| Message ID | 20220715112607.591-9-peterwu.pub@gmail.com (mailing list archive) |
|---|---|
| State | Handled Elsewhere, archived |
| Headers | show |
| Series | Add MediaTek MT6370 PMIC support | expand |
Il 15/07/22 13:26, ChiaEn Wu ha scritto: > From: ChiYuan Huang <cy_huang@richtek.com> > > The MT6370 is a highly-integrated smart power management IC, which > includes a single cell Li-Ion/Li-Polymer switching battery charger, > a USB Type-C & Power Delivery (PD) controller, dual Flash LED current > sources, a RGB LED driver, a backlight WLED driver, a display bias > driver and a general LDO for portable devices. > > This commit add support for the Type-C & Power Delivery controller in > MediaTek MT6370 IC. > > Signed-off-by: ChiYuan Huang <cy_huang@richtek.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
On Fri, Jul 15, 2022 at 1:28 PM ChiaEn Wu <peterwu.pub@gmail.com> wrote: > The MT6370 is a highly-integrated smart power management IC, which > includes a single cell Li-Ion/Li-Polymer switching battery charger, > a USB Type-C & Power Delivery (PD) controller, dual Flash LED current > sources, a RGB LED driver, a backlight WLED driver, a display bias > driver and a general LDO for portable devices. > > This commit add support for the Type-C & Power Delivery controller in This commit add -> Add > MediaTek MT6370 IC. > +static int mt6370_tcpc_probe(struct platform_device *pdev) > +{ > + struct mt6370_priv *priv; > + struct device *dev = &pdev->dev; > + int ret; > + > + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); > + if (!priv) > + return -ENOMEM; > + > + priv->dev = dev; > + platform_set_drvdata(pdev, priv); > + > + priv->tcpci_data.regmap = dev_get_regmap(dev->parent, NULL); > + if (!priv->tcpci_data.regmap) > + return dev_err_probe(dev, -ENODEV, "Failed to init regmap\n"); > + > + ret = mt6370_check_vendor_info(priv); > + if (ret) > + return ret; > + > + priv->irq = platform_get_irq(pdev, 0); > + if (priv->irq < 0) > + return priv->irq; > + > + /* Assign TCPCI feature and ops */ > + priv->tcpci_data.auto_discharge_disconnect = 1; > + priv->tcpci_data.init = mt6370_tcpc_init; > + priv->tcpci_data.set_vconn = mt6370_tcpc_set_vconn; > + > + priv->vbus = devm_regulator_get_optional(dev, "vbus"); > + if (!IS_ERR(priv->vbus)) > + priv->tcpci_data.set_vbus = mt6370_tcpc_set_vbus; > + > + priv->tcpci = tcpci_register_port(dev, &priv->tcpci_data); > + if (IS_ERR(priv->tcpci)) > + return dev_err_probe(dev, PTR_ERR(priv->tcpci), > + "Failed to register tcpci port\n"); > + > + ret = devm_request_threaded_irq(dev, priv->irq, NULL, > + mt6370_irq_handler, IRQF_ONESHOT, > + dev_name(dev), priv); > + if (ret) { > + tcpci_unregister_port(priv->tcpci); This is wrong. You mixed devm_ with non-devm. Either drop devm_ *after* the first non-devm_ call, or convert everything to be managed. > + return dev_err_probe(dev, ret, "Failed to allocate irq\n"); > + } > + > + device_init_wakeup(dev, true); > + dev_pm_set_wake_irq(dev, priv->irq); > + > + return 0; > +} > + > +static int mt6370_tcpc_remove(struct platform_device *pdev) > +{ > + struct mt6370_priv *priv = platform_get_drvdata(pdev); > + disable_irq(priv->irq); Why? An ugly workaround due to ordering issues in ->probe()? > + tcpci_unregister_port(priv->tcpci); > + dev_pm_clear_wake_irq(&pdev->dev); > + device_init_wakeup(&pdev->dev, false); > + > + return 0; > +}
