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-rw-r--r--packages/linux/linux-2.6.22+2.6.23-rc5/ts72xx/ep93xx-i2c-bus.diff220
1 files changed, 220 insertions, 0 deletions
diff --git a/packages/linux/linux-2.6.22+2.6.23-rc5/ts72xx/ep93xx-i2c-bus.diff b/packages/linux/linux-2.6.22+2.6.23-rc5/ts72xx/ep93xx-i2c-bus.diff
new file mode 100644
index 0000000000..efdbf42a45
--- /dev/null
+++ b/packages/linux/linux-2.6.22+2.6.23-rc5/ts72xx/ep93xx-i2c-bus.diff
@@ -0,0 +1,220 @@
+
+I2C bus driver using ep93xx GPIOs.
+
+Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
+
+Index: linux-2.6.23-rc5/drivers/i2c/busses/Kconfig
+===================================================================
+--- linux-2.6.23-rc5.orig/drivers/i2c/busses/Kconfig 2007-09-04 02:25:36.000000000 +0200
++++ linux-2.6.23-rc5/drivers/i2c/busses/Kconfig 2007-09-04 02:26:20.000000000 +0200
+@@ -654,4 +654,16 @@
+ This driver can also be built as module. If so, the module
+ will be called i2c-pmcmsp.
+
++config I2C_EP93XX
++ tristate "Cirrus Logic EP93XX GPIO-based I2C interface"
++ depends on I2C && ARCH_EP93XX
++ select I2C_ALGOBIT
++ help
++ Say Y here if you have an Cirrus Logic EP93XX based
++ system and are using GPIO lines for an I2C bus.
++
++ This support is also available as a module. If so, the module
++ will be called i2c-ep93xx.
++
++
+ endmenu
+Index: linux-2.6.23-rc5/drivers/i2c/busses/Makefile
+===================================================================
+--- linux-2.6.23-rc5.orig/drivers/i2c/busses/Makefile 2007-09-04 02:25:36.000000000 +0200
++++ linux-2.6.23-rc5/drivers/i2c/busses/Makefile 2007-09-04 02:26:20.000000000 +0200
+@@ -52,6 +52,7 @@
+ obj-$(CONFIG_I2C_VOODOO3) += i2c-voodoo3.o
+ obj-$(CONFIG_SCx200_ACB) += scx200_acb.o
+ obj-$(CONFIG_SCx200_I2C) += scx200_i2c.o
++obj-$(CONFIG_I2C_EP93XX) += i2c-ep93xx.o
+
+ ifeq ($(CONFIG_I2C_DEBUG_BUS),y)
+ EXTRA_CFLAGS += -DDEBUG
+Index: linux-2.6.23-rc5/drivers/i2c/busses/i2c-ep93xx.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.23-rc5/drivers/i2c/busses/i2c-ep93xx.c 2007-09-04 02:26:20.000000000 +0200
+@@ -0,0 +1,159 @@
++/*
++ * EP93XX I2C bus driver.
++ * Copyright (C) 2007 Lennert Buytenhek <buytenh@wantstofly.org>
++ *
++ * An I2C bus driver for the Cirrus Logic EP93xx SoC.
++ *
++ * Based on an earlier version by Alessandro Zummo.
