修改led为gpio

hc

2024-10-12 a5969cabbb4660eab42b6ef0412cbbd1200cf14d

 kernel/drivers/i2c/busses/i2c-fsi.c
..
..
@@ -658,13 +658,29 @@
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 	.functionality = fsi_i2c_functionality,
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 };
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+static struct device_node *fsi_i2c_find_port_of_node(struct device_node *fsi,
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+						     int port)
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+{
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+	struct device_node *np;
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+	u32 port_no;
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+	int rc;
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+
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+	for_each_child_of_node(fsi, np) {
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+		rc = of_property_read_u32(np, "reg", &port_no);
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+		if (!rc && port_no == port)
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+			return np;
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+	}
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+
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+	return NULL;
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+}
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+
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 static int fsi_i2c_probe(struct device *dev)
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 {
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 	struct fsi_i2c_master *i2c;
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 	struct fsi_i2c_port *port;
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 	struct device_node *np;
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+	u32 port_no, ports, stat;
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 	int rc;
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-	u32 port_no;
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 	i2c = devm_kzalloc(dev, sizeof(*i2c), GFP_KERNEL);
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 	if (!i2c)
..
..
@@ -678,15 +694,23 @@
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 	if (rc)
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 		return rc;
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-	/* Add adapter for each i2c port of the master. */
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-	for_each_available_child_of_node(dev->of_node, np) {
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-		rc = of_property_read_u32(np, "reg", &port_no);
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-		if (rc || port_no > USHRT_MAX)
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+	rc = fsi_i2c_read_reg(i2c->fsi, I2C_FSI_STAT, &stat);
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+	if (rc)
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+		return rc;
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+
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+	ports = FIELD_GET(I2C_STAT_MAX_PORT, stat) + 1;
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+	dev_dbg(dev, "I2C master has %d ports\n", ports);
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+
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+	for (port_no = 0; port_no < ports; port_no++) {
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+		np = fsi_i2c_find_port_of_node(dev->of_node, port_no);
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+		if (!of_device_is_available(np))
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 			continue;
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 		port = kzalloc(sizeof(*port), GFP_KERNEL);
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-		if (!port)
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+		if (!port) {
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+			of_node_put(np);
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 			break;
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+		}
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 		port->master = i2c;
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 		port->port = port_no;