| Message ID | 20211114170335.66994-15-hdegoede@redhat.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | power-suppy/i2c/extcon: Fix charger setup on Xiaomi Mi Pad 2 and Lenovo Yogabook | expand |
On Sun, Nov 14, 2021 at 7:04 PM Hans de Goede <hdegoede@redhat.com> wrote: > > Tablet / laptop designs using an Intel Cherry Trail x86 main SoC with > an Intel Whiskey Cove PMIC do not use a single standard setup for does not > the charger, fuel-gauge and other chips surrounding the PMIC / > charging+data USB port. > > Unlike what is normal on X86 this diversity in designs is not handled > by the ACPI tables. On 2 of the 3 known designs there are no standard > (PNP0C0A) ACPI battery devices and on the 3th design the ACPI battery > device does not work under Linux due to it requiring non-standard > and undocumented ACPI behavior. > > So to make things work under Linux we use native charger and fuel-gauge > drivers on these devices, re-using the native drivers used on ARM boards > with the same charger / fuel-gauge ICs. > > This requires various MFD-cell drivers for the CHT-WC PMIC cells to > know which model they are exactly running on so that they can e.g. > instantiate an I2C-client for the right model charger-IC (the charger > is connected to an I2C-controller which is part of the PMIC). > > Rather then duplicating DMI-id matching to check which model we are > running on in each MFD-cell driver add a helper function for this > and make this id all 3 known models: > > 1. The GPD Win and GPD Pocket mini-laptops, these are really 2 models > but the Pocket re-uses the GPD Win's design in a different housing: > > The WC PMIC is connected to a TI BQ24292i charger, paired with > a Maxim MAX17047 fuelgauge + a FUSB302 USB Type-C Controller + > a PI3USB30532 USB switch, for a fully functional Type-C port. > > 2. The Xiaomi Mi Pad 2: > > The WC PMIC is connected to a TI BQ25890 charger, paired with > a TI BQ27520 fuelgauge, using the TI BQ25890 for BC1.2 charger type > detection, for a USB-2 only Type-C port without PD. > > 3. The Lenovo Yoga Book YB1-X90 / Lenovo Yoga Book YB1-X91 series: > > The WC PMIC is connected to a TI BQ25892 charger, paired with > a TI BQ27542 fuelgauge, using the WC PMIC for BC1.2 charger type > detection and using the BQ25892's Mediatek Pump Express+ (1.0) > support to enable charging with up to 12V through a micro-USB port. ... > + /* > + * Note this may not seem like a very unique match, but in the > + * 24000+ DMI decode dumps from linux-hardware.org only 42 have Can you add https:// (or is it gopher? :) > + * a board_vendor value of "AMI Corporation" and of those 42 > + * only 1 (the GPD win/pocket entry) has a board_name of > + * "Default string". Also very few devices have both board_ and > + * product_name not set. > + */ ... > +enum intel_cht_wc_models intel_cht_wc_get_model(void) > +{ > + const struct dmi_system_id *id; > + > + id = dmi_first_match(cht_wc_model_dmi_ids); > + if (!id) > + return INTEL_CHT_WC_UNKNOWN; > + > + return (long)id->driver_data; Why not proper casting, i.e. (enum intel_...)? > +} > +EXPORT_SYMBOL_GPL(intel_cht_wc_get_model); Are you planning to use EXPORT_SYMBOL_GPL_NS()? If not, please consider it.