++ */
++
++#include <linux/kernel.h>
++#include <linux/platform_device.h>
++#include <linux/module.h>
++#include <linux/i2c.h>
++#include <linux/i2c-algo-bit.h>
++#include <asm/hardware.h>
++#include <asm/arch/gpio.h>
++
++struct ep93xx_i2c_priv {
++ struct ep93xx_i2c_data *data;
++ struct i2c_adapter adapter;
++ struct i2c_algo_bit_data algo_data;
++ int sda;
++ int scl;
++};
++
++
++static void ep93xx_bit_setsda(void *cookie, int val)
++{
++ struct ep93xx_i2c_priv *priv = cookie;
++
++ if (val) {
++ gpio_line_config(priv->data->sda_pin, GPIO_IN);
++ if (priv->scl && !priv->sda && priv->data->stop != NULL)
++ priv->data->stop(priv->data->cookie);
++ priv->sda = 1;
++ } else {
++ if (priv->scl && priv->sda && priv->data->start != NULL)
++ priv->data->start(priv->data->cookie);
++ gpio_line_config(priv->data->sda_pin, GPIO_OUT);
++ gpio_line_set(priv->data->sda_pin, 0);
++ priv->sda = 0;
++ }
++}
++
++static void ep93xx_bit_setscl(void *cookie, int val)
++{
++ struct ep93xx_i2c_priv *priv = cookie;
++
++ if (val) {
++ gpio_line_config(priv->data->scl_pin, GPIO_IN);
++ priv->scl = 1;
++ } else {
++ gpio_line_config(priv->data->scl_pin, GPIO_OUT);
++ gpio_line_set(priv->data->scl_pin, 0);
++ priv->scl = 0;
++ }
++}
++
++static int ep93xx_bit_getsda(void *cookie)
++{
++ struct ep93xx_i2c_priv *priv = cookie;
++
++ if (priv->sda == 0)
++ BUG();
++
++ return gpio_line_get(priv->data->sda_pin);
++}
++
++static int ep93xx_bit_getscl(void *cookie)
++{
++ struct ep93xx_i2c_priv *priv = cookie;
++
++ if (priv->scl == 0)
++ BUG();
++
++ return gpio_line_get(priv->data->scl_pin);
++}
++
++
++static int ep93xx_i2c_probe(struct platform_device *pdev)
++{
++ struct ep93xx_i2c_priv *priv;
++ int err;
++
++ priv = kzalloc(sizeof(struct ep93xx_i2c_priv), GFP_KERNEL);
++ if (priv == NULL)
++ return -ENOMEM;
++
++ priv->data = pdev->dev.platform_data;
++
++ strlcpy(priv->adapter.name, pdev->dev.driver->name, I2C_NAME_SIZE);
++ priv->adapter.algo_data = &priv->algo_data;
++ priv->adapter.class = I2C_CLASS_ALL;
++ priv->adapter.dev.parent = &pdev->dev;
++
++ priv->algo_data.data = priv;
++ priv->algo_data.setsda = ep93xx_bit_setsda;
++ priv->algo_data.setscl = ep93xx_bit_setscl;
++ priv->algo_data.getsda = ep93xx_bit_getsda;
++ priv->algo_data.getscl = ep93xx_bit_getscl;
++ priv->algo_data.udelay = 10;
++ priv->algo_data.timeout = 100;
++
++ priv->sda = 1;
++ gpio_line_config(priv->data->sda_pin, GPIO_IN);
++
++ priv->scl = 1;
++ gpio_line_config(priv->data->scl_pin, GPIO_IN);
++
++ err = i2c_bit_add_bus(&priv->adapter);
++ if (err) {
++ printk(KERN_ERR "ERROR: Could not install %s\n",
++ pdev->dev.bus_id);
++ kfree(priv);
++ return err;
++ }
++
++ platform_set_drvdata(pdev, priv);
++
++ return 0;
++}
++
++static int ep93xx_i2c_remove(struct platform_device *pdev)
++{
++ struct ep93xx_i2c_priv *priv;
++
++ priv = platform_get_drvdata(pdev);
++ i2c_del_adapter(&priv->adapter);
++ platform_set_drvdata(pdev, NULL);
++ kfree(priv);
++
++ return 0;
++}
++
++static struct platform_driver ep93xx_i2c_driver = {
++ .probe = ep93xx_i2c_probe,
++ .remove = ep93xx_i2c_remove,
++ .driver = {
++ .name = "ep93xx-i2c",
++ .owner = THIS_MODULE,
++ },
++};
++
++static int __init ep93xx_i2c_init(void)
++{
++ return platform_driver_register(&ep93xx_i2c_driver);
++}
++
++static void __exit ep93xx_i2c_exit(void)
++{
++ platform_driver_unregister(&ep93xx_i2c_driver);
++}
++
++module_init(ep93xx_i2c_init);
++module_exit(ep93xx_i2c_exit);
++
++MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
++MODULE_DESCRIPTION("GPIO-based I2C adapter for EP93XX systems");
++MODULE_LICENSE("GPL");
+Index: linux-2.6.23-rc5/include/asm-arm/arch-ep93xx/platform.h
+===================================================================
+--- linux-2.6.23-rc5.orig/include/asm-arm/arch-ep93xx/platform.h 2007-09-04 02:25:36.000000000 +0200
++++ linux-2.6.23-rc5/include/asm-arm/arch-ep93xx/platform.h 2007-09-04 02:28:19.000000000 +0200
+@@ -16,5 +16,13 @@
+ unsigned char phy_id;
+ };
+
++struct ep93xx_i2c_data {
++ int sda_pin;
++ int scl_pin;
++ void *cookie;
++ void (*start)(void *);
++ void (*stop)(void *);
++};
++
+
+ #endif
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-04-30 20:19:05 +0000