[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>

diff --git a/arch/arm/mach-s3c2410/s3c2410.c b/arch/arm/mach-s3c2410/s3c2410.c
index 4e23bc0..feb141b 100644 (file)
--- 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 4bd2b5f..5b5aba6 100644 (file)
--- 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 f854e73..1df8429 100644 (file)
--- 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 334e696..a4a0a67 100644 (file)
--- 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 88a00c3..ba174aa 100644 (file)
--- 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 8efb57a..bc37cf4 100644 (file)
--- 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 7f33cef..4943684 100644 (file)
--- 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();
 }