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Thu, 18 Sep 2025 10:06:55 -0700 (PDT) From: Dzmitry Sankouski Date: Thu, 18 Sep 2025 20:06:50 +0300 Subject: [PATCH v4 6/9] power: supply: max77705_charger: add writable properties Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250918-max77705_77976_charger_improvement-v4-6-11ec9188f489@gmail.com> References: <20250918-max77705_77976_charger_improvement-v4-0-11ec9188f489@gmail.com> In-Reply-To: <20250918-max77705_77976_charger_improvement-v4-0-11ec9188f489@gmail.com> To: Chanwoo Choi , Krzysztof Kozlowski , Lee Jones , Sebastian Reichel , Luca Ceresoli Cc: Krzysztof Kozlowski , Sebastian Reichel , linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Dzmitry Sankouski X-Mailer: b4 0.14.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1758215207; l=2911; i=dsankouski@gmail.com; s=20240619; h=from:subject:message-id; bh=rM2VMTtuLx1OO1I64a08oL67vd4wqDtZKMaT66QU+PI=; b=pB9WMpdk3DeUxhkHdOrXbuBcKcWjrHr/CcSt/zb6DWEH/wn3J1q4vYzXDuMEP93pitkPR2Qrv ytEDfuoqn2pAB4PC8v0IBR4iL63Z7thpOMWpeer6kpK1QR3q1WZ0hh6 X-Developer-Key: i=dsankouski@gmail.com; a=ed25519; pk=YJcXFcN1EWrzBYuiE2yi5Mn6WLn6L1H71J+f7X8fMag= Add INPUT_CURRENT_LIMIT, CONSTANT_CHARGE_CURRENT properties as writeable to be able to control input power consumption and charging speed. Signed-off-by: Dzmitry Sankouski --- Changes in v4: - use 'chg' var name for driver private data, like in the rest of the driver --- drivers/power/supply/max77705_charger.c | 54 +++++++++++++++++++++++++++++= ++++ 1 file changed, 54 insertions(+) diff --git a/drivers/power/supply/max77705_charger.c b/drivers/power/supply= /max77705_charger.c index 23c643a307bd..3062411dcb45 100644 --- a/drivers/power/supply/max77705_charger.c +++ b/drivers/power/supply/max77705_charger.c @@ -105,6 +105,17 @@ static int max77705_get_online(struct regmap *regmap, = int *val) return 0; } =20 +static int max77705_set_integer(struct max77705_charger_data *chg, enum ma= x77705_field_idx fidx, + unsigned int clamp_min, unsigned int clamp_max, + unsigned int div, int val) +{ + unsigned int regval; + + regval =3D clamp_val(val, clamp_min, clamp_max) / div; + + return regmap_field_write(chg->rfield[fidx], regval); +} + static int max77705_check_battery(struct max77705_charger_data *chg, int *= val) { unsigned int reg_data; @@ -384,12 +395,55 @@ static int max77705_chg_get_property(struct power_sup= ply *psy, return 0; } =20 +static int max77705_set_property(struct power_supply *psy, + enum power_supply_property psp, + const union power_supply_propval *val) +{ + struct max77705_charger_data *chg =3D power_supply_get_drvdata(psy); + int err =3D 0; + + switch (psp) { + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: + err =3D max77705_set_integer(chg, MAX77705_CHG_CC_LIM, + MAX77705_CURRENT_CHGIN_MIN, + MAX77705_CURRENT_CHGIN_MAX, + MAX77705_CURRENT_CHG_STEP, + val->intval); + break; + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: + err =3D max77705_set_integer(chg, MAX77705_CHG_CHGIN_LIM, + MAX77705_CURRENT_CHGIN_MIN, + MAX77705_CURRENT_CHGIN_MAX, + MAX77705_CURRENT_CHGIN_STEP, + val->intval); + break; + default: + err =3D -EINVAL; + } + + return err; +}; + +static int max77705_property_is_writeable(struct power_supply *psy, + enum power_supply_property psp) +{ + switch (psp) { + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: + return true; + default: + return false; + } +} + static const struct power_supply_desc max77705_charger_psy_desc =3D { .name =3D "max77705-charger", .type =3D POWER_SUPPLY_TYPE_USB, .properties =3D max77705_charger_props, + .property_is_writeable =3D max77705_property_is_writeable, .num_properties =3D ARRAY_SIZE(max77705_charger_props), .get_property =3D max77705_chg_get_property, + .set_property =3D max77705_set_property, }; =20 static void max77705_chgin_isr_work(struct work_struct *work) --=20 2.39.5