diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2021-08-01 16:31:04 +0300 |
|---|---|---|
| committer | Sebastian Reichel <sebastian.reichel@collabora.com> | 2021-08-05 19:54:52 +0300 |
| commit | 964b3e9b02bd89a17fdd108a2ecb053beba2b43f (patch) | |
| tree | c4efde6066558c05c16ad8faeb41fddc5ec5a4c9 /drivers/power | |
| parent | 394088f0b0668a1972b35fb25c54dedd1e89da7e (diff) | |
| download | linux-964b3e9b02bd89a17fdd108a2ecb053beba2b43f.tar.xz | |
power: supply: axp288_fuel_gauge: Move the AXP20X_CC_CTRL check together with the other checks
The I2C-bus to the XPower AXP288 is shared between the Linux kernel and
the SoCs P-Unit. The P-Unit has a semaphore which the kernel must "lock"
before it may use the bus. If not explicitly taken by the I2C-driver,
then this semaphore is automatically taken by the I2C-bus-driver for
each I2C-transfer.
Move the AXP20X_CC_CTRL check done in probe() together with the other
register-accesses done in probe, so that we can take the semaphore once
for the entire set of register-accesses.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/supply/axp288_fuel_gauge.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/drivers/power/supply/axp288_fuel_gauge.c b/drivers/power/supply/axp288_fuel_gauge.c index 8db8ab0827e4..016d8d6bec40 100644 --- a/drivers/power/supply/axp288_fuel_gauge.c +++ b/drivers/power/supply/axp288_fuel_gauge.c @@ -627,16 +627,6 @@ static int axp288_fuel_gauge_probe(struct platform_device *pdev) if (dmi_check_system(axp288_no_battery_list)) return -ENODEV; - /* - * On some devices the fuelgauge and charger parts of the axp288 are - * not used, check that the fuelgauge is enabled (CC_CTRL != 0). - */ - ret = regmap_read(axp20x->regmap, AXP20X_CC_CTRL, &val); - if (ret < 0) - return ret; - if (val == 0) - return -ENODEV; - info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); if (!info) return -ENOMEM; @@ -671,6 +661,18 @@ static int axp288_fuel_gauge_probe(struct platform_device *pdev) } } + /* + * On some devices the fuelgauge and charger parts of the axp288 are + * not used, check that the fuelgauge is enabled (CC_CTRL != 0). + */ + ret = regmap_read(axp20x->regmap, AXP20X_CC_CTRL, &val); + if (ret < 0) + goto out_free_iio_chan; + if (val == 0) { + ret = -ENODEV; + goto out_free_iio_chan; + } + ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG); if (ret < 0) goto out_free_iio_chan; |