pinctrl: Use new GPIO_LINE_DIRECTION

Use newly added GPIO defines GPIO_LINE_DIRECTION_IN and
GPIO_LINE_DIRECTION_OUT instead of using hard-coded 1 and 0.

Main benefit is to make it easier to see which values mean IN and which
OUT. As a side effect this helps GPIO framework to change the direction
defines to something else if ever needed.

Please note that return value from get_direction call on
pinctrl-axp209 driver was changed. Previously pinctrl-axp209 might have
returned value 2 for direction INPUT.

Signed-off-by: Matti Vaittinen <[e-mail]>
Reported-by: kbuild test robot <[e-mail]>
Reviewed-by: Geert Uytterhoeven <[e-mail]>
Acked-by: Geert Uytterhoeven <[e-mail]>
Reviewed-by: Bjorn Andersson <[e-mail]>
Reviewed-by: Jacopo Mondi <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Linus Walleij <[e-mail]>

drivers/pinctrl/bcm/pinctrl-bcm2835.c

···
 	if (fsel > BCM2835_FSEL_GPIO_OUT)
 		return -EINVAL;
 
-	return (fsel == BCM2835_FSEL_GPIO_IN);
+	if (fsel == BCM2835_FSEL_GPIO_IN)
+		return GPIO_LINE_DIRECTION_IN;
+
+	return GPIO_LINE_DIRECTION_OUT;
 }
 
 static void bcm2835_gpio_set(struct gpio_chip *chip, unsigned offset, int value)

drivers/pinctrl/bcm/pinctrl-iproc-gpio.c

···
 	unsigned int offset = IPROC_GPIO_REG(gpio, IPROC_GPIO_OUT_EN_OFFSET);
 	unsigned int shift = IPROC_GPIO_SHIFT(gpio);
 
-	return !(readl(chip->base + offset) & BIT(shift));
+	if (readl(chip->base + offset) & BIT(shift))
+		return GPIO_LINE_DIRECTION_OUT;
+
+	return GPIO_LINE_DIRECTION_IN;
 }
 
 static void iproc_gpio_set(struct gpio_chip *gc, unsigned gpio, int val)

drivers/pinctrl/mediatek/pinctrl-mtk-common.c

···
 		pctl->devdata->spec_dir_set(&reg_addr, offset);
 
 	regmap_read(pctl->regmap1, reg_addr, &read_val);
-	return !(read_val & bit);
+	if (read_val & bit)
+		return GPIO_LINE_DIRECTION_OUT;
+
+	return GPIO_LINE_DIRECTION_IN;
 }
 
 static int mtk_gpio_get(struct gpio_chip *chip, unsigned offset)

drivers/pinctrl/mediatek/pinctrl-paris.c

···
 	if (err)
 		return err;
 
-	return !value;
+	if (value)
+		return GPIO_LINE_DIRECTION_OUT;
+
+	return GPIO_LINE_DIRECTION_IN;
 }
 
 static int mtk_gpio_get(struct gpio_chip *chip, unsigned int gpio)

drivers/pinctrl/mvebu/pinctrl-armada-37xx.c

···
 	mask = BIT(offset);
 	regmap_read(info->regmap, reg, &val);
 
-	return !(val & mask);
+	if (val & mask)
+		return GPIO_LINE_DIRECTION_OUT;
+
+	return GPIO_LINE_DIRECTION_IN;
 }
 
 static int armada_37xx_gpio_direction_output(struct gpio_chip *chip,

drivers/pinctrl/nomadik/pinctrl-nomadik.c

···
 
 	clk_enable(nmk_chip->clk);
 
-	dir = !(readl(nmk_chip->addr + NMK_GPIO_DIR) & BIT(offset));
+	dir = readl(nmk_chip->addr + NMK_GPIO_DIR) & BIT(offset);
 
 	clk_disable(nmk_chip->clk);
 
-	return dir;
+	if (dir)
+		return GPIO_LINE_DIRECTION_OUT;
+
+	return GPIO_LINE_DIRECTION_IN;
 }
 
 static int nmk_gpio_make_input(struct gpio_chip *chip, unsigned offset)

drivers/pinctrl/pinctrl-amd.c

···
 	pin_reg = readl(gpio_dev->base + offset * 4);
 	raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
 
