[ARM] 5510/1: U300 GPIO debug and init fixes

This moves the GPIO driver away from using __devinit and __devexit
It also removes all printk() in favor of using dev_* print macros
on pdev->dev struct instead. Surplus prints are removed, and the
platform_device_probe() function is used instead of putting a
.probe function in the platform driver struct.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mach-u300/gpio.c b/arch/arm/mach-u300/gpio.c
index 2d5ae8e..308cdb1 100644 (file)
--- a/arch/arm/mach-u300/gpio.c
+++ b/arch/arm/mach-u300/gpio.c
@@ -36,6 +36,7 @@ static struct clk *clk;
 /* Memory resource */
 static struct resource *memres;
 static void __iomem *virtbase;
+static struct device *gpiodev;
 
 struct u300_gpio_port {
        const char *name;
@@ -264,8 +265,8 @@ static struct gpio_struct gpio_pin[U300_GPIO_MAX];
 int gpio_register_callback(unsigned gpio, int (*func)(void *arg), void *data)
 {
        if (gpio_pin[gpio].callback)
-               printk(KERN_WARNING "GPIO: %s: WARNING: callback already " \
-                      "registered for gpio pin#%d\n", __func__, gpio);
+               dev_warn(gpiodev, "%s: WARNING: callback already "
+                        "registered for gpio pin#%d\n", __func__, gpio);
        gpio_pin[gpio].callback = func;
        gpio_pin[gpio].data = data;
 
@@ -276,8 +277,8 @@ EXPORT_SYMBOL(gpio_register_callback);
 int gpio_unregister_callback(unsigned gpio)
 {
        if (!gpio_pin[gpio].callback)
-               printk(KERN_WARNING "GPIO: %s: WARNING: callback already " \
-                      "unregistered for gpio pin#%d\n", __func__, gpio);
+               dev_warn(gpiodev, "%s: WARNING: callback already "
+                        "unregistered for gpio pin#%d\n", __func__, gpio);
        gpio_pin[gpio].callback = NULL;
        gpio_pin[gpio].data = NULL;
 
@@ -303,8 +304,8 @@ void gpio_free(unsigned gpio)
        gpio_users--;
        gpio_pin[gpio].users--;
        if (unlikely(gpio_pin[gpio].users < 0)) {
-               printk(KERN_WARNING "GPIO: Warning: gpio#%d release mismatch\n",
-                               gpio);
+               dev_warn(gpiodev, "warning: gpio#%d release mismatch\n",
+                        gpio);
                gpio_pin[gpio].users = 0;
        }
 
@@ -492,7 +493,7 @@ static irqreturn_t gpio_irq_handler(int irq, void *dev_id)
                if (gpio_pin[gpio].callback)
                        (void)gpio_pin[gpio].callback(gpio_pin[gpio].data);
                else
-                       printk(KERN_DEBUG "GPIO: Stray GPIO IRQ on line %d\n",
+                       dev_dbg(gpiodev, "stray GPIO IRQ on line %d\n",
                               gpio);
        }
        return IRQ_HANDLED;
@@ -548,25 +549,26 @@ static void gpio_set_initial_values(void)
 #endif
 }
 
-static int __devinit gpio_probe(struct platform_device *pdev)
+static int __init gpio_probe(struct platform_device *pdev)
 {
        u32 val;
        int err = 0;
        int i;
        int num_irqs;
 
+       gpiodev = &pdev->dev;
        memset(gpio_pin, 0, sizeof(gpio_pin));
 
        /* Get GPIO clock */
        clk = clk_get(&pdev->dev, NULL);
        if (IS_ERR(clk)) {
                err = PTR_ERR(clk);
-               printk(KERN_ERR "GPIO: could not get GPIO clock\n");
+               dev_err(gpiodev, "could not get GPIO clock\n");
                goto err_no_clk;
        }
        err = clk_enable(clk);
        if (err) {
-               printk(KERN_ERR "GPIO: could not enable GPIO clock\n");
+               dev_err(gpiodev, "could not enable GPIO clock\n");
                goto err_no_clk_enable;
        }
 
@@ -580,22 +582,24 @@ static int __devinit gpio_probe(struct platform_device *pdev)
                goto err_no_ioregion;
        }
 
-       virtbase = ioremap(memres->start, memres->end - memres->start + 1);
+       virtbase = ioremap(memres->start, resource_size(memres));
        if (!virtbase) {
                err = -ENOMEM;
                goto err_no_ioremap;
        }
+       dev_info(gpiodev, "remapped 0x%08x to %p\n",
+                memres->start, virtbase);
 
 #ifdef U300_COH901335
-       printk(KERN_INFO "GPIO: Initializing GPIO Controller COH 901 335\n");
+       dev_info(gpiodev, "initializing GPIO Controller COH 901 335\n");
        /* Turn on the GPIO block */
        writel(U300_GPIO_CR_BLOCK_CLOCK_ENABLE, virtbase + U300_GPIO_CR);
 #endif
 
 #ifdef U300_COH901571_3
-       printk(KERN_INFO "GPIO: Initializing GPIO Controller COH 901 571/3\n");
+       dev_info(gpiodev, "initializing GPIO Controller COH 901 571/3\n");
        val = readl(virtbase + U300_GPIO_CR);
-       printk(KERN_INFO "GPIO: COH901571/3 block version: %d, " \
+       dev_info(gpiodev, "COH901571/3 block version: %d, " \
               "number of cores: %d\n",
               ((val & 0x0000FE00) >> 9),
               ((val & 0x000001FC) >> 2));
@@ -623,15 +627,14 @@ static int __devinit gpio_probe(struct platform_device *pdev)
                                  gpio_ports[num_irqs].name,
                                  &gpio_ports[num_irqs]);
                if (err) {
-                       printk(KERN_CRIT "GPIO: Cannot allocate IRQ for %s!\n",
-                              gpio_ports[num_irqs].name);
+                       dev_err(gpiodev, "cannot allocate IRQ for %s!\n",
+                               gpio_ports[num_irqs].name);
                        goto err_no_irq;
                }
                /* Turns off PortX_irq_force */
                writel(0x0, virtbase + U300_GPIO_PXIFR +
                                 num_irqs * U300_GPIO_PORTX_SPACING);
        }
-       printk(KERN_INFO "GPIO: U300 gpio module loaded\n");
 
        return 0;
 
@@ -647,11 +650,11 @@ static int __devinit gpio_probe(struct platform_device *pdev)
  err_no_clk_enable:
        clk_put(clk);
  err_no_clk:
-       printk(KERN_INFO "GPIO: module ERROR:%d\n", err);
+       dev_info(gpiodev, "module ERROR:%d\n", err);
        return err;
 }
 
-static int __devexit gpio_remove(struct platform_device *pdev)
+static int __exit gpio_remove(struct platform_device *pdev)
 {
        int i;
 
@@ -670,14 +673,13 @@ static struct platform_driver gpio_driver = {
        .driver         = {
                .name   = "u300-gpio",
        },
-       .probe          = gpio_probe,
-       .remove         = __devexit_p(gpio_remove),
+       .remove         = __exit_p(gpio_remove),
 };
 
 
 static int __init u300_gpio_init(void)
 {
-       return platform_driver_register(&gpio_driver);
+       return platform_driver_probe(&gpio_driver, gpio_probe);
 }
 
 static void __exit u300_gpio_exit(void)