| Message ID | 20210122191734.27584-1-digetx@gmail.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | [v1] power: supply: smb347-charger: Fix interrupt usage if interrupt is unavailable | expand |
Hi, On Fri, Jan 22, 2021 at 10:17:34PM +0300, Dmitry Osipenko wrote: > The IRQ=0 could be a valid interrupt number in kernel because interrupt > numbers are virtual in a modern kernel. Hence fix the interrupt usage in > a case if interrupt is unavailable by not overriding the interrupt number > which is used by the driver. > > Note that currently Nexus 7 is the only know device which uses SMB347 > kernel diver and it has a properly working interrupt, hence this patch > doesn't fix any real problems, it's a minor cleanup/improvement. > > Fixes: 99298de5df92 ("power: supply: smb347-charger: Replace mutex with IRQ disable/enable") > Signed-off-by: Dmitry Osipenko <digetx@gmail.com> > --- Thanks, queued. -- Sebastian > drivers/power/supply/smb347-charger.c | 12 ++++++++---- > 1 file changed, 8 insertions(+), 4 deletions(-) > > diff --git a/drivers/power/supply/smb347-charger.c b/drivers/power/supply/smb347-charger.c > index d3bf35ed12ce..8cfbd8d6b478 100644 > --- a/drivers/power/supply/smb347-charger.c > +++ b/drivers/power/supply/smb347-charger.c > @@ -137,6 +137,7 @@ > * @mains_online: is AC/DC input connected > * @usb_online: is USB input connected > * @charging_enabled: is charging enabled > + * @irq_unsupported: is interrupt unsupported by SMB hardware > * @max_charge_current: maximum current (in uA) the battery can be charged > * @max_charge_voltage: maximum voltage (in uV) the battery can be charged > * @pre_charge_current: current (in uA) to use in pre-charging phase > @@ -193,6 +194,7 @@ struct smb347_charger { > bool mains_online; > bool usb_online; > bool charging_enabled; > + bool irq_unsupported; > > unsigned int max_charge_current; > unsigned int max_charge_voltage; > @@ -862,6 +864,9 @@ static int smb347_irq_set(struct smb347_charger *smb, bool enable) > { > int ret; > > + if (smb->irq_unsupported) > + return 0; > + > ret = smb347_set_writable(smb, true); > if (ret < 0) > return ret; > @@ -923,8 +928,6 @@ static int smb347_irq_init(struct smb347_charger *smb, > ret = regmap_update_bits(smb->regmap, CFG_STAT, > CFG_STAT_ACTIVE_HIGH | CFG_STAT_DISABLED, > CFG_STAT_DISABLED); > - if (ret < 0) > - client->irq = 0; > > smb347_set_writable(smb, false); > > @@ -1345,6 +1348,7 @@ static int smb347_probe(struct i2c_client *client, > if (ret < 0) { > dev_warn(dev, "failed to initialize IRQ: %d\n", ret); > dev_warn(dev, "disabling IRQ support\n"); > + smb->irq_unsupported = true; > } else { > smb347_irq_enable(smb); > } > @@ -1357,8 +1361,8 @@ static int smb347_remove(struct i2c_client *client) > { > struct smb347_charger *smb = i2c_get_clientdata(client); > > - if (client->irq) > - smb347_irq_disable(smb); > + smb347_irq_disable(smb); > + > return 0; > } > > -- > 2.29.2 >
diff --git a/drivers/power/supply/smb347-charger.c b/drivers/power/supply/smb347-charger.c index d3bf35ed12ce..8cfbd8d6b478 100644 --- a/drivers/power/supply/smb347-charger.c +++ b/drivers/power/supply/smb347-charger.c @@ -137,6 +137,7 @@ * @mains_online: is AC/DC input connected * @usb_online: is USB input connected * @charging_enabled: is charging enabled + * @irq_unsupported: is interrupt unsupported by SMB hardware * @max_charge_current: maximum current (in uA) the battery can be charged * @max_charge_voltage: maximum voltage (in uV) the battery can be charged * @pre_charge_current: current (in uA) to use in pre-charging phase @@ -193,6 +194,7 @@ struct smb347_charger { bool mains_online; bool usb_online; bool charging_enabled; + bool irq_unsupported; unsigned int max_charge_current; unsigned int max_charge_voltage; @@ -862,6 +864,9 @@ static int smb347_irq_set(struct smb347_charger *smb, bool enable) { int ret; + if (smb->irq_unsupported) + return 0; + ret = smb347_set_writable(smb, true); if (ret < 0) return ret; @@ -923,8 +928,6 @@ static int smb347_irq_init(struct smb347_charger *smb, ret = regmap_update_bits(smb->regmap, CFG_STAT, CFG_STAT_ACTIVE_HIGH | CFG_STAT_DISABLED, CFG_STAT_DISABLED); - if (ret < 0) - client->irq = 0; smb347_set_writable(smb, false); @@ -1345,6 +1348,7 @@ static int smb347_probe(struct i2c_client *client, if (ret < 0) { dev_warn(dev, "failed to initialize IRQ: %d\n", ret); dev_warn(dev, "disabling IRQ support\n"); + smb->irq_unsupported = true; } else { smb347_irq_enable(smb); } @@ -1357,8 +1361,8 @@ static int smb347_remove(struct i2c_client *client) { struct smb347_charger *smb = i2c_get_clientdata(client); - if (client->irq) - smb347_irq_disable(smb); + smb347_irq_disable(smb); + return 0; }
The IRQ=0 could be a valid interrupt number in kernel because interrupt numbers are virtual in a modern kernel. Hence fix the interrupt usage in a case if interrupt is unavailable by not overriding the interrupt number which is used by the driver. Note that currently Nexus 7 is the only know device which uses SMB347 kernel diver and it has a properly working interrupt, hence this patch doesn't fix any real problems, it's a minor cleanup/improvement. Fixes: 99298de5df92 ("power: supply: smb347-charger: Replace mutex with IRQ disable/enable") Signed-off-by: Dmitry Osipenko <digetx@gmail.com> --- drivers/power/supply/smb347-charger.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-)