mtd: nand: jz4740: Convert to GPIO descriptor API

Use the GPIO descriptor API instead of the deprecated legacy GPIO API to
manage the busy GPIO.

The patch updates both the jz4740 nand driver and the only user of the driver
the qi-lb60 board driver.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

3 files changed, 20 insertions, 22 deletions

diff --git a/arch/mips/include/asm/mach-jz4740/jz4740_nand.h b/arch/mips/include/asm/mach-jz4740/jz4740_nand.h
index 986982db7c38..79cff26d8b36 100644
--- a/arch/mips/include/asm/mach-jz4740/jz4740_nand.h
+++ b/arch/mips/include/asm/mach-jz4740/jz4740_nand.h
@@ -27,8 +27,6 @@ struct jz_nand_platform_data {
 
         struct nand_ecclayout   *ecc_layout;
 
-        unsigned int busy_gpio;
-
         unsigned char banks[JZ_NAND_NUM_BANKS];
 
         void (*ident_callback)(struct platform_device *, struct nand_chip *,
diff --git a/arch/mips/jz4740/board-qi_lb60.c b/arch/mips/jz4740/board-qi_lb60.c
index c454525e7695..9dd051edb411 100644
--- a/arch/mips/jz4740/board-qi_lb60.c
+++ b/arch/mips/jz4740/board-qi_lb60.c
@@ -140,10 +140,18 @@ static void qi_lb60_nand_ident(struct platform_device *pdev,
 
 static struct jz_nand_platform_data qi_lb60_nand_pdata = {
         .ident_callback = qi_lb60_nand_ident,
-        .busy_gpio = 94,
         .banks = { 1 },
 };
 
+static struct gpiod_lookup_table qi_lb60_nand_gpio_table = {
+        .dev_id = "jz4740-nand.0",
+        .table = {
+                GPIO_LOOKUP("Bank C", 30, "busy", 0),
+                { },
+        },
+};
+
+
 /* Keyboard*/
 
 #define KEY_QI_QI       KEY_F13
@@ -472,6 +480,7 @@ static int __init qi_lb60_init_platform_devices(void)
         jz4740_mmc_device.dev.platform_data = &qi_lb60_mmc_pdata;
 
         gpiod_add_lookup_table(&qi_lb60_audio_gpio_table);
+        gpiod_add_lookup_table(&qi_lb60_nand_gpio_table);
 
         jz4740_serial_device_register();
 
diff --git a/drivers/mtd/nand/jz4740_nand.c b/drivers/mtd/nand/jz4740_nand.c
index 1633ec9c5108..ebf2cce04cba 100644
--- a/drivers/mtd/nand/jz4740_nand.c
+++ b/drivers/mtd/nand/jz4740_nand.c
@@ -69,7 +69,7 @@ struct jz_nand {
 
         int selected_bank;
 
-        struct jz_nand_platform_data *pdata;
+        struct gpio_desc *busy_gpio;
         bool is_reading;
 };
 
@@ -131,7 +131,7 @@ static void jz_nand_cmd_ctrl(struct mtd_info *mtd, int dat, unsigned int ctrl)
 static int jz_nand_dev_ready(struct mtd_info *mtd)
 {
         struct jz_nand *nand = mtd_to_jz_nand(mtd);
-        return gpio_get_value_cansleep(nand->pdata->busy_gpio);
+        return gpiod_get_value_cansleep(nand->busy_gpio);
 }
 
 static void jz_nand_hwctl(struct mtd_info *mtd, int mode)
@@ -423,14 +423,12 @@ static int jz_nand_probe(struct platform_device *pdev)
         if (ret)
                 goto err_free;
 
-        if (pdata && gpio_is_valid(pdata->busy_gpio)) {
-                ret = gpio_request(pdata->busy_gpio, "NAND busy pin");
-                if (ret) {
-                        dev_err(&pdev->dev,
-                                "Failed to request busy gpio %d: %d\n",
-                                pdata->busy_gpio, ret);
-                        goto err_iounmap_mmio;
-                }
+        nand->busy_gpio = devm_gpiod_get_optional(&pdev->dev, "busy", GPIOD_IN);
+        if (IS_ERR(nand->busy_gpio)) {
+                ret = PTR_ERR(nand->busy_gpio);
+                dev_err(&pdev->dev, "Failed to request busy gpio %d\n",
+                    ret);
+                goto err_iounmap_mmio;
         }
 
         mtd             = &nand->mtd;
@@ -454,10 +452,9 @@ static int jz_nand_probe(struct platform_device *pdev)
         chip->cmd_ctrl = jz_nand_cmd_ctrl;
         chip->select_chip = jz_nand_select_chip;
 
-        if (pdata && gpio_is_valid(pdata->busy_gpio))
+        if (nand->busy_gpio)
                 chip->dev_ready = jz_nand_dev_ready;
 
-        nand->pdata = pdata;
         platform_set_drvdata(pdev, nand);
 
         /* We are going to autodetect NAND chips in the banks specified in the
@@ -496,7 +493,7 @@ static int jz_nand_probe(struct platform_device *pdev)
         }
         if (chipnr == 0) {
                 dev_err(&pdev->dev, "No NAND chips found\n");
-                goto err_gpio_busy;
+                goto err_iounmap_mmio;
         }
 
         if (pdata && pdata->ident_callback) {
@@ -533,9 +530,6 @@ err_unclaim_banks:
                                          nand->bank_base[bank - 1]);
         }
         writel(0, nand->base + JZ_REG_NAND_CTRL);
-err_gpio_busy:
-        if (pdata && gpio_is_valid(pdata->busy_gpio))
-                gpio_free(pdata->busy_gpio);
 err_iounmap_mmio:
         jz_nand_iounmap_resource(nand->mem, nand->base);
 err_free:
@@ -546,7 +540,6 @@ err_free:
 static int jz_nand_remove(struct platform_device *pdev)
 {
         struct jz_nand *nand = platform_get_drvdata(pdev);
-        struct jz_nand_platform_data *pdata = dev_get_platdata(&pdev->dev);
         size_t i;
 
         nand_release(&nand->mtd);
@@ -562,8 +555,6 @@ static int jz_nand_remove(struct platform_device *pdev)
                         gpio_free(JZ_GPIO_MEM_CS0 + bank - 1);
                 }
         }
-        if (pdata && gpio_is_valid(pdata->busy_gpio))
-                gpio_free(pdata->busy_gpio);
 
         jz_nand_iounmap_resource(nand->mem, nand->base);