
||||
}, {
|
||||
.name = "uart",
|
||||
.id = 1,
|
||||
.parent = &clk_p,
|
||||
.enable = s3c2443_clkcon_enable_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_UART1,
|
||||
}, {
|
||||
.name = "uart",
|
||||
.id = 2,
|
||||
.parent = &clk_p,
|
||||
.enable = s3c2443_clkcon_enable_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_UART2,
|
||||
}, {
|
||||
.name = "uart",
|
||||
.id = 3,
|
||||
.parent = &clk_p,
|
||||
.enable = s3c2443_clkcon_enable_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_UART3,
|
||||
}, {
|
||||
.name = "rtc",
|
||||
.id = -1,
|
||||
.parent = &clk_p,
|
||||
.enable = s3c2443_clkcon_enable_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_RTC,
|
||||
}, {
|
||||
.name = "watchdog",
|
||||
.id = -1,
|
||||
.parent = &clk_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_WDT,
|
||||
}, {
|
||||
.name = "usb-bus-host",
|
||||
.id = -1,
|
||||
.parent = &clk_usb_bus_host.clk,
|
||||
}, {
|
||||
.name = "ac97",
|
||||
.id = -1,
|
||||
.parent = &clk_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_AC97,
|
||||
}
|
||||
};
|
||||
|
||||
/* clocks to add where we need to check their parentage */
|
||||
|
||||
static struct clksrc_clk __initdata *init_list[] = {
|
||||
&clk_epllref, /* should be first */
|
||||
&clk_esysclk,
|
||||
&clk_msysclk,
|
||||
&clk_arm,
|
||||
&clk_i2s_eplldiv,
|
||||
&clk_i2s,
|
||||
&clk_cam,
|
||||
&clk_uart,
|
||||
&clk_display,
|
||||
&clk_hsmmc_div,
|
||||
&clk_usb_bus_host,
|
||||
};
|
||||
|
||||
static void __init s3c2443_clk_initparents(void)
|
||||
{
|
||||
int ptr;
|
||||
|
||||
for (ptr = 0; ptr < ARRAY_SIZE(init_list); ptr++)
|
||||
s3c_set_clksrc(init_list[ptr], true);
|
||||
}
|
||||
|
||||
static inline unsigned long s3c2443_get_hdiv(unsigned long clkcon0)
|
||||
{
|
||||
clkcon0 &= S3C2443_CLKDIV0_HCLKDIV_MASK;
|
||||
|
||||
return clkcon0 + 1;
|
||||
}
|
||||
|
||||
/* clocks to add straight away */
|
||||
|
||||
static struct clksrc_clk *clksrcs[] __initdata = {
|
||||
&clk_usb_bus_host,
|
||||
&clk_epllref,
|
||||
&clk_esysclk,
|
||||
&clk_msysclk,
|
||||
&clk_arm,
|
||||
&clk_uart,
|
||||
&clk_display,
|
||||
&clk_cam,
|
||||
&clk_i2s_eplldiv,
|
||||
&clk_i2s,
|
||||
&clk_hsspi,
|
||||
|
|
@ -717,46 +327,13 @@ static struct clksrc_clk *clksrcs[] __initdata = {
|
|||
};
|
||||
|
||||
static struct clk *clks[] __initdata = {
|
||||
&clk_ext,
|
||||
&clk_epll,
|
||||
&clk_usb_bus,
|
||||
&clk_mpllref,
|
||||
&clk_hsmmc,
|
||||
&clk_armdiv,
|
||||
&clk_prediv,
|
||||
};
|
||||
|
||||
void __init_or_cpufreq s3c2443_setup_clocks(void)
|
||||
{
|
||||
unsigned long mpllcon = __raw_readl(S3C2443_MPLLCON);
|
||||
unsigned long clkdiv0 = __raw_readl(S3C2443_CLKDIV0);
|
||||
struct clk *xtal_clk;
|
||||
unsigned long xtal;
|
||||
unsigned long pll;
|
||||
unsigned long fclk;
|
||||
unsigned long hclk;
