diff options
| author | Simon Glass <sjg@chromium.org> | 2021-01-16 14:52:28 -0700 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2021-01-30 14:25:41 -0700 |
| commit | 3a6c994f3896d66e617acdf9bb58ffc4def08b71 (patch) | |
| tree | d8b222358a56ab098e8a66a3f09a5b2b0d0066ee /drivers/misc/cros_ec_lpc.c | |
| parent | 2b4b65339110e11b4a859fceeb1eec82b2ebb5f1 (diff) | |
cros_ec: Add support for switches
On x86 platforms the EC provides a way to read 'switches', which are
on/off values determined by the EC.
Add a new driver method for this and implement it for LPC.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/misc/cros_ec_lpc.c')
| -rw-r--r-- | drivers/misc/cros_ec_lpc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/misc/cros_ec_lpc.c b/drivers/misc/cros_ec_lpc.c index e0002b9753..f40375978d 100644 --- a/drivers/misc/cros_ec_lpc.c +++ b/drivers/misc/cros_ec_lpc.c @@ -207,6 +207,12 @@ int cros_ec_lpc_init(struct cros_ec_dev *dev, const void *blob) return 0; } +/* Return the byte of EC switch states */ +static int cros_ec_lpc_get_switches(struct udevice *dev) +{ + return inb(EC_LPC_ADDR_MEMMAP + EC_MEMMAP_SWITCHES); +} + /* * Test if LPC command args are supported. * @@ -239,6 +245,7 @@ static struct dm_cros_ec_ops cros_ec_ops = { .packet = cros_ec_lpc_packet, .command = cros_ec_lpc_command, .check_version = cros_ec_lpc_check_version, + .get_switches = cros_ec_lpc_get_switches, }; static const struct udevice_id cros_ec_ids[] = { |