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| author | Lei Wen <[leiwen@marvell.com]> | 2011-04-13 23:48:39 +0530 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2011-04-27 19:38:08 +0200 |
| commit | adb00bb6a05be8b1a64820becdc052513888b280 (patch) | |
| tree | 6c37a07d227ba8a556968105aaa78edd4d4ca3bd | |
| parent | aa3b168e317d7eb86968f60fcf105a3cb409bee5 (diff) | |
| download | u-boot-imx-adb00bb6a05be8b1a64820becdc052513888b280.zip u-boot-imx-adb00bb6a05be8b1a64820becdc052513888b280.tar.gz u-boot-imx-adb00bb6a05be8b1a64820becdc052513888b280.tar.bz2 | |
I2C: mv_i2c: add multi bus support
Add the ability to support multiple i2c bus for mv_i2c
Acked-by: Heiko Schocher <hs@denx.de>
Acked-by: Prafulla Wadaskar <prafulla@marvell.com>
Signed-off-by: Lei Wen <leiwen@marvell.com>
| -rw-r--r-- | 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 7ea66d4..dcbe1ae 100644 --- a/drivers/i2c/mv_i2c.c +++ b/drivers/i2c/mv_i2c.c @@ -66,7 +66,35 @@ struct mv_i2c { u32 isar; }; -static struct mv_i2c *base = (struct mv_i2c *)CONFIG_MV_I2C_REG; +static struct mv_i2c *base; +#ifdef CONFIG_I2C_MULTI_BUS +static u32 i2c_regs[CONFIG_MV_I2C_NUM] = CONFIG_MV_I2C_REG; +static unsigned int bus_initialized[CONFIG_MV_I2C_NUM]; +static unsigned int current_bus; + +int i2c_set_bus_num(unsigned int bus) +{ + if ((bus < 0) || (bus >= CONFIG_MV_I2C_NUM)) { + printf("Bad bus: %d\n", bus); + return -1; + } + + base = (struct mv_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_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 mv_i2c *)i2c_regs[current_bus]; +#else + base = (struct mv_i2c *)CONFIG_MV_I2C_REG; +#endif + #ifdef CONFIG_SYS_I2C_INIT_BOARD u32 icr; /* |