-	return !(pin_reg & BIT(OUTPUT_ENABLE_OFF));
+	if (pin_reg & BIT(OUTPUT_ENABLE_OFF))
+		return GPIO_LINE_DIRECTION_OUT;
+
+	return GPIO_LINE_DIRECTION_IN;
 }
 
 static int amd_gpio_direction_input(struct gpio_chip *gc, unsigned offset)

drivers/pinctrl/pinctrl-at91.c

···
 	u32 osr;
 
 	osr = readl_relaxed(pio + PIO_OSR);
-	return !(osr & mask);
+	if (osr & mask)
+		return GPIO_LINE_DIRECTION_OUT;
+
+	return GPIO_LINE_DIRECTION_IN;
 }
 
 static int at91_gpio_direction_input(struct gpio_chip *chip, unsigned offset)

drivers/pinctrl/pinctrl-axp209.c

···
 	 * going to change the value soon anyway. Default to output.
 	 */
 	if ((val & AXP20X_GPIO_FUNCTIONS) > 2)
-		return 0;
+		return GPIO_LINE_DIRECTION_OUT;
 
 	/*
 	 * The GPIO directions are the three lowest values.
 	 * 2 is input, 0 and 1 are output
 	 */
-	return val & 2;
+	if (val & 2)
+		return GPIO_LINE_DIRECTION_IN;
+
+	return GPIO_LINE_DIRECTION_OUT;
 }
 
 static int axp20x_gpio_output(struct gpio_chip *chip, unsigned int offset,

drivers/pinctrl/pinctrl-ingenic.c

···
 	struct ingenic_pinctrl *jzpc = jzgc->jzpc;
 	unsigned int pin = gc->base + offset;
 
-	if (jzpc->info->version >= ID_JZ4760)
-		return ingenic_get_pin_config(jzpc, pin, JZ4760_GPIO_PAT1);
+	if (jzpc->info->version >= ID_JZ4760) {
+		if (ingenic_get_pin_config(jzpc, pin, JZ4760_GPIO_PAT1))
+			return GPIO_LINE_DIRECTION_IN;
+		return GPIO_LINE_DIRECTION_OUT;
+	}
 
 	if (ingenic_get_pin_config(jzpc, pin, JZ4740_GPIO_SELECT))
-		return true;
+		return GPIO_LINE_DIRECTION_IN;
 
-	return !ingenic_get_pin_config(jzpc, pin, JZ4740_GPIO_DIR);
+	if (ingenic_get_pin_config(jzpc, pin, JZ4740_GPIO_DIR))
+		return GPIO_LINE_DIRECTION_OUT;
+
+	return GPIO_LINE_DIRECTION_IN;
 }
 
 static const struct pinctrl_ops ingenic_pctlops = {

drivers/pinctrl/pinctrl-ocelot.c

···
 
 	regmap_read(info->map, REG(OCELOT_GPIO_OE, info, offset), &val);
 
-	return !(val & BIT(offset % 32));
+	if (val & BIT(offset % 32))
+		return GPIO_LINE_DIRECTION_OUT;
+
+	return GPIO_LINE_DIRECTION_IN;
 }
 
 static int ocelot_gpio_direction_input(struct gpio_chip *chip,

drivers/pinctrl/pinctrl-oxnas.c

···
 	struct oxnas_gpio_bank *bank = gpiochip_get_data(chip);
 	u32 mask = BIT(offset);
 
-	return !(readl_relaxed(bank->reg_base + OUTPUT_EN) & mask);
+	if (readl_relaxed(bank->reg_base + OUTPUT_EN) & mask)
+		return GPIO_LINE_DIRECTION_OUT;
+
+	return GPIO_LINE_DIRECTION_IN;
 }
 
 static int oxnas_gpio_direction_input(struct gpio_chip *chip,

drivers/pinctrl/pinctrl-pic32.c

···
 {
 	struct pic32_gpio_bank *bank = gpiochip_get_data(chip);
 
-	return !!(readl(bank->reg_base + TRIS_REG) & BIT(offset));
+	if (readl(bank->reg_base + TRIS_REG) & BIT(offset))
+		return GPIO_LINE_DIRECTION_IN;
+
+	return GPIO_LINE_DIRECTION_OUT;
 }
 
 static void pic32_gpio_irq_ack(struct irq_data *data)

drivers/pinctrl/pinctrl-pistachio.c

···
 {
 	struct pistachio_gpio_bank *bank = gpiochip_get_data(chip);
 