On Fri, Jul 15, 2022 at 03:10:42PM +0200, Andy Shevchenko wrote: > On Fri, Jul 15, 2022 at 1:28 PM ChiaEn Wu <peterwu.pub@gmail.com> wrote: > > > The MT6370 is a highly-integrated smart power management IC, which > > includes a single cell Li-Ion/Li-Polymer switching battery charger, > > a USB Type-C & Power Delivery (PD) controller, dual Flash LED current > > sources, a RGB LED driver, a backlight WLED driver, a display bias > > driver and a general LDO for portable devices. > > > > This commit add support for the Type-C & Power Delivery controller in > > This commit add -> Add > Upper case? Or rewrite it as 'This commit is to add .....'? > > > MediaTek MT6370 IC. > > > > +static int mt6370_tcpc_probe(struct platform_device *pdev) > > +{ > > + struct mt6370_priv *priv; > > + struct device *dev = &pdev->dev; > > + int ret; > > + > > + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); > > + if (!priv) > > + return -ENOMEM; > > + > > + priv->dev = dev; > > + platform_set_drvdata(pdev, priv); > > + > > + priv->tcpci_data.regmap = dev_get_regmap(dev->parent, NULL); > > + if (!priv->tcpci_data.regmap) > > + return dev_err_probe(dev, -ENODEV, "Failed to init regmap\n"); > > + > > + ret = mt6370_check_vendor_info(priv); > > + if (ret) > > + return ret; > > + > > + priv->irq = platform_get_irq(pdev, 0); > > + if (priv->irq < 0) > > + return priv->irq; > > + > > + /* Assign TCPCI feature and ops */ > > + priv->tcpci_data.auto_discharge_disconnect = 1; > > + priv->tcpci_data.init = mt6370_tcpc_init; > > + priv->tcpci_data.set_vconn = mt6370_tcpc_set_vconn; > > + > > + priv->vbus = devm_regulator_get_optional(dev, "vbus"); > > + if (!IS_ERR(priv->vbus)) > > + priv->tcpci_data.set_vbus = mt6370_tcpc_set_vbus; > > + > > + priv->tcpci = tcpci_register_port(dev, &priv->tcpci_data); > > + if (IS_ERR(priv->tcpci)) > > + return dev_err_probe(dev, PTR_ERR(priv->tcpci), > > + "Failed to register tcpci port\n"); > > + > > + ret = devm_request_threaded_irq(dev, priv->irq, NULL, > > + mt6370_irq_handler, IRQF_ONESHOT, > > + dev_name(dev), priv); > > + if (ret) { > > > + tcpci_unregister_port(priv->tcpci); > > This is wrong. > You mixed devm_ with non-devm. Either drop devm_ *after* the first > non-devm_ call, or convert everything to be managed. > How about to add 'devm_add_action_or_reset' for tcpci_unregister_port? This will convert all as 'devm_' version. > > + return dev_err_probe(dev, ret, "Failed to allocate irq\n"); > > + } > > + > > + device_init_wakeup(dev, true); > > + dev_pm_set_wake_irq(dev, priv->irq); > > + > > + return 0; > > +} > > + > > +static int mt6370_tcpc_remove(struct platform_device *pdev) > > +{ > > + struct mt6370_priv *priv = platform_get_drvdata(pdev); > > > + disable_irq(priv->irq); > > Why? > An ugly workaround due to ordering issues in ->probe()? > Yes, due to the ordering in probe. 'bus remove' will be called before device resource releases. Like as you said, another way is to convert all as non-devm version after 'tcpci_unregister_port'. If to keep the original order, 'disable_irq' before 'tcpci_unregister_port' can make the flow more safe. Or you can think one case if irq triggers after 'tcpci_unregister_port'. Null pointer occurs. Anyway, in next revision, I'll convert all to be 'devm_' version. For this remove callback, only 'dev_pm_clear_wake_irq' and 'device_init_wakeup' will be kept. Is this better? > > + tcpci_unregister_port(priv->tcpci); > > + dev_pm_clear_wake_irq(&pdev->dev); > > + device_init_wakeup(&pdev->dev, false); > > + > > + return 0; > > +} > > -- > With Best Regards, > Andy Shevchenko
