On Thu, 2023-01-26 at 05:53 -0800, Guenter Roeck wrote:
> On Thu, Jan 26, 2023 at 03:02:22PM +1100, Frank Crawford wrote:
> > Add IT87952E, a new chip ID (DEV ID 0x8695), which appears to be an
> > updated version of the IT8792E and takes the same configuration.
> >
> > The model name comes from the model name printed on the chip.
> >
> > There is no datasheet publicly available.
> >
> > Signed-off-by: Frank Crawford <frank@xxxxxxxxxxxxxxxxxx>
> > ---
> > drivers/hwmon/it87.c | 17 ++++++++++++++++-
> > 1 file changed, 16 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
> > index e8eeedd23bee..85ecc61dbf9e 100644
> > --- a/drivers/hwmon/it87.c
> > +++ b/drivers/hwmon/it87.c
> > @@ -34,6 +34,7 @@
> > * IT8786E Super I/O chip w/LPC interface
> > * IT8790E Super I/O chip w/LPC interface
> > * IT8792E Super I/O chip w/LPC interface
> > + * IT87952E Super I/O chip w/LPC interface
> > * Sis950 A clone of the IT8705F
> > *
> > * Copyright (C) 2001 Chris Gauthron
> > @@ -63,7 +64,7 @@
> >
> > enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728,
> > it8732,
> > it8771, it8772, it8781, it8782, it8783, it8786,
> > it8790,
> > - it8792, it8603, it8620, it8622, it8628 };
> > + it8792, it8603, it8620, it8622, it8628, it87952 };
> >
> > static struct platform_device *it87_pdev[2];
> >
> > @@ -160,6 +161,7 @@ static inline void superio_exit(int ioreg, bool
> > doexit)
> > #define IT8622E_DEVID 0x8622
> > #define IT8623E_DEVID 0x8623
> > #define IT8628E_DEVID 0x8628
> > +#define IT87952E_DEVID 0x8695
> > #define IT87_ACT_REG 0x30
> > #define IT87_BASE_REG 0x60
> >
> > @@ -470,6 +472,15 @@ static const struct it87_devices
> > it87_devices[] = {
> > | FEAT_SIX_TEMP | FEAT_VIN3_5V,
> > .peci_mask = 0x07,
> > },
> > + [it87952] = {
> > + .name = "it87952",
> > + .model = "IT87952E",
> > + .features = FEAT_NEWER_AUTOPWM | FEAT_16BIT_FANS
> > + | FEAT_TEMP_OFFSET | FEAT_TEMP_OLD_PECI |
> > FEAT_TEMP_PECI
> > + | FEAT_10_9MV_ADC | FEAT_IN7_INTERNAL,
> > + .peci_mask = 0x07,
> > + .old_peci_mask = 0x02, /* Actually reports PCH */
> > + },
> > };
> >
> > #define has_16bit_fans(data) ((data)->features &
> > FEAT_16BIT_FANS)
> > @@ -2501,6 +2512,10 @@ static int __init it87_find(int sioaddr,
> > unsigned short *address,
> > case IT8628E_DEVID:
> > sio_data->type = it8628;
> > break;
> > + case IT87952E_DEVID:
> > + sio_data->type = it87952;
> > + doexit = false; /* See IT8792E comment above */
> > + break;
>
> Is that true for this chip as well ? I would have hoped they fix
> the problem for an updated version of the same chip.
Unfortunately my testing has been through others for this chip, and the
effects have been similar to the IT8792E, i.e. sometimes found
sometimes not. I can't be sure if the testers did something wrong, but
I felt it was better to assume that part of the firmware is unchanged
and still contains the same bug.
>
> Thanks,
> Guenter
Regards
Frank
>
> > case 0xffff: /* No device at all */
> > goto exit;
> > default:
> > --
> > 2.39.1
> >
