diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/s3c24x0_i2c.c | 25 | ||||
| -rw-r--r-- | drivers/i2c/s3c24x0_i2c.h | 1 |
2 files changed, 19 insertions, 7 deletions
diff --git a/drivers/i2c/s3c24x0_i2c.c b/drivers/i2c/s3c24x0_i2c.c index c65360d0f..0e6f2414f 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 b4a337a57..882af6206 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; |