From e31c1e50ac8d85ede3f62c438034397ba54734d7 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Mon, 2 Apr 2012 13:19:01 +0000 Subject: [PATCH] tegra: i2c: Add function to find DVC bus Add tegra_i2c_get_dvc_bus_num() to obtain the I2C bus number of DVC bus. This allows us to talk to the PMU. Signed-off-by: Simon Glass Signed-off-by: Tom Warren --- arch/arm/include/asm/arch-tegra2/tegra_i2c.h | 7 +++++++ drivers/i2c/tegra_i2c.c | 14 ++++++++++++++ 2 files changed, 21 insertions(+) diff --git a/arch/arm/include/asm/arch-tegra2/tegra_i2c.h b/arch/arm/include/asm/arch-tegra2/tegra_i2c.h index 0a7d99c585..cfb136c466 100644 --- a/arch/arm/include/asm/arch-tegra2/tegra_i2c.h +++ b/arch/arm/include/asm/arch-tegra2/tegra_i2c.h @@ -154,4 +154,11 @@ struct i2c_ctlr { #define I2C_INT_ARBITRATION_LOST_SHIFT 2 #define I2C_INT_ARBITRATION_LOST_MASK (1 << I2C_INT_ARBITRATION_LOST_SHIFT) +/** + * Returns the bus number of the DVC controller + * + * @return number of bus, or -1 if there is no DVC active + */ +int tegra_i2c_get_dvc_bus_num(void); + #endif diff --git a/drivers/i2c/tegra_i2c.c b/drivers/i2c/tegra_i2c.c index 21f6897269..5b6ea0e759 100644 --- a/drivers/i2c/tegra_i2c.c +++ b/drivers/i2c/tegra_i2c.c @@ -567,3 +567,17 @@ int i2c_set_bus_num(unsigned int bus) return 0; } #endif + +int tegra_i2c_get_dvc_bus_num(void) +{ + int i; + + for (i = 0; i < CONFIG_SYS_MAX_I2C_BUS; i++) { + struct i2c_bus *bus = &i2c_controllers[i]; + + if (bus->inited && bus->is_dvc) + return i; + } + + return -1; +} -- 2.25.1