[ARM] pxa: introduce sysdev for GPIO register saving/restoring

Signed-off-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mach-pxa/generic.c b/arch/arm/mach-pxa/generic.c
index 698aeec529617e4098db8e30ee1e4d9a4d56cf48..76970598f55071faefa72df5ac6970db61b8d2fe 100644 (file)
--- a/arch/arm/mach-pxa/generic.c
+++ b/arch/arm/mach-pxa/generic.c
@@ -23,6 +23,7 @@
 #include <linux/ioport.h>
 #include <linux/pm.h>
 #include <linux/string.h>
+#include <linux/sysdev.h>
 
 #include <asm/hardware.h>
 #include <asm/irq.h>
@@ -226,3 +227,59 @@ void __init pxa_map_io(void)
        iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
        get_clk_frequency_khz(1);
 }
+
+#ifdef CONFIG_PM
+
+static unsigned long saved_gplr[4];
+static unsigned long saved_gpdr[4];
+static unsigned long saved_grer[4];
+static unsigned long saved_gfer[4];
+
+static int pxa_gpio_suspend(struct sys_device *dev, pm_message_t state)
+{
+       int i, gpio;
+
+       for (gpio = 0, i = 0; gpio < pxa_last_gpio; gpio += 32, i++) {
+               saved_gplr[i] = GPLR(gpio);
+               saved_gpdr[i] = GPDR(gpio);
+               saved_grer[i] = GRER(gpio);
+               saved_gfer[i] = GFER(gpio);
+
+               /* Clear GPIO transition detect bits */
+               GEDR(gpio) = GEDR(gpio);
+       }
+       return 0;
+}
+
+static int pxa_gpio_resume(struct sys_device *dev)
+{
+       int i, gpio;
+
+       for (gpio = 0, i = 0; gpio < pxa_last_gpio; gpio += 32, i++) {
+               /* restore level with set/clear */
+               GPSR(gpio) = saved_gplr[i];
+               GPCR(gpio) = ~saved_gplr[i];
+
+               GRER(gpio) = saved_grer[i];
+               GFER(gpio) = saved_gfer[i];
+               GPDR(gpio) = saved_gpdr[i];
+       }
+       return 0;
+}
+#else
+#define pxa_gpio_suspend       NULL
+#define pxa_gpio_resume                NULL
+#endif
+
+struct sysdev_class pxa_gpio_sysclass = {
+       .name           = "gpio",
+       .suspend        = pxa_gpio_suspend,
+       .resume         = pxa_gpio_resume,
+};
+
+static int __init pxa_gpio_init(void)
+{
+       return sysdev_class_register(&pxa_gpio_sysclass);
+}
+
+core_initcall(pxa_gpio_init);

diff --git a/arch/arm/mach-pxa/generic.h b/arch/arm/mach-pxa/generic.h
index 367b67923e11d90f4bfc55ed241835b7c7d4173b..1a16ad3ecee6e8c5b9e535d8cb8bba0936406b05 100644 (file)
--- a/arch/arm/mach-pxa/generic.h
+++ b/arch/arm/mach-pxa/generic.h
@@ -54,3 +54,4 @@ extern unsigned pxa3xx_get_memclk_frequency_10khz(void);
 #endif
 
 extern struct sysdev_class pxa_irq_sysclass;
+extern struct sysdev_class pxa_gpio_sysclass;

diff --git a/arch/arm/mach-pxa/pxa25x.c b/arch/arm/mach-pxa/pxa25x.c
index 797635eec6b6072601bbc40fcc64d10048672bbb..599e53fcc2c5abb7b039269e506dd8d2d71aeaff 100644 (file)
--- a/arch/arm/mach-pxa/pxa25x.c
+++ b/arch/arm/mach-pxa/pxa25x.c
@@ -142,11 +142,6 @@ static struct clk pxa25x_clks[] = {
 #define SAVE(x)                sleep_save[SLEEP_SAVE_##x] = x
 #define RESTORE(x)     x = sleep_save[SLEEP_SAVE_##x]
 