|
||||
unsigned long pclk;
|
||||
|
||||
xtal_clk = clk_get(NULL, "xtal");
|
||||
xtal = clk_get_rate(xtal_clk);
|
||||
clk_put(xtal_clk);
|
||||
|
||||
pll = s3c2443_get_mpll(mpllcon, xtal);
|
||||
clk_msysclk.clk.rate = pll;
|
||||
|
||||
fclk = pll / s3c2443_fclk_div(clkdiv0);
|
||||
hclk = s3c2443_prediv_getrate(&clk_prediv);
|
||||
hclk /= s3c2443_get_hdiv(clkdiv0);
|
||||
pclk = hclk / ((clkdiv0 & S3C2443_CLKDIV0_HALF_PCLK) ? 2 : 1);
|
||||
|
||||
s3c24xx_setup_clocks(fclk, hclk, pclk);
|
||||
|
||||
printk("S3C2443: mpll %s %ld.%03ld MHz, cpu %ld.%03ld MHz, mem %ld.%03ld MHz, pclk %ld.%03ld MHz\n",
|
||||
(mpllcon & S3C2443_PLLCON_OFF) ? "off":"on",
|
||||
print_mhz(pll), print_mhz(fclk),
|
||||
print_mhz(hclk), print_mhz(pclk));
|
||||
|
||||
s3c24xx_setup_clocks(fclk, hclk, pclk);
|
||||
s3c2443_common_setup_clocks(s3c2443_get_mpll, s3c2443_fclk_div);
|
||||
}
|
||||
|
||||
void __init s3c2443_init_clocks(int xtal)
|
||||
|
|
@ -764,35 +341,18 @@ void __init s3c2443_init_clocks(int xtal)
|
|||
unsigned long epllcon = __raw_readl(S3C2443_EPLLCON);
|
||||
int ptr;
|
||||
|
||||
/* s3c2443 parents h and p clocks from prediv */
|
||||
clk_h.parent = &clk_prediv;
|
||||
clk_p.parent = &clk_prediv;
|
||||
clk_epll.rate = s3c2443_get_epll(epllcon, xtal);
|
||||
clk_epll.parent = &clk_epllref.clk;
|
||||
|
||||
s3c2443_common_init_clocks(xtal, s3c2443_get_mpll, s3c2443_fclk_div);
|
||||
|
||||
s3c24xx_register_baseclocks(xtal);
|
||||
s3c2443_setup_clocks();
|
||||
s3c2443_clk_initparents();
|
||||
|
||||
s3c24xx_register_clocks(clks, ARRAY_SIZE(clks));
|
||||
|
||||
for (ptr = 0; ptr < ARRAY_SIZE(clksrcs); ptr++)
|
||||
s3c_register_clksrc(clksrcs[ptr], 1);
|
||||
|
||||
clk_epll.rate = s3c2443_get_epll(epllcon, xtal);
|
||||
clk_epll.parent = &clk_epllref.clk;
|
||||
clk_usb_bus.parent = &clk_usb_bus_host.clk;
|
||||
|
||||
/* ensure usb bus clock is within correct rate of 48MHz */
|
||||
|
||||
if (clk_get_rate(&clk_usb_bus_host.clk) != (48 * 1000 * 1000)) {
|
||||
printk(KERN_INFO "Warning: USB host bus not at 48MHz\n");
|
||||
clk_set_rate(&clk_usb_bus_host.clk, 48*1000*1000);
|
||||
}
|
||||
|
||||
printk("S3C2443: epll %s %ld.%03ld MHz, usb-bus %ld.%03ld MHz\n",
|
||||
(epllcon & S3C2443_PLLCON_OFF) ? "off":"on",
|
||||
print_mhz(clk_get_rate(&clk_epll)),
|
||||
print_mhz(clk_get_rate(&clk_usb_bus)));
|
||||
|
||||
/* register clocks from clock array */
|
||||
|
||||
s3c_register_clocks(init_clocks, ARRAY_SIZE(init_clocks));
|
||||
|
|
|
|||
|
|
@ -45,6 +45,12 @@ config S3C2410_CLOCK
|
|||
Clock code for the S3C2410, and similar processors which
|
||||
is currently includes the S3C2410, S3C2440, S3C2442.
|
||||
|
||||
config S3C2443_CLOCK
|
||||
bool
|
||||
help
|
||||
Clock code for the S3C2443 and similar processors, which includes
|
||||
the S3C2416 and S3C2450.
