Add the ability to support multiple i2c bus for mv_i2c
Signed-off-by: Lei Wen <lei...@marvell.com>
---
Changelog:
V2:
NO CHANGE
V3:
clean code style issue
V4:
V5:
V6:
NO CHANGE
V7:
Make global change from PXA to MV
V8:
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 acc3193..d377d7e 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;
/*
--
1.7.0.4
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