pinctrl: stmfx: Use the callback to populate valid_mask

This makes use of the existing callback to populate the
valid mask instead of iteratively setting it up during
probe.

Cc: Benjamin Gaignard <benjamin.gaignard@st.com>
Cc: Amelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20190819091140.622-1-linus.walleij@linaro.org

drivers/pinctrl/pinctrl-stmfx.c

@@ -585,12 +585,24 @@ static int stmfx_pinctrl_gpio_function_enable(struct stmfx_pinctrl *pctl)
 	return stmfx_function_enable(pctl->stmfx, func);
 }
 
+static int stmfx_pinctrl_gpio_init_valid_mask(struct gpio_chip *gc,
+					      unsigned long *valid_mask,
+					      unsigned int ngpios)
+{
+	struct stmfx_pinctrl *pctl = gpiochip_get_data(gc);
+	u32 n;
+
+	for_each_clear_bit(n, &pctl->gpio_valid_mask, ngpios)
+		clear_bit(n, valid_mask);
+
+	return 0;
+}
+
 static int stmfx_pinctrl_probe(struct platform_device *pdev)
 {
 	struct stmfx *stmfx = dev_get_drvdata(pdev->dev.parent);
 	struct device_node *np = pdev->dev.of_node;
 	struct stmfx_pinctrl *pctl;
-	u32 n;
 	int irq, ret;
 
 	pctl = devm_kzalloc(stmfx->dev, sizeof(*pctl), GFP_KERNEL);
@@ -651,6 +663,7 @@ static int stmfx_pinctrl_probe(struct platform_device *pdev)
 	pctl->gpio_chip.can_sleep = true;
 	pctl->gpio_chip.of_node = np;
 	pctl->gpio_chip.need_valid_mask = true;
+	pctl->gpio_chip.init_valid_mask = stmfx_pinctrl_gpio_init_valid_mask;
 
 	ret = devm_gpiochip_add_data(pctl->dev, &pctl->gpio_chip, pctl);
 	if (ret) {
@@ -668,8 +681,6 @@ static int stmfx_pinctrl_probe(struct platform_device *pdev)
 	pctl->irq_chip.irq_set_type = stmfx_pinctrl_irq_set_type;
 	pctl->irq_chip.irq_bus_lock = stmfx_pinctrl_irq_bus_lock;
 	pctl->irq_chip.irq_bus_sync_unlock = stmfx_pinctrl_irq_bus_sync_unlock;
-	for_each_clear_bit(n, &pctl->gpio_valid_mask, pctl->gpio_chip.ngpio)
-		clear_bit(n, pctl->gpio_chip.valid_mask);
 
 	ret = gpiochip_irqchip_add_nested(&pctl->gpio_chip, &pctl->irq_chip,
 					  0, handle_bad_irq, IRQ_TYPE_NONE);