|
||||
|
||||
config S3C24XX_DCLK
|
||||
bool
|
||||
help
|
||||
|
|
|
|||
|
|
@ -30,6 +30,7 @@ obj-$(CONFIG_PM) += pm.o
|
|||
obj-$(CONFIG_PM) += irq-pm.o
|
||||
obj-$(CONFIG_PM) += sleep.o
|
||||
obj-$(CONFIG_S3C2410_CLOCK) += s3c2410-clock.o
|
||||
obj-$(CONFIG_S3C2443_CLOCK) += s3c2443-clock.o
|
||||
obj-$(CONFIG_S3C2410_DMA) += dma.o
|
||||
obj-$(CONFIG_S3C2410_IOTIMING) += s3c2410-iotiming.o
|
||||
obj-$(CONFIG_S3C2412_IOTIMING) += s3c2412-iotiming.o
|
||||
|
|
|
|||
|
|
@ -30,3 +30,22 @@ extern int s3c2443_baseclk_add(void);
|
|||
#define s3c2443_map_io NULL
|
||||
#define s3c2443_init NULL
|
||||
#endif
|
||||
|
||||
/* common code used by s3c2443 and others.
|
||||
* note, not to be used outside of arch/arm/mach-s3c* */
|
||||
|
||||
struct clk; /* some files don't need clk.h otherwise */
|
||||
|
||||
typedef unsigned int (*pll_fn)(unsigned int reg, unsigned int base);
|
||||
typedef unsigned int (*fdiv_fn)(unsigned long clkcon0);
|
||||
|
||||
extern void s3c2443_common_setup_clocks(pll_fn get_mpll, fdiv_fn fdiv);
|
||||
extern void s3c2443_common_init_clocks(int xtal, pll_fn get_mpll, fdiv_fn fdiv);
|
||||
|
||||
extern int s3c2443_clkcon_enable_h(struct clk *clk, int enable);
|
||||
extern int s3c2443_clkcon_enable_p(struct clk *clk, int enable);
|
||||
extern int s3c2443_clkcon_enable_s(struct clk *clk, int enable);
|
||||
|
||||
extern struct clksrc_clk clk_epllref;
|
||||
extern struct clksrc_clk clk_esysclk;
|
||||
extern struct clksrc_clk clk_msysclk;
|
||||
|
|
|
|||
|
|
@ -0,0 +1,472 @@
|
|||
/* linux/arch/arm/plat-s3c24xx/s3c2443-clock.c
|
||||
*
|
||||
* Copyright (c) 2007, 2010 Simtec Electronics
|
||||
* Ben Dooks <ben@simtec.co.uk>
|
||||
*
|
||||
* S3C2443 Clock control suport - common code
|
||||
*/
|
||||
|
||||
#include <linux/init.h>
|
||||
#include <linux/clk.h>
|
||||
#include <linux/io.h>
|
||||
|
||||
#include <mach/regs-s3c2443-clock.h>
|
||||
|
||||
#include <plat/s3c2443.h>
|
||||
#include <plat/clock.h>
|
||||
#include <plat/clock-clksrc.h>
|
||||
#include <plat/cpu.h>
|
||||
|
||||
#include <plat/cpu-freq.h>
|
||||
|
||||
|
||||
static int s3c2443_gate(void __iomem *reg, struct clk *clk, int enable)
|
||||
{
|
||||
u32 ctrlbit = clk->ctrlbit;
|
||||
u32 con = __raw_readl(reg);
|
||||
|
||||
if (enable)
|
||||
con |= ctrlbit;
|
||||
else
|
||||
con &= ~ctrlbit;
|
||||
|
||||
__raw_writel(con, reg);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int s3c2443_clkcon_enable_h(struct clk *clk, int enable)
|
||||
{
|
||||
return s3c2443_gate(S3C2443_HCLKCON, clk, enable);
|
||||
}
|
||||
|
||||
int s3c2443_clkcon_enable_p(struct clk *clk, int enable)
|
||||
{
|
||||
return s3c2443_gate(S3C2443_PCLKCON, clk, enable);
|
||||
}
|
||||
|
||||
int s3c2443_clkcon_enable_s(struct clk *clk, int enable)
|
||||
{
|
||||
return s3c2443_gate(S3C2443_SCLKCON, clk, enable);
|
||||
}
|
||||
|
||||
/* mpllref is a direct descendant of clk_xtal by default, but it is not
|
||||
* elided as the EPLL can be either sourced by the XTAL or EXTCLK and as
|
||||
* such directly equating the two source clocks is impossible.
