linux-kernel - [RFC v5 net-next 07/13] mfd: ocelot: enable the external switch interface

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Message-Id: <20211218214954.109755-8-colin.foster@in-advantage.com>
Date:   Sat, 18 Dec 2021 13:49:48 -0800
From:   Colin Foster <colin.foster@...advantage.com>
To:     linux-gpio@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Russell King <linux@...linux.org.uk>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Andrew Lunn <andrew@...n.ch>, UNGLinuxDriver@...rochip.com,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Vladimir Oltean <vladimir.oltean@....com>,
        Lee Jones <lee.jones@...aro.org>
Subject: [RFC v5 net-next 07/13] mfd: ocelot: enable the external switch interface

Add the ocelot-ext child device to the MFD. This will enable device-tree
configuration of the MFD to include the external switch, if desired.

Signed-off-by: Colin Foster <colin.foster@...advantage.com>
---
 drivers/mfd/ocelot-core.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/mfd/ocelot-core.c b/drivers/mfd/ocelot-core.c
index 09132ea52760..52aa7b824d02 100644
--- a/drivers/mfd/ocelot-core.c
+++ b/drivers/mfd/ocelot-core.c
@@ -6,6 +6,7 @@
 #include <asm/byteorder.h>
 #include <linux/spi/spi.h>
 #include <linux/kconfig.h>
+#include <linux/mfd/core.h>
 #include <linux/module.h>
 #include <linux/regmap.h>
 
@@ -103,6 +104,13 @@ struct regmap *ocelot_mfd_get_regmap_from_resource(struct device *dev,
 }
 EXPORT_SYMBOL(ocelot_mfd_get_regmap_from_resource);
 
+static const struct mfd_cell vsc7512_devs[] = {
+	{
+		.name = "ocelot-ext-switch",
+		.of_compatible = "mscc,vsc7512-ext-switch",
+	},
+};
+
 int ocelot_mfd_init(struct ocelot_mfd_config *config)
 {
 	struct device *dev = config->dev;
@@ -139,7 +147,10 @@ int ocelot_mfd_init(struct ocelot_mfd_config *config)
 		return ret;
 	}
 
-	/* Create and loop over all child devices here */
+	ret = mfd_add_devices(dev, PLATFORM_DEVID_NONE, vsc7512_devs,
+			      ARRAY_SIZE(vsc7512_devs), NULL, 0, NULL);
+
+	dev_info(dev, "ocelot mfd core setup complete\n");
 
 	return 0;
 }
@@ -147,7 +158,7 @@ EXPORT_SYMBOL(ocelot_mfd_init);
 
 int ocelot_mfd_remove(struct ocelot_mfd_config *config)
 {
-	/* Loop over all children and remove them */
+	mfd_remove_devices(config->dev);
 
 	return 0;
 }
-- 
2.25.1