Re: [PATCH v4 3/3] platform/x86: intel_cht_int33fe: Update fusb302 type string, add properties

[Hans de Goede <hdegoede@redhat.com>]

Hi,

On 04-09-17 08:27, Andy Shevchenko wrote:
> On Sun, Sep 3, 2017 at 3:41 PM, Hans de Goede <hdegoede@redhat.com> wrote:
>> The fusb302 driver as merged in staging uses "typec_fusb302" as i2c-id
>> rather then just "fusb302" and needs us to set a number of device-
>> properties, adjust the intel_cht_int33fe driver accordingly.
>>
>> One of the properties set is max-snk-mv which makes the fusb302 driver
>> negotiate up to 12V charging voltage, which is a bad idea on boards
>> which are not setup to handle this, so this commit also adds 2 extra
>> sanity checks to make sure that the expected Whiskey Cove PMIC +
>> TI bq24292i charger combo, which can handle 12V, is present.
> 
> Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> 
> (in case Wolfram would like to take it)
> 
> See comments below.
> 
>>
>> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
>> ---
>> Changes in v2:
>> -Set board_info.dev_name
>> -Adjust for changes in other patches in this patch-set
>> ---
>>   drivers/platform/x86/Kconfig             |  6 ++++-
>>   drivers/platform/x86/intel_cht_int33fe.c | 44 +++++++++++++++++++++++++++++++-
>>   2 files changed, 48 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
>> index 80b87954f6dd..c5554577681a 100644
>> --- a/drivers/platform/x86/Kconfig
>> +++ b/drivers/platform/x86/Kconfig
>> @@ -793,7 +793,7 @@ config ACPI_CMPC
>>
>>   config INTEL_CHT_INT33FE
>>          tristate "Intel Cherry Trail ACPI INT33FE Driver"
>> -       depends on X86 && ACPI && I2C
>> +       depends on X86 && ACPI && I2C && REGULATOR
>>          ---help---
>>            This driver add support for the INT33FE ACPI device found on
>>            some Intel Cherry Trail devices.
>> @@ -804,6 +804,10 @@ config INTEL_CHT_INT33FE
>>            This driver instantiates i2c-clients for these, so that standard
>>            i2c drivers for these chips can bind to the them.
>>
>> +         If you enable this driver it is advised to also select
>> +         CONFIG_CHARGER_BQ24190=m, CONFIG_BATTERY_MAX17042=m and
>> +         CONFIG_TYPEC_FUSB302=m (currently in drivers/staging).
>> +
> 
> I would put FUSB302 first since it's not obvious now that remark in
> parens is related only to it. And might be better rephase the path in
> terms of `make menuconfig` rather than pathname in the source tree.

Ok, fixed for v5, which I will send right away.

