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Message-ID: <20201027201304.GA142632@kozik-lap>
Date: Tue, 27 Oct 2020 21:13:04 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Gene Chen <gene.chen.richtek@...il.com>
Cc: sre@...nel.org, Matthias Brugger <matthias.bgg@...il.com>,
Rob Herring <robh+dt@...nel.org>, linux-pm@...r.kernel.org,
devicetree <devicetree@...r.kernel.org>,
linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
"moderated list:ARM/Mediatek SoC support"
<linux-mediatek@...ts.infradead.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Gene Chen <gene_chen@...htek.com>, cy_huang@...htek.com,
shufan_lee@...htek.com
Subject: Re: [PATCH 2/2] power: supply: mt6360_charger: add MT6360 charger
support
On Mon, Oct 26, 2020 at 02:45:12PM +0800, Gene Chen wrote:
> Krzysztof Kozlowski <krzk@...nel.org> 於 2020年10月16日 週五 下午11:52寫道：
> >
> No, I will remove it.
>
> > > + irq = platform_get_irq_byname(pdev, irq_desc->name);
> >
> > Interrupts were not described in the bindings.
> >
>
> I add resource when MFD driver add sub-device. Should I add something
> in dt-binding?
I think I missed the part that you are taking here interrupts from
parent MFD device. Bindings are fine then.
>
> ret = devm_mfd_add_devices(&client->dev, PLATFORM_DEVID_AUTO,
> mt6360_devs,
> ARRAY_SIZE(mt6360_devs), NULL, 0,
> regmap_irq_get_domain(ddata->irq_data));
>
> static const struct resource mt6360_chg_resources[] = {
> DEFINE_RES_IRQ_NAMED(MT6360_CHG_TREG_EVT, "chg_treg_evt"),
> DEFINE_RES_IRQ_NAMED(MT6360_PWR_RDY_EVT, "pwr_rdy_evt"),
> DEFINE_RES_IRQ_NAMED(MT6360_CHG_BATSYSUV_EVT,
> "chg_batsysuv_evt"),
> DEFINE_RES_IRQ_NAMED(MT6360_CHG_VSYSUV_EVT, "chg_vsysuv_evt"),
> DEFINE_RES_IRQ_NAMED(MT6360_CHG_VSYSOV_EVT, "chg_vsysov_evt"),
> DEFINE_RES_IRQ_NAMED(MT6360_CHG_VBATOV_EVT, "chg_vbatov_evt"),
> DEFINE_RES_IRQ_NAMED(MT6360_CHG_VBUSOV_EVT, "chg_vbusov_evt"),
> DEFINE_RES_IRQ_NAMED(MT6360_CHG_AICCMEASL, "chg_aiccmeasl"),
> DEFINE_RES_IRQ_NAMED(MT6360_WDTMRI, "wdtmri"),
> DEFINE_RES_IRQ_NAMED(MT6360_CHG_RECHGI, "chg_rechgi"),
> DEFINE_RES_IRQ_NAMED(MT6360_CHG_TERMI, "chg_termi"),
> DEFINE_RES_IRQ_NAMED(MT6360_CHG_IEOCI, "chg_ieoci"),
> DEFINE_RES_IRQ_NAMED(MT6360_PUMPX_DONEI, "pumpx_donei"),
> DEFINE_RES_IRQ_NAMED(MT6360_ATTACH_I, "attach_i"),
> DEFINE_RES_IRQ_NAMED(MT6360_CHRDET_EXT_EVT, "chrdet_ext_evt"),
>
> > > + if (irq < 0)
> > > + continue;
> > > + ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
> > > + irq_desc->irq_handler,
> > > + IRQF_TRIGGER_FALLING,
> > > + irq_desc->name,
> > > + platform_get_drvdata(pdev));
> >
> > Why you use handler thread per each interrupt? This should be rather one
> > handler. Especially that most of your handlers do nothing.
> >
>
> I will remove serveral irqs which is do nothing, and only keep
> chrdet_ext for power ready and attachi for bc12 done.
