>This patch adds PMIC configurations for low-battery
>monitoring by handling max77620 register CNFGGLBL1.
>
It might be an idea to add lbhyst configuration here and support using
custom lbdac values to specify a different cutoff point.
See: https://datasheetspdf.com/pdf-file/924230/Maxim/MAX8698C/1 pg 46
>Signed-off-by: Laxman Dewangan <[email protected]>
>Signed-off-by: Venkat Reddy Talla <[email protected]>
>Signed-off-by: Mark Zhang <[email protected]>
>---
> drivers/mfd/max77620.c | 57 +++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 56 insertions(+), 1 deletion(-)
>
>diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c
>index f58143103185..9e50d145afd8 100644
>--- a/drivers/mfd/max77620.c
>+++ b/drivers/mfd/max77620.c
>@@ -474,6 +474,57 @@ static int
max77620_init_backup_battery_charging(struct max77620_chip *chip)
> return ret;
> }
>
>+static int max77620_init_low_battery_monitor(struct max77620_chip *chip)
>+{
>+ struct device *dev = chip->dev;
>+ struct device_node *np;
>+ bool pval;
>+ u8 mask = 0;
>+ u8 val = 0;
>+ int ret;
>+
>+ np = of_get_child_by_name(dev->of_node, "low-battery-monitor");
>+ if (!np) {
>+ dev_info(dev, "Low battery monitoring support disabled\n");
>+ return 0;
>+ }
>+
>+ pval = of_property_read_bool(np, "maxim,low-battery-dac-enable");
>+ if (pval) {
>+ mask |= MAX77620_CNFGGLBL1_LBDAC_EN;
>+ val |= MAX77620_CNFGGLBL1_LBDAC_EN;
>+ }
>+
>+ pval = of_property_read_bool(np, "maxim,low-battery-dac-disable");
>+ if (pval)
>+ mask |= MAX77620_CNFGGLBL1_LBDAC_EN;
>+
>+ pval = of_property_read_bool(np, "maxim,low-battery-shutdown-enable");
>+ if (pval) {
>+ mask |= MAX77620_CNFGGLBL1_MPPLD;
>+ val |= MAX77620_CNFGGLBL1_MPPLD;
>+ }
>+
>+ pval = of_property_read_bool(np, "maxim,low-battery-shutdown-disable");
>+ if (pval)
>+ mask |= MAX77620_CNFGGLBL1_MPPLD;
>+
>+ pval = of_property_read_bool(np, "maxim,low-battery-reset-enable");
>+ if (pval) {
>+ mask |= MAX77620_CNFGGLBL1_LBRSTEN;
>+ val |= MAX77620_CNFGGLBL1_LBRSTEN;
>+ }
>+
>+ pval = of_property_read_bool(np, "maxim,low-battery-reset-disable");
>+ if (pval)
>+ mask |= MAX77620_CNFGGLBL1_LBRSTEN;
>+
>+ ret = regmap_update_bits(chip->rmap, MAX77620_REG_CNFGGLBL1, mask, val);
>+ if (ret < 0)
>+ dev_err(dev, "Reg CNFGGLBL1 update failed: %d\n", ret);
>+ return ret;
>+}
>+
> static int max77620_read_es_version(struct max77620_chip *chip)
> {
> unsigned int val;
>@@ -563,7 +614,11 @@ static int max77620_probe(struct i2c_client *client,
> if (ret < 0)
> return ret;
>
>- ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE,
>+ ret = max77620_init_low_battery_monitor(chip);
>+ if (ret < 0)
>+ return ret;
>+
>+ ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE,
> mfd_cells, n_mfd_cells, NULL, 0,
> regmap_irq_get_domain(chip->top_irq_data));
> if (ret < 0) {
On Sun, 27 Jan 2019, Billy Laws wrote:
> >This patch adds PMIC configurations for low-battery
> >monitoring by handling max77620 register CNFGGLBL1.
> >
> It might be an idea to add lbhyst configuration here and support using
> custom lbdac values to specify a different cutoff point.
Do you know why this email was sent independent of the original
submission? Something wrong with your mailer?
--
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
Re-sending due to dodgy looking 'reply-to'.
On Sun, 27 Jan 2019, Billy Laws wrote:
> >This patch adds PMIC configurations for low-battery
> >monitoring by handling max77620 register CNFGGLBL1.
> >
> It might be an idea to add lbhyst configuration here and support using
> custom lbdac values to specify a different cutoff point.
Do you know why this email was sent independent of the original
submission? Something wrong with your mailer?
--
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
On 1/28/19, Lee Jones <[email protected]> wrote:
> Re-sending due to dodgy looking 'reply-to'.
>
> On Sun, 27 Jan 2019, Billy Laws wrote:
>
>> >This patch adds PMIC configurations for low-battery
>> >monitoring by handling max77620 register CNFGGLBL1.