On Mon, Jul 18, 2022 at 10:08 AM ChiYuan Huang <u0084500@gmail.com> wrote: > On Fri, Jul 15, 2022 at 03:10:42PM +0200, Andy Shevchenko wrote: > > On Fri, Jul 15, 2022 at 1:28 PM ChiaEn Wu <peterwu.pub@gmail.com> wrote: ... > > > This commit add support for the Type-C & Power Delivery controller in > > > > This commit add -> Add > > > Upper case? Or rewrite it as 'This commit is to add .....'? Please, read this documentation [1] for better understanding. It should clarify this and perhaps other possible questions. [1]: https://www.kernel.org/doc/html/latest/process/submitting-patches.html#describe-your-changes > > > MediaTek MT6370 IC. ... > > > + ret = devm_request_threaded_irq(dev, priv->irq, NULL, > > > + mt6370_irq_handler, IRQF_ONESHOT, > > > + dev_name(dev), priv); > > > + if (ret) { > > > > > + tcpci_unregister_port(priv->tcpci); > > > > This is wrong. > > You mixed devm_ with non-devm. Either drop devm_ *after* the first > > non-devm_ call, or convert everything to be managed. > > > How about to add 'devm_add_action_or_reset' for tcpci_unregister_port? > This will convert all as 'devm_' version. I think it would work, that wrapper was designed to cover cases like this. > > > + return dev_err_probe(dev, ret, "Failed to allocate irq\n"); > > > + } ... > > > +static int mt6370_tcpc_remove(struct platform_device *pdev) > > > +{ > > > + struct mt6370_priv *priv = platform_get_drvdata(pdev); > > > > > + disable_irq(priv->irq); > > > > Why? > > An ugly workaround due to ordering issues in ->probe()? > > > Yes, due to the ordering in probe. > 'bus remove' will be called before device resource releases. > > Like as you said, another way is to convert all as non-devm > version after 'tcpci_unregister_port'. > > If to keep the original order, 'disable_irq' before > 'tcpci_unregister_port' can make the flow more safe. > > Or you can think one case if irq triggers after > 'tcpci_unregister_port'. Null pointer occurs. > > Anyway, in next revision, I'll convert all to be 'devm_' version. > For this remove callback, only 'dev_pm_clear_wake_irq' and > 'device_init_wakeup' will be kept. > > Is this better? Sounds like a plan! > > > + tcpci_unregister_port(priv->tcpci); > > > + dev_pm_clear_wake_irq(&pdev->dev); > > > + device_init_wakeup(&pdev->dev, false); > > > + > > > + return 0; > > > +}
Andy Shevchenko <andy.shevchenko@gmail.com> 於 2022年7月18日 週一 晚上7:39寫道： > > On Mon, Jul 18, 2022 at 10:08 AM ChiYuan Huang <u0084500@gmail.com> wrote: > > On Fri, Jul 15, 2022 at 03:10:42PM +0200, Andy Shevchenko wrote: > > > On Fri, Jul 15, 2022 at 1:28 PM ChiaEn Wu <peterwu.pub@gmail.com> wrote: > > ... > > > > > This commit add support for the Type-C & Power Delivery controller in > > > > > > This commit add -> Add > > > > > Upper case? Or rewrite it as 'This commit is to add .....'? > > Please, read this documentation [1] for better understanding. It > should clarify this and perhaps other possible questions. > > [1]: https://www.kernel.org/doc/html/latest/process/submitting-patches.html#describe-your-changes > I'm thinking why to change it from 'add' to "Add'. Ah, I misunderstand it. > > > > MediaTek MT6370 IC. > > ... > > > > > + ret = devm_request_threaded_irq(dev, priv->irq, NULL, > > > > + mt6370_irq_handler, IRQF_ONESHOT, > > > > + dev_name(dev), priv); > > > > + if (ret) { > > > > > > > + tcpci_unregister_port(priv->tcpci); > > > > > > This is wrong. > > > You mixed devm_ with non-devm. Either drop devm_ *after* the first > > > non-devm_ call, or convert everything to be managed. > > > > > How about to add 'devm_add_action_or_reset' for tcpci_unregister_port? > > This will convert all as 'devm_' version. > > I think it would work, that wrapper was designed to cover cases like this. > > > > > + return dev_err_probe(dev, ret, "Failed to allocate irq\n"); > > > > + } > > ... > > > > > +static int mt6370_tcpc_remove(struct platform_device *pdev) > > > > +{ > > > > + struct mt6370_priv *priv = platform_get_drvdata(pdev); > > > > > > > + disable_irq(priv->irq); > > > > > > Why? > > > An ugly workaround due to ordering issues in ->probe()? > > > > > Yes, due to the ordering in probe. > > 'bus remove' will be called before device resource releases. > > > > Like as you said, another way is to convert all as non-devm > > version after 'tcpci_unregister_port'. > > > > If to keep the original order, 'disable_irq' before > > 'tcpci_unregister_port' can make the flow more safe. > > > > Or you can think one case if irq triggers after > > 'tcpci_unregister_port'. Null pointer occurs. > > > > Anyway, in next revision, I'll convert all to be 'devm_' version. > > For this remove callback, only 'dev_pm_clear_wake_irq' and > > 'device_init_wakeup' will be kept. > > > > Is this better? > > Sounds like a plan! > Already did. Just to double confirm the changes. Thanks. All are clear. > > > > + tcpci_unregister_port(priv->tcpci); > > > > + dev_pm_clear_wake_irq(&pdev->dev); > > > > + device_init_wakeup(&pdev->dev, false); > > > > + > > > > + return 0; > > > > +} > > -- > With Best Regards, > Andy Shevchenko
diff --git a/drivers/usb/typec/tcpm/Kconfig b/drivers/usb/typec/tcpm/Kconfig index 073fd2e..e6b88ca 100644 --- a/drivers/usb/typec/tcpm/Kconfig +++ b/drivers/usb/typec/tcpm/Kconfig @@ -35,6 +35,17 @@ config TYPEC_MT6360 USB Type-C. It works with Type-C Port Controller Manager to provide USB PD and USB Type-C functionalities. +config TYPEC_TCPCI_MT6370 + tristate "MediaTek MT6370 Type-C driver" + depends on MFD_MT6370 + help + MediaTek MT6370 is a multi-functional IC that includes + USB Type-C. It works with Type-C Port Controller Manager + to provide USB PD and USB Type-C functionalities. + + This driver can also be built as a module. The module + will be called "tcpci_mt6370". + config TYPEC_TCPCI_MAXIM tristate "Maxim TCPCI based Type-C chip driver" help diff --git a/drivers/usb/typec/tcpm/Makefile b/drivers/usb/typec/tcpm/Makefile index 7d499f3..906d9dc 100644 --- a/drivers/usb/typec/tcpm/Makefile +++ b/drivers/usb/typec/tcpm/Makefile @@ -6,4 +6,5 @@ typec_wcove-y := wcove.o obj-$(CONFIG_TYPEC_TCPCI) += tcpci.o obj-$(CONFIG_TYPEC_RT1711H) += tcpci_rt1711h.o obj-$(CONFIG_TYPEC_MT6360) += tcpci_mt6360.o +obj-$(CONFIG_TYPEC_TCPCI_MT6370) += tcpci_mt6370.o obj-$(CONFIG_TYPEC_TCPCI_MAXIM) += tcpci_maxim.o diff --git a/drivers/usb/typec/tcpm/tcpci_mt6370.c b/drivers/usb/typec/tcpm/tcpci_mt6370.c new file mode 100644 index 0000000..a08b0ba --- /dev/null +++ b/drivers/usb/typec/tcpm/tcpci_mt6370.c @@ -0,0 +1,207 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2022 Richtek Technology Corp. + * + * Author: ChiYuan Huang <cy_huang@richtek.com> + */ + +#include <linux/bits.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/mod_devicetable.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/pm_wakeup.h> +#include <linux/pm_wakeirq.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> +#include <linux/usb/tcpm.h> +#include "tcpci.h" + +#define MT6370_REG_SYSCTRL8 0x9B + +#define MT6370_AUTOIDLE_MASK BIT(3) + +#define MT6370_VENDOR_ID 0x29CF +#define MT6370_TCPC_DID_A 0x2170 + +struct mt6370_priv { + struct device *dev; + struct regulator *vbus; + struct tcpci *tcpci; + struct tcpci_data tcpci_data; + int irq; +}; + +static const struct reg_sequence mt6370_reg_init[] = { + REG_SEQ(0xA0, 0x1, 1000), + REG_SEQ(0x81, 0x38, 0), + REG_SEQ(0x82, 0x82, 0), + REG_SEQ(0xBA, 0xFC, 0), + REG_SEQ(0xBB, 0x50, 0), + REG_SEQ(0x9E, 0x8F, 0), + REG_SEQ(0xA1, 0x5, 0), + REG_SEQ(0xA2, 0x4, 0), + REG_SEQ(0xA3, 0x4A, 0), + REG_SEQ(0xA4, 0x01, 0), + REG_SEQ(0x95, 0x01, 0), + REG_SEQ(0x80, 0x71, 0), + REG_SEQ(0x9B, 0x3A, 1000), +}; + +static int mt6370_tcpc_init(struct tcpci *tcpci, struct tcpci_data *data) +{ + u16 did; + int ret; + + ret = regmap_register_patch(data->regmap, mt6370_reg_init, + ARRAY_SIZE(mt6370_reg_init)); + if (ret) + return ret; + + ret = regmap_raw_read(data->regmap, TCPC_BCD_DEV, &did, sizeof(u16)); + if (ret) + return ret; + + if (did == MT6370_TCPC_DID_A) + return regmap_write(data->regmap, TCPC_FAULT_CTRL, 0x80); + + return 0; +} + +static int mt6370_tcpc_set_vconn(struct tcpci *tcpci, struct tcpci_data *data, + bool enable) +{ + return regmap_update_bits(data->regmap, MT6370_REG_SYSCTRL8, + MT6370_AUTOIDLE_MASK, + !enable ? MT6370_AUTOIDLE_MASK : 0); +} + +static int mt6370_tcpc_set_vbus(struct tcpci *tcpci, struct tcpci_data *data, + bool source, bool sink) +{ + struct mt6370_priv *priv = container_of(data, struct mt6370_priv, + tcpci_data); + int ret; + + ret = regulator_is_enabled(priv->vbus); + if (ret < 0) + return ret; + + if (ret && !source) + return regulator_disable(priv->vbus); + + if (!ret && source) + return regulator_enable(priv->vbus); + + return 0; +} + +static irqreturn_t mt6370_irq_handler(int irq, void *dev_id) +{ + struct mt6370_priv *priv = dev_id; + + return tcpci_irq(priv->tcpci); +} + +static int mt6370_check_vendor_info(struct mt6370_priv *priv) +{ + struct regmap *regmap = priv->tcpci_data.regmap; + u16 vid; + int ret; + + ret = regmap_raw_read(regmap, TCPC_VENDOR_ID, &vid, sizeof(u16)); + if (ret) + return ret; + + if (vid != MT6370_VENDOR_ID) + return dev_err_probe(priv->dev, -ENODEV, + "Vendor ID not correct 0x%02x\n", vid); + + return 0; +} + +static int mt6370_tcpc_probe(struct platform_device *pdev) +{ + struct mt6370_priv *priv; + struct device *dev = &pdev->dev; + int ret; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->dev = dev; + platform_set_drvdata(pdev, priv); + + priv->tcpci_data.regmap = dev_get_regmap(dev->parent, NULL); + if (!priv->tcpci_data.regmap) + return dev_err_probe(dev, -ENODEV, "Failed to init regmap\n"); + + ret = mt6370_check_vendor_info(priv); + if (ret) + return ret; + + priv->irq = platform_get_irq(pdev, 0); + if (priv->irq < 0) + return priv->irq; + + /* Assign TCPCI feature and ops */ + priv->tcpci_data.auto_discharge_disconnect = 1; + priv->tcpci_data.init = mt6370_tcpc_init; + priv->tcpci_data.set_vconn = mt6370_tcpc_set_vconn; + + priv->vbus = devm_regulator_get_optional(dev, "vbus"); + if (!IS_ERR(priv->vbus)) + priv->tcpci_data.set_vbus = mt6370_tcpc_set_vbus; + + priv->tcpci = tcpci_register_port(dev, &priv->tcpci_data); + if (IS_ERR(priv->tcpci)) + return dev_err_probe(dev, PTR_ERR(priv->tcpci), + "Failed to register tcpci port\n"); + + ret = devm_request_threaded_irq(dev, priv->irq, NULL, + mt6370_irq_handler, IRQF_ONESHOT, + dev_name(dev), priv); + if (ret) { + tcpci_unregister_port(priv->tcpci); + return dev_err_probe(dev, ret, "Failed to allocate irq\n"); + } + + device_init_wakeup(dev, true); + dev_pm_set_wake_irq(dev, priv->irq); + + return 0; +} + +static int mt6370_tcpc_remove(struct platform_device *pdev) +{ + struct mt6370_priv *priv = platform_get_drvdata(pdev); + + disable_irq(priv->irq); + tcpci_unregister_port(priv->tcpci); + dev_pm_clear_wake_irq(&pdev->dev); + device_init_wakeup(&pdev->dev, false); + + return 0; +} + +static const struct of_device_id mt6370_tcpc_devid_table[] = { + { .compatible = "mediatek,mt6370-tcpc" }, + {} +}; +MODULE_DEVICE_TABLE(of, mt6370_tcpc_devid_table); + +static struct platform_driver mt6370_tcpc_driver = { + .driver = { + .name = "mt6370-tcpc", + .of_match_table = mt6370_tcpc_devid_table, + }, + .probe = mt6370_tcpc_probe, + .remove = mt6370_tcpc_remove, +}; +module_platform_driver(mt6370_tcpc_driver); + +MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>"); +MODULE_DESCRIPTION("MT6370 USB Type-C Port Controller Interface Driver"); +MODULE_LICENSE("GPL v2");