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Message-ID: <ZLqkiqUSgohVLnbo@smile.fi.intel.com>
Date: Fri, 21 Jul 2023 18:30:18 +0300
From: Andy Shevchenko <andy@...nel.org>
To: nikita.shubin@...uefel.me
Cc: Hartley Sweeten <hsweeten@...ionengravers.com>,
Lennert Buytenhek <kernel@...tstofly.org>,
Alexander Sverdlin <alexander.sverdlin@...il.com>,
Russell King <linux@...linux.org.uk>,
Lukasz Majewski <lukma@...x.de>,
Linus Walleij <linus.walleij@...aro.org>,
Bartosz Golaszewski <brgl@...ev.pl>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
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Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Thomas Gleixner <tglx@...utronix.de>,
Alessandro Zummo <a.zummo@...ertech.it>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Wim Van Sebroeck <wim@...ux-watchdog.org>,
Guenter Roeck <linux@...ck-us.net>,
Sebastian Reichel <sre@...nel.org>,
Thierry Reding <thierry.reding@...il.com>,
Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
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Michael Peters <mpeters@...eddedts.com>,
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Subject: Re: [PATCH v3 05/42] pinctrl: add a Cirrus ep93xx SoC pin controller
On Thu, Jul 20, 2023 at 02:29:05PM +0300, Nikita Shubin via B4 Relay wrote:
> From: Nikita Shubin <nikita.shubin@...uefel.me>
>
> This adds a pin control (only multiplexing) driver for ep93xx
> SoC so we can fully convert ep93xx to device tree.
>
> This driver is capable of muxing ep9301/ep9302/ep9307/ep9312/ep9315
> variants, this is chosen based on "compatible" in device tree.
...
> +config PINCTRL_EP93XX
> + bool
> + depends on OF && (ARCH_EP93XX || COMPILE_TEST)
The OF seems to be functional dependency and not compile time one.
Thus
depends on (OF && ARCH_EP93XX) || COMPILE_TEST
> + select PINMUX
> + select GENERIC_PINCONF
> + select MFD_SYSCON
...
> +#define EP93XX_SYSCON_DEVCFG_D1ONG BIT(30) /* not used */
> +#define EP93XX_SYSCON_DEVCFG_D0ONG BIT(29) /* not used */
> +#define EP93XX_SYSCON_DEVCFG_IONU2 BIT(28) /* not used */
> +#define EP93XX_SYSCON_DEVCFG_GONK BIT(27) /* done */
> +#define EP93XX_SYSCON_DEVCFG_TONG BIT(26) /* not used */
> +#define EP93XX_SYSCON_DEVCFG_MONG BIT(25) /* not used */
> +#define EP93XX_SYSCON_DEVCFG_A2ONG BIT(22) /* not used */
> +#define EP93XX_SYSCON_DEVCFG_A1ONG BIT(21) /* not used */
> +#define EP93XX_SYSCON_DEVCFG_HONIDE BIT(11) /* done */
> +#define EP93XX_SYSCON_DEVCFG_GONIDE BIT(10) /* done */
> +#define EP93XX_SYSCON_DEVCFG_PONG BIT(9) /* done */
> +#define EP93XX_SYSCON_DEVCFG_EONIDE BIT(8) /* done */
> +#define EP93XX_SYSCON_DEVCFG_I2SONSSP BIT(7) /* done */
> +#define EP93XX_SYSCON_DEVCFG_I2SONAC97 BIT(6) /* done */
> +#define EP93XX_SYSCON_DEVCFG_RASONP3 BIT(4) /* done */
> +#define PADS_MASK (GENMASK(30, 25) | BIT(22) | BIT(21) | GENMASK(11, 6) | BIT(4))
Seems better to spell each bit as by definition given above.
...
> +/* Ordered by bit index */
> +static const char * const ep93xx_padgroups[] = {
> + NULL, NULL, NULL, NULL,
> + "RasOnP3",
> + NULL,
> + "I2SonAC97",
> + "I2SonSSP",
> + "EonIDE",
> + "PonG",
> + "GonIDE",
> + "HonIDE",
> + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
> + "A1onG",
> + "A2onG",
> + NULL, NULL,
> + "MonG",
> + "TonG",
> + "GonK",
> + "IonU2",
> + "D0onG",
> + "D1onG",
Instead of tons of NULLs, use
[NN] = "...",
which is much less error prone.
> +};
...
> +/** ep9301, ep9302*/
Is it really kernel doc (besides missing space)?
Please, run
scripts/kernel-doc -v -Wall -none $YOUR_FILE
for each file you contributed in the entire series and fix all warnings.
...
> +static const char *ep93xx_get_group_name(struct pinctrl_dev *pctldev,
> + unsigned int selector)
> +{
> + struct ep93xx_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
> +
> + switch (pmx->model) {
> + case EP93XX_9301_PINCTRL:
> + return ep9301_pin_groups[selector].grp.name;
> + case EP93XX_9307_PINCTRL:
> + return ep9307_pin_groups[selector].grp.name;
> + case EP93XX_9312_PINCTRL:
> + return ep9312_pin_groups[selector].grp.name;
> + }
> + return NULL;
Use default case instead.
> +}
...
> + /* Which bits changed */
> + before &= PADS_MASK;
> + after &= PADS_MASK;
> + expected = before & ~grp->mask;
> + expected |= grp->value;
> + expected &= PADS_MASK;
Instead of above:
expected = (before & ~grp->mask) | grp->value;
> + /* Print changed states */
> + tmp = expected ^ after;
tmp = (expected ^ after) & PADS_MASK;
> + for_each_set_bit(i, &tmp, PADS_MAXBIT) {
> + bool enabled = expected & BIT(i);
> +
> + dev_err(pmx->dev,
> + "pin group %s could not be %s: probably a hardware limitation\n",
> + ep93xx_padgroups[i], str_enabled_disabled(enabled));
Wrong indentation.
> + dev_err(pmx->dev,
> + "DeviceCfg before: %08x, after %08x, expected %08x\n",
> + before, after, expected);
Wrong indentation.
I believe this one can go to debug level.
> + }
...
> + pmx->model = (int)of_device_get_match_data(dev);
(uintptr_t) is more appropriate here.
...
> + pmx->pctl = devm_pinctrl_register(dev, &ep93xx_pmx_desc, pmx);
> + if (IS_ERR(pmx->pctl)) {
> + dev_err(dev, "could not register pinmux driver\n");
> + return PTR_ERR(pmx->pctl);
Why not dev_err_probe() as elsewhere?
> + }
...
> +static int __init ep93xx_pmx_init(void)
> +{
> + return platform_driver_register(&ep93xx_pmx_driver);
> +}
> +arch_initcall(ep93xx_pmx_init);
+ blank line.
Also add everywhere MODULE_DESCRIPTION() as modpost recently started to
complain (probably with `make W=1` which you should execute anyway for
your new code).
> +MODULE_IMPORT_NS(EP93XX_SOC);
--
With Best Regards,
Andy Shevchenko
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