Add the ability to support multiple i2c bus for mv_i2c
Signed-off-by: Lei Wen leiwen@marvell.com --- Changelog: V2: NO CHANGE
V3: clean code style issue
V4: V5: NO CHANGE
drivers/i2c/mv_i2c.c | 36 +++++++++++++++++++++++++++++++++++- 1 files changed, 35 insertions(+), 1 deletions(-)
diff --git a/drivers/i2c/mv_i2c.c b/drivers/i2c/mv_i2c.c index 734148b..7a808c9 100644 --- a/drivers/i2c/mv_i2c.c +++ b/drivers/i2c/mv_i2c.c @@ -66,7 +66,35 @@ struct pxa_i2c { u32 isar; };
-static struct pxa_i2c *base = (struct pxa_i2c *)CONFIG_PXA_I2C_REG; +static struct pxa_i2c *base; +#ifdef CONFIG_I2C_MULTI_BUS +static u32 i2c_regs[CONFIG_PXA_I2C_NUM] = CONFIG_PXA_I2C_REG; +static unsigned int bus_initialized[CONFIG_PXA_I2C_NUM]; +static unsigned int current_bus; + +int i2c_set_bus_num(unsigned int bus) +{ + if ((bus < 0) || (bus >= CONFIG_PXA_I2C_NUM)) { + printf("Bad bus: %d\n", bus); + return -1; + } + + base = (struct pxa_i2c *)i2c_regs[bus]; + current_bus = bus; + + if (!bus_initialized[current_bus]) { + i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); + bus_initialized[current_bus] = 1; + } + + return 0; +} + +unsigned int i2c_get_bus_num(void) +{ + return current_bus; +} +#endif
/* * i2c_pxa_reset: - reset the host controller @@ -235,6 +263,12 @@ i2c_transfer_finish: /* ------------------------------------------------------------------------ */ void i2c_init(int speed, int slaveaddr) { +#ifdef CONFIG_I2C_MULTI_BUS + base = (struct pxa_i2c *)i2c_regs[current_bus]; +#else + base = (struct pxa_i2c *)CONFIG_PXA_I2C_REG; +#endif + #ifdef CONFIG_SYS_I2C_INIT_BOARD u32 icr; /* call board specific i2c bus reset routine before accessing the */