[PATCH v3 1/6] gpio: imx_rgpio2p: support one address

[Peng Fan (OSS)]

From: Peng Fan <peng.fan at nxp.com>

The i.MX8ULP/93 gpio dt-schema have been updated to only have one
address entry, update the driver to support it.

Signed-off-by: Peng Fan <peng.fan at nxp.com>
---
 drivers/gpio/imx_rgpio2p.c | 42 ++++++++++++++++++++++++++++++++++++++----
 1 file changed, 38 insertions(+), 4 deletions(-)

diff --git a/drivers/gpio/imx_rgpio2p.c b/drivers/gpio/imx_rgpio2p.c
index 175e460aff5..3227a8d5b57 100644
--- a/drivers/gpio/imx_rgpio2p.c
+++ b/drivers/gpio/imx_rgpio2p.c
@@ -21,6 +21,12 @@ enum imx_rgpio2p_direction {
 
 #define GPIO_PER_BANK			32
 
+struct imx_rgpio2p_soc_data {
+	bool have_dual_base;
+};
+
+#define IMX8ULP_GPIO_BASE_OFF	0x40
+
 struct imx_rgpio2p_data {
 	struct gpio_regs *regs;
 };
@@ -165,6 +171,9 @@ static int imx_rgpio2p_probe(struct udevice *dev)
 static int imx_rgpio2p_bind(struct udevice *dev)
 {
 	struct imx_rgpio2p_plat *plat = dev_get_plat(dev);
+	struct imx_rgpio2p_soc_data *data =
+		(struct imx_rgpio2p_soc_data *)dev_get_driver_data(dev);
+	bool dual_base = data->have_dual_base;
 	fdt_addr_t addr;
 
 	/*
@@ -176,9 +185,26 @@ static int imx_rgpio2p_bind(struct udevice *dev)
 	if (plat)
 		return 0;
 
-	addr = devfdt_get_addr_index(dev, 1);
-	if (addr == FDT_ADDR_T_NONE)
-		return -EINVAL;
+	/*
+	 * Handle legacy compatible combinations which used two reg values
+	 * for the i.MX8ULP and i.MX93.
+	 */
+	if (device_is_compatible(dev, "fsl,imx7ulp-gpio") &&
+	    (device_is_compatible(dev, "fsl,imx93-gpio") ||
+	    (device_is_compatible(dev, "fsl,imx8ulp-gpio"))))
+		dual_base = true;
+
+	if (dual_base) {
+		addr = devfdt_get_addr_index(dev, 1);
+		if (addr == FDT_ADDR_T_NONE)
+			return -EINVAL;
+	} else {
+		addr = devfdt_get_addr_index(dev, 0);
+		if (addr == FDT_ADDR_T_NONE)
+			return -EINVAL;
+
+		addr += IMX8ULP_GPIO_BASE_OFF;
+	}
 
 	/*
 	 * TODO:
@@ -202,9 +228,17 @@ static int imx_rgpio2p_bind(struct udevice *dev)
 	return 0;
 }
 
+static struct imx_rgpio2p_soc_data imx7ulp_data = {
+	.have_dual_base = true,
+};
+
+static struct imx_rgpio2p_soc_data imx8ulp_data = {
+	.have_dual_base = false,
+};
 
 static const struct udevice_id imx_rgpio2p_ids[] = {
-	{ .compatible = "fsl,imx7ulp-gpio" },
+	{ .compatible = "fsl,imx7ulp-gpio", .data = (ulong)&imx7ulp_data },
+	{ .compatible = "fsl,imx8ulp-gpio", .data = (ulong)&imx8ulp_data },
 	{ }
 };
 

-- 
2.35.3