netdev - Re: [PATCH v2 11/11] can: tcan4x5x: Specify separate read/write ranges

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Date:   Mon, 12 Dec 2022 11:54:44 +0100
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     Markus Schneider-Pargmann <msp@...libre.com>
Cc:     Chandrasekar Ramakrishnan <rcsekar@...sung.com>,
        Wolfgang Grandegger <wg@...ndegger.com>,
        linux-can@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 11/11] can: tcan4x5x: Specify separate read/write
 ranges

On 06.12.2022 17:20:01, Marc Kleine-Budde wrote:
> On 06.12.2022 12:57:28, Markus Schneider-Pargmann wrote:
> > Specify exactly which registers are read/writeable in the chip. This
> > is supposed to help detect any violations in the future.
> > 
> > Signed-off-by: Markus Schneider-Pargmann <msp@...libre.com>
> > ---
> >  drivers/net/can/m_can/tcan4x5x-regmap.c | 43 +++++++++++++++++++++----
> >  1 file changed, 37 insertions(+), 6 deletions(-)
> > 
> > diff --git a/drivers/net/can/m_can/tcan4x5x-regmap.c b/drivers/net/can/m_can/tcan4x5x-regmap.c
> > index 33aed989e42a..2b218ce04e9f 100644
> > --- a/drivers/net/can/m_can/tcan4x5x-regmap.c
> > +++ b/drivers/net/can/m_can/tcan4x5x-regmap.c
> > @@ -90,16 +90,47 @@ static int tcan4x5x_regmap_read(void *context,
> >  	return 0;
> >  }
> >  
> > -static const struct regmap_range tcan4x5x_reg_table_yes_range[] = {
> > +static const struct regmap_range tcan4x5x_reg_table_wr_range[] = {
> > +	/* Device ID and SPI Registers */
> > +	regmap_reg_range(0x000c, 0x0010),
> 
> According to "Table 8-8" 0xc is RO, but in "8.6.1.4 Status (address =
> h000C) [reset = h0000000U]" it clearly says it has write 1 to clear bits
> :/.
> 
> > +	/* Device configuration registers and Interrupt Flags*/
> > +	regmap_reg_range(0x0800, 0x080c),
> > +	regmap_reg_range(0x0814, 0x0814),
> 
> 0x814 is marked as reserved in "SLLSEZ5D – JANUARY 2018 – REVISED JUNE
> 2022"?

I'll take the series as is, that can be fixed later.

regards,
Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde           |
Embedded Linux                   | https://www.pengutronix.de  |
Vertretung West/Dortmund         | Phone: +49-231-2826-924     |
Amtsgericht Hildesheim, HRA 2686 | Fax:   +49-5121-206917-5555 |

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