diff options
| author |   Gwendal Grignou <gwendal@chromium.org> | 2019-11-19 13:45:45 +0100 |
|---|---|---|
| committer |   Enric Balletbo i Serra <enric.balletbo@collabora.com> | 2019-11-21 11:23:13 +0100 |
| commit | a16b2e28190255a0729c27902fa88fb8fff39bb0 (patch) | |
| tree | d60b0f6df3daffb6cc9aad7f76d0d79495208bae /drivers/mfd | |
| parent | platform/chrome: cros_ec: Put docs with the code (diff) | |
| download | linux-dev-a16b2e28190255a0729c27902fa88fb8fff39bb0.tar.xz linux-dev-a16b2e28190255a0729c27902fa88fb8fff39bb0.zip | |
mfd / platform: cros_ec: Add sensor_count and make check_features public
Add a new function to return the number of MEMS sensors available in a
ChromeOS Embedded Controller. It uses MOTIONSENSE_CMD_DUMP if available
or a specific memory map ACPI registers to find out.
Also, make check_features public as it can be useful for other drivers
to know what the Embedded Controller supports.
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/cros_ec_dev.c | 32 |
1 files changed, 0 insertions, 32 deletions
diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c index 6e6dfd6c1871..a35104e35cb4 100644 --- a/drivers/mfd/cros_ec_dev.c +++ b/drivers/mfd/cros_ec_dev.c @@ -112,38 +112,6 @@ static const struct mfd_cell cros_ec_vbc_cells[] = { { .name = "cros-ec-vbc", } }; -static int cros_ec_check_features(struct cros_ec_dev *ec, int feature) -{ - struct cros_ec_command *msg; - int ret; - - if (ec->features[0] == -1U && ec->features[1] == -1U) { - /* features bitmap not read yet */ - msg = kzalloc(sizeof(*msg) + sizeof(ec->features), GFP_KERNEL); - if (!msg) - return -ENOMEM; - - msg->command = EC_CMD_GET_FEATURES + ec->cmd_offset; - msg->insize = sizeof(ec->features); - - ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg); - if (ret < 0) { - dev_warn(ec->dev, "cannot get EC features: %d/%d\n", - ret, msg->result); - memset(ec->features, 0, sizeof(ec->features)); - } else { - memcpy(ec->features, msg->data, sizeof(ec->features)); - } - - dev_dbg(ec->dev, "EC features %08x %08x\n", - ec->features[0], ec->features[1]); - - kfree(msg); - } - - return ec->features[feature / 32] & EC_FEATURE_MASK_0(feature); -} - static void cros_ec_class_release(struct device *dev) { kfree(to_cros_ec_dev(dev)); |