From a5969cabbb4660eab42b6ef0412cbbd1200cf14d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 12 Oct 2024 07:10:09 +0000
Subject: [PATCH] 修改led为gpio
---
kernel/drivers/i2c/busses/i2c-fsi.c | 36 ++++++++++++++++++++++++++++++------
1 files changed, 30 insertions(+), 6 deletions(-)
diff --git a/kernel/drivers/i2c/busses/i2c-fsi.c b/kernel/drivers/i2c/busses/i2c-fsi.c
index 46aef60..1033269 100644
--- a/kernel/drivers/i2c/busses/i2c-fsi.c
+++ b/kernel/drivers/i2c/busses/i2c-fsi.c
@@ -658,13 +658,29 @@
.functionality = fsi_i2c_functionality,
};
+static struct device_node *fsi_i2c_find_port_of_node(struct device_node *fsi,
+ int port)
+{
+ struct device_node *np;
+ u32 port_no;
+ int rc;
+
+ for_each_child_of_node(fsi, np) {
+ rc = of_property_read_u32(np, "reg", &port_no);
+ if (!rc && port_no == port)
+ return np;
+ }
+
+ return NULL;
+}
+
static int fsi_i2c_probe(struct device *dev)
{
struct fsi_i2c_master *i2c;
struct fsi_i2c_port *port;
struct device_node *np;
+ u32 port_no, ports, stat;
int rc;
- u32 port_no;
i2c = devm_kzalloc(dev, sizeof(*i2c), GFP_KERNEL);
if (!i2c)
@@ -678,15 +694,23 @@
if (rc)
return rc;
- /* Add adapter for each i2c port of the master. */
- for_each_available_child_of_node(dev->of_node, np) {
- rc = of_property_read_u32(np, "reg", &port_no);
- if (rc || port_no > USHRT_MAX)
+ rc = fsi_i2c_read_reg(i2c->fsi, I2C_FSI_STAT, &stat);
+ if (rc)
+ return rc;
+
+ ports = FIELD_GET(I2C_STAT_MAX_PORT, stat) + 1;
+ dev_dbg(dev, "I2C master has %d ports\n", ports);
+
+ for (port_no = 0; port_no < ports; port_no++) {
+ np = fsi_i2c_find_port_of_node(dev->of_node, port_no);
+ if (!of_device_is_available(np))
continue;
port = kzalloc(sizeof(*port), GFP_KERNEL);
- if (!port)
+ if (!port) {
+ of_node_put(np);
break;
+ }
port->master = i2c;
port->port = port_no;
--
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