|
||||
*/
|
||||
struct clk clk_mpllref = {
|
||||
.name = "mpllref",
|
||||
.parent = &clk_xtal,
|
||||
.id = -1,
|
||||
};
|
||||
|
||||
static struct clk *clk_epllref_sources[] = {
|
||||
[0] = &clk_mpllref,
|
||||
[1] = &clk_mpllref,
|
||||
[2] = &clk_xtal,
|
||||
[3] = &clk_ext,
|
||||
};
|
||||
|
||||
struct clksrc_clk clk_epllref = {
|
||||
.clk = {
|
||||
.name = "epllref",
|
||||
.id = -1,
|
||||
},
|
||||
.sources = &(struct clksrc_sources) {
|
||||
.sources = clk_epllref_sources,
|
||||
.nr_sources = ARRAY_SIZE(clk_epllref_sources),
|
||||
},
|
||||
.reg_src = { .reg = S3C2443_CLKSRC, .size = 2, .shift = 7 },
|
||||
};
|
||||
|
||||
/* esysclk
|
||||
*
|
||||
* this is sourced from either the EPLL or the EPLLref clock
|
||||
*/
|
||||
|
||||
static struct clk *clk_sysclk_sources[] = {
|
||||
[0] = &clk_epllref.clk,
|
||||
[1] = &clk_epll,
|
||||
};
|
||||
|
||||
struct clksrc_clk clk_esysclk = {
|
||||
.clk = {
|
||||
.name = "esysclk",
|
||||
.parent = &clk_epll,
|
||||
.id = -1,
|
||||
},
|
||||
.sources = &(struct clksrc_sources) {
|
||||
.sources = clk_sysclk_sources,
|
||||
.nr_sources = ARRAY_SIZE(clk_sysclk_sources),
|
||||
},
|
||||
.reg_src = { .reg = S3C2443_CLKSRC, .size = 1, .shift = 6 },
|
||||
};
|
||||
|
||||
static unsigned long s3c2443_getrate_mdivclk(struct clk *clk)
|
||||
{
|
||||
unsigned long parent_rate = clk_get_rate(clk->parent);
|
||||
unsigned long div = __raw_readl(S3C2443_CLKDIV0);
|
||||
|
||||
div &= S3C2443_CLKDIV0_EXTDIV_MASK;
|
||||
div >>= (S3C2443_CLKDIV0_EXTDIV_SHIFT-1); /* x2 */
|
||||
|
||||
return parent_rate / (div + 1);
|
||||
}
|
||||
|
||||
static struct clk clk_mdivclk = {
|
||||
.name = "mdivclk",
|
||||
.parent = &clk_mpllref,
|
||||
.id = -1,
|
||||
.ops = &(struct clk_ops) {
|
||||
.get_rate = s3c2443_getrate_mdivclk,
|
||||
},
|
||||
};
|
||||
|
||||
static struct clk *clk_msysclk_sources[] = {
|
||||
[0] = &clk_mpllref,
|
||||
[1] = &clk_mpll,
|
||||
[2] = &clk_mdivclk,
|
||||
[3] = &clk_mpllref,
|
||||
};
|
||||
|
||||
struct clksrc_clk clk_msysclk = {
|
||||
.clk = {
|
||||
.name = "msysclk",
|
||||
.parent = &clk_xtal,
|
||||
.id = -1,
|
||||
},
|
||||
.sources = &(struct clksrc_sources) {
|
||||
.sources = clk_msysclk_sources,
|
||||
.nr_sources = ARRAY_SIZE(clk_msysclk_sources),
|
||||
},
|
||||
.reg_src = { .reg = S3C2443_CLKSRC, .size = 2, .shift = 3 },
|
||||
};
|
||||
|
||||
/* prediv
|
||||
*
|
||||
* this divides the msysclk down to pass to h/p/etc.
