diff options
Diffstat (limited to 'drivers/i2c/mxc_i2c.c')
| -rw-r--r-- | drivers/i2c/mxc_i2c.c | 46 |
1 files changed, 24 insertions, 22 deletions
diff --git a/drivers/i2c/mxc_i2c.c b/drivers/i2c/mxc_i2c.c index 81adf6f450..b3c50aaf30 100644 --- a/drivers/i2c/mxc_i2c.c +++ b/drivers/i2c/mxc_i2c.c @@ -170,6 +170,9 @@ static int bus_i2c_set_bus_speed(struct mxc_i2c_bus *i2c_bus, int speed) u8 idx = i2c_clk_div[clk_idx][1]; int reg_shift = quirk ? VF610_I2C_REGSHIFT : IMX_I2C_REGSHIFT; + if (!base) + return -ENODEV; + /* Store divider value */ writeb(idx, base + (IFDR << reg_shift)); @@ -351,6 +354,10 @@ static int i2c_init_transfer(struct mxc_i2c_bus *i2c_bus, u8 chip, int ret; int reg_shift = i2c_bus->driver_data & I2C_QUIRK_FLAG ? VF610_I2C_REGSHIFT : IMX_I2C_REGSHIFT; + + if (!i2c_bus->base) + return -ENODEV; + for (retry = 0; retry < 3; retry++) { ret = i2c_init_transfer_(i2c_bus, chip, addr, alen); if (ret >= 0) @@ -503,35 +510,30 @@ static int bus_i2c_write(struct mxc_i2c_bus *i2c_bus, u8 chip, u32 addr, return ret; } +#if !defined(I2C2_BASE_ADDR) +#define I2C2_BASE_ADDR 0 +#endif + +#if !defined(I2C3_BASE_ADDR) +#define I2C3_BASE_ADDR 0 +#endif + +#if !defined(I2C4_BASE_ADDR) +#define I2C4_BASE_ADDR 0 +#endif + static struct mxc_i2c_bus mxc_i2c_buses[] = { -#if defined(CONFIG_MX25) - { 0, IMX_I2C_BASE }, - { 1, IMX_I2C2_BASE }, - { 2, IMX_I2C3_BASE }, -#elif defined(CONFIG_MX27) - { 0, IMX_I2C1_BASE }, - { 1, IMX_I2C2_BASE }, -#elif defined(CONFIG_MX31) || defined(CONFIG_MX35) || \ - defined(CONFIG_MX51) || defined(CONFIG_MX53) || \ - defined(CONFIG_MX6) - { 0, I2C1_BASE_ADDR }, - { 1, I2C2_BASE_ADDR }, - { 2, I2C3_BASE_ADDR }, -#elif defined(CONFIG_LS102XA) - { 0, I2C1_BASE_ADDR, I2C_QUIRK_FLAG }, - { 1, I2C2_BASE_ADDR, I2C_QUIRK_FLAG }, - { 2, I2C3_BASE_ADDR, I2C_QUIRK_FLAG }, -#elif defined(CONFIG_VF610) - { 0, I2C0_BASE_ADDR, I2C_QUIRK_FLAG }, -#elif defined(CONFIG_FSL_LSCH3) +#if defined(CONFIG_LS102XA) || defined(CONFIG_FSL_LSCH3) { 0, I2C1_BASE_ADDR, I2C_QUIRK_FLAG }, { 1, I2C2_BASE_ADDR, I2C_QUIRK_FLAG }, { 2, I2C3_BASE_ADDR, I2C_QUIRK_FLAG }, { 3, I2C4_BASE_ADDR, I2C_QUIRK_FLAG }, #else -#error "architecture not supported" + { 0, I2C1_BASE_ADDR, 0 }, + { 1, I2C2_BASE_ADDR, 0 }, + { 2, I2C3_BASE_ADDR, 0 }, + { 3, I2C4_BASE_ADDR, 0 }, #endif - { } }; struct mxc_i2c_bus *i2c_get_base(struct i2c_adapter *adap) |
