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path: root/drivers/pinctrl/qcom
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Diffstat (limited to 'drivers/pinctrl/qcom')
-rw-r--r--drivers/pinctrl/qcom/pinctrl-msm.c65
1 files changed, 62 insertions, 3 deletions
diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c
index 95e5c5ea40af..ad80a17c9990 100644
--- a/drivers/pinctrl/qcom/pinctrl-msm.c
+++ b/drivers/pinctrl/qcom/pinctrl-msm.c
@@ -105,6 +105,14 @@ static const struct pinctrl_ops msm_pinctrl_ops = {
.dt_free_map = pinctrl_utils_free_map,
};
+static int msm_pinmux_request(struct pinctrl_dev *pctldev, unsigned offset)
+{
+ struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+ struct gpio_chip *chip = &pctrl->chip;
+
+ return gpiochip_line_is_valid(chip, offset) ? 0 : -EINVAL;
+}
+
static int msm_get_functions_count(struct pinctrl_dev *pctldev)
{
struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
@@ -166,6 +174,7 @@ static int msm_pinmux_set_mux(struct pinctrl_dev *pctldev,
}
static const struct pinmux_ops msm_pinmux_ops = {
+ .request = msm_pinmux_request,
.get_functions_count = msm_get_functions_count,
.get_function_name = msm_get_function_name,
.get_function_groups = msm_get_function_groups,
@@ -506,6 +515,9 @@ static void msm_gpio_dbg_show_one(struct seq_file *s,
"pull up"
};
+ if (!gpiochip_line_is_valid(chip, offset))
+ return;
+
g = &pctrl->soc->groups[offset];
ctl_reg = readl(pctrl->regs + g->ctl_reg);
@@ -517,6 +529,7 @@ static void msm_gpio_dbg_show_one(struct seq_file *s,
seq_printf(s, " %-8s: %-3s %d", g->name, is_out ? "out" : "in", func);
seq_printf(s, " %dmA", msm_regval_to_drive(drive));
seq_printf(s, " %s", pulls[pull]);
+ seq_puts(s, "\n");
}
static void msm_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
@@ -524,10 +537,8 @@ static void msm_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
unsigned gpio = chip->base;
unsigned i;
- for (i = 0; i < chip->ngpio; i++, gpio++) {
+ for (i = 0; i < chip->ngpio; i++, gpio++)
msm_gpio_dbg_show_one(s, NULL, chip, i, gpio);
- seq_puts(s, "\n");
- }
}
#else
@@ -808,6 +819,46 @@ static void msm_gpio_irq_handler(struct irq_desc *desc)
chained_irq_exit(chip, desc);
}
+static int msm_gpio_init_valid_mask(struct gpio_chip *chip,
+ struct msm_pinctrl *pctrl)
+{
+ int ret;
+ unsigned int len, i;
+ unsigned int max_gpios = pctrl->soc->ngpios;
+ u16 *tmp;
+
+ /* The number of GPIOs in the ACPI tables */
+ len = ret = device_property_read_u16_array(pctrl->dev, "gpios", NULL, 0);
+ if (ret < 0)
+ return 0;
+
+ if (ret > max_gpios)
+ return -EINVAL;
+
+ tmp = kmalloc_array(len, sizeof(*tmp), GFP_KERNEL);
+ if (!tmp)
+ return -ENOMEM;
+
+ ret = device_property_read_u16_array(pctrl->dev, "gpios", tmp, len);
+ if (ret < 0) {
+ dev_err(pctrl->dev, "could not read list of GPIOs\n");
+ goto out;
+ }
+
+ bitmap_zero(chip->valid_mask, max_gpios);
+ for (i = 0; i < len; i++)
+ set_bit(tmp[i], chip->valid_mask);
+
+out:
+ kfree(tmp);
+ return ret;
+}
+
+static bool msm_gpio_needs_valid_mask(struct msm_pinctrl *pctrl)
+{
+ return device_property_read_u16_array(pctrl->dev, "gpios", NULL, 0) > 0;
+}
+
static int msm_gpio_init(struct msm_pinctrl *pctrl)
{
struct gpio_chip *chip;
@@ -824,6 +875,7 @@ static int msm_gpio_init(struct msm_pinctrl *pctrl)
chip->parent = pctrl->dev;
chip->owner = THIS_MODULE;
chip->of_node = pctrl->dev->of_node;
+ chip->need_valid_mask = msm_gpio_needs_valid_mask(pctrl);
ret = gpiochip_add_data(&pctrl->chip, pctrl);
if (ret) {
@@ -831,6 +883,13 @@ static int msm_gpio_init(struct msm_pinctrl *pctrl)
return ret;
}
+ ret = msm_gpio_init_valid_mask(chip, pctrl);
+ if (ret) {
+ dev_err(pctrl->dev, "Failed to setup irq valid bits\n");
+ gpiochip_remove(&pctrl->chip);
+ return ret;
+ }
+
ret = gpiochip_add_pin_range(&pctrl->chip, dev_name(pctrl->dev), 0, 0, chip->ngpio);
if (ret) {
dev_err(pctrl->dev, "Failed to add pin range\n");