|
||||
*/
|
||||
|
||||
static unsigned long s3c2443_prediv_getrate(struct clk *clk)
|
||||
{
|
||||
unsigned long rate = clk_get_rate(clk->parent);
|
||||
unsigned long clkdiv0 = __raw_readl(S3C2443_CLKDIV0);
|
||||
|
||||
clkdiv0 &= S3C2443_CLKDIV0_PREDIV_MASK;
|
||||
clkdiv0 >>= S3C2443_CLKDIV0_PREDIV_SHIFT;
|
||||
|
||||
return rate / (clkdiv0 + 1);
|
||||
}
|
||||
|
||||
static struct clk clk_prediv = {
|
||||
.name = "prediv",
|
||||
.id = -1,
|
||||
.parent = &clk_msysclk.clk,
|
||||
.ops = &(struct clk_ops) {
|
||||
.get_rate = s3c2443_prediv_getrate,
|
||||
},
|
||||
};
|
||||
|
||||
/* usbhost
|
||||
*
|
||||
* usb host bus-clock, usually 48MHz to provide USB bus clock timing
|
||||
*/
|
||||
|
||||
static struct clksrc_clk clk_usb_bus_host = {
|
||||
.clk = {
|
||||
.name = "usb-bus-host-parent",
|
||||
.id = -1,
|
||||
.parent = &clk_esysclk.clk,
|
||||
.ctrlbit = S3C2443_SCLKCON_USBHOST,
|
||||
.enable = s3c2443_clkcon_enable_s,
|
||||
},
|
||||
.reg_div = { .reg = S3C2443_CLKDIV1, .size = 2, .shift = 4 },
|
||||
};
|
||||
|
||||
/* common clksrc clocks */
|
||||
|
||||
static struct clksrc_clk clksrc_clks[] = {
|
||||
{
|
||||
/* ART baud-rate clock sourced from esysclk via a divisor */
|
||||
.clk = {
|
||||
.name = "uartclk",
|
||||
.id = -1,
|
||||
.parent = &clk_esysclk.clk,
|
||||
},
|
||||
.reg_div = { .reg = S3C2443_CLKDIV1, .size = 4, .shift = 8 },
|
||||
}, {
|
||||
/* camera interface bus-clock, divided down from esysclk */
|
||||
.clk = {
|
||||
.name = "camif-upll", /* same as 2440 name */
|
||||
.id = -1,
|
||||
.parent = &clk_esysclk.clk,
|
||||
.ctrlbit = S3C2443_SCLKCON_CAMCLK,
|
||||
.enable = s3c2443_clkcon_enable_s,
|
||||
},
|
||||
.reg_div = { .reg = S3C2443_CLKDIV1, .size = 4, .shift = 26 },
|
||||
}, {
|
||||
.clk = {
|
||||
.name = "display-if",
|
||||
.id = -1,
|
||||
.parent = &clk_esysclk.clk,
|
||||
.ctrlbit = S3C2443_SCLKCON_DISPCLK,
|
||||
.enable = s3c2443_clkcon_enable_s,
|
||||
},
|
||||
.reg_div = { .reg = S3C2443_CLKDIV1, .size = 8, .shift = 16 },
|
||||
},
|
||||
};
|
||||
|
||||
|
||||
static struct clk init_clocks_off[] = {
|
||||
{
|
||||
.name = "adc",
|
||||
.id = -1,
|
||||
.parent = &clk_p,
|
||||
.enable = s3c2443_clkcon_enable_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_ADC,
|
||||
}, {
|
||||
.name = "i2c",
|
||||
.id = -1,
|
||||
.parent = &clk_p,
|
||||
.enable = s3c2443_clkcon_enable_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_IIC,
|
||||
}
|
||||
};
|
||||
|
||||
static struct clk init_clocks[] = {
|
||||
{
|
||||
.name = "dma",
|
||||
.id = 0,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_DMA0,
|
||||
}, {
|
||||
.name = "dma",
|
||||
.id = 1,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_DMA1,
|
||||
}, {
|
||||
.name = "dma",
|
||||
.id = 2,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_DMA2,
|
||||
}, {
|
||||
.name = "dma",
|
||||
.id = 3,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_DMA3,
|
||||
}, {
|
||||
.name = "dma",
|
||||
