[PATCH 16/20] gpio/rockchip: try to get gpio id from uid when ACPI enabled

[Jianqun Xu]

When the ACPI is enabled, the GPIO index should be get from the uid,
otherwise get it from the dt alias or a static count to the legency dt
files.

Signed-off-by: Jianqun Xu <jay.xu@xxxxxxxxxxxxxx>
---
 drivers/gpio/gpio-rockchip.c | 40 ++++++++++++++++++++++++++++--------
 1 file changed, 31 insertions(+), 9 deletions(-)

diff --git a/drivers/gpio/gpio-rockchip.c b/drivers/gpio/gpio-rockchip.c
index 09ed5c880dde..11586d93549b 100644
--- a/drivers/gpio/gpio-rockchip.c
+++ b/drivers/gpio/gpio-rockchip.c
@@ -6,6 +6,7 @@
  * Copyright (c) 2021 Rockchip Electronics Co. Ltd.
  */
 
+#include <linux/acpi.h>
 #include <linux/bitops.h>
 #include <linux/clk.h>
 #include <linux/device.h>
@@ -710,6 +711,29 @@ rockchip_gpio_find_bank(struct pinctrl_dev *pctldev, int id)
 	return found ? bank : NULL;
 }
 
+static int rockchip_gpio_get_bank_id(struct device *dev)
+{
+	struct fwnode_handle *fwnode = dev_fwnode(dev);
+	int bank_id = -EINVAL;
+	u64 uid;
+	int ret;
+	static int gpio;
+
+	if (is_acpi_node(fwnode)) {
+		ret = acpi_dev_uid_to_integer(ACPI_COMPANION(dev), &uid);
+		if (ret < 0)
+			return ret;
+
+		bank_id = uid;
+	} else {
+		bank_id = of_alias_get_id(to_of_node(fwnode), "gpio");
+		if (bank_id < 0)
+			bank_id = gpio++;
+	}
+
+	return bank_id;
+}
+
 static int rockchip_gpio_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -717,8 +741,7 @@ static int rockchip_gpio_probe(struct platform_device *pdev)
 	struct device_node *pctlnp = of_get_parent(np);
 	struct pinctrl_dev *pctldev = NULL;
 	struct rockchip_pin_bank *bank = NULL;
-	static int gpio;
-	int id, ret;
+	int ret;
 
 	if (!np || !pctlnp)
 		return -ENODEV;
@@ -727,13 +750,11 @@ static int rockchip_gpio_probe(struct platform_device *pdev)
 	if (!pctldev)
 		return -EPROBE_DEFER;
 
-	id = of_alias_get_id(np, "gpio");
-	if (id < 0)
-		id = gpio++;
-
-	bank = rockchip_gpio_find_bank(pctldev, id);
-	if (!bank)
-		return -EINVAL;
+	ret = rockchip_gpio_get_bank_id(dev);
+	if (ret >= 0)
+		bank->bank_num = ret;
+	else
+		goto err;
 
 	bank->dev = dev;
 	bank->of_node = np;
@@ -759,6 +780,7 @@ static int rockchip_gpio_probe(struct platform_device *pdev)
 	clk_put(bank->db_clk);
 	clk_disable_unprepare(bank->clk);
 	clk_disable_unprepare(bank->db_clk);
+err:
 
 	return ret;
 }
-- 
2.25.1