diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/i2c/busses/i2c-versatile.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/i2c/busses/i2c-versatile.c | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/ANDROID_3.4.5/drivers/i2c/busses/i2c-versatile.c b/ANDROID_3.4.5/drivers/i2c/busses/i2c-versatile.c deleted file mode 100644 index f585aead..00000000 --- a/ANDROID_3.4.5/drivers/i2c/busses/i2c-versatile.c +++ /dev/null @@ -1,170 +0,0 @@ -/* - * i2c-versatile.c - * - * Copyright (C) 2006 ARM Ltd. - * written by Russell King, Deep Blue Solutions Ltd. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/i2c.h> -#include <linux/i2c-algo-bit.h> -#include <linux/init.h> -#include <linux/platform_device.h> -#include <linux/slab.h> -#include <linux/io.h> -#include <linux/of_i2c.h> - -#define I2C_CONTROL 0x00 -#define I2C_CONTROLS 0x00 -#define I2C_CONTROLC 0x04 -#define SCL (1 << 0) -#define SDA (1 << 1) - -struct i2c_versatile { - struct i2c_adapter adap; - struct i2c_algo_bit_data algo; - void __iomem *base; -}; - -static void i2c_versatile_setsda(void *data, int state) -{ - struct i2c_versatile *i2c = data; - - writel(SDA, i2c->base + (state ? I2C_CONTROLS : I2C_CONTROLC)); -} - -static void i2c_versatile_setscl(void *data, int state) -{ - struct i2c_versatile *i2c = data; - - writel(SCL, i2c->base + (state ? I2C_CONTROLS : I2C_CONTROLC)); -} - -static int i2c_versatile_getsda(void *data) -{ - struct i2c_versatile *i2c = data; - return !!(readl(i2c->base + I2C_CONTROL) & SDA); -} - -static int i2c_versatile_getscl(void *data) -{ - struct i2c_versatile *i2c = data; - return !!(readl(i2c->base + I2C_CONTROL) & SCL); -} - -static struct i2c_algo_bit_data i2c_versatile_algo = { - .setsda = i2c_versatile_setsda, - .setscl = i2c_versatile_setscl, - .getsda = i2c_versatile_getsda, - .getscl = i2c_versatile_getscl, - .udelay = 30, - .timeout = HZ, -}; - -static int i2c_versatile_probe(struct platform_device *dev) -{ - struct i2c_versatile *i2c; - struct resource *r; - int ret; - - r = platform_get_resource(dev, IORESOURCE_MEM, 0); - if (!r) { - ret = -EINVAL; - goto err_out; - } - - if (!request_mem_region(r->start, resource_size(r), "versatile-i2c")) { - ret = -EBUSY; - goto err_out; - } - - i2c = kzalloc(sizeof(struct i2c_versatile), GFP_KERNEL); - if (!i2c) { - ret = -ENOMEM; - goto err_release; - } - - i2c->base = ioremap(r->start, resource_size(r)); - if (!i2c->base) { - ret = -ENOMEM; - goto err_free; - } - - writel(SCL | SDA, i2c->base + I2C_CONTROLS); - - i2c->adap.owner = THIS_MODULE; - strlcpy(i2c->adap.name, "Versatile I2C adapter", sizeof(i2c->adap.name)); - i2c->adap.algo_data = &i2c->algo; - i2c->adap.dev.parent = &dev->dev; - i2c->adap.dev.of_node = dev->dev.of_node; - i2c->algo = i2c_versatile_algo; - i2c->algo.data = i2c; - - if (dev->id >= 0) { - /* static bus numbering */ - i2c->adap.nr = dev->id; - ret = i2c_bit_add_numbered_bus(&i2c->adap); - } else - /* dynamic bus numbering */ - ret = i2c_bit_add_bus(&i2c->adap); - if (ret >= 0) { - platform_set_drvdata(dev, i2c); - of_i2c_register_devices(&i2c->adap); - return 0; - } - - iounmap(i2c->base); - err_free: - kfree(i2c); - err_release: - release_mem_region(r->start, resource_size(r)); - err_out: - return ret; -} - -static int i2c_versatile_remove(struct platform_device *dev) -{ - struct i2c_versatile *i2c = platform_get_drvdata(dev); - - platform_set_drvdata(dev, NULL); - - i2c_del_adapter(&i2c->adap); - return 0; -} - -static const struct of_device_id i2c_versatile_match[] = { - { .compatible = "arm,versatile-i2c", }, - {}, -}; -MODULE_DEVICE_TABLE(of, i2c_versatile_match); - -static struct platform_driver i2c_versatile_driver = { - .probe = i2c_versatile_probe, - .remove = i2c_versatile_remove, - .driver = { - .name = "versatile-i2c", - .owner = THIS_MODULE, - .of_match_table = i2c_versatile_match, - }, -}; - -static int __init i2c_versatile_init(void) -{ - return platform_driver_register(&i2c_versatile_driver); -} - -static void __exit i2c_versatile_exit(void) -{ - platform_driver_unregister(&i2c_versatile_driver); -} - -subsys_initcall(i2c_versatile_init); -module_exit(i2c_versatile_exit); - -MODULE_DESCRIPTION("ARM Versatile I2C bus driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:versatile-i2c"); |