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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: 06252ade91 ("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>
alistair/sunxi64-5.8
Amelie Delaunay 2020-04-22 11:08:31 +02:00 committed by Lee Jones
parent 7ff864e1ad
commit e583649d87
1 changed files with 7 additions and 0 deletions
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7
drivers/mfd/stmfx.c
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@ -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)