> I add serveral resources in MFD device.
> Do you mean I use IRQF_SHARED to reduce irq?
I meant to use on thread_fn for most of them. I think, if you were using
regmap_irq_chip and virtual IRQ here (see regmap_irq_get_virq), you
could entirely skip the non-important interrupts. Just ignore them.
Should be less code.
>
> > > + if (ret < 0) {
> > > + dev_err(&pdev->dev,
> > > + "request %s irq fail\n", irq_desc->name);
> > > + return ret;
> > > + }
> > > + }
> > > + return 0;
> > > +}
> > > +
> > > +struct mt6360_field_info {
> > > + struct device_attribute dev_attr;
> > > + u8 reg;
> > > + u8 mask;
> > > + u8 shft;
> > > +};
> > > +
> > > +static ssize_t mt6360_sysfs_show(struct device *dev,
> > > + struct device_attribute *attr, char *buf);
> > > +static ssize_t mt6360_sysfs_store(struct device *dev,
> > > + struct device_attribute *attr, const char *buf, size_t count);
> > > +
> > > +#define MT6360_FIELD_RW(_name, _reg, _nbit) \
> > > +{ \
> > > + .dev_attr = __ATTR(_name, 0664, \
> > > + mt6360_sysfs_show, mt6360_sysfs_store), \
> > > + .reg = MT6360_PMU_##_reg, \
> > > + .mask = MT6360_MASK_##_nbit, \
> > > + .shft = MT6360_SHFT_##_nbit, \
> > > +}
> > > +
> > > +#define MT6360_FIELD_RO(_name, _reg, _nbit) \
> > > +{ \
> > > + .dev_attr = __ATTR(_name, 0444, \
> > > + mt6360_sysfs_show, NULL), \
> > > + .reg = MT6360_PMU_##_reg, \
> > > + .mask = MT6360_MASK_##_nbit, \
> > > + .shft = MT6360_SHFT_##_nbit, \
> > > +}
> > > +
> > > +static struct mt6360_field_info mt6360_field_tbl[] = {
> > > + MT6360_FIELD_RW(hiz, CHG_CTRL1, HIZ),
> > > + MT6360_FIELD_RW(vmivr, CHG_CTRL6, VMIVR),
> > > + MT6360_FIELD_RW(iaicr, CHG_CTRL3, IAICR),
> > > + MT6360_FIELD_RW(SYSREG, CHG_CTRL11, SYSREG),
> > > + MT6360_FIELD_RW(otg_oc, CHG_CTRL10, OTG_OC),
> > > + MT6360_FIELD_RW(ichg, CHG_CTRL17, ICHG),
> > > + MT6360_FIELD_RW(iprec, CHG_CTRL8, IPREC),
> > > + MT6360_FIELD_RW(ieoc, CHG_CTRL9, IEOC),
> > > + MT6360_FIELD_RW(voreg, CHG_CTRL4, VOREG),
> > > + MT6360_FIELD_RW(lbp, CHG_CTRL10, LBP),
> > > + MT6360_FIELD_RW(vrec, CHG_CTRL11, VREC),
> > > + MT6360_FIELD_RW(te, CHG_CTRL2, TE),
> > > + MT6360_FIELD_RW(chg_wdt_en, CHG_CTRL13, CHG_WDT_EN),
> > > + MT6360_FIELD_RW(chg_wdt, CHG_CTRL13, CHG_WDT),
> > > + MT6360_FIELD_RW(wt_fc, CHG_CTRL12, WT_FC),
> > > + MT6360_FIELD_RW(bat_comp, CHG_CTRL18, BAT_COMP),
> > > + MT6360_FIELD_RW(vclamp, CHG_CTRL18, VCLAMP),
> > > + MT6360_FIELD_RW(usbchgen, DEVICE_TYPE, USBCHGEN),
> > > + MT6360_FIELD_RW(chg_en, CHG_CTRL2, CHG_EN),
> > > + MT6360_FIELD_RO(chrdet_ext, FOD_STAT, CHRDET_EXT),
> > > +};
> > > +
> > > +static struct attribute *mt6360_attrs[ARRAY_SIZE(mt6360_field_tbl) + 1];
> > > +
> > > +static const struct attribute_group mt6360_attr_group = {
> > > + .attrs = mt6360_attrs,
> > > +};
> > > +
> > > +static ssize_t mt6360_sysfs_show(struct device *dev,
> > > + struct device_attribute *attr, char *buf)
> > > +{
> > > + struct mt6360_chg_info *mci = dev_get_drvdata(dev->parent);
> > > + struct mt6360_field_info *info = (void *)attr;
> > > + unsigned int regval;
> > > + int ret;
> > > +
> > > + ret = regmap_read(mci->regmap, info->reg, ®val);
> > > + if (ret < 0)
> > > + return ret;
