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authorLei Wen <[leiwen@marvell.com]>2011-04-13 23:48:39 +0530
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2011-04-27 19:38:08 +0200
commitadb00bb6a05be8b1a64820becdc052513888b280 (patch)
tree6c37a07d227ba8a556968105aaa78edd4d4ca3bd
parentaa3b168e317d7eb86968f60fcf105a3cb409bee5 (diff)
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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.c36
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;
/*