.id = 4,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_DMA4,
|
||||
}, {
|
||||
.name = "dma",
|
||||
.id = 5,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_DMA5,
|
||||
}, {
|
||||
.name = "hsmmc",
|
||||
.id = 0,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_HSMMC,
|
||||
}, {
|
||||
.name = "gpio",
|
||||
.id = -1,
|
||||
.parent = &clk_p,
|
||||
.enable = s3c2443_clkcon_enable_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_GPIO,
|
||||
}, {
|
||||
.name = "usb-host",
|
||||
.id = -1,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_USBH,
|
||||
}, {
|
||||
.name = "usb-device",
|
||||
.id = -1,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_USBD,
|
||||
}, {
|
||||
.name = "lcd",
|
||||
.id = -1,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_LCDC,
|
||||
|
||||
}, {
|
||||
.name = "timers",
|
||||
.id = -1,
|
||||
.parent = &clk_p,
|
||||
.enable = s3c2443_clkcon_enable_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_PWMT,
|
||||
}, {
|
||||
.name = "cfc",
|
||||
.id = -1,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_CFC,
|
||||
}, {
|
||||
.name = "ssmc",
|
||||
.id = -1,
|
||||
.parent = &clk_h,
|
||||
.enable = s3c2443_clkcon_enable_h,
|
||||
.ctrlbit = S3C2443_HCLKCON_SSMC,
|
||||
}, {
|
||||
.name = "uart",
|
||||
.id = 0,
|
||||
.parent = &clk_p,
|
||||
.enable = s3c2443_clkcon_enable_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_UART0,
|
||||
}, {
|
||||
.name = "uart",
|
||||
.id = 1,
|
||||
.parent = &clk_p,
|
||||
.enable = s3c2443_clkcon_enable_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_UART1,
|
||||
}, {
|
||||
.name = "uart",
|
||||
.id = 2,
|
||||
.parent = &clk_p,
|
||||
.enable = s3c2443_clkcon_enable_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_UART2,
|
||||
}, {
|
||||
.name = "uart",
|
||||
.id = 3,
|
||||
.parent = &clk_p,
|
||||
.enable = s3c2443_clkcon_enable_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_UART3,
|
||||
}, {
|
||||
.name = "rtc",
|
||||
.id = -1,
|
||||
.parent = &clk_p,
|
||||
.enable = s3c2443_clkcon_enable_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_RTC,
|
||||
}, {
|
||||
.name = "watchdog",
|
||||
.id = -1,
|
||||
.parent = &clk_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_WDT,
|
||||
}, {
|
||||
.name = "ac97",
|
||||
.id = -1,
|
||||
.parent = &clk_p,
|
||||
.ctrlbit = S3C2443_PCLKCON_AC97,
|
||||
}, {
|
||||
.name = "nand",
|
||||
.id = -1,
|
||||
.parent = &clk_h,
|
||||
}, {
|
||||
.name = "usb-bus-host",
|
||||
.id = -1,
|
||||
.parent = &clk_usb_bus_host.clk,
|
||||
}
|
||||
};
|
||||
|
||||
static inline unsigned long s3c2443_get_hdiv(unsigned long clkcon0)
|
||||
{
|
||||
clkcon0 &= S3C2443_CLKDIV0_HCLKDIV_MASK;
|
||||
|
||||
return clkcon0 + 1;
|
||||
}
|
||||
|
||||
/* EPLLCON compatible enough to get on/off information */
|
||||
|
||||
void __init_or_cpufreq s3c2443_common_setup_clocks(pll_fn get_mpll,
|
||||
fdiv_fn get_fdiv)
|
||||
{
|
||||
unsigned long epllcon = __raw_readl(S3C2443_EPLLCON);
|
||||