>> >
>> It might be an idea to add lbhyst configuration here and support using
>> custom lbdac values to specify a different cutoff point.
>
> Do you know why this email was sent independent of the original
> submission? Something wrong with your mailer?
>
I tried to add the reply to manually in thunderbird as I wasn't
subscribed to the mailing list, seems it didn't exactly work.
> --
> Lee Jones [李琼斯]
> Linaro Services Technical Lead
> Linaro.org │ Open source software for ARM SoCs
> Follow Linaro: Facebook | Twitter | Blog
>
On 1/27/2019 10:54 PM, Billy Laws wrote:
> >This patch adds PMIC configurations for low-battery
> >monitoring by handling max77620 register CNFGGLBL1.
> >
> It might be an idea to add lbhyst configuration here and support using
> custom lbdac values to specify a different cutoff point.
Yeah this patch doesn't have support to program LBHYST & LBDAC because
according to our experiences, we don't have requirement to modify them
when low battery monitor support added.
I think we can create a new patch to support these 2 fields in the future
when we really need them. Or you can create a patch if you have requirement
for them, is this OK to you Billy?
Mark
>
> See: https://datasheetspdf.com/pdf-file/924230/Maxim/MAX8698C/1 pg 46
> >Signed-off-by: Laxman Dewangan <[email protected]>
> >Signed-off-by: Venkat Reddy Talla <[email protected]>
> >Signed-off-by: Mark Zhang <[email protected]>
> >---
> > drivers/mfd/max77620.c | 57 +++++++++++++++++++++++++++++++++++++++++-
> > 1 file changed, 56 insertions(+), 1 deletion(-)
> >
> >diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c
> >index f58143103185..9e50d145afd8 100644
> >--- a/drivers/mfd/max77620.c
> >+++ b/drivers/mfd/max77620.c
> >@@ -474,6 +474,57 @@ static int
> max77620_init_backup_battery_charging(struct max77620_chip *chip)
> > return ret;
> > }
> >
> >+static int max77620_init_low_battery_monitor(struct max77620_chip *chip)
> >+{
> >+ struct device *dev = chip->dev;
> >+ struct device_node *np;
> >+ bool pval;
> >+ u8 mask = 0;
> >+ u8 val = 0;
> >+ int ret;
> >+
> >+ np = of_get_child_by_name(dev->of_node, "low-battery-monitor");
> >+ if (!np) {
> >+ dev_info(dev, "Low battery monitoring support disabled\n");
> >+ return 0;
> >+ }
> >+
> >+ pval = of_property_read_bool(np, "maxim,low-battery-dac-enable");
> >+ if (pval) {
> >+ mask |= MAX77620_CNFGGLBL1_LBDAC_EN;
> >+ val |= MAX77620_CNFGGLBL1_LBDAC_EN;
> >+ }
> >+
> >+ pval = of_property_read_bool(np, "maxim,low-battery-dac-disable");
> >+ if (pval)
> >+ mask |= MAX77620_CNFGGLBL1_LBDAC_EN;
> >+
> >+ pval = of_property_read_bool(np, "maxim,low-battery-shutdown-enable");
> >+ if (pval) {
> >+ mask |= MAX77620_CNFGGLBL1_MPPLD;
> >+ val |= MAX77620_CNFGGLBL1_MPPLD;
> >+ }
> >+
> >+ pval = of_property_read_bool(np, "maxim,low-battery-shutdown-disable");
> >+ if (pval)
> >+ mask |= MAX77620_CNFGGLBL1_MPPLD;
> >+
> >+ pval = of_property_read_bool(np, "maxim,low-battery-reset-enable");
> >+ if (pval) {
> >+ mask |= MAX77620_CNFGGLBL1_LBRSTEN;
> >+ val |= MAX77620_CNFGGLBL1_LBRSTEN;
> >+ }
> >+
> >+ pval = of_property_read_bool(np, "maxim,low-battery-reset-disable");
> >+ if (pval)
> >+ mask |= MAX77620_CNFGGLBL1_LBRSTEN;
> >+
> >+ ret = regmap_update_bits(chip->rmap, MAX77620_REG_CNFGGLBL1, mask, val);
> >+ if (ret < 0)
> >+ dev_err(dev, "Reg CNFGGLBL1 update failed: %d\n", ret);
> >+ return ret;
> >+}
> >+
> > static int max77620_read_es_version(struct max77620_chip *chip)
> > {
> > unsigned int val;
> >@@ -563,7 +614,11 @@ static int max77620_probe(struct i2c_client *client,
> > if (ret < 0)
> > return ret;
> >
> >- ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE,
> >+ ret = max77620_init_low_battery_monitor(chip);
> >+ if (ret < 0)
> >+ return ret;
> >+
> >+ ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE,
> > mfd_cells, n_mfd_cells, NULL, 0,
> > regmap_irq_get_domain(chip->top_irq_data));
> > if (ret < 0) {
>
Sure, that's fine with me, will send then this gets accepted. Two
other things: you should probably set the reg to 0 if the property
isn't specified as regmap_add_irqchip sets it to 0xff (basically all
enabled on highest limit), and you haven't updated the dt-bindings.
