ata: rb532_cf: Convert to use GPIO descriptors

Pass a GPIO descriptor for the device instead of a hardcoded
GPIO number from the global GPIO numberspace. Use gpio
descriptors throughout.

Cut the now completely unused platform data for the CF slot.

Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Waldemar Brodkorb <wbx@openadk.org>
Cc: Matt Redfearn <matt.redfearn@mips.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

3 files changed, 19 insertions, 44 deletions

diff --git a/arch/mips/include/asm/mach-rc32434/rb.h b/arch/mips/include/asm/mach-rc32434/rb.h
index aac8ce8902e7..5dfd4d66d6fc 100644
--- a/arch/mips/include/asm/mach-rc32434/rb.h
+++ b/arch/mips/include/asm/mach-rc32434/rb.h
@@ -71,12 +71,6 @@ struct korina_device {
         struct net_device *dev;
 };
 
-struct cf_device {
-        int gpio_pin;
-        void *dev;
-        struct gendisk *gd;
-};
-
 struct mpmc_device {
         unsigned char   state;
         spinlock_t      lock;
diff --git a/arch/mips/rb532/devices.c b/arch/mips/rb532/devices.c
index 2b23ad640f39..828d8cc3a5df 100644
--- a/arch/mips/rb532/devices.c
+++ b/arch/mips/rb532/devices.c
@@ -23,6 +23,7 @@
 #include <linux/mtd/platnand.h>
 #include <linux/mtd/mtd.h>
 #include <linux/gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/gpio_keys.h>
 #include <linux/input.h>
 #include <linux/serial_8250.h>
@@ -127,14 +128,18 @@ static struct resource cf_slot0_res[] = {
         }
 };
 
-static struct cf_device cf_slot0_data = {
-        .gpio_pin = CF_GPIO_NUM
+static struct gpiod_lookup_table cf_slot0_gpio_table = {
+        .dev_id = "pata-rb532-cf",
+        .table = {
+                GPIO_LOOKUP("gpio0", CF_GPIO_NUM,
+                            NULL, GPIO_ACTIVE_HIGH),
+                { },
+        },
 };
 
 static struct platform_device cf_slot0 = {
         .id = -1,
         .name = "pata-rb532-cf",
-        .dev.platform_data = &cf_slot0_data,
         .resource = cf_slot0_res,
         .num_resources = ARRAY_SIZE(cf_slot0_res),
 };
@@ -305,6 +310,7 @@ static int __init plat_setup_devices(void)
 
         dev_set_drvdata(&korina_dev0.dev, &korina_dev0_data);
 
+        gpiod_add_lookup_table(&cf_slot0_gpio_table);
         return platform_add_devices(rb532_devs, ARRAY_SIZE(rb532_devs));
 }
 
diff --git a/drivers/ata/pata_rb532_cf.c b/drivers/ata/pata_rb532_cf.c
index 653b9a0bf727..66bb5bff126b 100644
--- a/drivers/ata/pata_rb532_cf.c
+++ b/drivers/ata/pata_rb532_cf.c
@@ -27,7 +27,7 @@
 #include <linux/io.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 
 #include <linux/libata.h>
 #include <scsi/scsi_host.h>
@@ -49,7 +49,7 @@
 
 struct rb532_cf_info {
         void __iomem    *iobase;
-        unsigned int    gpio_line;
+        struct gpio_desc *gpio_line;
         unsigned int    irq;
 };
 
@@ -60,7 +60,7 @@ static irqreturn_t rb532_pata_irq_handler(int irq, void *dev_instance)
         struct ata_host *ah = dev_instance;
         struct rb532_cf_info *info = ah->private_data;
 
-        if (gpio_get_value(info->gpio_line)) {
+        if (gpiod_get_value(info->gpio_line)) {
                 irq_set_irq_type(info->irq, IRQ_TYPE_LEVEL_LOW);
                 ata_sff_interrupt(info->irq, dev_instance);
         } else {
@@ -106,10 +106,9 @@ static void rb532_pata_setup_ports(struct ata_host *ah)
 static int rb532_pata_driver_probe(struct platform_device *pdev)
 {
         int irq;
-        int gpio;
+        struct gpio_desc *gpiod;
         struct resource *res;
         struct ata_host *ah;
-        struct cf_device *pdata;
         struct rb532_cf_info *info;
         int ret;
 
@@ -125,23 +124,12 @@ static int rb532_pata_driver_probe(struct platform_device *pdev)
                 return -ENOENT;
         }
 
-        pdata = dev_get_platdata(&pdev->dev);
-        if (!pdata) {
-                dev_err(&pdev->dev, "no platform data specified\n");
-                return -EINVAL;
-        }
-
-        gpio = pdata->gpio_pin;
-        if (gpio < 0) {
+        gpiod = devm_gpiod_get(&pdev->dev, NULL, GPIOD_IN);
+        if (IS_ERR(gpiod)) {
                 dev_err(&pdev->dev, "no GPIO found for irq%d\n", irq);
-                return -ENOENT;
-        }
-
-        ret = gpio_request(gpio, DRV_NAME);
-        if (ret) {
-                dev_err(&pdev->dev, "GPIO request failed\n");
-                return ret;
+                return PTR_ERR(gpiod);
         }
+        gpiod_set_consumer_name(gpiod, DRV_NAME);
 
         /* allocate host */
         ah = ata_host_alloc(&pdev->dev, RB500_CF_MAXPORTS);
@@ -153,7 +141,7 @@ static int rb532_pata_driver_probe(struct platform_device *pdev)
                 return -ENOMEM;
 
         ah->private_data = info;
-        info->gpio_line = gpio;
+        info->gpio_line = gpiod;
         info->irq = irq;
 
         info->iobase = devm_ioremap_nocache(&pdev->dev, res->start,
@@ -161,26 +149,14 @@ static int rb532_pata_driver_probe(struct platform_device *pdev)
         if (!info->iobase)
                 return -ENOMEM;
 
-        ret = gpio_direction_input(gpio);
-        if (ret) {
-                dev_err(&pdev->dev, "unable to set GPIO direction, err=%d\n",
-                                ret);
-                goto err_free_gpio;
-        }
-
         rb532_pata_setup_ports(ah);
 
         ret = ata_host_activate(ah, irq, rb532_pata_irq_handler,
                                 IRQF_TRIGGER_LOW, &rb532_pata_sht);
         if (ret)
-                goto err_free_gpio;
+                return ret;
 
         return 0;
-
-err_free_gpio:
-        gpio_free(gpio);
-
-        return ret;
 }
 
 static int rb532_pata_driver_remove(struct platform_device *pdev)
@@ -189,7 +165,6 @@ static int rb532_pata_driver_remove(struct platform_device *pdev)
         struct rb532_cf_info *info = ah->private_data;
 
         ata_host_detach(ah);
-        gpio_free(info->gpio_line);
 
         return 0;
 }