-#define RESTORE_GPLEVEL(n) do { \
-       GPSR##n = sleep_save[SLEEP_SAVE_GPLR##n]; \
-       GPCR##n = ~sleep_save[SLEEP_SAVE_GPLR##n]; \
-} while (0)
-
 /*
  * List of global PXA peripheral registers to preserve.
  * More ones like CP and general purpose register values are preserved
@@ -154,10 +149,6 @@ static struct clk pxa25x_clks[] = {
  */
 enum { SLEEP_SAVE_START = 0,
 
-       SLEEP_SAVE_GPLR0, SLEEP_SAVE_GPLR1, SLEEP_SAVE_GPLR2,
-       SLEEP_SAVE_GPDR0, SLEEP_SAVE_GPDR1, SLEEP_SAVE_GPDR2,
-       SLEEP_SAVE_GRER0, SLEEP_SAVE_GRER1, SLEEP_SAVE_GRER2,
-       SLEEP_SAVE_GFER0, SLEEP_SAVE_GFER1, SLEEP_SAVE_GFER2,
        SLEEP_SAVE_PGSR0, SLEEP_SAVE_PGSR1, SLEEP_SAVE_PGSR2,
 
        SLEEP_SAVE_GAFR0_L, SLEEP_SAVE_GAFR0_U,
@@ -174,10 +165,6 @@ enum {     SLEEP_SAVE_START = 0,
 
 static void pxa25x_cpu_pm_save(unsigned long *sleep_save)
 {
-       SAVE(GPLR0); SAVE(GPLR1); SAVE(GPLR2);
-       SAVE(GPDR0); SAVE(GPDR1); SAVE(GPDR2);
-       SAVE(GRER0); SAVE(GRER1); SAVE(GRER2);
-       SAVE(GFER0); SAVE(GFER1); SAVE(GFER2);
        SAVE(PGSR0); SAVE(PGSR1); SAVE(PGSR2);
 
        SAVE(GAFR0_L); SAVE(GAFR0_U);
@@ -197,13 +184,9 @@ static void pxa25x_cpu_pm_restore(unsigned long *sleep_save)
        PSPR = 0;
 
        /* restore registers */
-       RESTORE_GPLEVEL(0); RESTORE_GPLEVEL(1); RESTORE_GPLEVEL(2);
-       RESTORE(GPDR0); RESTORE(GPDR1); RESTORE(GPDR2);
        RESTORE(GAFR0_L); RESTORE(GAFR0_U);
        RESTORE(GAFR1_L); RESTORE(GAFR1_U);
        RESTORE(GAFR2_L); RESTORE(GAFR2_U);
-       RESTORE(GRER0); RESTORE(GRER1); RESTORE(GRER2);
-       RESTORE(GFER0); RESTORE(GFER1); RESTORE(GFER2);
        RESTORE(PGSR0); RESTORE(PGSR1); RESTORE(PGSR2);
 
        PSSR = PSSR_RDH | PSSR_PH;
@@ -302,6 +285,8 @@ static struct platform_device *pxa25x_devices[] __initdata = {
 static struct sys_device pxa25x_sysdev[] = {
        {
                .cls    = &pxa_irq_sysclass,
+       }, {
+               .cls    = &pxa_gpio_sysclass,
        },
 };
 

diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c
index 343296a710b3e1ec4f2f1b4b31e9c94a35b854eb..46a951c3e5a0097e5c280bda04bbca0cf4936fb2 100644 (file)
--- a/arch/arm/mach-pxa/pxa27x.c
+++ b/arch/arm/mach-pxa/pxa27x.c
@@ -172,11 +172,6 @@ static struct clk pxa27x_clks[] = {
 #define SAVE(x)                sleep_save[SLEEP_SAVE_##x] = x
 #define RESTORE(x)     x = sleep_save[SLEEP_SAVE_##x]
 
-#define RESTORE_GPLEVEL(n) do { \
-       GPSR##n = sleep_save[SLEEP_SAVE_GPLR##n]; \
-       GPCR##n = ~sleep_save[SLEEP_SAVE_GPLR##n]; \
-} while (0)
-
 /*
  * List of global PXA peripheral registers to preserve.
  * More ones like CP and general purpose register values are preserved
@@ -184,10 +179,6 @@ static struct clk pxa27x_clks[] = {
  */
 enum { SLEEP_SAVE_START = 0,
 