On Tue, Jan 29, 2019 at 6:52 AM Mark Zhang <[email protected]> wrote:
>
> On 1/27/2019 10:54 PM, Billy Laws wrote:
> > >This patch adds PMIC configurations for low-battery
> > >monitoring by handling max77620 register CNFGGLBL1.
> > >
> > It might be an idea to add lbhyst configuration here and support using
> > custom lbdac values to specify a different cutoff point.
>
> Yeah this patch doesn't have support to program LBHYST & LBDAC because
> according to our experiences, we don't have requirement to modify them
> when low battery monitor support added.
>
> I think we can create a new patch to support these 2 fields in the future
> when we really need them. Or you can create a patch if you have requirement
> for them, is this OK to you Billy?
>
> Mark
>
> >
> > See: https://datasheetspdf.com/pdf-file/924230/Maxim/MAX8698C/1 pg 46
> > >Signed-off-by: Laxman Dewangan <[email protected]>
> > >Signed-off-by: Venkat Reddy Talla <[email protected]>
> > >Signed-off-by: Mark Zhang <[email protected]>
> > >---
> > > drivers/mfd/max77620.c | 57 +++++++++++++++++++++++++++++++++++++++++-
> > > 1 file changed, 56 insertions(+), 1 deletion(-)
> > >
> > >diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c
> > >index f58143103185..9e50d145afd8 100644
> > >--- a/drivers/mfd/max77620.c
> > >+++ b/drivers/mfd/max77620.c
> > >@@ -474,6 +474,57 @@ static int
> > max77620_init_backup_battery_charging(struct max77620_chip *chip)
> > > return ret;
> > > }
> > >
> > >+static int max77620_init_low_battery_monitor(struct max77620_chip *chip)
> > >+{
> > >+ struct device *dev = chip->dev;
> > >+ struct device_node *np;
> > >+ bool pval;
> > >+ u8 mask = 0;
> > >+ u8 val = 0;
> > >+ int ret;
> > >+
> > >+ np = of_get_child_by_name(dev->of_node, "low-battery-monitor");
> > >+ if (!np) {
> > >+ dev_info(dev, "Low battery monitoring support disabled\n");
> > >+ return 0;
> > >+ }
> > >+
> > >+ pval = of_property_read_bool(np, "maxim,low-battery-dac-enable");
> > >+ if (pval) {
> > >+ mask |= MAX77620_CNFGGLBL1_LBDAC_EN;
> > >+ val |= MAX77620_CNFGGLBL1_LBDAC_EN;
> > >+ }
> > >+
> > >+ pval = of_property_read_bool(np, "maxim,low-battery-dac-disable");
> > >+ if (pval)
> > >+ mask |= MAX77620_CNFGGLBL1_LBDAC_EN;
> > >+
> > >+ pval = of_property_read_bool(np, "maxim,low-battery-shutdown-enable");
> > >+ if (pval) {
> > >+ mask |= MAX77620_CNFGGLBL1_MPPLD;
> > >+ val |= MAX77620_CNFGGLBL1_MPPLD;
> > >+ }
> > >+
> > >+ pval = of_property_read_bool(np, "maxim,low-battery-shutdown-disable");
> > >+ if (pval)
> > >+ mask |= MAX77620_CNFGGLBL1_MPPLD;
> > >+
> > >+ pval = of_property_read_bool(np, "maxim,low-battery-reset-enable");
> > >+ if (pval) {
> > >+ mask |= MAX77620_CNFGGLBL1_LBRSTEN;
> > >+ val |= MAX77620_CNFGGLBL1_LBRSTEN;
> > >+ }
> > >+
> > >+ pval = of_property_read_bool(np, "maxim,low-battery-reset-disable");
> > >+ if (pval)
> > >+ mask |= MAX77620_CNFGGLBL1_LBRSTEN;
> > >+
> > >+ ret = regmap_update_bits(chip->rmap, MAX77620_REG_CNFGGLBL1, mask, val);
> > >+ if (ret < 0)
> > >+ dev_err(dev, "Reg CNFGGLBL1 update failed: %d\n", ret);
> > >+ return ret;
> > >+}
> > >+
> > > static int max77620_read_es_version(struct max77620_chip *chip)
> > > {
> > > unsigned int val;
> > >@@ -563,7 +614,11 @@ static int max77620_probe(struct i2c_client *client,
> > > if (ret < 0)
> > > return ret;
> > >
> > >- ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE,
> > >+ ret = max77620_init_low_battery_monitor(chip);
> > >+ if (ret < 0)
> > >+ return ret;
> > >+
> > >+ ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE,
> > > mfd_cells, n_mfd_cells, NULL, 0,
> > > regmap_irq_get_domain(chip->top_irq_data));
> > > if (ret < 0) {
> >
Oh yeah will do, thanks.
