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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/net/dsa/microchip/ksz9477_i2c.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/net/dsa/microchip/ksz9477_i2c.c')
-rw-r--r--drivers/net/dsa/microchip/ksz9477_i2c.c132
1 files changed, 132 insertions, 0 deletions
diff --git a/drivers/net/dsa/microchip/ksz9477_i2c.c b/drivers/net/dsa/microchip/ksz9477_i2c.c
new file mode 100644
index 0000000000..2710afad4f
--- /dev/null
+++ b/drivers/net/dsa/microchip/ksz9477_i2c.c
@@ -0,0 +1,132 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Microchip KSZ9477 series register access through I2C
+ *
+ * Copyright (C) 2018-2019 Microchip Technology Inc.
+ */
+
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "ksz_common.h"
+
+KSZ_REGMAP_TABLE(ksz9477, not_used, 16, 0, 0);
+
+static int ksz9477_i2c_probe(struct i2c_client *i2c)
+{
+ struct regmap_config rc;
+ struct ksz_device *dev;
+ int i, ret;
+
+ dev = ksz_switch_alloc(&i2c->dev, i2c);
+ if (!dev)
+ return -ENOMEM;
+
+ for (i = 0; i < __KSZ_NUM_REGMAPS; i++) {
+ rc = ksz9477_regmap_config[i];
+ rc.lock_arg = &dev->regmap_mutex;
+ dev->regmap[i] = devm_regmap_init_i2c(i2c, &rc);
+ if (IS_ERR(dev->regmap[i])) {
+ return dev_err_probe(&i2c->dev, PTR_ERR(dev->regmap[i]),
+ "Failed to initialize regmap%i\n",
+ ksz9477_regmap_config[i].val_bits);
+ }
+ }
+
+ if (i2c->dev.platform_data)
+ dev->pdata = i2c->dev.platform_data;
+
+ dev->irq = i2c->irq;
+
+ ret = ksz_switch_register(dev);
+
+ /* Main DSA driver may not be started yet. */
+ if (ret)
+ return ret;
+
+ i2c_set_clientdata(i2c, dev);
+
+ return 0;
+}
+
+static void ksz9477_i2c_remove(struct i2c_client *i2c)
+{
+ struct ksz_device *dev = i2c_get_clientdata(i2c);
+
+ if (dev)
+ ksz_switch_remove(dev);
+}
+
+static void ksz9477_i2c_shutdown(struct i2c_client *i2c)
+{
+ struct ksz_device *dev = i2c_get_clientdata(i2c);
+
+ if (!dev)
+ return;
+
+ if (dev->dev_ops->reset)
+ dev->dev_ops->reset(dev);
+
+ dsa_switch_shutdown(dev->ds);
+
+ i2c_set_clientdata(i2c, NULL);
+}
+
+static const struct i2c_device_id ksz9477_i2c_id[] = {
+ { "ksz9477-switch", 0 },
+ {},
+};
+
+MODULE_DEVICE_TABLE(i2c, ksz9477_i2c_id);
+
+static const struct of_device_id ksz9477_dt_ids[] = {
+ {
+ .compatible = "microchip,ksz9477",
+ .data = &ksz_switch_chips[KSZ9477]
+ },
+ {
+ .compatible = "microchip,ksz9896",
+ .data = &ksz_switch_chips[KSZ9896]
+ },
+ {
+ .compatible = "microchip,ksz9897",
+ .data = &ksz_switch_chips[KSZ9897]
+ },
+ {
+ .compatible = "microchip,ksz9893",
+ .data = &ksz_switch_chips[KSZ9893]
+ },
+ {
+ .compatible = "microchip,ksz9563",
+ .data = &ksz_switch_chips[KSZ9563]
+ },
+ {
+ .compatible = "microchip,ksz8563",
+ .data = &ksz_switch_chips[KSZ8563]
+ },
+ {
+ .compatible = "microchip,ksz9567",
+ .data = &ksz_switch_chips[KSZ9567]
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ksz9477_dt_ids);
+
+static struct i2c_driver ksz9477_i2c_driver = {
+ .driver = {
+ .name = "ksz9477-switch",
+ .of_match_table = ksz9477_dt_ids,
+ },
+ .probe = ksz9477_i2c_probe,
+ .remove = ksz9477_i2c_remove,
+ .shutdown = ksz9477_i2c_shutdown,
+ .id_table = ksz9477_i2c_id,
+};
+
+module_i2c_driver(ksz9477_i2c_driver);
+
+MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>");
+MODULE_DESCRIPTION("Microchip KSZ9477 Series Switch I2C access Driver");
+MODULE_LICENSE("GPL v2");