diff options
Diffstat (limited to 'drivers/gpio/gpio-vt8500.c')
| -rw-r--r-- | drivers/gpio/gpio-vt8500.c | 65 |
1 files changed, 51 insertions, 14 deletions
diff --git a/drivers/gpio/gpio-vt8500.c b/drivers/gpio/gpio-vt8500.c index b53320a16fc8..81683ca35ac1 100644 --- a/drivers/gpio/gpio-vt8500.c +++ b/drivers/gpio/gpio-vt8500.c @@ -73,19 +73,20 @@ struct vt8500_gpio_data { static struct vt8500_gpio_data vt8500_data = { .num_banks = 7, .banks = { + VT8500_BANK(NO_REG, 0x3C, 0x5C, 0x7C, 9), VT8500_BANK(0x00, 0x20, 0x40, 0x60, 26), VT8500_BANK(0x04, 0x24, 0x44, 0x64, 28), VT8500_BANK(0x08, 0x28, 0x48, 0x68, 31), VT8500_BANK(0x0C, 0x2C, 0x4C, 0x6C, 19), VT8500_BANK(0x10, 0x30, 0x50, 0x70, 19), VT8500_BANK(0x14, 0x34, 0x54, 0x74, 23), - VT8500_BANK(NO_REG, 0x3C, 0x5C, 0x7C, 9), }, }; static struct vt8500_gpio_data wm8505_data = { .num_banks = 10, .banks = { + VT8500_BANK(0x64, 0x8C, 0xB4, 0xDC, 22), VT8500_BANK(0x40, 0x68, 0x90, 0xB8, 8), VT8500_BANK(0x44, 0x6C, 0x94, 0xBC, 32), VT8500_BANK(0x48, 0x70, 0x98, 0xC0, 6), @@ -95,7 +96,6 @@ static struct vt8500_gpio_data wm8505_data = { VT8500_BANK(0x58, 0x80, 0xA8, 0xD0, 5), VT8500_BANK(0x5C, 0x84, 0xAC, 0xD4, 12), VT8500_BANK(0x60, 0x88, 0xB0, 0xD8, 16), - VT8500_BANK(0x64, 0x8C, 0xB4, 0xDC, 22), VT8500_BANK(0x500, 0x504, 0x508, 0x50C, 6), }, }; @@ -127,6 +127,12 @@ struct vt8500_gpio_chip { void __iomem *base; }; +struct vt8500_data { + struct vt8500_gpio_chip *chip; + void __iomem *iobase; + int num_banks; +}; + #define to_vt8500(__chip) container_of(__chip, struct vt8500_gpio_chip, chip) @@ -224,19 +230,32 @@ static int vt8500_of_xlate(struct gpio_chip *gc, static int vt8500_add_chips(struct platform_device *pdev, void __iomem *base, const struct vt8500_gpio_data *data) { + struct vt8500_data *priv; struct vt8500_gpio_chip *vtchip; struct gpio_chip *chip; int i; int pin_cnt = 0; - vtchip = devm_kzalloc(&pdev->dev, + priv = devm_kzalloc(&pdev->dev, sizeof(struct vt8500_data), GFP_KERNEL); + if (!priv) { + dev_err(&pdev->dev, "failed to allocate memory\n"); + return -ENOMEM; + } + + priv->chip = devm_kzalloc(&pdev->dev, sizeof(struct vt8500_gpio_chip) * data->num_banks, GFP_KERNEL); - if (!vtchip) { - pr_err("%s: failed to allocate chip memory\n", __func__); + if (!priv->chip) { + dev_err(&pdev->dev, "failed to allocate chip memory\n"); return -ENOMEM; } + priv->iobase = base; + priv->num_banks = data->num_banks; + platform_set_drvdata(pdev, priv); + + vtchip = priv->chip; + for (i = 0; i < data->num_banks; i++) { vtchip[i].base = base; vtchip[i].regs = &data->banks[i]; @@ -273,36 +292,54 @@ static struct of_device_id vt8500_gpio_dt_ids[] = { static int vt8500_gpio_probe(struct platform_device *pdev) { + int ret; void __iomem *gpio_base; - struct device_node *np; + struct resource *res; const struct of_device_id *of_id = of_match_device(vt8500_gpio_dt_ids, &pdev->dev); if (!of_id) { - dev_err(&pdev->dev, "Failed to find gpio controller\n"); + dev_err(&pdev->dev, "No matching driver data\n"); return -ENODEV; } - np = pdev->dev.of_node; - if (!np) { - dev_err(&pdev->dev, "Missing GPIO description in devicetree\n"); - return -EFAULT; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "Unable to get IO resource\n"); + return -ENODEV; } - gpio_base = of_iomap(np, 0); + gpio_base = devm_request_and_ioremap(&pdev->dev, res); if (!gpio_base) { dev_err(&pdev->dev, "Unable to map GPIO registers\n"); - of_node_put(np); return -ENOMEM; } - vt8500_add_chips(pdev, gpio_base, of_id->data); + ret = vt8500_add_chips(pdev, gpio_base, of_id->data); + + return ret; +} + +static int vt8500_gpio_remove(struct platform_device *pdev) +{ + int i; + int ret; + struct vt8500_data *priv = platform_get_drvdata(pdev); + struct vt8500_gpio_chip *vtchip = priv->chip; + + for (i = 0; i < priv->num_banks; i++) { + ret = gpiochip_remove(&vtchip[i].chip); + if (ret) + dev_warn(&pdev->dev, "gpiochip_remove returned %d\n", + ret); + } return 0; } static struct platform_driver vt8500_gpio_driver = { .probe = vt8500_gpio_probe, + .remove = vt8500_gpio_remove, .driver = { .name = "vt8500-gpio", .owner = THIS_MODULE, |