Regards,

Hans



>>   config INTEL_INT0002_VGPIO
>>          tristate "Intel ACPI INT0002 Virtual GPIO driver"
>>          depends on GPIOLIB && ACPI
>> diff --git a/drivers/platform/x86/intel_cht_int33fe.c b/drivers/platform/x86/intel_cht_int33fe.c
>> index a9cbc4b8ca63..b2925d996613 100644
>> --- a/drivers/platform/x86/intel_cht_int33fe.c
>> +++ b/drivers/platform/x86/intel_cht_int33fe.c
>> @@ -24,6 +24,7 @@
>>   #include <linux/i2c.h>
>>   #include <linux/interrupt.h>
>>   #include <linux/module.h>
>> +#include <linux/regulator/consumer.h>
>>   #include <linux/slab.h>
>>
>>   #define EXPECTED_PTYPE         4
>> @@ -77,12 +78,21 @@ static const struct property_entry max17047_props[] = {
>>          { }
>>   };
>>
>> +static const struct property_entry fusb302_props[] = {
>> +       PROPERTY_ENTRY_STRING("fcs,extcon-name", "cht_wcove_pwrsrc"),
>> +       PROPERTY_ENTRY_U32("fcs,max-sink-microvolt", 12000000),
>> +       PROPERTY_ENTRY_U32("fcs,max-sink-microamp",   3000000),
>> +       PROPERTY_ENTRY_U32("fcs,max-sink-microwatt", 36000000),
>> +       { }
>> +};
>> +
>>   static int cht_int33fe_probe(struct i2c_client *client)
>>   {
>>          struct device *dev = &client->dev;
>>          struct i2c_board_info board_info;
>>          struct cht_int33fe_data *data;
>>          struct i2c_client *max17047;
>> +       struct regulator *regulator;
>>          unsigned long long ptyp;
>>          acpi_status status;
>>          int ret, fusb302_irq;
>> @@ -100,6 +110,34 @@ static int cht_int33fe_probe(struct i2c_client *client)
>>          if (ptyp != EXPECTED_PTYPE)
>>                  return -ENODEV;
>>
>> +       /* Check presence of INT34D3 (hardware-rev 3) expected for ptype == 4 */
>> +       if (!acpi_dev_present("INT34D3", "1", 3)) {
>> +               dev_err(dev, "Error PTYPE == %d, but no INT34D3 device\n",
>> +                       EXPECTED_PTYPE);
>> +               return -ENODEV;
>> +       }
>> +
>> +       /*
>> +        * We expect the WC PMIC to be paired with a TI bq24292i charger-IC.
>> +        * We check for the bq24292i vbus regulator here, this has 2 purposes:
>> +        * 1) The bq24292i allows charging with up to 12V, setting the fusb302's
>> +        *    max-snk voltage to 12V with another charger-IC is not good.
>> +        * 2) For the fusb302 driver to get the bq24292i vbus regulator, the
>> +        *    regulator-map, which is part of the bq24292i regulator_init_data,
>> +        *    must be registered before the fusb302 is instantiated, otherwise
>> +        *    it will end up with a dummy-regulator.
>> +        * Note "cht_wc_usb_typec_vbus" comes from the regulator_init_data
>> +        * which is defined in i2c-cht-wc.c from where the bq24292i i2c-client
>> +        * gets instantiated. We use regulator_get_optional here so that we
>> +        * don't end up getting a dummy-regulator ourselves.
>> +        */
>> +       regulator = regulator_get_optional(dev, "cht_wc_usb_typec_vbus");
>> +       if (IS_ERR(regulator)) {
>> +               ret = PTR_ERR(regulator);
>> +               return (ret == -ENODEV) ? -EPROBE_DEFER : ret;
>> +       }
>> +       regulator_put(regulator);
>> +
>>          /* The FUSB302 uses the irq at index 1 and is the only irq user */
>>          fusb302_irq = acpi_dev_gpio_irq_get(ACPI_COMPANION(dev), 1);
>>          if (fusb302_irq < 0) {
>> @@ -126,6 +164,7 @@ static int cht_int33fe_probe(struct i2c_client *client)
>>          } else {
>>                  memset(&board_info, 0, sizeof(board_info));
>>                  strlcpy(board_info.type, "max17047", I2C_NAME_SIZE);
>> +               board_info.dev_name = "max17047";
>>                  board_info.properties = max17047_props;
>>                  data->max17047 = i2c_acpi_new_device(dev, 1, &board_info);
>>                  if (!data->max17047)
>> @@ -133,7 +172,9 @@ static int cht_int33fe_probe(struct i2c_client *client)
>>          }
>>
>>          memset(&board_info, 0, sizeof(board_info));
>> -       strlcpy(board_info.type, "fusb302", I2C_NAME_SIZE);
>> +       strlcpy(board_info.type, "typec_fusb302", I2C_NAME_SIZE);
>> +       board_info.dev_name = "fusb302";
>> +       board_info.properties = fusb302_props;
>>          board_info.irq = fusb302_irq;
>>
>>          data->fusb302 = i2c_acpi_new_device(dev, 2, &board_info);
>> @@ -141,6 +182,7 @@ static int cht_int33fe_probe(struct i2c_client *client)
>>                  goto out_unregister_max17047;
>>
>>          memset(&board_info, 0, sizeof(board_info));
>> +       board_info.dev_name = "pi3usb30532";
>>          strlcpy(board_info.type, "pi3usb30532", I2C_NAME_SIZE);
>>
>>          data->pi3usb30532 = i2c_acpi_new_device(dev, 3, &board_info);
>> --
>> 2.13.4
>>
> 
> 
>