Re: v4.10-rc4 to v4.10-rc5: battery regression on Nokia N900

Pavel Machek
2017-01-23T23:26:54Z

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Hi!

> > >I'll try to revert it on the top of v4.10-rc5 now... and yes, it fixes
> > >the issue.
> > >
> > >Any idea what went wrong and how to fix that?
> > >
> > >Anyway as we are at -rc5 and this is warning fix that caused a
> > >regression on different hardware... it should be reverted.
> > >
> > Agreed.
> >
> > What exactly does "stopped working" mean ? That might help understanding
> > what went wrong.
>
> /sys files related to battery no longer appear. I beieve this has
> something to do with it:
>
> [ 2.374877] of_get_named_gpiod_flags: parsed 'reset-gpios' property
> of node '/ocp@68000000/spi@48098000/tsc2005@0[0]' - status (0)
> [ 2.375946] input: TSC2005 touchscreen as
> /devices/platform/68000000.ocp/48098000.spi/spi_master/spi1/spi1.0/input/input5
> [ 2.392120] rx51-battery: probe of n900-battery failed with error
> -22

Mystery solved:

diff --git a/drivers/hwmon/hwmon.c b/drivers/hwmon/hwmon.c
index 3932f92..fe5ec82 100644
--- a/drivers/hwmon/hwmon.c
+++ b/drivers/hwmon/hwmon.c
@@ -545,8 +545,10 @@ __hwmon_device_register(struct device *dev, const char *name, void *drvdata,
int i, j, err, id;

/* Do not accept invalid characters in hwmon name attribute */
- if (name && (!strlen(name) || strpbrk(name, "-* \t\n")))
+ if (name && (!strlen(name) || strpbrk(name, "-* \t\n"))) {
+ printk("hwmon: Invalid character detected: %s\n", name);
return ERR_PTR(-EINVAL);
+ }

id = ida_simple_get(&hwmon_ida, 0, 0, GFP_KERNEL);
if (id < 0)

pavel@n900:~$ dmesg | grep -5 Invalid
[ 0.829650] of_get_named_gpiod_flags: parsed 'gpio-reset' property
of node '/ocp@68000000/i2c@48072000/tlv320aic3x@19[0]' - status (0)
[ 0.833831] tsl2563 2-0029: model 7, rev. 0
[ 0.837768] of_get_named_gpiod_flags: parsed 'enable-gpio' property
of node '/ocp@68000000/i2c@48072000/lp5523@32[0]' - status (0)
[ 1.921417] omap_i2c 48072000.i2c: controller timed out
[ 2.056823] lp5523x 2-0032: lp5523 Programmable led chip found
[ 2.064147] hwmon: Invalid character detected: bq27200-0
[ 2.064544] bq27xxx-battery 2-0055: failed to register battery
[ 2.064605] bq27xxx-battery: probe of 2-0055 failed with error -22
[ 2.065368] of_get_named_gpiod_flags: parsed 'power-gpio' property
of node '/ocp@68000000/i2c@48072000/tpa6130a2@60[0]' - status (0)
[ 2.083221] bq2415x-charger 2-006b: automode supported, waiting for
events
[ 2.084442] bq2415x-charger 2-006b: driver registered
--
[ 2.369842] g_ether gadget: g_ether ready
[ 2.377197] tsc2005 spi1.0: GPIO lookup for consumer reset
[ 2.377227] tsc2005 spi1.0: using device tree for GPIO lookup
[ 2.377288] of_get_named_gpiod_flags: parsed 'reset-gpios' property
of node '/ocp@68000000/spi@48098000/tsc2005@0[0]' - status (0)
[ 2.378936] input: TSC2005 touchscreen as
/devices/platform/68000000.ocp/48098000.spi/spi_master/spi1/spi1.0/input/input5
[ 2.395111] hwmon: Invalid character detected: rx51-battery
[ 2.402587] rx51-battery: probe of n900-battery failed with error
-22
[ 2.410247] omap_hsmmc 4809c000.mmc: GPIO lookup for consumer cd
[ 2.410247] omap_hsmmc 4809c000.mmc: using device tree for GPIO
lookup
[ 2.410278] of_get_named_gpiod_flags: can't parse 'cd-gpios'
property of node '/ocp@68000000/mmc@4809c000[0]'
[ 2.410278] of_get_named_gpiod_flags: can't parse 'cd-gpio'
property of node '/ocp@68000000/mmc@4809c000[0]'

Pavel

--
(english) http://www.livejournal.com/~pavelmachek
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