diff options
| author | Amelie Delaunay <amelie.delaunay@st.com> | 2020-04-22 11:08:31 +0200 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2020-05-26 10:51:20 +0100 |
| commit | e583649d87ec090444aa5347af0927cd6e8581ae (patch) | |
| tree | ac6530a4749ad3f55a41aa69f8e837cc16065eae /drivers/mfd/stmfx.c | |
| parent | 7ff864e1ad343dc0960f454a58af48883c5f0f5d (diff) | |
| download | linux-e583649d87ec090444aa5347af0927cd6e8581ae.tar.bz2 | |
mfd: stmfx: Reset chip on resume as supply was disabled
STMFX supply is disabled during suspend. To avoid a too early access to
the STMFX firmware on resume, reset the chip and wait for its firmware to
be loaded.
Fixes: 06252ade9156 ("mfd: Add ST Multi-Function eXpander (STMFX) core driver")
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd/stmfx.c')
| -rw-r--r-- | drivers/mfd/stmfx.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/mfd/stmfx.c b/drivers/mfd/stmfx.c index 857991cb3cbb..fde6541e347c 100644 --- a/drivers/mfd/stmfx.c +++ b/drivers/mfd/stmfx.c @@ -501,6 +501,13 @@ static int stmfx_resume(struct device *dev) } } + /* Reset STMFX - supply has been stopped during suspend */ + ret = stmfx_chip_reset(stmfx); + if (ret) { + dev_err(stmfx->dev, "Failed to reset chip: %d\n", ret); + return ret; + } + ret = regmap_raw_write(stmfx->map, STMFX_REG_SYS_CTRL, &stmfx->bkp_sysctrl, sizeof(stmfx->bkp_sysctrl)); if (ret) |