linux-kernel - Re: [PATCH v15 mfd 9/9] mfd: ocelot: add support for the vsc7512 chip via spi

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Date:   Fri, 5 Aug 2022 10:44:16 -0700
From:   Colin Foster <colin.foster@...advantage.com>
To:     linux-arm-kernel@...ts.infradead.org, linux-gpio@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Cc:     Terry Bowman <terry.bowman@....com>,
        Vladimir Oltean <vladimir.oltean@....com>,
        Wolfram Sang <wsa@...nel.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        UNGLinuxDriver@...rochip.com,
        Steen Hegelund <Steen.Hegelund@...rochip.com>,
        Lars Povlsen <lars.povlsen@...rochip.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        "David S. Miller" <davem@...emloft.net>,
        Russell King <linux@...linux.org.uk>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Lee Jones <lee.jones@...aro.org>, katie.morris@...advantage.com
Subject: Re: [PATCH v15 mfd 9/9] mfd: ocelot: add support for the vsc7512
 chip via spi

As I'm going through Andy's suggestions, I came across a couple more
include changes / misses:

On Tue, Aug 02, 2022 at 10:47:28PM -0700, Colin Foster wrote:

...

> diff --git a/drivers/mfd/ocelot-core.c b/drivers/mfd/ocelot-core.c

...

> +
> +int ocelot_chip_reset(struct device *dev)

#include <linux/device.h>

> +{
> +	struct ocelot_ddata *ddata = dev_get_drvdata(dev);
> +	int ret, val;
> +
> +	/*
> +	 * Reset the entire chip here to put it into a completely known state.
> +	 * Other drivers may want to reset their own subsystems. The register
> +	 * self-clears, so one write is all that is needed and wait for it to
> +	 * clear.
> +	 */
> +	ret = regmap_write(ddata->gcb_regmap, REG_GCB_SOFT_RST, BIT_SOFT_CHIP_RST);
> +	if (ret)
> +		return ret;
> +
> +	return readx_poll_timeout(ocelot_gcb_chip_rst_status, ddata, val, !val,
> +				  VSC7512_GCB_RST_SLEEP_US, VSC7512_GCB_RST_TIMEOUT_US);

#include <linux/iopoll.h>

> +}
> +EXPORT_SYMBOL_NS(ocelot_chip_reset, MFD_OCELOT);

#include <linux/export.h>

> +
> +static const struct resource vsc7512_miim0_resources[] = {
> +	DEFINE_RES_REG_NAMED(VSC7512_MIIM0_RES_START, VSC7512_MIIM_RES_SIZE, "gcb_miim0"),
> +	DEFINE_RES_REG_NAMED(VSC7512_PHY_RES_START, VSC7512_PHY_RES_SIZE, "gcb_phy"),
> +};

#include <linux/ioport.h>

...

> +++ b/drivers/mfd/ocelot-spi.c

...

> +#include <linux/kconfig.h>

Not needed here - handled entirely in drivers/mfd/ocelot.h now.

...

> +
> +static int ocelot_spi_initialize(struct device *dev)

#include <linux/device.h>

> +{
> +	struct ocelot_ddata *ddata = dev_get_drvdata(dev);
> +	u32 val, check;

#include <linux/types.h>

...

> +
> +	if (check != val)
> +		return -ENODEV;

#include <linux/errno.h>

> +
> +	return 0;
> +}

...

> +
> +struct regmap *ocelot_spi_init_regmap(struct device *dev, const struct resource *res)
> +{
> +	struct regmap_config regmap_config;
> +
> +	memcpy(&regmap_config, &ocelot_spi_regmap_config, sizeof(regmap_config));
> +
> +	regmap_config.name = res->name;
> +	regmap_config.max_register = res->end - res->start;
> +	regmap_config.reg_base = res->start;
> +
> +	return devm_regmap_init(dev, &ocelot_spi_regmap_bus, dev, &regmap_config);
> +}
> +EXPORT_SYMBOL_NS(ocelot_spi_init_regmap, MFD_OCELOT_SPI);

#include <linux/export.h>

...

> +
> +	r = ocelot_spi_init_regmap(dev, &vsc7512_dev_cpuorg_resource);
> +	if (IS_ERR(r))
> +		return PTR_ERR(r);

#include <linux/err.h>

...

> +
> +static const struct spi_device_id ocelot_spi_ids[] = {

#include <linux/mod_devicetable.h>

> +	{ "vsc7512", 0 },
> +	{ }
> +};
> +
> +static const struct of_device_id ocelot_spi_of_match[] = {
> +	{ .compatible = "mscc,vsc7512" },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(of, ocelot_spi_of_match);