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gpio: mt7621: Edit to preferred syntax 

This fixes some syntactic nits that makes the GPIO maintainer
happier. It is way easier to show by example and do it myself
than to try to explain it with comments. It's just my personal
taste of minimalism.

Cc: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Cc: NeilBrown <neil@brown.name>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2018-07-09 13:51:57 +02:00
parent 4ba9c3afda
commit 8512486ba2
1 changed files with 41 additions and 44 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

85
drivers/gpio/gpio-mt7621.c
View File

@ -40,18 +40,18 @@ struct mtk_gc {
};
/**
* struct mtk_data - state container for
* struct mtk - state container for
* data of the platform driver. It is 3
* separate gpio-chip each one with its
* own irq_chip.
* @dev: device instance
* @gpio_membase: memory base address
* @base: memory base address
* @gpio_irq: irq number from the device tree
* @gc_map: array of the gpio chips
*/
struct mtk_data {
struct mtk {
struct device *dev;
void __iomem *gpio_membase;
void __iomem *base;
int gpio_irq;
struct mtk_gc gc_map[MTK_BANK_CNT];
};
@ -66,20 +66,20 @@ static inline void
mtk_gpio_w32(struct mtk_gc *rg, u32 offset, u32 val)
{
struct gpio_chip *gc = &rg->chip;
struct mtk_data *gpio_data = gpiochip_get_data(gc);
struct mtk *mtk = gpiochip_get_data(gc);
offset = (rg->bank * GPIO_BANK_STRIDE) + offset;
gc->write_reg(gpio_data->gpio_membase + offset, val);
gc->write_reg(mtk->base + offset, val);
}
static inline u32
mtk_gpio_r32(struct mtk_gc *rg, u32 offset)
{
struct gpio_chip *gc = &rg->chip;
struct mtk_data *gpio_data = gpiochip_get_data(gc);
struct mtk *mtk = gpiochip_get_data(gc);
offset = (rg->bank * GPIO_BANK_STRIDE) + offset;
return gc->read_reg(gpio_data->gpio_membase + offset);
return gc->read_reg(mtk->base + offset);
}
static irqreturn_t
@ -213,80 +213,76 @@ mediatek_gpio_xlate(struct gpio_chip *chip,
}
static int
mediatek_gpio_bank_probe(struct platform_device *pdev,
mediatek_gpio_bank_probe(struct device *dev,
struct device_node *node, int bank)
{
struct mtk_data *gpio = dev_get_drvdata(&pdev->dev);
struct mtk *mtk = dev_get_drvdata(dev);
struct mtk_gc *rg;
void __iomem *dat, *set, *ctrl, *diro;
int ret;
rg = &gpio->gc_map[bank];
rg = &mtk->gc_map[bank];
memset(rg, 0, sizeof(*rg));
spin_lock_init(&rg->lock);
rg->chip.of_node = node;
rg->bank = bank;
dat = gpio->gpio_membase + GPIO_REG_DATA +
(rg->bank * GPIO_BANK_STRIDE);
set = gpio->gpio_membase + GPIO_REG_DSET +
(rg->bank * GPIO_BANK_STRIDE);
ctrl = gpio->gpio_membase + GPIO_REG_DCLR +
(rg->bank * GPIO_BANK_STRIDE);
diro = gpio->gpio_membase + GPIO_REG_CTRL +
(rg->bank * GPIO_BANK_STRIDE);
dat = mtk->base + GPIO_REG_DATA + (rg->bank * GPIO_BANK_STRIDE);
set = mtk->base + GPIO_REG_DSET + (rg->bank * GPIO_BANK_STRIDE);
ctrl = mtk->base + GPIO_REG_DCLR + (rg->bank * GPIO_BANK_STRIDE);