Hi, On 11/16/21 12:18, Andy Shevchenko wrote: > On Sun, Nov 14, 2021 at 7:04 PM Hans de Goede <hdegoede@redhat.com> wrote: >> >> Tablet / laptop designs using an Intel Cherry Trail x86 main SoC with >> an Intel Whiskey Cove PMIC do not use a single standard setup for > > does not > >> the charger, fuel-gauge and other chips surrounding the PMIC / >> charging+data USB port. >> >> Unlike what is normal on X86 this diversity in designs is not handled >> by the ACPI tables. On 2 of the 3 known designs there are no standard >> (PNP0C0A) ACPI battery devices and on the 3th design the ACPI battery >> device does not work under Linux due to it requiring non-standard >> and undocumented ACPI behavior. >> >> So to make things work under Linux we use native charger and fuel-gauge >> drivers on these devices, re-using the native drivers used on ARM boards >> with the same charger / fuel-gauge ICs. >> >> This requires various MFD-cell drivers for the CHT-WC PMIC cells to >> know which model they are exactly running on so that they can e.g. >> instantiate an I2C-client for the right model charger-IC (the charger >> is connected to an I2C-controller which is part of the PMIC). >> >> Rather then duplicating DMI-id matching to check which model we are >> running on in each MFD-cell driver add a helper function for this >> and make this id all 3 known models: >> >> 1. The GPD Win and GPD Pocket mini-laptops, these are really 2 models >> but the Pocket re-uses the GPD Win's design in a different housing: >> >> The WC PMIC is connected to a TI BQ24292i charger, paired with >> a Maxim MAX17047 fuelgauge + a FUSB302 USB Type-C Controller + >> a PI3USB30532 USB switch, for a fully functional Type-C port. >> >> 2. The Xiaomi Mi Pad 2: >> >> The WC PMIC is connected to a TI BQ25890 charger, paired with >> a TI BQ27520 fuelgauge, using the TI BQ25890 for BC1.2 charger type >> detection, for a USB-2 only Type-C port without PD. >> >> 3. The Lenovo Yoga Book YB1-X90 / Lenovo Yoga Book YB1-X91 series: >> >> The WC PMIC is connected to a TI BQ25892 charger, paired with >> a TI BQ27542 fuelgauge, using the WC PMIC for BC1.2 charger type >> detection and using the BQ25892's Mediatek Pump Express+ (1.0) >> support to enable charging with up to 12V through a micro-USB port. > > ... > >> + /* >> + * Note this may not seem like a very unique match, but in the >> + * 24000+ DMI decode dumps from linux-hardware.org only 42 have > > Can you add https:// (or is it gopher? :) linux-hardware.org is intended here as an identifier of the projects, not an URL. The DMI decode database lives here: https://github.com/linuxhw/DMI.git But I don't believe that adding the exact URL in the comment is important, esp. since that may change over time. > >> + * a board_vendor value of "AMI Corporation" and of those 42 >> + * only 1 (the GPD win/pocket entry) has a board_name of >> + * "Default string". Also very few devices have both board_ and >> + * product_name not set. >> + */ > > ... > >> +enum intel_cht_wc_models intel_cht_wc_get_model(void) >> +{ >> + const struct dmi_system_id *id; >> + >> + id = dmi_first_match(cht_wc_model_dmi_ids); >> + if (!id) >> + return INTEL_CHT_WC_UNKNOWN; >> + >> + return (long)id->driver_data; > > Why not proper casting, i.e. (enum intel_...)? Because sizeof(enum) != sizeof(void *) so then the compiler will complain. Where as sizeof(long) == sizeof(void *) > >> +} >> +EXPORT_SYMBOL_GPL(intel_cht_wc_get_model); > > Are you planning to use EXPORT_SYMBOL_GPL_NS()? If not, please consider it. No I was not planning on this and it seems overkill for just a single exported symbol. Regards, Hans
Hi, On 11/16/21 12:18, Andy Shevchenko wrote: > On Sun, Nov 14, 2021 at 7:04 PM Hans de Goede <hdegoede@redhat.com> wrote: >> >> Tablet / laptop designs using an Intel Cherry Trail x86 main SoC with >> an Intel Whiskey Cove PMIC do not use a single standard setup for > > does not designs ... do not. Design_s_ so more then one, so "do not" is correct. <snip> >> +} >> +EXPORT_SYMBOL_GPL(intel_cht_wc_get_model); > > Are you planning to use EXPORT_SYMBOL_GPL_NS()? If not, please consider it. This will be gone in v3, since this info is now stored in struct intel_soc_pmic as requested by Chanwoo. Regards, Hans
