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Thu, 25 Aug 2022 05:54:07 -0700 (PDT) Message-ID: <66b99ce4-752a-17e7-3213-26a898abd4a8@gmail.com> Date: Thu, 25 Aug 2022 15:54:06 +0300 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.12.0 Content-Language: en-US To: Chris Morgan , linux-rockchip@lists.infradead.org Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, zhangqing@rock-chips.com, zyw@rock-chips.com, jon.lin@rock-chips.com, maccraft123mc@gmail.com, sre@kernel.org, heiko@sntech.de, krzysztof.kozlowski+dt@linaro.org, robh+dt@kernel.org, lee@kernel.org, Chris Morgan References: <20220823193015.10229-1-macroalpha82@gmail.com> <20220823193015.10229-4-macroalpha82@gmail.com> From: Matti Vaittinen Subject: Re: [PATCH V9 3/4] power: supply: Add charger driver for Rockchip RK817 In-Reply-To: <20220823193015.10229-4-macroalpha82@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220825_055413_881591_6D6F2507 X-CRM114-Status: GOOD ( 23.02 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org On 8/23/22 22:30, Chris Morgan wrote: > From: Chris Morgan > > Add support for the Rockchip rk817 battery charger integrated into the > rk817 PMIC. > > Signed-off-by: Chris Morgan > Signed-off-by: Maya Matuszczyk > --- > drivers/power/supply/Kconfig | 6 + > drivers/power/supply/Makefile | 1 + > drivers/power/supply/rk817_charger.c | 1157 ++++++++++++++++++++++++++ > 3 files changed, 1164 insertions(+) > create mode 100644 drivers/power/supply/rk817_charger.c > > + > +static void rk817_charging_monitor(struct work_struct *work) > +{ > + struct rk817_charger *charger; > + > + charger = container_of(work, struct rk817_charger, work.work); > + > + rk817_read_props(charger); > + > + /* Run every 8 seconds like the BSP driver did. */ > + queue_delayed_work(system_wq, &charger->work, msecs_to_jiffies(8000)); > +} I really think we would benefit from some more framework code which could handle the periodic polling tasks and the coulomb counter drift corrections when battery is full/relaxed. I think I might revive the simple-gauge patch series... > + > +static int rk817_charger_probe(struct platform_device *pdev) > +{ > + > + charger->sleep_filter_current_ua = of_value; > + > + charger->bat_ps = devm_power_supply_register(&pdev->dev, > + &rk817_bat_desc, &pscfg); > + > + charger->chg_ps = devm_power_supply_register(&pdev->dev, > + &rk817_chg_desc, &pscfg); Hmm. I think I should respin the patch which added interface for getting the battery info w/o psy-device. Now we need to take into account the situation where the psy-core accesses the driver after the registration - and prior filling the battery details from the battery node (below) :/ > + > + if (IS_ERR(charger->chg_ps)) > + return dev_err_probe(dev, -EINVAL, > + "Battery failed to probe\n"); > + > + if (IS_ERR(charger->chg_ps)) > + return dev_err_probe(dev, -EINVAL, > + "Charger failed to probe\n"); > + > + ret = power_supply_get_battery_info(charger->bat_ps, > + &bat_info); > + if (ret) { > + return dev_err_probe(dev, ret, > + "Unable to get battery info: %d\n", ret); > + } > + > + if ((!bat_info->charge_full_design_uah) || > + (!bat_info->voltage_min_design_uv) || > + (!bat_info->voltage_max_design_uv) || > + (!bat_info->constant_charge_voltage_max_uv) || > + (!bat_info->constant_charge_current_max_ua) || > + (!bat_info->charge_term_current_ua)) { > + return dev_err_probe(dev, -EINVAL, > + "Required battery info missing.\n"); > + } Just a question - should the values be compared to -EINVAL (I think the power_supply_get_battery_info() did internally initialize many of the fields to -EINVAL and not to 0?). Maybe I am wrong... > + > + charger->bat_charge_full_design_uah = bat_info->charge_full_design_uah; > + charger->bat_voltage_min_design_uv = bat_info->voltage_min_design_uv; > + charger->bat_voltage_max_design_uv = bat_info->voltage_max_design_uv; > + Generally, I did _really_ like the proper commenting/documenting of the driver. In my eyes this looked like one nice piece of a driver. When the error checking of values returned by the power_supply_get_battery_info() is checked - FWIW: Reviewed-By: Matti Vaittinen Yours -- Matti -- Matti Vaittinen Linux kernel developer at ROHM Semiconductors Oulu Finland ~~ When things go utterly wrong vim users can always type :help! ~~ _______________________________________________ Linux-rockchip mailing list Linux-rockchip@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-rockchip