/* * TI SMSC MFD Driver * * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com * * Author: Sourav Poddar <sourav.poddar@ti.com> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; GPL v2. * */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/slab.h> #include <linux/i2c.h> #include <linux/gpio.h> #include <linux/workqueue.h> #include <linux/irq.h> #include <linux/regmap.h> #include <linux/err.h> #include <linux/mfd/core.h> #include <linux/mfd/smsc.h> #include <linux/of_platform.h> static struct regmap_config smsc_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = SMSC_VEN_ID_H, .cache_type = REGCACHE_RBTREE, }; static int smsc_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct smsc *smsc; int devid, rev, venid_l, venid_h; int ret = 0; smsc = devm_kzalloc(&i2c->dev, sizeof(struct smsc), GFP_KERNEL); if (!smsc) { dev_err(&i2c->dev, "smsc mfd driver memory allocation failed\n"); return -ENOMEM; } smsc->regmap = devm_regmap_init_i2c(i2c, &smsc_regmap_config); if (IS_ERR(smsc->regmap)) { ret = PTR_ERR(smsc->regmap); goto err; } i2c_set_clientdata(i2c, smsc); smsc->dev = &i2c->dev; #ifdef CONFIG_OF of_property_read_u32(i2c->dev.of_node, "clock", &smsc->clk); #endif regmap_read(smsc->regmap, SMSC_DEV_ID, &devid); regmap_read(smsc->regmap, SMSC_DEV_REV, &rev); regmap_read(smsc->regmap, SMSC_VEN_ID_L, &venid_l); regmap_read(smsc->regmap, SMSC_VEN_ID_H, &venid_h); dev_info(&i2c->dev, "SMSCxxx devid: %02x rev: %02x venid: %02x\n", devid, rev, (venid_h << 8) | venid_l); ret = regmap_write(smsc->regmap, SMSC_CLK_CTRL, smsc->clk); if (ret) goto err; #ifdef CONFIG_OF if (i2c->dev.of_node) ret = of_platform_populate(i2c->dev.of_node, NULL, NULL, &i2c->dev); #endif err: return ret; } static int smsc_i2c_remove(struct i2c_client *i2c) { struct smsc *smsc = i2c_get_clientdata(i2c); mfd_remove_devices(smsc->dev); return 0; } static const struct i2c_device_id smsc_i2c_id[] = { { "smscece1099", 0}, {}, }; MODULE_DEVICE_TABLE(i2c, smsc_i2c_id); static struct i2c_driver smsc_i2c_driver = { .driver = { .name = "smsc", .owner = THIS_MODULE, }, .probe = smsc_i2c_probe, .remove = smsc_i2c_remove, .id_table = smsc_i2c_id, }; module_i2c_driver(smsc_i2c_driver); MODULE_AUTHOR("Sourav Poddar <sourav.poddar@ti.com>"); MODULE_DESCRIPTION("SMSC chip multi-function driver"); MODULE_LICENSE("GPL v2");