Hi Herve,
thanks for your patch!
On Tue, Sep 12, 2023 at 12:15 PM Herve Codina <herve.codina@xxxxxxxxxxx> wrote:
> The Lantiq PEF2256 is a framer and line interface component designed to
> fulfill all required interfacing between an analog E1/T1/J1 line and the
> digital PCM system highway/H.100 bus.
>
> This kind of component can be found in old telecommunication system.
> It was used to digital transmission of many simultaneous telephone calls
> by time-division multiplexing. Also using HDLC protocol, WAN networks
> can be reached through the framer.
>
> This pinmux support handles the pin muxing part (pins RP(A..D) and pins
> XP(A..D)) of the PEF2256.
>
> Signed-off-by: Herve Codina <herve.codina@xxxxxxxxxxx>
> Reviewed-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
> Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Nice to see this as a proper pin control driver!
> drivers/pinctrl/pinctrl-pef2256-regs.h | 65 ++++++
> drivers/pinctrl/pinctrl-pef2256.c | 308 +++++++++++++++++++++++++
Do you really need a separate header just for some registers?
But it's a matter of taste so I'm not gonna complain if you want
it this way.
> +config PINCTRL_PEF2256
> + tristate "Lantiq PEF2256 (FALC56) pin controller driver"
> + depends on OF && FRAMER_PEF2256
> + select PINMUX
select PINCONF
> + select GENERIC_PINCONF
This brings it in implicitly but I prefer that you just select it.
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
I think SPDX mandates that you start the tag with C99 comments
// SPDX-License-Identifier: GPL-2.0-only
> + /* We map 1 group <-> 1 pin */
Also known as "the qualcomm trick", but hey: it's fine.
> +static int pef2256_register_pinctrl(struct pef2256_pinctrl *pef2256)
> +{
> + struct pinctrl_dev *pctrl;
> +
> + pef2256->pctrl_desc.name = dev_name(pef2256->dev);
> + pef2256->pctrl_desc.owner = THIS_MODULE;
> + pef2256->pctrl_desc.pctlops = &pef2256_pctlops;
> + pef2256->pctrl_desc.pmxops = &pef2256_pmxops;
> + if (pef2256->version == PEF2256_VERSION_1_2) {
> + pef2256->pctrl_desc.pins = pef2256_v12_pins;
> + pef2256->pctrl_desc.npins = ARRAY_SIZE(pef2256_v12_pins);
> + pef2256->functions = pef2256_v12_functions;
> + pef2256->nfunctions = ARRAY_SIZE(pef2256_v12_functions);
> + } else {
> + pef2256->pctrl_desc.pins = pef2256_v2x_pins;
> + pef2256->pctrl_desc.npins = ARRAY_SIZE(pef2256_v2x_pins);
> + pef2256->functions = pef2256_v2x_functions;
> + pef2256->nfunctions = ARRAY_SIZE(pef2256_v2x_functions);
> + }
> +
> + pctrl = devm_pinctrl_register(pef2256->dev, &pef2256->pctrl_desc, pef2256);
> + if (IS_ERR(pctrl)) {
> + dev_err(pef2256->dev, "pinctrl driver registration failed\n");
> + return PTR_ERR(pctrl);
> + }
> +
> + return 0;
You could use
return dev_err_probe(...);
> + pef2256_reset_pinmux(pef2256_pinctrl);
> + ret = pef2256_register_pinctrl(pef2256_pinctrl);
> + if (ret)
> + return ret;
Or you could use it down here.
With or without these changes (because they are nitpicks)
Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Yours,
Linus Walleij