-----邮件原件-----
发件人: Billy Laws <[email protected]>
发送时间: Tuesday, January 29, 2019 3:36 PM
收件人: Mark Zhang <[email protected]>
抄送: Lee Jones <[email protected]>; [email protected]; [email protected]; Laxman Dewangan <[email protected]>; Venkat Reddy Talla <[email protected]>
主题: Re: [2/2] mfd: max77620: Add low battery monitor support
Sure, that's fine with me, will send then this gets accepted. Two other things: you should probably set the reg to 0 if the property isn't specified as regmap_add_irqchip sets it to 0xff (basically all enabled on highest limit), and you haven't updated the dt-bindings.
On Tue, Jan 29, 2019 at 6:52 AM Mark Zhang <[email protected]> wrote:
>
> On 1/27/2019 10:54 PM, Billy Laws wrote:
> > >This patch adds PMIC configurations for low-battery >monitoring
> > by handling max77620 register CNFGGLBL1.
> > >
> > It might be an idea to add lbhyst configuration here and support
> > using custom lbdac values to specify a different cutoff point.
>
> Yeah this patch doesn't have support to program LBHYST & LBDAC because
> according to our experiences, we don't have requirement to modify them
> when low battery monitor support added.
>
> I think we can create a new patch to support these 2 fields in the
> future when we really need them. Or you can create a patch if you have
> requirement for them, is this OK to you Billy?
>
> Mark
>
> >
> > See: https://datasheetspdf.com/pdf-file/924230/Maxim/MAX8698C/1 pg
> > 46
> > >Signed-off-by: Laxman Dewangan <[email protected]>
> > >Signed-off-by: Venkat Reddy Talla <[email protected]>
> > >Signed-off-by: Mark Zhang <[email protected]>
> > >---
> > > drivers/mfd/max77620.c | 57
> > +++++++++++++++++++++++++++++++++++++++++-
> > > 1 file changed, 56 insertions(+), 1 deletion(-) > >diff --git
> > a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c >index
> > f58143103185..9e50d145afd8 100644
> > >--- a/drivers/mfd/max77620.c
> > >+++ b/drivers/mfd/max77620.c
> > >@@ -474,6 +474,57 @@ static int
> > max77620_init_backup_battery_charging(struct max77620_chip *chip) >
> > return ret; > } > >+static int
> > max77620_init_low_battery_monitor(struct max77620_chip *chip) >+{
> > >+ struct device *dev = chip->dev; >+ struct device_node *np; >+
> > bool pval; >+ u8 mask = 0; >+ u8 val = 0; >+ int ret; >+ >+ np
> > = of_get_child_by_name(dev->of_node, "low-battery-monitor"); >+ if
> > (!np) { >+ dev_info(dev, "Low battery monitoring support
> > disabled\n"); >+ return 0; >+ } >+ >+ pval =
> > of_property_read_bool(np, "maxim,low-battery-dac-enable"); >+ if
> > (pval) { >+ mask |= MAX77620_CNFGGLBL1_LBDAC_EN; >+ val |=
> > MAX77620_CNFGGLBL1_LBDAC_EN; >+ } >+ >+ pval =
> > of_property_read_bool(np, "maxim,low-battery-dac-disable"); >+ if
> > (pval) >+ mask |= MAX77620_CNFGGLBL1_LBDAC_EN; >+ >+ pval =
> > of_property_read_bool(np, "maxim,low-battery-shutdown-enable");
> > >+ if (pval) {
> > >+ mask |= MAX77620_CNFGGLBL1_MPPLD; >+ val |=
> > MAX77620_CNFGGLBL1_MPPLD; >+ } >+ >+ pval =
> > of_property_read_bool(np, "maxim,low-battery-shutdown-disable");
> > >+ if (pval)
> > >+ mask |= MAX77620_CNFGGLBL1_MPPLD; >+ >+ pval =
> > of_property_read_bool(np, "maxim,low-battery-reset-enable");
> > >+ if (pval) {
> > >+ mask |= MAX77620_CNFGGLBL1_LBRSTEN; >+ val |=
> > MAX77620_CNFGGLBL1_LBRSTEN; >+ } >+ >+ pval =
> > of_property_read_bool(np, "maxim,low-battery-reset-disable");
> > >+ if (pval)
> > >+ mask |= MAX77620_CNFGGLBL1_LBRSTEN; >+ >+ ret =
> > regmap_update_bits(chip->rmap, MAX77620_REG_CNFGGLBL1, mask, val);
> > >+ if (ret < 0) >+ dev_err(dev, "Reg CNFGGLBL1 update failed:
> > %d\n", ret); >+ return ret; >+} >+ > static int
> > max77620_read_es_version(struct max77620_chip *chip) > { >
> > unsigned int val; >@@ -563,7 +614,11 @@ static int
> > max77620_probe(struct i2c_client *client, > if (ret < 0) >
> > return ret; >
> > >- ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE, >+
> > ret = max77620_init_low_battery_monitor(chip);
> > >+ if (ret < 0)
> > >+ return ret;
> > >+
> > >+ ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE,
> > > mfd_cells, n_mfd_cells, NULL, 0,
> > > regmap_irq_get_domain(chip->top_irq_data));
> > > if (ret < 0) {
> >
On 1/29/2019 3:36 PM, Billy Laws wrote:
> Sure, that's fine with me, will send then this gets accepted. Two
> other things: you should probably set the reg to 0 if the property
> isn't specified as regmap_add_irqchip sets it to 0xff (basically all
> enabled on highest limit), and you haven't updated the dt-bindings.
