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tegra124: i2c: Reset the controller when there's an error.

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This is the only way to clear the error bits in the controller. Without
clearing them, every future transaction will look like it failed.

BUG=chrome-os-partner:27220
TEST=Built and booted on nyan with the TPM frequency turned up to 400 KHz.
BRANCH=None

Original-Change-Id: Ib654e60ec3039ad9f5f96aa7288d3d877e5c843a
Original-Signed-off-by: Gabe Black <gabeblack@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/191811
Original-Reviewed-by: Tom Warren <twarren@nvidia.com>
Original-Reviewed-by: Gabe Black <gabeblack@chromium.org>
Original-Commit-Queue: Gabe Black <gabeblack@chromium.org>
Original-Tested-by: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit 7b19a095652f1561590dcca922b9f8c308d7de9d)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I301b6694cc521601b618973de891e4ed44c6a97d
Reviewed-on: http://review.coreboot.org/7460
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)
This commit is contained in:
Gabe Black
2014-03-26 21:43:53 -07:00
committed by Marc Jones
parent 8253bd912a
commit 6541b283b0
3 changed files with 48 additions and 9 deletions
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36
src/soc/nvidia/tegra124/i2c.c
View File

@@ -18,10 +18,38 @@
*/
#include <soc/addressmap.h>
#include <soc/clock.h>
#include <soc/nvidia/tegra/i2c.h>
void * const tegra_i2c_bases[TEGRA_I2C_BASE_COUNT] = {
(void *)TEGRA_I2C_BASE, (void *)TEGRA_I2C2_BASE,
(void *)TEGRA_I2C3_BASE, (void *)TEGRA_I2C4_BASE,
(void *)TEGRA_I2C5_BASE, (void *)TEGRA_I2C6_BASE
struct tegra_i2c_bus_info tegra_i2c_info[] = {
{
.base = (void *)TEGRA_I2C_BASE,
.reset_bit = CLK_L_I2C1,
.reset_func = &clock_reset_l
},
{
.base = (void *)TEGRA_I2C2_BASE,
.reset_bit = CLK_H_I2C2,
.reset_func = &clock_reset_h
},
{
.base = (void *)TEGRA_I2C3_BASE,
.reset_bit = CLK_U_I2C3,
.reset_func = &clock_reset_u
},
{
.base = (void *)TEGRA_I2C4_BASE,
.reset_bit = CLK_V_I2C4,
.reset_func = &clock_reset_v
},
{
.base = (void *)TEGRA_I2C5_BASE,
.reset_bit = CLK_H_I2C5,
.reset_func = &clock_reset_h
},
{
.base = (void *)TEGRA_I2C6_BASE,
.reset_bit = CLK_X_I2C6,
.reset_func = &clock_reset_x
}
};