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[ARM] S3C24XX: Update clock data on resume 

Update the clock settings on resume for suspend/resume
support so that if the boot loader changes anything or
the system's PLL is reset then we return with the correct
settings.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Ben Dooks 2008-10-21 14:06:38 +01:00
parent c3391e36d6
commit e425382ed9
7 changed files with 104 additions and 36 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
arch/arm/mach-s3c2410/s3c2410.c
View File

@ -16,6 +16,7 @@
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/clk.h>
#include <linux/sysdev.h>
#include <linux/serial_core.h>
#include <linux/platform_device.h>
@ -28,6 +29,8 @@
#include <mach/hardware.h>
#include <asm/irq.h>
#include <plat/cpu-freq.h>
#include <mach/regs-clock.h>
#include <plat/regs-serial.h>
@ -65,13 +68,19 @@ void __init s3c2410_map_io(void)
iotable_init(s3c2410_iodesc, ARRAY_SIZE(s3c2410_iodesc));
}
void __init s3c2410_init_clocks(int xtal)
void __init_or_cpufreq s3c2410_setup_clocks(void)
{
struct clk *xtal_clk;
unsigned long tmp;
unsigned long xtal;
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);
/* now we've got our machine bits initialised, work out what
* clocks we've got */
@ -93,7 +102,13 @@ void __init s3c2410_init_clocks(int xtal)
* console to use them
*/
s3c24xx_setup_clocks(xtal, fclk, hclk, pclk);
s3c24xx_setup_clocks(fclk, hclk, pclk);
}
void __init s3c2410_init_clocks(int xtal)
{
s3c24xx_register_baseclocks(xtal);
s3c2410_setup_clocks();
s3c2410_baseclk_add();
}

21
arch/arm/mach-s3c2412/s3c2412.c
View File

@ -16,6 +16,7 @@
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/sysdev.h>
#include <linux/serial_core.h>
@ -33,6 +34,8 @@
#include <mach/reset.h>
#include <mach/idle.h>
#include <plat/cpu-freq.h>
#include <mach/regs-clock.h>
#include <plat/regs-serial.h>
#include <mach/regs-power.h>
@ -156,17 +159,23 @@ void __init s3c2412_map_io(void)
iotable_init(s3c2412_iodesc, ARRAY_SIZE(s3c2412_iodesc));
}
void __init s3c2412_init_clocks(int xtal)
void __init_or_cpufreq s3c2412_setup_clocks(void)
{
struct clk *xtal_clk;
unsigned long tmp;
unsigned long xtal;
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);
/* now we've got our machine bits initialised, work out what
* clocks we've got */
fclk = s3c24xx_get_pll(__raw_readl(S3C2410_MPLLCON), xtal*2);
fclk = s3c24xx_get_pll(__raw_readl(S3C2410_MPLLCON), xtal * 2);
clk_mpll.rate = fclk;
@ -183,11 +192,17 @@ void __init s3c2412_init_clocks(int xtal)
printk("S3C2412: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n",
print_mhz(fclk), print_mhz(hclk), print_mhz(pclk));
s3c24xx_setup_clocks(fclk, hclk, pclk);
}
void __init s3c2412_init_clocks(int xtal)
{
/* initialise the clocks here, to allow other things like the
* console to use them
*/
s3c24xx_setup_clocks(xtal, fclk, hclk, pclk);
s3c24xx_register_baseclocks(xtal);
s3c2412_setup_clocks();
s3c2412_baseclk_add();
}

35
arch/arm/mach-s3c2443/clock.c
View File

@ -39,6 +39,8 @@
#include <mach/regs-s3c2443-clock.h>
#include <plat/cpu-freq.h>
#include <plat/s3c2443.h>
#include <plat/clock.h>
#include <plat/cpu.h>
@ -1011,22 +1013,20 @@ static struct clk *clks[] __initdata = {
&clk_prediv,
};
void __init s3c2443_init_clocks(int xtal)
void __init_or_cpufreq s3c2443_setup_clocks(void)
{
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;
struct clk *clkp;
int ret;
int ptr;
/* s3c2443 parents h and p clocks from prediv */
clk_h.parent = &clk_prediv;
clk_p.parent = &clk_prediv;
xtal_clk = clk_get(NULL, "xtal");
xtal = clk_get_rate(xtal_clk);
clk_put(xtal_clk);
pll = s3c2443_get_mpll(mpllcon, xtal);
clk_msysclk.rate = pll;
@ -1036,13 +1036,29 @@ void __init s3c2443_init_clocks(int xtal)
hclk /= s3c2443_get_hdiv(clkdiv0);
pclk = hclk / ((clkdiv0 & S3C2443_CLKDIV0_HALF_PCLK) ? 2 : 1);
s3c24xx_setup_clocks(xtal, fclk, hclk, pclk);
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);
}
void __init s3c2443_init_clocks(int xtal)
{
struct clk *clkp;
unsigned long epllcon = __raw_readl(S3C2443_EPLLCON);
int ret;
int ptr;
/* s3c2443 parents h and p clocks from prediv */
clk_h.parent = &clk_prediv;
clk_p.parent = &clk_prediv;
s3c24xx_register_baseclocks(xtal);
s3c2443_setup_clocks();
s3c2443_clk_initparents();
for (ptr = 0; ptr < ARRAY_SIZE(clks); ptr++) {
@ -1056,7 +1072,6 @@ void __init s3c2443_init_clocks(int xtal)
}
clk_epll.rate = s3c2443_get_epll(epllcon, xtal);
clk_usb_bus.parent = &clk_usb_bus_host;
/* ensure usb bus clock is within correct rate of 48MHz */