Billy, v2 is out, dt-bindings patches are added.
But after a second thought, I don't think regmap_add_irqchip might set
registers to 0xff. I mean, for 2 registers which this patch set touches,
they're not IRQ registers(mask/status/...), so regmap_add_irqchip should
not touch them so I didn't make changes to driver codes in v2.
Mark
>
> On Tue, Jan 29, 2019 at 6:52 AM Mark Zhang <[email protected]> wrote:
>>
>> On 1/27/2019 10:54 PM, Billy Laws wrote:
>>> >This patch adds PMIC configurations for low-battery
>>> >monitoring by handling max77620 register CNFGGLBL1.
>>> >
>>> It might be an idea to add lbhyst configuration here and support using
>>> custom lbdac values to specify a different cutoff point.
>>
>> Yeah this patch doesn't have support to program LBHYST & LBDAC because
>> according to our experiences, we don't have requirement to modify them
>> when low battery monitor support added.
>>
>> I think we can create a new patch to support these 2 fields in the future
>> when we really need them. Or you can create a patch if you have requirement
>> for them, is this OK to you Billy?
>>
>> Mark
>>
>>>
>>> See: https://datasheetspdf.com/pdf-file/924230/Maxim/MAX8698C/1 pg 46
>>> >Signed-off-by: Laxman Dewangan <[email protected]>
>>> >Signed-off-by: Venkat Reddy Talla <[email protected]>
>>> >Signed-off-by: Mark Zhang <[email protected]>
>>> >---
>>> > drivers/mfd/max77620.c | 57 +++++++++++++++++++++++++++++++++++++++++-
>>> > 1 file changed, 56 insertions(+), 1 deletion(-)
>>> >
>>> >diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c
>>> >index f58143103185..9e50d145afd8 100644
>>> >--- a/drivers/mfd/max77620.c
>>> >+++ b/drivers/mfd/max77620.c
>>> >@@ -474,6 +474,57 @@ static int
>>> max77620_init_backup_battery_charging(struct max77620_chip *chip)
>>> > return ret;
>>> > }
>>> >
>>> >+static int max77620_init_low_battery_monitor(struct max77620_chip *chip)
>>> >+{
>>> >+ struct device *dev = chip->dev;
>>> >+ struct device_node *np;
>>> >+ bool pval;
>>> >+ u8 mask = 0;
>>> >+ u8 val = 0;
>>> >+ int ret;
>>> >+
>>> >+ np = of_get_child_by_name(dev->of_node, "low-battery-monitor");
>>> >+ if (!np) {
>>> >+ dev_info(dev, "Low battery monitoring support disabled\n");
>>> >+ return 0;
>>> >+ }
>>> >+
>>> >+ pval = of_property_read_bool(np, "maxim,low-battery-dac-enable");
>>> >+ if (pval) {
>>> >+ mask |= MAX77620_CNFGGLBL1_LBDAC_EN;
>>> >+ val |= MAX77620_CNFGGLBL1_LBDAC_EN;
>>> >+ }
>>> >+
>>> >+ pval = of_property_read_bool(np, "maxim,low-battery-dac-disable");
>>> >+ if (pval)
>>> >+ mask |= MAX77620_CNFGGLBL1_LBDAC_EN;
>>> >+
>>> >+ pval = of_property_read_bool(np, "maxim,low-battery-shutdown-enable");
>>> >+ if (pval) {
>>> >+ mask |= MAX77620_CNFGGLBL1_MPPLD;
>>> >+ val |= MAX77620_CNFGGLBL1_MPPLD;
>>> >+ }
>>> >+
>>> >+ pval = of_property_read_bool(np, "maxim,low-battery-shutdown-disable");
>>> >+ if (pval)
>>> >+ mask |= MAX77620_CNFGGLBL1_MPPLD;
>>> >+
>>> >+ pval = of_property_read_bool(np, "maxim,low-battery-reset-enable");
>>> >+ if (pval) {
>>> >+ mask |= MAX77620_CNFGGLBL1_LBRSTEN;
>>> >+ val |= MAX77620_CNFGGLBL1_LBRSTEN;
>>> >+ }
>>> >+
>>> >+ pval = of_property_read_bool(np, "maxim,low-battery-reset-disable");
>>> >+ if (pval)
>>> >+ mask |= MAX77620_CNFGGLBL1_LBRSTEN;
>>> >+
>>> >+ ret = regmap_update_bits(chip->rmap, MAX77620_REG_CNFGGLBL1, mask, val);
>>> >+ if (ret < 0)
>>> >+ dev_err(dev, "Reg CNFGGLBL1 update failed: %d\n", ret);
>>> >+ return ret;
