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-rw-r--r--drivers/i2c/s3c24x0_i2c.c25
-rw-r--r--drivers/i2c/s3c24x0_i2c.h1
2 files changed, 19 insertions, 7 deletions
diff --git a/drivers/i2c/s3c24x0_i2c.c b/drivers/i2c/s3c24x0_i2c.c
index c65360d..0e6f241 100644
--- a/drivers/i2c/s3c24x0_i2c.c
+++ b/drivers/i2c/s3c24x0_i2c.c
@@ -52,7 +52,6 @@
*/
static unsigned int g_current_bus __attribute__((section(".data")));
#ifdef CONFIG_OF_CONTROL
-static int i2c_busses __attribute__((section(".data")));
static struct s3c24x0_i2c_bus i2c_bus[CONFIG_MAX_I2C_NUM]
__attribute__((section(".data")));
#endif
@@ -164,8 +163,8 @@ int i2c_set_bus_num(unsigned int bus)
{
struct s3c24x0_i2c *i2c;
- if ((bus < 0) || (bus >= CONFIG_MAX_I2C_NUM)) {
- debug("Bad bus: %d\n", bus);
+ i2c_bus = get_bus(bus);
+ if (!i2c_bus)
return -1;
}
@@ -483,19 +482,31 @@ void board_i2c_init(const void *blob)
if (node <= 0)
continue;
bus = &i2c_bus[i];
+ bus->active = true;
bus->regs = (struct s3c24x0_i2c *)
fdtdec_get_addr(blob, node, "reg");
bus->id = pinmux_decode_periph_id(blob, node);
bus->node = node;
- bus->bus_num = i2c_busses++;
+ bus->bus_num = i;
exynos_pinmux_config(bus->id, 0);
}
}
+/**
+ * Get a pointer to the given bus index
+ *
+ * @bus_idx: Bus index to look up
+ * @return pointer to bus, or NULL if invalid or not available
+ */
static struct s3c24x0_i2c_bus *get_bus(unsigned int bus_idx)
{
- if (bus_idx < i2c_busses)
- return &i2c_bus[bus_idx];
+ if (bus_idx < ARRAY_SIZE(i2c_bus)) {
+ struct s3c24x0_i2c_bus *bus;
+
+ bus = &i2c_bus[bus_idx];
+ if (bus->active)
+ return bus;
+ }
debug("Undefined bus: %d\n", bus_idx);
return NULL;
@@ -505,7 +516,7 @@ int i2c_get_bus_num_fdt(int node)
{
int i;
- for (i = 0; i < i2c_busses; i++) {
+ for (i = 0; i < ARRAY_SIZE(i2c_bus); i++) {
if (node == i2c_bus[i].node)
return i;
}
diff --git a/drivers/i2c/s3c24x0_i2c.h b/drivers/i2c/s3c24x0_i2c.h
index b4a337a..882af62 100644
--- a/drivers/i2c/s3c24x0_i2c.h
+++ b/drivers/i2c/s3c24x0_i2c.h
@@ -16,6 +16,7 @@ struct s3c24x0_i2c {
};
struct s3c24x0_i2c_bus {
+ bool active; /* port is active and available */
int node; /* device tree node */
int bus_num; /* i2c bus number */
struct s3c24x0_i2c *regs;