[xburst] Export gpio and irq registers through debugfs

[openwrt/svn-archive/archive.git] / target / linux / xburst / files-2.6.32 / arch / mips / jz4740 / gpio.c

diff --git a/target/linux/xburst/files-2.6.32/arch/mips/jz4740/gpio.c b/target/linux/xburst/files-2.6.32/arch/mips/jz4740/gpio.c
index 60d605384045a9160a5cc7ba3b52d21f735de275..ccaa0602a95587c3e140b76f1c32571ba122b46c 100644 (file)
--- a/target/linux/xburst/files-2.6.32/arch/mips/jz4740/gpio.c
+++ b/target/linux/xburst/files-2.6.32/arch/mips/jz4740/gpio.c
@@ -25,6 +25,9 @@
 #include <linux/interrupt.h>
 #include <linux/bitops.h>
 
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
 #define JZ_GPIO_BASE_A (32*0)
 #define JZ_GPIO_BASE_B (32*1)
 #define JZ_GPIO_BASE_C (32*2)
@@ -301,6 +304,7 @@ static void jz_gpio_irq_unmask(unsigned int irq)
        jz_gpio_set_irq_bit(irq, JZ_REG_GPIO_MASK_CLEAR);
 };
 
+
 /* TODO: Check if function is gpio */
 static unsigned int jz_gpio_irq_startup(unsigned int irq)
 {
@@ -445,18 +449,6 @@ int jz_gpio_suspend(void)
        }
 
        chip = jz_gpio_chips;
-#if 0
-       for (i = 0; i < ARRAY_SIZE(jz_gpio_chips); ++i, ++chip) {
-               printk("GPIO %d: \n", i);
-               printk("\tPin: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_PIN)));
-               printk("\tData: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_DATA)));
-               printk("\tPull: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_PULL)));
-               printk("\tFunc: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_FUNC)));
-               printk("\tSelect: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_SELECT)));
-               printk("\tDirection: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_DIRECTION)));
-               printk("\tTrigger: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_TRIGGER)));
-       }
-#endif
 
        return 0;
 }
@@ -465,6 +457,7 @@ int jz_gpio_resume(void)
 {
        struct jz_gpio_chip *chip = jz_gpio_chips;
        int i;
+
        for (i = 0; i < ARRAY_SIZE(jz_gpio_chips); ++i, ++chip) {
                writel(~(chip->suspend_mask), GPIO_TO_REG(chip->gpio_chip.base, JZ_REG_GPIO_MASK_CLEAR));
        }
@@ -495,3 +488,49 @@ int __init jz_gpiolib_init(void)
 
        return 0;
 }
+
+#ifdef CONFIG_DEBUG_FS
+
+static int gpio_regs_show(struct seq_file *s, void *unused)
+{
+       struct jz_gpio_chip *chip = jz_gpio_chips;
+       int i;
+
+       for (i = 0; i < ARRAY_SIZE(jz_gpio_chips); ++i, ++chip) {
+               seq_printf(s, "GPIO %d: \n", i);
+               seq_printf(s, "\tPin: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_PIN)));
+               seq_printf(s, "\tData: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_DATA)));
+               seq_printf(s, "\tMask: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_MASK)));
+               seq_printf(s, "\tData: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_DATA)));
+               seq_printf(s, "\tPull: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_PULL)));
+               seq_printf(s, "\tFunc: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_FUNC)));
+               seq_printf(s, "\tSelect: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_SELECT)));
+               seq_printf(s, "\tDirection: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_DIRECTION)));
+               seq_printf(s, "\tTrigger: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_TRIGGER)));
+               seq_printf(s, "\tFlag: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_FLAG)));
+       }
+
+       return 0;
+}
+
+static int gpio_regs_open(struct inode *inode, struct file *file)
+{
+       return single_open(file, gpio_regs_show, NULL);
+}
+
+static const struct file_operations gpio_regs_operations = {
+       .open           = gpio_regs_open,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = single_release,
+};
+
+static int __init gpio_debugfs_init(void)
+{
+       (void) debugfs_create_file("jz_regs_gpio", S_IFREG | S_IRUGO,
+                               NULL, NULL, &gpio_regs_operations);
+       return 0;
+}
+subsys_initcall(gpio_debugfs_init);
+
+#endif