>>> >+}
>>> >+
>>> > static int max77620_read_es_version(struct max77620_chip *chip)
>>> > {
>>> > unsigned int val;
>>> >@@ -563,7 +614,11 @@ static int max77620_probe(struct i2c_client *client,
>>> > if (ret < 0)
>>> > return ret;
>>> >
>>> >- ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE,
>>> >+ ret = max77620_init_low_battery_monitor(chip);
>>> >+ if (ret < 0)
>>> >+ return ret;
>>> >+
>>> >+ ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE,
>>> > mfd_cells, n_mfd_cells, NULL, 0,
>>> > regmap_irq_get_domain(chip->top_irq_data));
>>> > if (ret < 0) {
>>>
It does, see this article
https://blog.quendi.moe/2018/07/03/en-debugging-nintendo-switch-linux-power-management-battery-desync-edition/
On Tue, Jan 29, 2019 at 9:03 AM Mark Zhang <[email protected]> wrote:
>
> On 1/29/2019 3:36 PM, Billy Laws wrote:
> > Sure, that's fine with me, will send then this gets accepted. Two
> > other things: you should probably set the reg to 0 if the property
> > isn't specified as regmap_add_irqchip sets it to 0xff (basically all
> > enabled on highest limit), and you haven't updated the dt-bindings.
>
> Billy, v2 is out, dt-bindings patches are added.
> But after a second thought, I don't think regmap_add_irqchip might set
> registers to 0xff. I mean, for 2 registers which this patch set touches,
> they're not IRQ registers(mask/status/...), so regmap_add_irqchip should
> not touch them so I didn't make changes to driver codes in v2.
>
> Mark
>
> >
> > On Tue, Jan 29, 2019 at 6:52 AM Mark Zhang <[email protected]> wrote:
> >>
> >> On 1/27/2019 10:54 PM, Billy Laws wrote:
> >>> >This patch adds PMIC configurations for low-battery
> >>> >monitoring by handling max77620 register CNFGGLBL1.
> >>> >
> >>> It might be an idea to add lbhyst configuration here and support using
> >>> custom lbdac values to specify a different cutoff point.
> >>
> >> Yeah this patch doesn't have support to program LBHYST & LBDAC because
> >> according to our experiences, we don't have requirement to modify them
> >> when low battery monitor support added.
> >>
> >> I think we can create a new patch to support these 2 fields in the future
> >> when we really need them. Or you can create a patch if you have requirement
> >> for them, is this OK to you Billy?
> >>
> >> Mark
> >>
> >>>
> >>> See: https://datasheetspdf.com/pdf-file/924230/Maxim/MAX8698C/1 pg 46
> >>> >Signed-off-by: Laxman Dewangan <[email protected]>
> >>> >Signed-off-by: Venkat Reddy Talla <[email protected]>
> >>> >Signed-off-by: Mark Zhang <[email protected]>
> >>> >---
> >>> > drivers/mfd/max77620.c | 57 +++++++++++++++++++++++++++++++++++++++++-
> >>> > 1 file changed, 56 insertions(+), 1 deletion(-)
> >>> >
> >>> >diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c
> >>> >index f58143103185..9e50d145afd8 100644
> >>> >--- a/drivers/mfd/max77620.c
> >>> >+++ b/drivers/mfd/max77620.c
> >>> >@@ -474,6 +474,57 @@ static int
> >>> max77620_init_backup_battery_charging(struct max77620_chip *chip)
> >>> > return ret;
> >>> > }
> >>> >
> >>> >+static int max77620_init_low_battery_monitor(struct max77620_chip *chip)
> >>> >+{
> >>> >+ struct device *dev = chip->dev;
> >>> >+ struct device_node *np;
> >>> >+ bool pval;
> >>> >+ u8 mask = 0;
> >>> >+ u8 val = 0;
> >>> >+ int ret;
> >>> >+
> >>> >+ np = of_get_child_by_name(dev->of_node, "low-battery-monitor");
> >>> >+ if (!np) {
> >>> >+ dev_info(dev, "Low battery monitoring support disabled\n");