-	return !(gpio_readl(bank, GPIO_OUTPUT_EN) & BIT(offset));
+	if (gpio_readl(bank, GPIO_OUTPUT_EN) & BIT(offset))
+		return GPIO_LINE_DIRECTION_OUT;
+
+	return GPIO_LINE_DIRECTION_IN;
 }
 
 static int pistachio_gpio_get(struct gpio_chip *chip, unsigned offset)

drivers/pinctrl/pinctrl-rk805.c

···
 
 	/* default output*/
 	if (!pci->pin_cfg[offset].dir_msk)
-		return 0;
+		return GPIO_LINE_DIRECTION_OUT;
 
 	ret = regmap_read(pci->rk808->regmap,
 			  pci->pin_cfg[offset].reg,
···
 		return ret;
 	}
 
-	return !(val & pci->pin_cfg[offset].dir_msk);
+	if (val & pci->pin_cfg[offset].dir_msk)
+		return GPIO_LINE_DIRECTION_OUT;
+
+	return GPIO_LINE_DIRECTION_IN;
 }
 
 static const struct gpio_chip rk805_gpio_chip = {

drivers/pinctrl/pinctrl-rockchip.c

···
 	data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
 	clk_disable(bank->clk);
 
-	return !(data & BIT(offset));
+	if (data & BIT(offset))
+		return GPIO_LINE_DIRECTION_OUT;
+
+	return GPIO_LINE_DIRECTION_IN;
 }
 
 /*

drivers/pinctrl/pinctrl-rza1.c

···
 {
 	struct rza1_port *port = gpiochip_get_data(chip);
 
-	return !!rza1_get_bit(port, RZA1_PM_REG, gpio);
+	if (rza1_get_bit(port, RZA1_PM_REG, gpio))
+		return GPIO_LINE_DIRECTION_IN;
+
+	return GPIO_LINE_DIRECTION_OUT;
 }
 
 static int rza1_gpio_direction_input(struct gpio_chip *chip,

drivers/pinctrl/pinctrl-rza2.c

···
 	reg16 = (reg16 >> (pin * 2)) & RZA2_PDR_MASK;
 
 	if (reg16 == RZA2_PDR_OUTPUT)
-		return 0;
+		return GPIO_LINE_DIRECTION_OUT;
 
 	if (reg16 == RZA2_PDR_INPUT)
-		return 1;
+		return GPIO_LINE_DIRECTION_IN;
 
 	/*
 	 * This GPIO controller has a default Hi-Z state that is not input or
···
 	 */
 	rza2_pin_to_gpio(priv->base, offset, 1);
 
-	return 1;
+	return GPIO_LINE_DIRECTION_IN;
 }
 
 static int rza2_chip_direction_input(struct gpio_chip *chip,

drivers/pinctrl/pinctrl-st.c

···
 	function = st_pctl_get_pin_function(&pc, offset);
 	if (function) {
 		st_pinconf_get_direction(&pc, offset, &config);
-		return !ST_PINCONF_UNPACK_OE(config);
+		if (ST_PINCONF_UNPACK_OE(config))
+			return GPIO_LINE_DIRECTION_OUT;
+
+		return GPIO_LINE_DIRECTION_IN;
 	}
 
 	/*
···
 		direction |= ((value >> offset) & 0x1) << i;
 	}
 
-	return (direction == ST_GPIO_DIRECTION_IN);
+	if (direction == ST_GPIO_DIRECTION_IN)
+		return GPIO_LINE_DIRECTION_IN;
+
+	return GPIO_LINE_DIRECTION_OUT;
 }
 
 /* Pinctrl Groups */
···
 	unsigned int function;
 	int offset = st_gpio_pin(pin_id);
 	char f[16];
+	int oe;
 
 	mutex_unlock(&pctldev->mutex);
 	pc = st_get_pio_control(pctldev, pin_id);
···
 	else
 		snprintf(f, 5, "GPIO");
 
