[PATCH v3] usb: typec: tcpm: add get max power support

[PATCH v3] usb: typec: tcpm: add get max power support

[Frank Wang]

Traverse fixed pdos to calculate the maximum power that the charger
can provide, and it can be get by POWER_SUPPLY_PROP_INPUT_POWER_LIMIT
property.

Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
---
 drivers/usb/typec/tcpm/tcpm.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index 13830b5e2d09f..db2636ef511bc 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -6320,6 +6320,27 @@ static int tcpm_psy_get_current_now(struct tcpm_port *port,
 	return 0;
 }
 
+static int tcpm_psy_get_input_power_limit(struct tcpm_port *port,
+					  union power_supply_propval *val)
+{
+	unsigned int src_mv, src_ma, max_src_uw = 0;
+	unsigned int i, tmp;
+
+	for (i = 0; i < port->nr_source_caps; i++) {
+		u32 pdo = port->source_caps[i];
+
+		if (pdo_type(pdo) == PDO_TYPE_FIXED) {
+			src_mv = pdo_fixed_voltage(pdo);
+			src_ma = pdo_max_current(pdo);
+			tmp = src_mv * src_ma;
+			max_src_uw = tmp > max_src_uw ? tmp : max_src_uw;
+		}
+	}
+
+	val->intval = max_src_uw;
+	return 0;
+}
+
 static int tcpm_psy_get_prop(struct power_supply *psy,
 			     enum power_supply_property psp,
 			     union power_supply_propval *val)
@@ -6349,6 +6370,9 @@ static int tcpm_psy_get_prop(struct power_supply *psy,
 	case POWER_SUPPLY_PROP_CURRENT_NOW:
 		ret = tcpm_psy_get_current_now(port, val);
 		break;
+	case POWER_SUPPLY_PROP_INPUT_POWER_LIMIT:
+		tcpm_psy_get_input_power_limit(port, val);
+		break;
 	default:
 		ret = -EINVAL;
 		break;
-- 
2.17.1

Re: [PATCH v3] usb: typec: tcpm: add get max power support

[Greg KH]

On Wed, Mar 22, 2023 at 05:31:20PM +0800, Frank Wang wrote:
> Traverse fixed pdos to calculate the maximum power that the charger
> can provide, and it can be get by POWER_SUPPLY_PROP_INPUT_POWER_LIMIT
> property.
> 
> Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
> ---
>  drivers/usb/typec/tcpm/tcpm.c | 24 ++++++++++++++++++++++++
>  1 file changed, 24 insertions(+)

What ever happened to this patch?

Frank, can you rebase it and resubmit?

thanks,

greg k-h

Re: [PATCH v3] usb: typec: tcpm: add get max power support

[Frank Wang]

Hi Greg,

On 2023/6/15 17:39, Greg KH wrote:
> On Wed, Mar 22, 2023 at 05:31:20PM +0800, Frank Wang wrote:
>> Traverse fixed pdos to calculate the maximum power that the charger
>> can provide, and it can be get by POWER_SUPPLY_PROP_INPUT_POWER_LIMIT
>> property.
>>
>> Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
>> ---
>>   drivers/usb/typec/tcpm/tcpm.c | 24 ++++++++++++++++++++++++
>>   1 file changed, 24 insertions(+)
> What ever happened to this patch?
>
> Frank, can you rebase it and resubmit?

Thanks for your reply, I shall resubmit it later.

BR.
Frank

> thanks,
>
> greg k-h

Re: [PATCH v3] usb: typec: tcpm: add get max power support

[Greg KH]

On Wed, Mar 22, 2023 at 05:31:20PM +0800, Frank Wang wrote:
> Traverse fixed pdos to calculate the maximum power that the charger
> can provide, and it can be get by POWER_SUPPLY_PROP_INPUT_POWER_LIMIT
> property.
> 
> Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
> ---
>  drivers/usb/typec/tcpm/tcpm.c | 24 ++++++++++++++++++++++++
>  1 file changed, 24 insertions(+)

What ever happened to this change?  Can you rebase and resubmit it
please?

thanks,

greg k-h