-       SLEEP_SAVE_GPLR0, SLEEP_SAVE_GPLR1, SLEEP_SAVE_GPLR2, SLEEP_SAVE_GPLR3,
-       SLEEP_SAVE_GPDR0, SLEEP_SAVE_GPDR1, SLEEP_SAVE_GPDR2, SLEEP_SAVE_GPDR3,
-       SLEEP_SAVE_GRER0, SLEEP_SAVE_GRER1, SLEEP_SAVE_GRER2, SLEEP_SAVE_GRER3,
-       SLEEP_SAVE_GFER0, SLEEP_SAVE_GFER1, SLEEP_SAVE_GFER2, SLEEP_SAVE_GFER3,
        SLEEP_SAVE_PGSR0, SLEEP_SAVE_PGSR1, SLEEP_SAVE_PGSR2, SLEEP_SAVE_PGSR3,
 
        SLEEP_SAVE_GAFR0_L, SLEEP_SAVE_GAFR0_U,
@@ -208,10 +199,6 @@ enum {     SLEEP_SAVE_START = 0,
 
 void pxa27x_cpu_pm_save(unsigned long *sleep_save)
 {
-       SAVE(GPLR0); SAVE(GPLR1); SAVE(GPLR2); SAVE(GPLR3);
-       SAVE(GPDR0); SAVE(GPDR1); SAVE(GPDR2); SAVE(GPDR3);
-       SAVE(GRER0); SAVE(GRER1); SAVE(GRER2); SAVE(GRER3);
-       SAVE(GFER0); SAVE(GFER1); SAVE(GFER2); SAVE(GFER3);
        SAVE(PGSR0); SAVE(PGSR1); SAVE(PGSR2); SAVE(PGSR3);
 
        SAVE(GAFR0_L); SAVE(GAFR0_U);
@@ -225,9 +212,6 @@ void pxa27x_cpu_pm_save(unsigned long *sleep_save)
 
        SAVE(CKEN);
        SAVE(PSTR);
-
-       /* Clear GPIO transition detect bits */
-       GEDR0 = GEDR0; GEDR1 = GEDR1; GEDR2 = GEDR2; GEDR3 = GEDR3;
 }
 
 void pxa27x_cpu_pm_restore(unsigned long *sleep_save)
@@ -236,15 +220,10 @@ void pxa27x_cpu_pm_restore(unsigned long *sleep_save)
        PSPR = 0;
 
        /* restore registers */
-       RESTORE_GPLEVEL(0); RESTORE_GPLEVEL(1);
-       RESTORE_GPLEVEL(2); RESTORE_GPLEVEL(3);
-       RESTORE(GPDR0); RESTORE(GPDR1); RESTORE(GPDR2); RESTORE(GPDR3);
        RESTORE(GAFR0_L); RESTORE(GAFR0_U);
        RESTORE(GAFR1_L); RESTORE(GAFR1_U);
        RESTORE(GAFR2_L); RESTORE(GAFR2_U);
        RESTORE(GAFR3_L); RESTORE(GAFR3_U);
-       RESTORE(GRER0); RESTORE(GRER1); RESTORE(GRER2); RESTORE(GRER3);
-       RESTORE(GFER0); RESTORE(GFER1); RESTORE(GFER2); RESTORE(GFER3);
        RESTORE(PGSR0); RESTORE(PGSR1); RESTORE(PGSR2); RESTORE(PGSR3);
 
        RESTORE(MDREFR);
@@ -412,6 +391,8 @@ static struct sys_device pxa27x_sysdev[] = {
        }, {
                .id     = 1,
                .cls    = &pxa_irq_sysclass,
+       }, {
+               .cls    = &pxa_gpio_sysclass,
        },
 };
 

diff --git a/arch/arm/mach-pxa/pxa3xx.c b/arch/arm/mach-pxa/pxa3xx.c
index 3a7e8ccd70bd26ee65101c98cf41ef8654a91092..d0b2afd4368a0f89ec076c15673996123749a210 100644 (file)
--- a/arch/arm/mach-pxa/pxa3xx.c
+++ b/arch/arm/mach-pxa/pxa3xx.c
@@ -460,6 +460,8 @@ static struct sys_device pxa3xx_sysdev[] = {
        }, {
                .id     = 1,
                .cls    = &pxa_irq_sysclass,
+       }, {
+               .cls    = &pxa_gpio_sysclass,
        },
 };