> >>> >+ return 0;
> >>> >+ }
> >>> >+
> >>> >+ pval = of_property_read_bool(np, "maxim,low-battery-dac-enable");
> >>> >+ if (pval) {
> >>> >+ mask |= MAX77620_CNFGGLBL1_LBDAC_EN;
> >>> >+ val |= MAX77620_CNFGGLBL1_LBDAC_EN;
> >>> >+ }
> >>> >+
> >>> >+ pval = of_property_read_bool(np, "maxim,low-battery-dac-disable");
> >>> >+ if (pval)
> >>> >+ mask |= MAX77620_CNFGGLBL1_LBDAC_EN;
> >>> >+
> >>> >+ pval = of_property_read_bool(np, "maxim,low-battery-shutdown-enable");
> >>> >+ if (pval) {
> >>> >+ mask |= MAX77620_CNFGGLBL1_MPPLD;
> >>> >+ val |= MAX77620_CNFGGLBL1_MPPLD;
> >>> >+ }
> >>> >+
> >>> >+ pval = of_property_read_bool(np, "maxim,low-battery-shutdown-disable");
> >>> >+ if (pval)
> >>> >+ mask |= MAX77620_CNFGGLBL1_MPPLD;
> >>> >+
> >>> >+ pval = of_property_read_bool(np, "maxim,low-battery-reset-enable");
> >>> >+ if (pval) {
> >>> >+ mask |= MAX77620_CNFGGLBL1_LBRSTEN;
> >>> >+ val |= MAX77620_CNFGGLBL1_LBRSTEN;
> >>> >+ }
> >>> >+
> >>> >+ pval = of_property_read_bool(np, "maxim,low-battery-reset-disable");
> >>> >+ if (pval)
> >>> >+ mask |= MAX77620_CNFGGLBL1_LBRSTEN;
> >>> >+
> >>> >+ ret = regmap_update_bits(chip->rmap, MAX77620_REG_CNFGGLBL1, mask, val);
> >>> >+ if (ret < 0)
> >>> >+ dev_err(dev, "Reg CNFGGLBL1 update failed: %d\n", ret);
> >>> >+ return ret;
> >>> >+}
> >>> >+
> >>> > static int max77620_read_es_version(struct max77620_chip *chip)
> >>> > {
> >>> > unsigned int val;
> >>> >@@ -563,7 +614,11 @@ static int max77620_probe(struct i2c_client *client,
> >>> > if (ret < 0)
> >>> > return ret;
> >>> >
> >>> >- ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE,
> >>> >+ ret = max77620_init_low_battery_monitor(chip);
> >>> >+ if (ret < 0)
> >>> >+ return ret;
> >>> >+
> >>> >+ ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE,
> >>> > mfd_cells, n_mfd_cells, NULL, 0,
> >>> > regmap_irq_get_domain(chip->top_irq_data));
> >>> > if (ret < 0) {
> >>>
Oh I know that issue and it should be fixed by:
https://marc.info/?l=linux-kernel&m=154745840513141&w=3
The root cause is that max77620 doesn't have a dedicated gpio interrupt mask register,
so the "mask_base" of max77620 gpio driver is 0, that's why regmap_add_irq_chip writes 0xFF
to offset zero.
Mark
-----邮件原件-----
发件人: Billy Laws <[email protected]>
发送时间: Tuesday, January 29, 2019 9:34 PM
收件人: Mark Zhang <[email protected]>
抄送: Lee Jones <[email protected]>; [email protected]; [email protected]; Laxman Dewangan <[email protected]>; Venkat Reddy Talla <[email protected]>
主题: Re: [2/2] mfd: max77620: Add low battery monitor support
It does, see this article
https://blog.quendi.moe/2018/07/03/en-debugging-nintendo-switch-linux-power-management-battery-desync-edition/
On Tue, Jan 29, 2019 at 9:03 AM Mark Zhang <[email protected]> wrote:
>
> On 1/29/2019 3:36 PM, Billy Laws wrote:
> > Sure, that's fine with me, will send then this gets accepted. Two
> > other things: you should probably set the reg to 0 if the property
> > isn't specified as regmap_add_irqchip sets it to 0xff (basically all
> > enabled on highest limit), and you haven't updated the dt-bindings.
>
> Billy, v2 is out, dt-bindings patches are added.
> But after a second thought, I don't think regmap_add_irqchip might set
> registers to 0xff. I mean, for 2 registers which this patch set
> touches, they're not IRQ registers(mask/status/...), so
> regmap_add_irqchip should not touch them so I didn't make changes to driver codes in v2.
