f8635abd38
Support basic device tree boot on the Nomadik. Implement the support in the cpu file with the intent of deleting the board files later. At this stage IRQ controllers, system timer, l2x0 cache, UARTs and thus console boot is fully functional. Patch out the code adding devices by initcalls for now so as not to disturb the boot. Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
83 lines
1.9 KiB
C
83 lines
1.9 KiB
C
#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/i2c-algo-bit.h>
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#include <linux/i2c-gpio.h>
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#include <linux/platform_device.h>
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#include <asm/mach-types.h>
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/*
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* There are two busses in the 8815NHK.
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* They could, in theory, be driven by the hardware component, but we
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* use bit-bang through GPIO by now, to keep things simple
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*/
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/* I2C0 connected to the STw4811 power management chip */
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static struct i2c_gpio_platform_data nhk8815_i2c_data0 = {
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/* keep defaults for timeouts; pins are push-pull bidirectional */
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.scl_pin = 62,
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.sda_pin = 63,
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};
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/* I2C1 connected to various sensors */
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static struct i2c_gpio_platform_data nhk8815_i2c_data1 = {
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/* keep defaults for timeouts; pins are push-pull bidirectional */
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.scl_pin = 53,
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.sda_pin = 54,
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};
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/* I2C2 connected to the USB portions of the STw4811 only */
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static struct i2c_gpio_platform_data nhk8815_i2c_data2 = {
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/* keep defaults for timeouts; pins are push-pull bidirectional */
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.scl_pin = 73,
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.sda_pin = 74,
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};
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static struct platform_device nhk8815_i2c_dev0 = {
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.name = "i2c-gpio",
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.id = 0,
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.dev = {
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.platform_data = &nhk8815_i2c_data0,
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},
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};
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static struct platform_device nhk8815_i2c_dev1 = {
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.name = "i2c-gpio",
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.id = 1,
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.dev = {
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.platform_data = &nhk8815_i2c_data1,
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},
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};
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static struct platform_device nhk8815_i2c_dev2 = {
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.name = "i2c-gpio",
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.id = 2,
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.dev = {
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.platform_data = &nhk8815_i2c_data2,
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},
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};
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static int __init nhk8815_i2c_init(void)
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{
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/* For e.g. devicetree boot */
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if (!machine_is_nomadik())
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return 0;
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platform_device_register(&nhk8815_i2c_dev0);
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platform_device_register(&nhk8815_i2c_dev1);
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platform_device_register(&nhk8815_i2c_dev2);
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return 0;
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}
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static void __exit nhk8815_i2c_exit(void)
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{
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platform_device_unregister(&nhk8815_i2c_dev0);
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platform_device_unregister(&nhk8815_i2c_dev1);
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platform_device_unregister(&nhk8815_i2c_dev2);
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return;
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}
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module_init(nhk8815_i2c_init);
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module_exit(nhk8815_i2c_exit);
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