Commit e583649d authored Apr 22, 2020 by Amelie Delaunay Committed by Lee Jones May 26, 2020

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: 06252ade ("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>

parent 7ff864e1

drivers/mfd/stmfx.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -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)