[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>

7 files changed, 104 insertions, 36 deletions

diff --git a/arch/arm/mach-s3c2410/s3c2410.c b/arch/arm/mach-s3c2410/s3c2410.c
index 4e23bc05f4b5..feb141b1f915 100644
--- a/arch/arm/mach-s3c2410/s3c2410.c
+++ b/arch/arm/mach-s3c2410/s3c2410.c
@@ -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();
 }
 
diff --git a/arch/arm/mach-s3c2412/s3c2412.c b/arch/arm/mach-s3c2412/s3c2412.c
index 4bd2b5fb8669..5b5aba69ec3f 100644
--- a/arch/arm/mach-s3c2412/s3c2412.c
+++ b/arch/arm/mach-s3c2412/s3c2412.c
@@ -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();
 }
 
diff --git a/arch/arm/mach-s3c2443/clock.c b/arch/arm/mach-s3c2443/clock.c
index f854e7385e3c..1df8429242b8 100644
--- a/arch/arm/mach-s3c2443/clock.c
+++ b/arch/arm/mach-s3c2443/clock.c
@@ -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 */
diff --git a/arch/arm/plat-s3c24xx/clock.c b/arch/arm/plat-s3c24xx/clock.c
index 334e696200be..a4a0a67a3074 100644
--- a/arch/arm/plat-s3c24xx/clock.c
+++ b/arch/arm/plat-s3c24xx/clock.c
@@ -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,
-                                unsigned long hclk,
-                                unsigned long pclk)
+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;
 }
+
diff --git a/arch/arm/plat-s3c24xx/include/plat/clock.h b/arch/arm/plat-s3c24xx/include/plat/clock.h
index 88a00c35b685..ba174aab76f2 100644
--- a/arch/arm/plat-s3c24xx/include/plat/clock.h
+++ b/arch/arm/plat-s3c24xx/include/plat/clock.h
@@ -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,
-                                unsigned long hclk,
-                                unsigned long pclk);
+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);
+
diff --git a/arch/arm/plat-s3c24xx/pm.c b/arch/arm/plat-s3c24xx/pm.c
index 8efb57ad5019..bc37cf49f973 100644
--- a/arch/arm/plat-s3c24xx/pm.c
+++ b/arch/arm/plat-s3c24xx/pm.c
@@ -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 {
diff --git a/arch/arm/plat-s3c24xx/s3c244x.c b/arch/arm/plat-s3c24xx/s3c244x.c
index 7f33cef20bac..494368403055 100644
--- a/arch/arm/plat-s3c24xx/s3c244x.c
+++ b/arch/arm/plat-s3c24xx/s3c244x.c
@@ -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();
 }