> > > + regval = (regval & info->mask) >> info->shft;
> > > + return scnprintf(buf, PAGE_SIZE, "%02x\n", regval);
> > > +}
> > > +
> > > +static ssize_t mt6360_sysfs_store(struct device *dev,
> > > + struct device_attribute *attr, const char *buf, size_t count)
> > > +{
> > > + struct mt6360_chg_info *mci = dev_get_drvdata(dev->parent);
> > > + struct mt6360_field_info *info = (void *)attr;
> > > + int ret, tmp;
> > > +
> > > + if (kstrtoint(buf, 10, &tmp) < 0) {
> > > + dev_err(dev, "failed to parsing number\n");
> > > + return -EINVAL;
> > > + }
> > > + ret = regmap_update_bits(mci->regmap,
> > > + info->reg, info->mask, tmp << info->shft);
> > > + if (ret < 0)
> > > + return ret;
> > > + return count;
> > > +}
> > > +
> > > +static int mt6360_sysfs_create_group(struct mt6360_chg_info *mci)
> > > +{
> > > + int i, tb_size = ARRAY_SIZE(mt6360_field_tbl);
> > > +
> > > + for (i = 0; i < tb_size; i++)
> > > + mt6360_attrs[i] = &(mt6360_field_tbl[i].dev_attr.attr);
> > > + return devm_device_add_group(&mci->psy->dev, &mt6360_attr_group);
> > > +}
> > > +
> > > +static int mt6360_chg_init_setting(struct mt6360_chg_info *mci)
> > > +{
> > > + int ret;
> > > +
> > > + /* Disable bc12 */
> > > + ret = regmap_update_bits(mci->regmap, MT6360_PMU_DEVICE_TYPE,
> > > + MT6360_MASK_USBCHGEN, 0);
> > > + if (ret < 0) {
> > > + dev_err(mci->dev, "%s: disable bc12 fail\n", __func__);
> > > + goto out;
> > > + }
> > > + /* Set input current limit select by AICR */
> > > + ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL2,
> > > + MT6360_MASK_IINLMTSEL,
> > > + MT6360_IINLMTSEL_AICR <<
> > > + MT6360_SHFT_IINLMTSEL);
> > > + if (ret < 0) {
> > > + dev_err(mci->dev,
> > > + "%s: switch iinlmtsel to aicr fail\n", __func__);
> > > + goto out;
> > > + }
> > > + usleep_range(5000, 6000);
> > > + /* Disable ilim */
> > > + ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL3,
> > > + MT6360_MASK_ILIM_EN, 0);
> > > + if (ret < 0) {
> > > + dev_err(mci->dev,
> > > + "%s: switch iinlmtsel to aicr fail\n", __func__);
> > > + goto out;
> > > + }
> > > + /* Enlarge OTG_OC to max 3A */
> > > + ret = regmap_update_bits(mci->regmap,
> > > + MT6360_PMU_CHG_CTRL10, 0x07, 0x07);
> > > + if (ret < 0) {
> > > + dev_err(mci->dev,
> > > + "%s: faled config otg oc to maximum\n", __func__);
> > > + }
> > > +out:
> > > + return ret;
> > > +}
> > > +
> > > +static u32 mt6360_vinovp_trans_to_sel(u32 val)
> > > +{
> > > + u32 vinovp_tbl[] = { 5500000, 6500000, 11000000, 14500000 };
> > > + int i;
> > > +
> > > + /* Select the smaller and equal supported value */
> > > + for (i = 0; i < ARRAY_SIZE(vinovp_tbl)-1; i++) {
> > > + if (val < vinovp_tbl[i+1])
> > > + break;
> > > + }
> > > + return i;
> > > +}
> > > +
> > > +static struct mt6360_chg_platform_data *mt6360_parse_pdata(
> > > + struct platform_device *pdev)
> > > +{
> > > + struct mt6360_chg_platform_data *pdata = dev_get_platdata(&pdev->dev);
> > > + struct device_node *np = pdev->dev.of_node;
> > > + int ret;
> > > +
> > > + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
> > > + if (!pdata)
> > > + return ERR_PTR(-ENOMEM);
> > > + memcpy(pdata, &def_platform_data, sizeof(*pdata));
> >
> > Use kmemdup or something similar.
