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Subject[PATCH v2 1/2] gpio-langwell: cleanup driver
Date
This patch cleans up cosmetic issues, remove useless functions and add
to_lnw_priv() macro to replace many usages of container_of().

Change-Id: I70a8fadd20a42493271d91633739bdddff19c8d8
Signed-off-by: David Cohen <david.a.cohen@intel.com>
---
drivers/gpio/gpio-langwell.c | 51 ++++++++++++++----------------------------
1 file changed, 17 insertions(+), 34 deletions(-)

diff --git a/drivers/gpio/gpio-langwell.c b/drivers/gpio/gpio-langwell.c
index 9b9d12e..2be69fe 100644
--- a/drivers/gpio/gpio-langwell.c
+++ b/drivers/gpio/gpio-langwell.c
@@ -71,10 +71,12 @@ struct lnw_gpio {
struct irq_domain *domain;
};

+#define to_lnw_priv(chip) container_of(chip, struct lnw_gpio, chip)
+
static void __iomem *gpio_reg(struct gpio_chip *chip, unsigned offset,
enum GPIO_REG reg_type)
{
- struct lnw_gpio *lnw = container_of(chip, struct lnw_gpio, chip);
+ struct lnw_gpio *lnw = to_lnw_priv(chip);
unsigned nreg = chip->ngpio / 32;
u8 reg = offset / 32;
void __iomem *ptr;
@@ -86,7 +88,7 @@ static void __iomem *gpio_reg(struct gpio_chip *chip, unsigned offset,
static void __iomem *gpio_reg_2bit(struct gpio_chip *chip, unsigned offset,
enum GPIO_REG reg_type)
{
- struct lnw_gpio *lnw = container_of(chip, struct lnw_gpio, chip);
+ struct lnw_gpio *lnw = to_lnw_priv(chip);
unsigned nreg = chip->ngpio / 32;
u8 reg = offset / 16;
void __iomem *ptr;
@@ -130,7 +132,7 @@ static void lnw_gpio_set(struct gpio_chip *chip, unsigned offset, int value)

static int lnw_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
{
- struct lnw_gpio *lnw = container_of(chip, struct lnw_gpio, chip);
+ struct lnw_gpio *lnw = to_lnw_priv(chip);
void __iomem *gpdr = gpio_reg(chip, offset, GPDR);
u32 value;
unsigned long flags;
@@ -153,7 +155,7 @@ static int lnw_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
static int lnw_gpio_direction_output(struct gpio_chip *chip,
unsigned offset, int value)
{
- struct lnw_gpio *lnw = container_of(chip, struct lnw_gpio, chip);
+ struct lnw_gpio *lnw = to_lnw_priv(chip);
void __iomem *gpdr = gpio_reg(chip, offset, GPDR);
unsigned long flags;

@@ -176,7 +178,7 @@ static int lnw_gpio_direction_output(struct gpio_chip *chip,

static int lnw_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
{
- struct lnw_gpio *lnw = container_of(chip, struct lnw_gpio, chip);
+ struct lnw_gpio *lnw = to_lnw_priv(chip);
return irq_create_mapping(lnw->domain, offset);
}

@@ -301,17 +303,6 @@ static const struct irq_domain_ops lnw_gpio_irq_ops = {
.xlate = irq_domain_xlate_twocell,
};

-#ifdef CONFIG_PM
-static int lnw_gpio_runtime_resume(struct device *dev)
-{
- return 0;
-}
-
-static int lnw_gpio_runtime_suspend(struct device *dev)
-{
- return 0;
-}
-
static int lnw_gpio_runtime_idle(struct device *dev)
{
int err = pm_schedule_suspend(dev, 500);
@@ -322,16 +313,8 @@ static int lnw_gpio_runtime_idle(struct device *dev)
return -EBUSY;
}

-#else
-#define lnw_gpio_runtime_suspend NULL
-#define lnw_gpio_runtime_resume NULL
-#define lnw_gpio_runtime_idle NULL
-#endif
-
static const struct dev_pm_ops lnw_gpio_pm_ops = {
- .runtime_suspend = lnw_gpio_runtime_suspend,
- .runtime_resume = lnw_gpio_runtime_resume,
- .runtime_idle = lnw_gpio_runtime_idle,
+ SET_RUNTIME_PM_OPS(NULL, NULL, lnw_gpio_runtime_idle)
};

static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
@@ -351,7 +334,7 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
retval = pci_request_regions(pdev, "langwell_gpio");
if (retval) {
dev_err(&pdev->dev, "error requesting resources\n");
- goto err2;
+ goto err_pci_req_region;
}
/* get the gpio_base from bar1 */
start = pci_resource_start(pdev, 1);
@@ -360,7 +343,7 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
if (!base) {
dev_err(&pdev->dev, "error mapping bar1\n");
retval = -EFAULT;
- goto err3;
+ goto err_ioremap;
}
gpio_base = *((u32 *)base + 1);
/* release the IO mapping, since we already get the info from bar1 */
@@ -372,21 +355,21 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
if (!base) {
dev_err(&pdev->dev, "error mapping bar0\n");
retval = -EFAULT;
- goto err3;
+ goto err_ioremap;
}

- lnw = devm_kzalloc(&pdev->dev, sizeof(struct lnw_gpio), GFP_KERNEL);
+ lnw = devm_kzalloc(&pdev->dev, sizeof(*lnw), GFP_KERNEL);
if (!lnw) {
dev_err(&pdev->dev, "can't allocate langwell_gpio chip data\n");
retval = -ENOMEM;
- goto err3;
+ goto err_ioremap;
}

lnw->domain = irq_domain_add_linear(pdev->dev.of_node, ngpio,
&lnw_gpio_irq_ops, lnw);
if (!lnw->domain) {
retval = -ENOMEM;
- goto err3;
+ goto err_ioremap;
}

lnw->reg_base = base;
@@ -405,7 +388,7 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
retval = gpiochip_add(&lnw->chip);
if (retval) {
dev_err(&pdev->dev, "langwell gpiochip_add error %d\n", retval);
- goto err3;
+ goto err_ioremap;
}

lnw_irq_init_hw(lnw);
@@ -420,9 +403,9 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,

return 0;

-err3:
+err_ioremap:
pci_release_regions(pdev);
-err2:
+err_pci_req_region:
pci_disable_device(pdev);
return retval;
}
--
1.7.10.4


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