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hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/gpio/gpio-htc-egpio.c
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@@ -118,20 +118,6 @@
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 	}
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 }
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-int htc_egpio_get_wakeup_irq(struct device *dev)
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-{
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-	struct egpio_info *ei = dev_get_drvdata(dev);
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-
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-	/* Read current pins. */
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-	u16 readval = egpio_readw(ei, ei->ack_register);
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-	/* Ack/unmask interrupts. */
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-	ack_irqs(ei);
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-	/* Return first set pin. */
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-	readval &= ei->irqs_enabled;
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-	return ei->irq_start + ffs(readval) - 1;
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-}
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-EXPORT_SYMBOL(htc_egpio_get_wakeup_irq);
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-
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 static inline int egpio_pos(struct egpio_info *ei, int bit)
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 {
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 	return bit >> ei->reg_shift;
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@@ -189,7 +175,6 @@
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 	unsigned long     flag;
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 	struct egpio_chip *egpio;
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 	struct egpio_info *ei;
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-	unsigned          bit;
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 	int               pos;
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 	int               reg;
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 	int               shift;
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@@ -199,7 +184,6 @@
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 	egpio = gpiochip_get_data(chip);
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 	ei    = dev_get_drvdata(egpio->dev);
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-	bit   = egpio_bit(ei, offset);
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 	pos   = egpio_pos(ei, offset);
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 	reg   = egpio->reg_start + pos;
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 	shift = pos << ei->reg_shift;
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@@ -236,7 +220,10 @@
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 	egpio = gpiochip_get_data(chip);
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-	return !test_bit(offset, &egpio->is_out);
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+	if (test_bit(offset, &egpio->is_out))
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+		return GPIO_LINE_DIRECTION_OUT;
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+
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+	return GPIO_LINE_DIRECTION_IN;
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 }
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 static void egpio_write_cache(struct egpio_info *ei)
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@@ -281,7 +268,6 @@
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 	struct gpio_chip  *chip;
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 	unsigned int      irq, irq_end;
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 	int               i;
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-	int               ret;
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 	/* Initialize ei data structure. */
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 	ei = devm_kzalloc(&pdev->dev, sizeof(*ei), GFP_KERNEL);
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@@ -291,28 +277,24 @@
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 	spin_lock_init(&ei->lock);
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 	/* Find chained irq */
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-	ret = -EINVAL;
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 	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
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 	if (res)
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 		ei->chained_irq = res->start;
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 	/* Map egpio chip into virtual address space. */
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-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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-	if (!res)
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-		goto fail;
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-	ei->base_addr = devm_ioremap_nocache(&pdev->dev, res->start,
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-					     resource_size(res));
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-	if (!ei->base_addr)
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-		goto fail;
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-	pr_debug("EGPIO phys=%08x virt=%p\n", (u32)res->start, ei->base_addr);
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+	ei->base_addr = devm_platform_ioremap_resource(pdev, 0);
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+	if (IS_ERR(ei->base_addr))
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+		return PTR_ERR(ei->base_addr);
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 	if ((pdata->bus_width != 16) && (pdata->bus_width != 32))
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-		goto fail;
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+		return -EINVAL;
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+
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 	ei->bus_shift = fls(pdata->bus_width - 1) - 3;
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 	pr_debug("bus_shift = %d\n", ei->bus_shift);
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 	if ((pdata->reg_width != 8) && (pdata->reg_width != 16))
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-		goto fail;
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+		return -EINVAL;
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+
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 	ei->reg_shift = fls(pdata->reg_width - 1);
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 	pr_debug("reg_shift = %d\n", ei->reg_shift);
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@@ -324,17 +306,21 @@
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 	ei->chip = devm_kcalloc(&pdev->dev,
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 				ei->nchips, sizeof(struct egpio_chip),
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 				GFP_KERNEL);
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-	if (!ei->chip) {
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-		ret = -ENOMEM;
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-		goto fail;
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-	}
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+	if (!ei->chip)
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+		return -ENOMEM;
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+
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 	for (i = 0; i < ei->nchips; i++) {
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 		ei->chip[i].reg_start = pdata->chip[i].reg_start;
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 		ei->chip[i].cached_values = pdata->chip[i].initial_values;
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 		ei->chip[i].is_out = pdata->chip[i].direction;
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 		ei->chip[i].dev = &(pdev->dev);
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 		chip = &(ei->chip[i].chip);
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-		chip->label           = "htc-egpio";
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+		chip->label = devm_kasprintf(&pdev->dev, GFP_KERNEL,
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+					     "htc-egpio-%d",
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+					     i);
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+		if (!chip->label)
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+			return -ENOMEM;
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+
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 		chip->parent          = &pdev->dev;
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 		chip->owner           = THIS_MODULE;
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 		chip->get             = egpio_get;
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@@ -376,10 +362,6 @@
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 	}
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 	return 0;
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-
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-fail:
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-	printk(KERN_ERR "EGPIO failed to setup\n");
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-	return ret;
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 }
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 #ifdef CONFIG_PM