> >
>
> ACK
>
> > > + ret = of_property_read_u32(np, "vinovp", &pdata->vinovp);
> > > + if (ret) {
> > > + dev_err(&pdev->dev, "failed to parse vinovp in DT\n");
> > > + return ERR_PTR(ret);
> > > + }
> > > + return pdata;
> > > +}
> > > +
> > > +static int mt6360_apply_pdata(struct platform_device *pdev)
> > > +{
> > > + struct mt6360_chg_platform_data *pdata = dev_get_platdata(&pdev->dev);
> > > + struct mt6360_chg_info *mci = dev_get_drvdata(&pdev->dev);
> > > + int ret;
> > > + u32 sel;
> > > +
> > > + sel = mt6360_vinovp_trans_to_sel(pdata->vinovp);
> > > + ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL19,
> > > + MT6360_MASK_VINOVP, sel << MT6360_SHFT_VINOVP);
> > > + if (ret)
> > > + return ret;
> > > + return 0;
> > > +}
> > > +
> > > +static int mt6360_charger_probe(struct platform_device *pdev)
> > > +{
> > > + struct mt6360_chg_platform_data *pdata = dev_get_platdata(&pdev->dev);
> > > + struct mt6360_chg_info *mci;
> > > + struct power_supply_config charger_cfg = {};
> > > + struct regulator_config config = { };
> > > + int ret;
> > > +
> > > + mci = devm_kzalloc(&pdev->dev, sizeof(*mci), GFP_KERNEL);
> > > + if (!mci)
> > > + return -ENOMEM;
> > > +
> > > + pdata = mt6360_parse_pdata(pdev);
> > > + if (IS_ERR_OR_NULL(pdata))
> > > + return PTR_ERR(pdata);
> > > +
> > > + pdev->dev.platform_data = pdata;
> > > +
> > > + mci->dev = &pdev->dev;
> > > + mutex_init(&mci->chgdet_lock);
> > > + platform_set_drvdata(pdev, mci);
> > > + INIT_WORK(&mci->chrdet_work, &mt6360_chrdet_work);
> > > +
> > > + mci->regmap = dev_get_regmap(pdev->dev.parent, NULL);
> > > + if (!mci->regmap) {
> > > + dev_err(&pdev->dev, "Failed to get parent regmap\n");
> > > + return -ENODEV;
> > > + }
> > > +
> > > + ret = mt6360_apply_pdata(pdev);
> > > + if (ret) {
> > > + dev_err(&pdev->dev, "Failed to apply pdata\n");
> > > + return ret;
> > > + }
> > > +
> > > + mci->edev = devm_extcon_dev_allocate(&pdev->dev, mt6360_extcon_cable);
> > > + if (IS_ERR(mci->edev)) {
> > > + dev_err(&pdev->dev, "Failed to allocate memory for extcon\n");
> > > + return -ENOMEM;
> > > + }
> > > +
> > > + ret = devm_extcon_dev_register(&pdev->dev, mci->edev);
> > > + if (ret) {
> > > + dev_err(&pdev->dev, "Failed to register extcon dev\n");
> > > + return ret;
> > > + }
> > > +
> > > + memcpy(&mci->psy_desc, &mt6360_charger_desc, sizeof(mci->psy_desc));
> > > + mci->psy_desc.name = dev_name(&pdev->dev);
> > > + charger_cfg.drv_data = mci;
> > > + charger_cfg.of_node = pdev->dev.of_node;
> > > + charger_cfg.supplied_to = mt6360_charger_supplied_to;
> > > + charger_cfg.num_supplicants = ARRAY_SIZE(mt6360_charger_supplied_to);
