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| author | YongBeum.Ha <ybha@samsung.corp-partner.google.com> | 2021-04-02 13:57:47 +0900 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2021-04-09 08:11:01 +0000 |
| commit | 11e06eeb1e2e9fd916e1547bbcd83043dd4904bc (patch) | |
| tree | b4cad41bf8d33199e7d636d0f911c289f2939bee /driver/usb_mux/ps8743.c | |
| parent | eac9be84b505bdb32052a2dbe1bb418a6279841a (diff) | |
| download | chrome-ec-11e06eeb1e2e9fd916e1547bbcd83043dd4904bc.tar.gz | |
ps8743 : get chip ID
Add read function to get chip id
BUG=b:182596801
BRANCH=none
TEST=make -j BOARD=sasuke
Signed-off-by: YongBeum.Ha <ybha@samsung.corp-partner.google.com>
Change-Id: Icf33030a7f013a85fe27e8c8c54b8e4494a01817
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2801176
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
Diffstat (limited to 'driver/usb_mux/ps8743.c')
| -rw-r--r-- | driver/usb_mux/ps8743.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/driver/usb_mux/ps8743.c b/driver/usb_mux/ps8743.c index 264b79fecc..68bb0428d3 100644 --- a/driver/usb_mux/ps8743.c +++ b/driver/usb_mux/ps8743.c @@ -23,6 +23,28 @@ int ps8743_write(const struct usb_mux *me, uint8_t reg, uint8_t val) reg, val); } +int ps8743_check_chip_id(const struct usb_mux *me, int *val) +{ + int id1; + int id2; + int res; + + /* + * Verify chip ID registers. + */ + res = ps8743_read(me, PS8743_REG_CHIP_ID1, &id1); + if (res) + return res; + + res = ps8743_read(me, PS8743_REG_CHIP_ID2, &id2); + if (res) + return res; + + *val = (id2 << 8) + id1; + + return EC_SUCCESS; +} + static int ps8743_init(const struct usb_mux *me) { int id1; |