+	oe = st_gpio_get_direction(&pc_to_bank(pc)->gpio_chip, offset);
 	seq_printf(s, "[OE:%d,PU:%ld,OD:%ld]\t%s\n"
 		"\t\t[retime:%ld,invclk:%ld,clknotdat:%ld,"
 		"de:%ld,rt-clk:%ld,rt-delay:%ld]",
-		!st_gpio_get_direction(&pc_to_bank(pc)->gpio_chip, offset),
+		(oe == GPIO_LINE_DIRECTION_OUT),
 		ST_PINCONF_UNPACK_PU(config),
 		ST_PINCONF_UNPACK_OD(config),
 		f,

drivers/pinctrl/pinctrl-stmfx.c

···
 	ret = regmap_read(pctl->stmfx->map, reg, &val);
 	/*
 	 * On stmfx, gpio pins direction is (0)input, (1)output.
-	 * .get_direction returns 0=out, 1=in
 	 */
+	if (ret)
+		return ret;
 
-	return ret ? ret : !(val & mask);
+	if (val & mask)
+		return GPIO_LINE_DIRECTION_OUT;
+
+	return GPIO_LINE_DIRECTION_IN;
 }
 
 static int stmfx_gpio_direction_input(struct gpio_chip *gc, unsigned int offset)
···
 	dir = stmfx_gpio_get_direction(&pctl->gpio_chip, pin);
 	if (dir < 0)
 		return dir;
+
+	/*
+	 * Currently the gpiolib IN is 1 and OUT is 0 but let's not count
+	 * on it just to be on the safe side also in the future :)
+	 */
+	dir = (dir == GPIO_LINE_DIRECTION_IN) ? 1 : 0;
+
 	type = stmfx_pinconf_get_type(pctl, pin);
 	if (type < 0)
 		return type;
···
 	if (val < 0)
 		return;
 
-	if (!dir) {
+	if (dir == GPIO_LINE_DIRECTION_OUT) {
 		seq_printf(s, "output %s ", val ? "high" : "low");
 		if (type)
 			seq_printf(s, "open drain %s internal pull-up ",

drivers/pinctrl/pinctrl-sx150x.c

···
 	int ret;
 
 	if (sx150x_pin_is_oscio(pctl, offset))
-		return false;
+		return GPIO_LINE_DIRECTION_OUT;
 
 	ret = regmap_read(pctl->regmap, pctl->data->reg_dir, &value);
 	if (ret < 0)
 		return ret;
 
-	return !!(value & BIT(offset));
+	if (value & BIT(offset))
+		return GPIO_LINE_DIRECTION_IN;
+
+	return GPIO_LINE_DIRECTION_OUT;
 }
 
 static int sx150x_gpio_get(struct gpio_chip *chip, unsigned int offset)
···
 		if (ret < 0)
 			return ret;
 
-		if (ret)
+		if (ret == GPIO_LINE_DIRECTION_IN)
 			return -EINVAL;
 
 		ret = sx150x_gpio_get(&pctl->gpio, pin);

drivers/pinctrl/qcom/pinctrl-msm.c

···
 
 	val = msm_readl_ctl(pctrl, g);
 
-	/* 0 = output, 1 = input */
-	return val & BIT(g->oe_bit) ? 0 : 1;
+	return val & BIT(g->oe_bit) ? GPIO_LINE_DIRECTION_OUT :
+				      GPIO_LINE_DIRECTION_IN;
 }
 
 static int msm_gpio_get(struct gpio_chip *chip, unsigned offset)

drivers/pinctrl/stm32/pinctrl-stm32.c

···
 
 	stm32_pmx_get_mode(bank, pin, &mode, &alt);
 	if ((alt == 0) && (mode == 0))
-		ret = 1;
+		ret = GPIO_LINE_DIRECTION_IN;
 	else if ((alt == 0) && (mode == 1))
-		ret = 0;
+		ret = GPIO_LINE_DIRECTION_OUT;
 	else
 		ret = -EINVAL;
 

drivers/pinctrl/vt8500/pinctrl-wmt.c

···
 	u32 val;
 
 	val = readl_relaxed(data->base + reg_dir);
-	/* Return 0 == output, 1 == input */
-	return !(val & BIT(bit));
+	if (val & BIT(bit))
+		return GPIO_LINE_DIRECTION_OUT;
+
+	return GPIO_LINE_DIRECTION_IN;
 }
 
 static int wmt_gpio_get_value(struct gpio_chip *chip, unsigned offset)