diff options
Diffstat (limited to 'drivers/i2c/tegra_i2c.c')
| -rw-r--r-- | drivers/i2c/tegra_i2c.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/drivers/i2c/tegra_i2c.c b/drivers/i2c/tegra_i2c.c index 3a94116831b..0f795091191 100644 --- a/drivers/i2c/tegra_i2c.c +++ b/drivers/i2c/tegra_i2c.c @@ -44,6 +44,15 @@ struct i2c_bus { enum periph_id periph_id; int speed; int pinmux_config; + + /* + * If non-zero, this I2C part has registers as described in + * 'struct dvc_ctlr' instead of 'struct i2c_ctlr'. On Tegra2, the + * "DVC" i2c controller has this. On Tegra3, none of the i2c + * controllers do. + */ + int use_dvc_ctlr; + struct i2c_control *control; struct i2c_ctlr *regs; }; @@ -140,7 +149,7 @@ static void set_packet_mode(struct i2c_bus *i2c_bus) config = bf_pack(I2C_CNFG_NEW_MASTER_FSM, 1) | bf_pack(I2C_CNFG_PACKET_MODE, 1); - if (i2c_bus->periph_id == PERIPH_ID_DVC_I2C) { + if (i2c_bus->use_dvc_ctlr) { struct dvc_ctlr *dvc = (struct dvc_ctlr *)i2c_bus->regs; writel(config, &dvc->cnfg); @@ -173,7 +182,7 @@ static void i2c_init_controller(struct i2c_bus *i2c_bus) i2c_reset_controller(i2c_bus); /* Configure I2C controller. */ - if (i2c_bus->periph_id == PERIPH_ID_DVC_I2C) { /* only for DVC I2C */ + if (i2c_bus->use_dvc_ctlr) { /* only for DVC I2C */ struct dvc_ctlr *dvc = (struct dvc_ctlr *)i2c_bus->regs; bf_writel(DVC_CTRL_REG3_I2C_HW_SW_PROG, 1, &dvc->ctrl3); @@ -422,6 +431,12 @@ static int i2c_get_config(int *index, struct i2c_bus *i2c_bus) i2c_bus->regs = (struct i2c_ctlr *)i2c_bus_base[i]; i2c_bus->speed = I2CSPEED_KHZ * 1000; +#ifdef CONFIG_TEGRA2 + i2c_bus->use_dvc_ctlr = (periph_id == PERIPH_ID_DVC_I2C); +#else + i2c_bus->use_dvc_ctlr = 0; +#endif + *index = i + 1; return 0; @@ -445,6 +460,7 @@ static int i2c_get_config(int *index, struct i2c_bus *i2c_bus) i2c_bus->pinmux_config = config.pinmux; i2c_bus->regs = config.reg; i2c_bus->speed = config.speed; + i2c_bus->use_dvc_ctlr = config.use_dvc_ctlr; return 0; } @@ -463,7 +479,7 @@ int i2c_init_board(void) i2c_get_config(&index, i2c_bus); - if (i2c_bus->periph_id == PERIPH_ID_DVC_I2C) + if (i2c_bus->use_dvc_ctlr) i2c_bus->control = &((struct dvc_ctlr *)i2c_bus->regs)->control; else |