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Subject[PATCH v1 1/1] gpio: sch: Switch to memory mapped IO accessors
Date
Convert driver to use memory mapped IO accessors.

Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
---
drivers/gpio/gpio-sch.c | 25 +++++++++++++++----------
1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/drivers/gpio/gpio-sch.c b/drivers/gpio/gpio-sch.c
index e48392074e4b8..0c765558d03fc 100644
--- a/drivers/gpio/gpio-sch.c
+++ b/drivers/gpio/gpio-sch.c
@@ -38,8 +38,8 @@

struct sch_gpio {
struct gpio_chip chip;
+ void __iomem *regs;
spinlock_t lock;
- unsigned short iobase;
unsigned short resume_base;

/* GPE handling */
@@ -75,7 +75,7 @@ static int sch_gpio_reg_get(struct sch_gpio *sch, unsigned int gpio, unsigned in
offset = sch_gpio_offset(sch, gpio, reg);
bit = sch_gpio_bit(sch, gpio);

- reg_val = !!(inb(sch->iobase + offset) & BIT(bit));
+ reg_val = !!(ioread8(sch->regs + offset) & BIT(bit));

return reg_val;
}
@@ -89,12 +89,14 @@ static void sch_gpio_reg_set(struct sch_gpio *sch, unsigned int gpio, unsigned i
offset = sch_gpio_offset(sch, gpio, reg);
bit = sch_gpio_bit(sch, gpio);

- reg_val = inb(sch->iobase + offset);
+ reg_val = ioread8(sch->regs + offset);

if (val)
- outb(reg_val | BIT(bit), sch->iobase + offset);
+ reg_val |= BIT(bit);
else
- outb((reg_val & ~BIT(bit)), sch->iobase + offset);
+ reg_val &= ~BIT(bit);
+
+ iowrite8(reg_val, sch->regs + offset);
}

static int sch_gpio_direction_in(struct gpio_chip *gc, unsigned int gpio_num)
@@ -267,8 +269,8 @@ static u32 sch_gpio_gpe_handler(acpi_handle gpe_device, u32 gpe, void *context)

spin_lock_irqsave(&sch->lock, flags);

- core_status = inl(sch->iobase + CORE_BANK_OFFSET + GTS);
- resume_status = inl(sch->iobase + RESUME_BANK_OFFSET + GTS);
+ core_status = ioread32(sch->regs + CORE_BANK_OFFSET + GTS);
+ resume_status = ioread32(sch->regs + RESUME_BANK_OFFSET + GTS);

spin_unlock_irqrestore(&sch->lock, flags);

@@ -319,9 +321,11 @@ static int sch_gpio_install_gpe_handler(struct sch_gpio *sch)

static int sch_gpio_probe(struct platform_device *pdev)
{
+ struct device *dev = &pdev->dev;
struct gpio_irq_chip *girq;
struct sch_gpio *sch;
struct resource *res;
+ void __iomem *regs;
int ret;

sch = devm_kzalloc(&pdev->dev, sizeof(*sch), GFP_KERNEL);
@@ -332,12 +336,13 @@ static int sch_gpio_probe(struct platform_device *pdev)
if (!res)
return -EBUSY;

- if (!devm_request_region(&pdev->dev, res->start, resource_size(res),
- pdev->name))
+ regs = devm_ioport_map(dev, res->start, resource_size(res));
+ if (!regs)
return -EBUSY;

+ sch->regs = regs;
+
spin_lock_init(&sch->lock);
- sch->iobase = res->start;
sch->chip = sch_gpio_chip;
sch->chip.label = dev_name(&pdev->dev);
sch->chip.parent = &pdev->dev;
--
2.44.0

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