unsigned long mpllcon = __raw_readl(S3C2443_MPLLCON);
|
||||
unsigned long clkdiv0 = __raw_readl(S3C2443_CLKDIV0);
|
||||
struct clk *xtal_clk;
|
||||
unsigned long xtal;
|
||||
unsigned long pll;
|
||||
unsigned long fclk;
|
||||
unsigned long hclk;
|
||||
unsigned long pclk;
|
||||
int ptr;
|
||||
|
||||
xtal_clk = clk_get(NULL, "xtal");
|
||||
xtal = clk_get_rate(xtal_clk);
|
||||
clk_put(xtal_clk);
|
||||
|
||||
pll = get_mpll(mpllcon, xtal);
|
||||
clk_msysclk.clk.rate = pll;
|
||||
|
||||
fclk = pll / get_fdiv(clkdiv0);
|
||||
hclk = s3c2443_prediv_getrate(&clk_prediv);
|
||||
hclk /= s3c2443_get_hdiv(clkdiv0);
|
||||
pclk = hclk / ((clkdiv0 & S3C2443_CLKDIV0_HALF_PCLK) ? 2 : 1);
|
||||
|
||||
s3c24xx_setup_clocks(fclk, hclk, pclk);
|
||||
|
||||
printk("CPU: MPLL %s %ld.%03ld MHz, cpu %ld.%03ld MHz, mem %ld.%03ld MHz, pclk %ld.%03ld MHz\n",
|
||||
(mpllcon & S3C2443_PLLCON_OFF) ? "off":"on",
|
||||
print_mhz(pll), print_mhz(fclk),
|
||||
print_mhz(hclk), print_mhz(pclk));
|
||||
|
||||
for (ptr = 0; ptr < ARRAY_SIZE(clksrc_clks); ptr++)
|
||||
s3c_set_clksrc(&clksrc_clks[ptr], true);
|
||||
|
||||
/* ensure usb bus clock is within correct rate of 48MHz */
|
||||
|
||||
if (clk_get_rate(&clk_usb_bus_host.clk) != (48 * 1000 * 1000)) {
|
||||
printk(KERN_INFO "Warning: USB host bus not at 48MHz\n");
|
||||
clk_set_rate(&clk_usb_bus_host.clk, 48*1000*1000);
|
||||
}
|
||||
|
||||
printk("CPU: EPLL %s %ld.%03ld MHz, usb-bus %ld.%03ld MHz\n",
|
||||
(epllcon & S3C2443_PLLCON_OFF) ? "off":"on",
|
||||
print_mhz(clk_get_rate(&clk_epll)),
|
||||
print_mhz(clk_get_rate(&clk_usb_bus)));
|
||||
}
|
||||
|
||||
static struct clk *clks[] __initdata = {
|
||||
&clk_prediv,
|
||||
&clk_mpllref,
|
||||
&clk_mdivclk,
|
||||
&clk_ext,
|
||||
&clk_epll,
|
||||
&clk_usb_bus,
|
||||
};
|
||||
|
||||
static struct clksrc_clk *clksrcs[] __initdata = {
|
||||
&clk_usb_bus_host,
|
||||
&clk_epllref,
|
||||
&clk_esysclk,
|
||||
&clk_msysclk,
|
||||
};
|
||||
|
||||
void __init s3c2443_common_init_clocks(int xtal, pll_fn get_mpll,
|
||||
fdiv_fn get_fdiv)
|
||||
{
|
||||
int ptr;
|
||||
|
||||
/* s3c2443 parents h and p clocks from prediv */
|
||||
clk_h.parent = &clk_prediv;
|
||||
clk_p.parent = &clk_prediv;
|
||||
|
||||
clk_usb_bus.parent = &clk_usb_bus_host.clk;
|
||||
clk_epll.parent = &clk_epllref.clk;
|
||||
|
||||
s3c24xx_register_baseclocks(xtal);
|
||||
s3c24xx_register_clocks(clks, ARRAY_SIZE(clks));
|
||||
|
||||
for (ptr = 0; ptr < ARRAY_SIZE(clksrcs); ptr++)
|
||||
s3c_register_clksrc(clksrcs[ptr], 1);
|
||||
|
||||
s3c_register_clksrc(clksrc_clks, ARRAY_SIZE(clksrc_clks));
|
||||
s3c_register_clocks(init_clocks, ARRAY_SIZE(init_clocks));
|
||||
|
||||
/* See s3c2443/etc notes on disabling clocks at init time */
|
||||
s3c_register_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
|
||||
s3c_disable_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
|
||||
|
||||
s3c2443_common_setup_clocks(get_mpll, get_fdiv);
|
||||
}
|
||||
Loading…
Reference in New Issue