Patchwork [U-Boot] i2c, mpc5xxx: add multibus support

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Submitter Heiko Schocher
Date Nov. 15, 2010, 7:34 a.m.
Message ID <1289806453-5474-1-git-send-email-hs@denx.de>
Download mbox | patch
Permalink /patch/71189/
State Accepted
Commit 0091337932130ebe9c0a64ac7ef922e9100353be
Delegated to: Heiko Schocher
Headers show

Comments

Heiko Schocher - Nov. 15, 2010, 7:34 a.m.
Tested on upcoming hydra (mpc5200 based) board.

Signed-off-by: Heiko Schocher <hs@denx.de>
---
 arch/powerpc/cpu/mpc5xxx/i2c.c |   43 ++++++++++++++++++++++++++++++++++++++++
 1 files changed, 43 insertions(+), 0 deletions(-)
Heiko Schocher - Nov. 18, 2010, 6:44 p.m.
Hello Heiko,

Heiko Schocher wrote:
> Tested on upcoming hydra (mpc5200 based) board.
> 
> Signed-off-by: Heiko Schocher <hs@denx.de>
> ---
>  arch/powerpc/cpu/mpc5xxx/i2c.c |   43 ++++++++++++++++++++++++++++++++++++++++
>  1 files changed, 43 insertions(+), 0 deletions(-)

Applied to u-boot-iwc.git.

bye,
Heiko

Patch

diff --git a/arch/powerpc/cpu/mpc5xxx/i2c.c b/arch/powerpc/cpu/mpc5xxx/i2c.c
index 4f7f716..9fb330f 100644
--- a/arch/powerpc/cpu/mpc5xxx/i2c.c
+++ b/arch/powerpc/cpu/mpc5xxx/i2c.c
@@ -30,6 +30,7 @@  DECLARE_GLOBAL_DATA_PTR;
 #include <mpc5xxx.h>
 #include <i2c.h>
 
+#if !defined(CONFIG_I2C_MULTI_BUS)
 #if (CONFIG_SYS_I2C_MODULE == 2)
 #define I2C_BASE	MPC5XXX_I2C2
 #elif (CONFIG_SYS_I2C_MODULE == 1)
@@ -37,6 +38,19 @@  DECLARE_GLOBAL_DATA_PTR;
 #else
 #error CONFIG_SYS_I2C_MODULE is not properly configured
 #endif
+#else
+static unsigned int i2c_bus_num __attribute__ ((section (".data"))) =
+						CONFIG_SYS_SPD_BUS_NUM;
+static unsigned int i2c_bus_speed[2] = {CONFIG_SYS_I2C_SPEED,
+					CONFIG_SYS_I2C_SPEED};
+
+static const  unsigned long i2c_dev[2] = {
+	MPC5XXX_I2C1,
+	MPC5XXX_I2C2,
+};
+
+#define I2C_BASE	((struct mpc5xxx_i2c *)i2c_dev[i2c_bus_num])
+#endif
 
 #define I2C_TIMEOUT	6667
 #define I2C_RETRIES	3
@@ -439,4 +453,33 @@  Done:
 	return ret;
 }
 
+#if defined(CONFIG_I2C_MULTI_BUS)
+int i2c_set_bus_num(unsigned int bus)
+{
+	if (bus > 1)
+		return -1;
+
+	i2c_bus_num = bus;
+	i2c_init(i2c_bus_speed[bus], CONFIG_SYS_I2C_SLAVE);
+	return 0;
+}
+
+int i2c_set_bus_speed(unsigned int speed)
+{
+	i2c_init(speed, CONFIG_SYS_I2C_SLAVE);
+	return 0;
+}
+
+unsigned int i2c_get_bus_num(void)
+{
+	return i2c_bus_num;
+}
+
+unsigned int i2c_get_bus_speed(void)
+{
+	return i2c_bus_speed[i2c_bus_num];
+}
+#endif
+
+
 #endif	/* CONFIG_HARD_I2C */