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| author | Simon Glass <sjg@chromium.org> | 2014-02-27 13:26:14 -0700 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2014-03-17 20:05:48 -0600 |
| commit | b2a668b523ee78c56b466300350050924ed59553 (patch) | |
| tree | 6c330255f2ed40cb385de7f0ba2ed0d0541e962e /include/cros_ec.h | |
| parent | 86bf601d0414541d210d31fe44d44c85c5d0fee0 (diff) | |
| download | u-boot-imx-b2a668b523ee78c56b466300350050924ed59553.zip u-boot-imx-b2a668b523ee78c56b466300350050924ed59553.tar.gz u-boot-imx-b2a668b523ee78c56b466300350050924ed59553.tar.bz2 | |
cros_ec: Implement I2C pass-through
The Chrome EC has a feature where you can access its I2C buses through a
pass-through arrangement. Add a command to support this, and export the
function for it also.
Reviewed-by: Vadim Bendebury <vbendeb@google.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include/cros_ec.h')
| -rw-r--r-- | include/cros_ec.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/cros_ec.h b/include/cros_ec.h index 1b7c620..1e4d8db 100644 --- a/include/cros_ec.h +++ b/include/cros_ec.h @@ -501,4 +501,18 @@ int cros_ec_decode_ec_flash(const void *blob, struct fdt_cros_ec *config); */ void cros_ec_check_keyboard(struct cros_ec_dev *dev); +/* + * Tunnel an I2C transfer to the EC + * + * @param dev CROS-EC device + * @param chip Chip address (7-bit I2C address) + * @param addr Register address to read/write + * @param alen Length of register address in bytes + * @param buffer Buffer containing data to read/write + * @param len Length of buffer + * @param is_read 1 if this is a read, 0 if this is a write + */ +int cros_ec_i2c_xfer(struct cros_ec_dev *dev, uchar chip, uint addr, + int alen, uchar *buffer, int len, int is_read); + #endif |