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pinctrl: abx500: fix abx500_gpio_dbg_show_one() to show pull up/down 

- rework abx500_gpio_dbg_show_one() to take in account pull up/down
  feature available on AB8540 only.
- add abx500_get_pull_updown() needed by abx500_gpio_dbg_show_one()
- rename abx500_config_pull_updown() to abx500_set_pull_updown()

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Patrice Chotard 2013-05-24 14:06:31 +02:00 committed by Linus Walleij
parent 9ed3cd3338
commit d2752ae54d
1 changed files with 71 additions and 17 deletions
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88
drivers/pinctrl/pinctrl-abx500.c
View File

@ -181,8 +181,44 @@ static void abx500_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
dev_err(pct->dev, "%s write failed\n", __func__);
}
static int abx500_config_pull_updown(struct abx500_pinctrl *pct,
int offset, enum abx500_gpio_pull_updown val)
static int abx500_get_pull_updown(struct abx500_pinctrl *pct, int offset,
enum abx500_gpio_pull_updown *pull_updown)
{
u8 pos;
u8 val;
int ret;
struct pullud *pullud;
if (!pct->soc->pullud) {
dev_err(pct->dev, "%s AB chip doesn't support pull up/down feature",
__func__);
ret = -EPERM;
goto out;
}
pullud = pct->soc->pullud;
if ((offset < pullud->first_pin)
|| (offset > pullud->last_pin)) {
ret = -EINVAL;
goto out;
}
ret = abx500_get_register_interruptible(pct->dev,
AB8500_MISC, AB8540_GPIO_PULL_UPDOWN_REG, &val);
pos = (offset - pullud->first_pin) << 1;
*pull_updown = (val >> pos) & AB8540_GPIO_PULL_UPDOWN_MASK;
out:
if (ret < 0)
dev_err(pct->dev, "%s failed (%d)\n", __func__, ret);
return ret;
}
static int abx500_set_pull_updown(struct abx500_pinctrl *pct,
int offset, enum abx500_gpio_pull_updown val)
{
u8 pos;
int ret;
@ -202,7 +238,6 @@ static int abx500_config_pull_updown(struct abx500_pinctrl *pct,
ret = -EINVAL;
goto out;
}
pos = (offset - pullud->first_pin) << 1;
ret = abx500_mask_and_set_register_interruptible(pct->dev,
@ -238,7 +273,7 @@ static int abx500_gpio_direction_output(struct gpio_chip *chip,
/* if supported, disable both pull down and pull up */
gpio = offset + 1;
if (pullud && gpio >= pullud->first_pin && gpio <= pullud->last_pin) {
ret = abx500_config_pull_updown(pct,
ret = abx500_set_pull_updown(pct,
gpio,
ABX500_GPIO_PULL_NONE);
if (ret < 0)
@ -462,11 +497,14 @@ static void abx500_gpio_dbg_show_one(struct seq_file *s,
struct gpio_chip *chip,
unsigned offset, unsigned gpio)
{
struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
struct pullud *pullud = pct->soc->pullud;
const char *label = gpiochip_is_requested(chip, offset - 1);
u8 gpio_offset = offset - 1;
int mode = -1;
bool is_out;
bool pull;
bool pd;
enum abx500_gpio_pull_updown pud;
const char *modes[] = {
[ABX500_DEFAULT] = "default",
@ -475,21 +513,37 @@ static void abx500_gpio_dbg_show_one(struct seq_file *s,
[ABX500_ALT_C] = "altC",
};
const char *pull_up_down[] = {
[ABX500_GPIO_PULL_DOWN] = "pull down",
[ABX500_GPIO_PULL_NONE] = "pull none",
[ABX500_GPIO_PULL_NONE + 1] = "pull none",
[ABX500_GPIO_PULL_UP] = "pull up",
};
abx500_gpio_get_bit(chip, AB8500_GPIO_DIR1_REG, gpio_offset, &is_out);
abx500_gpio_get_bit(chip, AB8500_GPIO_PUD1_REG, gpio_offset, &pull);
seq_printf(s, " gpio-%-3d (%-20.20s) %-3s",
gpio, label ?: "(none)",
is_out ? "out" : "in ");
if (!is_out) {
if (pullud &&
(offset >= pullud->first_pin) &&
(offset <= pullud->last_pin)) {
abx500_get_pull_updown(pct, offset, &pud);
seq_printf(s, " %-9s", pull_up_down[pud]);
} else {
abx500_gpio_get_bit(chip, AB8500_GPIO_PUD1_REG,
gpio_offset, &pd);
seq_printf(s, " %-9s", pull_up_down[pd]);
}
} else
seq_printf(s, " %-9s", chip->get(chip, offset) ? "hi" : "lo");
if (pctldev)
mode = abx500_get_mode(pctldev, chip, offset);
seq_printf(s, " gpio-%-3d (%-20.20s) %-3s %-9s %s",
gpio, label ?: "(none)",
is_out ? "out" : "in ",
is_out ?
(chip->get
? (chip->get(chip, offset) ? "hi" : "lo")
: "? ")
: (pull ? "pull up" : "pull down"),
(mode < 0) ? "unknown" : modes[mode]);
seq_printf(s, " %s", (mode < 0) ? "unknown" : modes[mode]);
}
static void abx500_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
@ -754,7 +808,7 @@ static int abx500_pin_config_set(struct pinctrl_dev *pctldev,
if (pullud &&
pin >= pullud->first_pin &&
pin <= pullud->last_pin)
ret = abx500_config_pull_updown(pct,
ret = abx500_set_pull_updown(pct,
pin,
argument ? ABX500_GPIO_PULL_DOWN : ABX500_GPIO_PULL_NONE);
else
@ -779,7 +833,7 @@ static int abx500_pin_config_set(struct pinctrl_dev *pctldev,
if (pullud &&
pin >= pullud->first_pin &&
pin <= pullud->last_pin) {
ret = abx500_config_pull_updown(pct,
ret = abx500_set_pull_updown(pct,
pin,
argument ? ABX500_GPIO_PULL_UP : ABX500_GPIO_PULL_NONE);
}