diff --git a/drivers/mfd/intel_soc_pmic_chtwc.c b/drivers/mfd/intel_soc_pmic_chtwc.c index 49c5f71664bc..3432bd18f5d0 100644 --- a/drivers/mfd/intel_soc_pmic_chtwc.c +++ b/drivers/mfd/intel_soc_pmic_chtwc.c @@ -10,6 +10,7 @@ #include <linux/acpi.h> #include <linux/delay.h> +#include <linux/dmi.h> #include <linux/err.h> #include <linux/i2c.h> #include <linux/interrupt.h> @@ -134,6 +135,51 @@ static const struct regmap_irq_chip cht_wc_regmap_irq_chip = { .num_regs = 1, }; +static const struct dmi_system_id cht_wc_model_dmi_ids[] = { + { /* GPD win / GPD pocket mini laptops */ + .driver_data = (void *)(long)INTEL_CHT_WC_GPD_WIN_POCKET, + /* + * Note this may not seem like a very unique match, but in the + * 24000+ DMI decode dumps from linux-hardware.org only 42 have + * a board_vendor value of "AMI Corporation" and of those 42 + * only 1 (the GPD win/pocket entry) has a board_name of + * "Default string". Also very few devices have both board_ and + * product_name not set. + */ + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), + DMI_MATCH(DMI_BOARD_NAME, "Default string"), + DMI_MATCH(DMI_BOARD_SERIAL, "Default string"), + DMI_MATCH(DMI_PRODUCT_NAME, "Default string"), + }, + }, { /* Xiaomi Mi Pad 2 */ + .driver_data = (void *)(long)INTEL_CHT_WC_XIAOMI_MIPAD2, + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"), + DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"), + }, + }, { /* Lenovo Yoga Book X90F / X91F / X91L */ + .driver_data = (void *)(long)INTEL_CHT_WC_LENOVO_YOGABOOK1, + .matches = { + /* Non exact match to match all versions */ + DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9"), + }, + }, + { } /* Terminating empty */ +}; + +enum intel_cht_wc_models intel_cht_wc_get_model(void) +{ + const struct dmi_system_id *id; + + id = dmi_first_match(cht_wc_model_dmi_ids); + if (!id) + return INTEL_CHT_WC_UNKNOWN; + + return (long)id->driver_data; +} +EXPORT_SYMBOL_GPL(intel_cht_wc_get_model); + static int cht_wc_probe(struct i2c_client *client) { struct device *dev = &client->dev; diff --git a/include/linux/mfd/intel_soc_pmic.h b/include/linux/mfd/intel_soc_pmic.h index 6a88e34cb955..dd17d7f82434 100644 --- a/include/linux/mfd/intel_soc_pmic.h +++ b/include/linux/mfd/intel_soc_pmic.h @@ -41,7 +41,16 @@ struct intel_soc_pmic { struct intel_scu_ipc_dev *scu; }; +enum intel_cht_wc_models { + INTEL_CHT_WC_UNKNOWN, + INTEL_CHT_WC_GPD_WIN_POCKET, + INTEL_CHT_WC_XIAOMI_MIPAD2, + INTEL_CHT_WC_LENOVO_YOGABOOK1, +}; + int intel_soc_pmic_exec_mipi_pmic_seq_element(u16 i2c_address, u32 reg_address, u32 value, u32 mask); +enum intel_cht_wc_models intel_cht_wc_get_model(void); + #endif /* __INTEL_SOC_PMIC_H__ */
Tablet / laptop designs using an Intel Cherry Trail x86 main SoC with an Intel Whiskey Cove PMIC do not use a single standard setup for the charger, fuel-gauge and other chips surrounding the PMIC / charging+data USB port. Unlike what is normal on X86 this diversity in designs is not handled by the ACPI tables. On 2 of the 3 known designs there are no standard (PNP0C0A) ACPI battery devices and on the 3th design the ACPI battery device does not work under Linux due to it requiring non-standard and undocumented ACPI behavior. So to make things work under Linux we use native charger and fuel-gauge drivers on these devices, re-using the native drivers used on ARM boards with the same charger / fuel-gauge ICs. This requires various MFD-cell drivers for the CHT-WC PMIC cells to know which model they are exactly running on so that they can e.g. instantiate an I2C-client for the right model charger-IC (the charger is connected to an I2C-controller which is part of the PMIC). Rather then duplicating DMI-id matching to check which model we are running on in each MFD-cell driver add a helper function for this and make this id all 3 known models: 1. The GPD Win and GPD Pocket mini-laptops, these are really 2 models but the Pocket re-uses the GPD Win's design in a different housing: The WC PMIC is connected to a TI BQ24292i charger, paired with a Maxim MAX17047 fuelgauge + a FUSB302 USB Type-C Controller + a PI3USB30532 USB switch, for a fully functional Type-C port. 2. The Xiaomi Mi Pad 2: The WC PMIC is connected to a TI BQ25890 charger, paired with a TI BQ27520 fuelgauge, using the TI BQ25890 for BC1.2 charger type detection, for a USB-2 only Type-C port without PD. 3. The Lenovo Yoga Book YB1-X90 / Lenovo Yoga Book YB1-X91 series: The WC PMIC is connected to a TI BQ25892 charger, paired with a TI BQ27542 fuelgauge, using the WC PMIC for BC1.2 charger type detection and using the BQ25892's Mediatek Pump Express+ (1.0) support to enable charging with up to 12V through a micro-USB port. Signed-off-by: Hans de Goede <hdegoede@redhat.com> --- drivers/mfd/intel_soc_pmic_chtwc.c | 46 ++++++++++++++++++++++++++++++ include/linux/mfd/intel_soc_pmic.h | 9 ++++++ 2 files changed, 55 insertions(+)