[PATCH 13/14] i2c: Add support for Qualcomm I2C driver

[Sumit Garg]

On Fri, 20 Jan 2023 at 19:08, Stephan Gerhold <stephan at gerhold.net> wrote:
>
> On Fri, Jan 20, 2023 at 05:55:35PM +0530, Sumit Garg wrote:
> > On Fri, 20 Jan 2023 at 14:16, Heiko Schocher <hs at denx.de> wrote:
> > > On 20.01.23 08:17, Sumit Garg wrote:
> > > > Add support for Qualcomm I2C QUP driver which is inspired from
> > > > corresponding driver in Linux: drivers/i2c/busses/i2c-qup.c.
> > > >
> > > > Currently this driver only support FIFO polling mode which is sufficient
> > > > to support devices like eeprom, rtc etc.
> > > >
> > > > Co-developed-by: Mike Worsfold <mworsfold at impinj.com>
> > > > Signed-off-by: Mike Worsfold <mworsfold at impinj.com>
> > > > Signed-off-by: Sumit Garg <sumit.garg at linaro.org>
> > > > ---
> > > >  drivers/i2c/Kconfig   |   6 +
> > > >  drivers/i2c/Makefile  |   1 +
> > > >  drivers/i2c/qup_i2c.c | 592 ++++++++++++++++++++++++++++++++++++++++++
> > > >  3 files changed, 599 insertions(+)
> > > >  create mode 100644 drivers/i2c/qup_i2c.c
> > > >
> > > > diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig
> > > > index 76e19918aa..2a1d36f91a 100644
> > > > --- a/drivers/i2c/Kconfig
> > > > +++ b/drivers/i2c/Kconfig
> > > > @@ -635,6 +635,12 @@ config SYS_I2C_TEGRA
> > > >       help
> > > >         Support for NVIDIA I2C controller available in Tegra SoCs.
> > > >
> > > > +config SYS_I2C_QUP
> > > > +     bool "Qualcomm I2C controller"
> > > > +     depends on ARCH_SNAPDRAGON
> > > > +     help
> > > > +       Support for Qualcomm I2C controller.
> > [...]
> > > and may you can ad here some more infos
> > > like link to datasheet?
> > >
> >
> > I will try to put more info here. However, I don't think the datasheet
> > is available publically. This driver is inspired from its Linux
> > counterpart only.
> >
>
> FWIW: The I2C/SPI QUP controller is publicly documented in the
> Snapdragon 410E (APQ8016E) Technical Reference Manual [1],
> chapter "6.1 Qualcomm Universal Peripherals Engine (QUP)".
>

Thanks for the reference, I wasn't aware that APQ8016E has the same
QUP controller. I will include this reference instead.

-Sumit

> Stephan
>
> [1]: https://developer.qualcomm.com/download/sd410/snapdragon-410e-technical-reference-manual.pdf