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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 2010-04-28 18:03:57 +09:00
parent d11a7d7100
commit af337f3e63
6 changed files with 505 additions and 446 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/mach-s3c2443/Kconfig
View File

@ -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

452
arch/arm/mach-s3c2443/clock.c
View File

@ -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));

6
arch/arm/plat-s3c24xx/Kconfig
View File

@ -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

1
arch/arm/plat-s3c24xx/Makefile
View File

@ -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

19
arch/arm/plat-s3c24xx/include/plat/s3c2443.h
View File

@ -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;

472
arch/arm/plat-s3c24xx/s3c2443-clock.c Normal file
View File

@ -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);
}