21
arch/arm/plat-s3c24xx/clock.c
View File

@ -47,6 +47,8 @@
#include <mach/regs-clock.h>
#include <mach/regs-gpio.h>
#include <plat/cpu-freq.h>
#include <plat/clock.h>
#include <plat/cpu.h>
#include <plat/pll.h>
@ -327,24 +329,24 @@ int s3c24xx_register_clocks(struct clk **clks, int nr_clks)
/* initalise all the clocks */
int __init s3c24xx_setup_clocks(unsigned long xtal,
unsigned long fclk,
void __init_or_cpufreq s3c24xx_setup_clocks(unsigned long fclk,
unsigned long hclk,
unsigned long pclk)
{
printk(KERN_INFO "S3C24XX Clocks, (c) 2004 Simtec Electronics\n");
/* initialise the main system clocks */
clk_xtal.rate = xtal;
clk_upll.rate = s3c24xx_get_pll(__raw_readl(S3C2410_UPLLCON), xtal);
clk_upll.rate = s3c24xx_get_pll(__raw_readl(S3C2410_UPLLCON),
clk_xtal.rate);
clk_mpll.rate = fclk;
clk_h.rate = hclk;
clk_p.rate = pclk;
clk_f.rate = fclk;
}
/* assume uart clocks are correctly setup */
int __init s3c24xx_register_baseclocks(unsigned long xtal)
{
printk(KERN_INFO "S3C24XX Clocks, (c) 2004 Simtec Electronics\n");
clk_xtal.rate = xtal;
/* register our clocks */
@ -368,3 +370,4 @@ int __init s3c24xx_setup_clocks(unsigned long xtal,
return 0;
}

11
arch/arm/plat-s3c24xx/include/plat/clock.h
View File

@ -60,7 +60,14 @@ extern int s3c2410_clkcon_enable(struct clk *clk, int enable);
extern int s3c24xx_register_clock(struct clk *clk);
extern int s3c24xx_register_clocks(struct clk **clk, int nr_clks);
extern int s3c24xx_setup_clocks(unsigned long xtal,
unsigned long fclk,
extern int s3c24xx_register_baseclocks(unsigned long xtal);
extern void s3c24xx_setup_clocks(unsigned long fclk,
unsigned long hclk,
unsigned long pclk);
extern void s3c2410_setup_clocks(void);
extern void s3c2412_setup_clocks(void);
extern void s3c244x_setup_clocks(void);
extern void s3c2443_setup_clocks(void);

4
arch/arm/plat-s3c24xx/pm.c
View File

@ -76,11 +76,13 @@ static struct sleep_save core_save[] = {
SAVE_ITEM(S3C2410_BANKCON4),
SAVE_ITEM(S3C2410_BANKCON5),
#ifndef CONFIG_CPU_FREQ
SAVE_ITEM(S3C2410_CLKDIVN),
SAVE_ITEM(S3C2410_MPLLCON),
SAVE_ITEM(S3C2410_REFRESH),
#endif
SAVE_ITEM(S3C2410_UPLLCON),
SAVE_ITEM(S3C2410_CLKSLOW),
SAVE_ITEM(S3C2410_REFRESH),
};
static struct gpio_sleep {

21
arch/arm/plat-s3c24xx/s3c244x.c
View File

@ -29,6 +29,8 @@
#include <mach/hardware.h>
#include <asm/irq.h>
#include <plat/cpu-freq.h>
#include <mach/regs-clock.h>
#include <plat/regs-serial.h>
#include <mach/regs-gpio.h>
@ -71,15 +73,18 @@ void __init s3c244x_map_io(void)
s3c_device_usbgadget.name = "s3c2440-usbgadget";
}
void __init s3c244x_init_clocks(int xtal)
void __init_or_cpufreq s3c244x_setup_clocks(void)
{
struct clk *xtal_clk;
unsigned long clkdiv;
unsigned long camdiv;
unsigned long xtal;
unsigned long hclk, fclk, pclk;
int hdiv = 1;
/* now we've got our machine bits initialised, work out what
* clocks we've got */
xtal_clk = clk_get(NULL, "xtal");
xtal = clk_get_rate(xtal_clk);
clk_put(xtal_clk);
fclk = s3c24xx_get_pll(__raw_readl(S3C2410_MPLLCON), xtal) * 2;
@ -107,18 +112,24 @@ void __init s3c244x_init_clocks(int xtal)
}
hclk = fclk / hdiv;
pclk = hclk / ((clkdiv & S3C2440_CLKDIVN_PDIVN)? 2:1);
pclk = hclk / ((clkdiv & S3C2440_CLKDIVN_PDIVN) ? 2 : 1);
/* print brief summary of clocks, etc */
printk("S3C244X: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n",
print_mhz(fclk), print_mhz(hclk), print_mhz(pclk));
s3c24xx_setup_clocks(fclk, hclk, pclk);
}
void __init s3c244x_init_clocks(int xtal)
{
/* initialise the clocks here, to allow other things like the
* console to use them, and to add new ones after the initialisation
*/
s3c24xx_setup_clocks(xtal, fclk, hclk, pclk);
s3c24xx_register_baseclocks(xtal);
s3c244x_setup_clocks();
s3c2410_baseclk_add();
}