> > > + mci->psy = devm_power_supply_register(&pdev->dev,
> > > + &mci->psy_desc, &charger_cfg);
> > > + if (IS_ERR(mci->psy)) {
> > > + dev_err(&pdev->dev, "Failed to register power supply dev\n");
> > > + return PTR_ERR(mci->psy);
> > > + }
> > > +
> > > + ret = mt6360_chg_init_setting(mci);
> > > + if (ret) {
> > > + dev_err(&pdev->dev, "Failed to initial setting\n");
> > > + return ret;
> > > + }
> > > +
> > > + schedule_work(&mci->chrdet_work);
> > > +
> > > + ret = mt6360_chg_irq_register(pdev);
> > > + if (ret) {
> > > + dev_err(&pdev->dev, "Failed to register irqs\n");
> > > + return ret;
> > > + }
> > > +
> > > + config.dev = &pdev->dev;
> > > + config.regmap = mci->regmap;
> > > + mci->otg_rdev = devm_regulator_register(&pdev->dev, &mt6360_otg_rdesc,
> > > + &config);
> > > + if (IS_ERR(mci->otg_rdev))
> > > + return PTR_ERR(mci->otg_rdev);
> > > +
> > > + ret = mt6360_sysfs_create_group(mci);
> > > + if (ret) {
> > > + dev_err(&pdev->dev,
> > > + "%s: create sysfs attrs fail\n", __func__);
> > > + return ret;
> > > + }
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static const struct of_device_id __maybe_unused mt6360_charger_of_id[] = {
> > > + { .compatible = "mediatek,mt6360-chg", },
> > > + {},
> > > +};
> > > +MODULE_DEVICE_TABLE(of, mt6360_charger_of_id);
> > > +
> > > +static const struct platform_device_id mt6360_charger_id[] = {
> > > + { "mt6360-chg", 0 },
> > > + {},
> > > +};
> > > +MODULE_DEVICE_TABLE(platform, mt6360_charger_id);
> > > +
> > > +static struct platform_driver mt6360_charger_driver = {
> > > + .driver = {
> > > + .name = "mt6360-chg",
> > > + .owner = THIS_MODULE,
> >
> > Not needed. You did not run coccinelle, right?
> >
> > > + .of_match_table = of_match_ptr(mt6360_charger_of_id),
> > > + },
> > > + .probe = mt6360_charger_probe,
> > > + .id_table = mt6360_charger_id,
> > > +};
> > > +module_platform_driver(mt6360_charger_driver);
> > > +
> > > +MODULE_AUTHOR("CY_Huang <cy_huang@...htek.com>");
> > > +MODULE_DESCRIPTION("MT6360 Charger Driver");
> > > +MODULE_LICENSE("GPL");
> > > +MODULE_VERSION("1.0.0");
> >
> > Skip version.
> >
> >
>
> ACK
>
> > All these comments were after looking briefly - I did not perform a
> > thorough review. I am surprised that you combined regulator and charger
> > driver in one. It is doable but makes driver bigger and more difficult
> > to maintain. Consider splitting them.
> >
>
> MT6360 charger is switching charger, Can I keep regulator for boost
> OTG like bq24190?
It's ok.
Best regards,
Krzysztof
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