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| author | Armando Visconti <armando.visconti@st.com> | 2012-12-06 00:04:15 +0000 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2012-12-11 13:17:31 -0700 |
| commit | ac6e2fe6e4afe54a9c7ef0d93827a86e264814f2 (patch) | |
| tree | c5fa3f06752067c8d079c97573c72c111ce7ef3a /drivers/i2c/designware_i2c.c | |
| parent | c86d9ed3820bbd89e264261fb022bdf9448bfde7 (diff) | |
| download | u-boot-imx-ac6e2fe6e4afe54a9c7ef0d93827a86e264814f2.zip u-boot-imx-ac6e2fe6e4afe54a9c7ef0d93827a86e264814f2.tar.gz u-boot-imx-ac6e2fe6e4afe54a9c7ef0d93827a86e264814f2.tar.bz2 | |
designware_i2c.c: Added the support for MULTI_BUS
This patch adds the capability to switch between 10
different I2C busses (from 0 to 9).
Signed-off-by: Armando Visconti <armando.visconti@st.com>
Diffstat (limited to 'drivers/i2c/designware_i2c.c')
| -rw-r--r-- | drivers/i2c/designware_i2c.c | 82 |
1 files changed, 81 insertions, 1 deletions
diff --git a/drivers/i2c/designware_i2c.c b/drivers/i2c/designware_i2c.c index bf64a2a..4e4bfd4 100644 --- a/drivers/i2c/designware_i2c.c +++ b/drivers/i2c/designware_i2c.c @@ -26,7 +26,12 @@ #include <asm/arch/hardware.h> #include "designware_i2c.h" -static struct i2c_regs *const i2c_regs_p = +#ifdef CONFIG_I2C_MULTI_BUS +static unsigned int bus_initialized[CONFIG_SYS_I2C_BUS_MAX]; +static unsigned int current_bus = 0; +#endif + +static struct i2c_regs *i2c_regs_p = (struct i2c_regs *)CONFIG_SYS_I2C_BASE; /* @@ -150,6 +155,10 @@ void i2c_init(int speed, int slaveadd) enbl = readl(&i2c_regs_p->ic_enable); enbl |= IC_ENABLE_0B; writel(enbl, &i2c_regs_p->ic_enable); + +#ifdef CONFIG_I2C_MULTI_BUS + bus_initialized[current_bus] = 1; +#endif } /* @@ -344,3 +353,74 @@ int i2c_probe(uchar chip) return ret; } + +#ifdef CONFIG_I2C_MULTI_BUS +int i2c_set_bus_num(unsigned int bus) +{ + switch (bus) { + case 0: + i2c_regs_p = (void *)CONFIG_SYS_I2C_BASE; + break; +#ifdef CONFIG_SYS_I2C_BASE1 + case 1: + i2c_regs_p = (void *)CONFIG_SYS_I2C_BASE1; + break; +#endif +#ifdef CONFIG_SYS_I2C_BASE2 + case 2: + i2c_regs_p = (void *)CONFIG_SYS_I2C_BASE2; + break; +#endif +#ifdef CONFIG_SYS_I2C_BASE3 + case 3: + i2c_regs_p = (void *)CONFIG_SYS_I2C_BASE3; + break; +#endif +#ifdef CONFIG_SYS_I2C_BASE4 + case 4: + i2c_regs_p = (void *)CONFIG_SYS_I2C_BASE4; + break; +#endif +#ifdef CONFIG_SYS_I2C_BASE5 + case 5: + i2c_regs_p = (void *)CONFIG_SYS_I2C_BASE5; + break; +#endif +#ifdef CONFIG_SYS_I2C_BASE6 + case 6: + i2c_regs_p = (void *)CONFIG_SYS_I2C_BASE6; + break; +#endif +#ifdef CONFIG_SYS_I2C_BASE7 + case 7: + i2c_regs_p = (void *)CONFIG_SYS_I2C_BASE7; + break; +#endif +#ifdef CONFIG_SYS_I2C_BASE8 + case 8: + i2c_regs_p = (void *)CONFIG_SYS_I2C_BASE8; + break; +#endif +#ifdef CONFIG_SYS_I2C_BASE9 + case 9: + i2c_regs_p = (void *)CONFIG_SYS_I2C_BASE9; + break; +#endif + default: + printf("Bad bus: %d\n", bus); + return -1; + } + + current_bus = bus; + + if (!bus_initialized[current_bus]) + i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); + + return 0; +} + +int i2c_get_bus_num(void) +{ + return current_bus; +} +#endif |