Re: [PATCH v5 1/3] power_supply: Add Standard, Adaptive, and Custom charge types

Enric Balletbo i Serra
2019-04-23T13:56:01Z

On 18/4/19 18:43, Nick Crews wrote:
> Add "Standard", "Adaptive", and "Custom" modes to the charge_type
> property, to expand the existing "Trickle" and "Fast" modes.
> I am adding them in order to support a new Chrome OS device,
> but these properties should be general enough that they can be
> used on other devices.
>
> The meaning of "Standard" is obvious, but "Adaptive" and "Custom" are
> more tricky: "Adaptive" means that the charge controller uses some
> custom algorithm to change the charge type automatically, with no
> configuration needed. "Custom" means that the charge controller uses the
> POWER_SUPPLY_PROP_CHARGE_CONTROL_* properties as configuration for some
> other algorithm.
>
> v5 changes:
> - Split up adding the charge types and adding the
> POWER_SUPPLY_PROP_CHARGE_CONTROL_START_THRESHOLD and
> POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD properties into
> two different commits.
> v4 changes:
> - Add documentation for the new properties, and add documentation for
> the the previously missing charge_control_limit and
> charge_control_limit_max properties.
>
> Signed-off-by: Nick Crews <ncrews@chromium.org>

Reviewed-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>

> ---
> Documentation/ABI/testing/sysfs-class-power | 12 +++++++++---
> drivers/power/supply/power_supply_sysfs.c | 2 +-
> include/linux/power_supply.h | 8 ++++++--
> 3 files changed, 16 insertions(+), 6 deletions(-)
>
> diff --git a/Documentation/ABI/testing/sysfs-class-power b/Documentation/ABI/testing/sysfs-class-power
> index 5e23e22dce1b..544c4e0ef8b6 100644
> --- a/Documentation/ABI/testing/sysfs-class-power
> +++ b/Documentation/ABI/testing/sysfs-class-power
> @@ -119,10 +119,16 @@ Date: July 2009
> Contact: linux-pm@vger.kernel.org
> Description:
> Represents the type of charging currently being applied to the
> - battery.
> + battery. "Trickle", "Fast", and "Standard" all mean different
> + charging speeds. "Adaptive" means that the charger uses some
> + algorithm to adjust the charge rate dynamically, without
> + any user configuration required. "Custom" means that the charger
> + uses the charge_control_* properties as configuration for some
> + different algorithm.
>
> - Access: Read
> - Valid values: "Unknown", "N/A", "Trickle", "Fast"
> + Access: Read, Write
> + Valid values: "Unknown", "N/A", "Trickle", "Fast", "Standard",
> + "Adaptive", "Custom"
>
> What: /sys/class/power_supply/<supply_name>/charge_term_current
> Date: July 2014
> diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c
> index dce24f596160..64dff5cfecc3 100644
> --- a/drivers/power/supply/power_supply_sysfs.c
> +++ b/drivers/power/supply/power_supply_sysfs.c
> @@ -56,7 +56,7 @@ static const char * const power_supply_status_text[] = {
> };
>
> static const char * const power_supply_charge_type_text[] = {
> - "Unknown", "N/A", "Trickle", "Fast"
> + "Unknown", "N/A", "Trickle", "Fast", "Standard", "Adaptive", "Custom"
> };
>
> static const char * const power_supply_health_text[] = {
> diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
> index 2f9c201a54d1..e86e05d8134d 100644
> --- a/include/linux/power_supply.h
> +++ b/include/linux/power_supply.h
> @@ -40,11 +40,15 @@ enum {
> POWER_SUPPLY_STATUS_FULL,
> };
>
> +/* What algorithm is the charger using? */
> enum {
> POWER_SUPPLY_CHARGE_TYPE_UNKNOWN = 0,
> POWER_SUPPLY_CHARGE_TYPE_NONE,
> - POWER_SUPPLY_CHARGE_TYPE_TRICKLE,
> - POWER_SUPPLY_CHARGE_TYPE_FAST,
> + POWER_SUPPLY_CHARGE_TYPE_TRICKLE, /* slow speed */
> + POWER_SUPPLY_CHARGE_TYPE_FAST, /* fast speed */
> + POWER_SUPPLY_CHARGE_TYPE_STANDARD, /* normal speed */
> + POWER_SUPPLY_CHARGE_TYPE_ADAPTIVE, /* dynamically adjusted speed */
> + POWER_SUPPLY_CHARGE_TYPE_CUSTOM, /* use CHARGE_CONTROL_* props */
> };
>
> enum {
>