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dm: gpio: imx: Drop request()/free() in the driver

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Now that the uclass supports gpio_request/free() there is no need for the
driver to implement it too. Drop this unnecessary code.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2014-10-04 11:29:56 -06:00
parent 6227fb87c4
commit c65dd445c9
1 changed files with 0 additions and 116 deletions
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116
drivers/gpio/mxc_gpio.c
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@ -20,7 +20,6 @@ enum mxc_gpio_direction {
MXC_GPIO_DIRECTION_OUT,
};
#define GPIO_NAME_SIZE 20
#define GPIO_PER_BANK 32
struct mxc_gpio_plat {
@ -28,7 +27,6 @@ struct mxc_gpio_plat {
};
struct mxc_bank_info {
char label[GPIO_PER_BANK][GPIO_NAME_SIZE];
struct gpio_regs *regs;
};
@ -152,18 +150,6 @@ int gpio_direction_output(unsigned gpio, int value)
#endif
#ifdef CONFIG_DM_GPIO
/**
* gpio_is_requested() - check if a GPIO has been requested
*
* @bank: Bank to check
* @offset: GPIO offset within bank to check
* @return true if marked as requested, false if not
*/
static inline bool gpio_is_requested(struct mxc_bank_info *bank, int offset)
{
return *bank->label[offset] != '\0';
}
static int mxc_gpio_is_output(struct gpio_regs *regs, int offset)
{
u32 val;
@ -208,35 +194,10 @@ static int mxc_gpio_bank_get_value(struct gpio_regs *regs, int offset)
return (readl(&regs->gpio_psr) >> offset) & 0x01;
}
static int mxc_gpio_bank_get_output_value(struct gpio_regs *regs, int offset)
{
return (readl(&regs->gpio_dr) >> offset) & 0x01;
}
static int check_requested(struct udevice *dev, unsigned offset,
const char *func)
{
struct mxc_bank_info *bank = dev_get_priv(dev);
struct gpio_dev_priv *uc_priv = dev->uclass_priv;
if (!gpio_is_requested(bank, offset)) {
printf("mxc_gpio: %s: error: gpio %s%d not requested\n",
func, uc_priv->bank_name, offset);
return -EPERM;
}
return 0;
}
/* set GPIO pin 'gpio' as an input */
static int mxc_gpio_direction_input(struct udevice *dev, unsigned offset)
{
struct mxc_bank_info *bank = dev_get_priv(dev);
int ret;
ret = check_requested(dev, offset, __func__);
if (ret)
return ret;
/* Configure GPIO direction as input. */
mxc_gpio_bank_direction(bank->regs, offset, MXC_GPIO_DIRECTION_IN);
@ -249,11 +210,6 @@ static int mxc_gpio_direction_output(struct udevice *dev, unsigned offset,
int value)
{
struct mxc_bank_info *bank = dev_get_priv(dev);
int ret;
ret = check_requested(dev, offset, __func__);
if (ret)
return ret;
/* Configure GPIO output value. */
mxc_gpio_bank_set_value(bank->regs, offset, value);
@ -268,11 +224,6 @@ static int mxc_gpio_direction_output(struct udevice *dev, unsigned offset,
static int mxc_gpio_get_value(struct udevice *dev, unsigned offset)
{
struct mxc_bank_info *bank = dev_get_priv(dev);
int ret;
ret = check_requested(dev, offset, __func__);
if (ret)
return ret;
return mxc_gpio_bank_get_value(bank->regs, offset);
}
@ -282,80 +233,16 @@ static int mxc_gpio_set_value(struct udevice *dev, unsigned offset,
int value)
{
struct mxc_bank_info *bank = dev_get_priv(dev);
int ret;
ret = check_requested(dev, offset, __func__);
if (ret)
return ret;
mxc_gpio_bank_set_value(bank->regs, offset, value);
return 0;
}
static int mxc_gpio_get_state(struct udevice *dev, unsigned int offset,
char *buf, int bufsize)
{
struct gpio_dev_priv *uc_priv = dev->uclass_priv;
struct mxc_bank_info *bank = dev_get_priv(dev);
const char *label;
bool requested;
bool is_output;
int size;
label = bank->label[offset];
is_output = mxc_gpio_is_output(bank->regs, offset);
size = snprintf(buf, bufsize, "%s%d: ",
uc_priv->bank_name ? uc_priv->bank_name : "", offset);
buf += size;
bufsize -= size;
requested = gpio_is_requested(bank, offset);
snprintf(buf, bufsize, "%s: %d [%c]%s%s",
is_output ? "out" : " in",
is_output ?
mxc_gpio_bank_get_output_value(bank->regs, offset) :
mxc_gpio_bank_get_value(bank->regs, offset),
requested ? 'x' : ' ',
requested ? " " : "",
label);
return 0;
}
static int mxc_gpio_request(struct udevice *dev, unsigned offset,
const char *label)
{
struct mxc_bank_info *bank = dev_get_priv(dev);
if (gpio_is_requested(bank, offset))
return -EBUSY;
strncpy(bank->label[offset], label, GPIO_NAME_SIZE);
bank->label[offset][GPIO_NAME_SIZE - 1] = '\0';
return 0;
}
static int mxc_gpio_free(struct udevice *dev, unsigned offset)
{
struct mxc_bank_info *bank = dev_get_priv(dev);
int ret;
ret = check_requested(dev, offset, __func__);
if (ret)
return ret;
bank->label[offset][0] = '\0';
return 0;
}
static int mxc_gpio_get_function(struct udevice *dev, unsigned offset)
{
struct mxc_bank_info *bank = dev_get_priv(dev);
if (!gpio_is_requested(bank, offset))
return GPIOF_UNUSED;
/* GPIOF_FUNC is not implemented yet */
if (mxc_gpio_is_output(bank->regs, offset))
return GPIOF_OUTPUT;
@ -364,14 +251,11 @@ static int mxc_gpio_get_function(struct udevice *dev, unsigned offset)
}
static const struct dm_gpio_ops gpio_mxc_ops = {
.request = mxc_gpio_request,
.free = mxc_gpio_free,
.direction_input = mxc_gpio_direction_input,
.direction_output = mxc_gpio_direction_output,
.get_value = mxc_gpio_get_value,
.set_value = mxc_gpio_set_value,
.get_function = mxc_gpio_get_function,
.get_state = mxc_gpio_get_state,
};
static const struct mxc_gpio_plat mxc_plat[] = {