diro = mtk->base + GPIO_REG_CTRL + (rg->bank * GPIO_BANK_STRIDE);
ret = bgpio_init(&rg->chip, &pdev->dev, 4,
ret = bgpio_init(&rg->chip, dev, 4,
dat, set, ctrl, diro, NULL, 0);
if (ret) {
dev_err(&pdev->dev, "bgpio_init() failed\n");
dev_err(dev, "bgpio_init() failed\n");
return ret;
}
rg->chip.of_gpio_n_cells = 2;
rg->chip.of_xlate = mediatek_gpio_xlate;
rg->chip.label = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s-bank%d",
dev_name(&pdev->dev), bank);
rg->chip.label = devm_kasprintf(dev, GFP_KERNEL, "%s-bank%d",
dev_name(dev), bank);
ret = devm_gpiochip_add_data(&pdev->dev, &rg->chip, gpio);
ret = devm_gpiochip_add_data(dev, &rg->chip, mtk);
if (ret < 0) {
dev_err(&pdev->dev, "Could not register gpio %d, ret=%d\n",
dev_err(dev, "Could not register gpio %d, ret=%d\n",
rg->chip.ngpio, ret);
return ret;
}
if (gpio->gpio_irq) {
if (mtk->gpio_irq) {
/*
* Manually request the irq here instead of passing
* a flow-handler to gpiochip_set_chained_irqchip,
* because the irq is shared.
*/
ret = devm_request_irq(&pdev->dev, gpio->gpio_irq,
ret = devm_request_irq(dev, mtk->gpio_irq,
mediatek_gpio_irq_handler, IRQF_SHARED,
rg->chip.label, &rg->chip);
if (ret) {
dev_err(&pdev->dev, "Error requesting IRQ %d: %d\n",
gpio->gpio_irq, ret);
dev_err(dev, "Error requesting IRQ %d: %d\n",
mtk->gpio_irq, ret);
return ret;
}
ret = gpiochip_irqchip_add(&rg->chip, &mediatek_gpio_irq_chip,
0, handle_simple_irq, IRQ_TYPE_NONE);
if (ret) {
dev_err(&pdev->dev, "failed to add gpiochip_irqchip\n");
dev_err(dev, "failed to add gpiochip_irqchip\n");
return ret;
}
gpiochip_set_chained_irqchip(&rg->chip, &mediatek_gpio_irq_chip,
gpio->gpio_irq, NULL);
mtk->gpio_irq, NULL);
}
/* set polarity to low for all gpios */
mtk_gpio_w32(rg, GPIO_REG_POL, 0);
dev_info(&pdev->dev, "registering %d gpios\n", rg->chip.ngpio);
dev_info(dev, "registering %d gpios\n", rg->chip.ngpio);
return 0;
}
@ -294,26 +290,27 @@ mediatek_gpio_bank_probe(struct platform_device *pdev,
static int
mediatek_gpio_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
struct mtk_data *gpio_data;
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct mtk *mtk;
int i;
gpio_data = devm_kzalloc(&pdev->dev, sizeof(*gpio_data), GFP_KERNEL);
if (!gpio_data)
mtk = devm_kzalloc(dev, sizeof(*mtk), GFP_KERNEL);
if (!mtk)
return -ENOMEM;
gpio_data->gpio_membase = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(gpio_data->gpio_membase))
return PTR_ERR(gpio_data->gpio_membase);
mtk->base = devm_ioremap_resource(dev, res);
if (IS_ERR(mtk->base))
return PTR_ERR(mtk->base);
gpio_data->gpio_irq = irq_of_parse_and_map(np, 0);
gpio_data->dev = &pdev->dev;
platform_set_drvdata(pdev, gpio_data);
mediatek_gpio_irq_chip.name = dev_name(&pdev->dev);
mtk->gpio_irq = irq_of_parse_and_map(np, 0);
mtk->dev = dev;
platform_set_drvdata(pdev, mtk);
mediatek_gpio_irq_chip.name = dev_name(dev);
for (i = 0; i < MTK_BANK_CNT; i++)
mediatek_gpio_bank_probe(pdev, np, i);
mediatek_gpio_bank_probe(dev, np, i);
return 0;
}