>
> Mark
>
> >
> > On Tue, Jan 29, 2019 at 6:52 AM Mark Zhang <[email protected]> wrote:
> >>
> >> On 1/27/2019 10:54 PM, Billy Laws wrote:
> >>> >This patch adds PMIC configurations for low-battery >monitoring
> >>> by handling max77620 register CNFGGLBL1.
> >>> >
> >>> It might be an idea to add lbhyst configuration here and support
> >>> using custom lbdac values to specify a different cutoff point.
> >>
> >> Yeah this patch doesn't have support to program LBHYST & LBDAC
> >> because according to our experiences, we don't have requirement to
> >> modify them when low battery monitor support added.
> >>
> >> I think we can create a new patch to support these 2 fields in the
> >> future when we really need them. Or you can create a patch if you
> >> have requirement for them, is this OK to you Billy?
> >>
> >> Mark
> >>
> >>>
> >>> See: https://datasheetspdf.com/pdf-file/924230/Maxim/MAX8698C/1
> >>> pg 46
> >>> >Signed-off-by: Laxman Dewangan <[email protected]>
> >>> >Signed-off-by: Venkat Reddy Talla <[email protected]>
> >>> >Signed-off-by: Mark Zhang <[email protected]>
> >>> >---
> >>> > drivers/mfd/max77620.c | 57
> >>> +++++++++++++++++++++++++++++++++++++++++-
> >>> > 1 file changed, 56 insertions(+), 1 deletion(-) > >diff --git
> >>> a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c >index
> >>> f58143103185..9e50d145afd8 100644
> >>> >--- a/drivers/mfd/max77620.c
> >>> >+++ b/drivers/mfd/max77620.c
> >>> >@@ -474,6 +474,57 @@ static int
> >>> max77620_init_backup_battery_charging(struct max77620_chip *chip)
> >>> > return ret; > } > >+static int
> >>> max77620_init_low_battery_monitor(struct max77620_chip *chip) >+{
> >>> >+ struct device *dev = chip->dev; >+ struct device_node *np; >+
> >>> bool pval; >+ u8 mask = 0; >+ u8 val = 0; >+ int ret; >+ >+
> >>> np = of_get_child_by_name(dev->of_node, "low-battery-monitor");
> >>> >+ if (!np) { >+ dev_info(dev, "Low battery monitoring support
> >>> disabled\n"); >+ return 0; >+ } >+ >+ pval =
> >>> of_property_read_bool(np, "maxim,low-battery-dac-enable"); >+ if
> >>> (pval) { >+ mask |= MAX77620_CNFGGLBL1_LBDAC_EN; >+ val |=
> >>> MAX77620_CNFGGLBL1_LBDAC_EN; >+ } >+ >+ pval =
> >>> of_property_read_bool(np, "maxim,low-battery-dac-disable"); >+ if
> >>> (pval) >+ mask |= MAX77620_CNFGGLBL1_LBDAC_EN; >+ >+ pval =
> >>> of_property_read_bool(np, "maxim,low-battery-shutdown-enable");
> >>> >+ if (pval) {
> >>> >+ mask |= MAX77620_CNFGGLBL1_MPPLD; >+ val |=
> >>> MAX77620_CNFGGLBL1_MPPLD; >+ } >+ >+ pval =
> >>> of_property_read_bool(np, "maxim,low-battery-shutdown-disable");
> >>> >+ if (pval)
> >>> >+ mask |= MAX77620_CNFGGLBL1_MPPLD; >+ >+ pval =
> >>> of_property_read_bool(np, "maxim,low-battery-reset-enable");
> >>> >+ if (pval) {
> >>> >+ mask |= MAX77620_CNFGGLBL1_LBRSTEN; >+ val |=
> >>> MAX77620_CNFGGLBL1_LBRSTEN; >+ } >+ >+ pval =
> >>> of_property_read_bool(np, "maxim,low-battery-reset-disable");
> >>> >+ if (pval)
> >>> >+ mask |= MAX77620_CNFGGLBL1_LBRSTEN; >+ >+ ret =
> >>> regmap_update_bits(chip->rmap, MAX77620_REG_CNFGGLBL1, mask, val);
> >>> >+ if (ret < 0) >+ dev_err(dev, "Reg CNFGGLBL1 update failed:
> >>> %d\n", ret); >+ return ret; >+} >+ > static int
> >>> max77620_read_es_version(struct max77620_chip *chip) > { >
> >>> unsigned int val; >@@ -563,7 +614,11 @@ static int
> >>> max77620_probe(struct i2c_client *client, > if (ret < 0) >
> >>> return ret; >
> >>> >- ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE,
> >>> >+ ret = max77620_init_low_battery_monitor(chip);
> >>> >+ if (ret < 0)
> >>> >+ return ret;
> >>> >+
> >>> >+ ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE,
> >>> > mfd_cells, n_mfd_cells, NULL, 0,
> >>> > regmap_irq_get_domain(chip->top_irq_data));
> >>> > if (ret < 0) {
> >>>