41561f28e7
New I2C bus driver for Philips ARM boards (Philips IP3204 I2C IP block). This I2C controller can be found on (at least) PNX010x, PNX52xx and PNX4008 Philips boards. Signed-off-by: Vitaly Wool <vitalywool@gmail.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
167 lines
3.4 KiB
C
167 lines
3.4 KiB
C
/*
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* I2C initialization for PNX4008.
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*
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* Author: Vitaly Wool <vitalywool@gmail.com>
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*
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* 2005-2006 (c) MontaVista Software, Inc. This file is licensed under
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* the terms of the GNU General Public License version 2. This program
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* is licensed "as is" without any warranty of any kind, whether express
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* or implied.
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*/
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#include <linux/clk.h>
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#include <linux/i2c.h>
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#include <linux/i2c-pnx.h>
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#include <linux/platform_device.h>
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#include <linux/err.h>
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#include <asm/arch/platform.h>
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#include <asm/arch/i2c.h>
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static int set_clock_run(struct platform_device *pdev)
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{
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struct clk *clk;
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char name[10];
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int retval = 0;
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snprintf(name, 10, "i2c%d_ck", pdev->id);
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clk = clk_get(&pdev->dev, name);
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if (!IS_ERR(clk)) {
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clk_set_rate(clk, 1);
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clk_put(clk);
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} else
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retval = -ENOENT;
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return retval;
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}
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static int set_clock_stop(struct platform_device *pdev)
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{
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struct clk *clk;
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char name[10];
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int retval = 0;
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snprintf(name, 10, "i2c%d_ck", pdev->id);
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clk = clk_get(&pdev->dev, name);
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if (!IS_ERR(clk)) {
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clk_set_rate(clk, 0);
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clk_put(clk);
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} else
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retval = -ENOENT;
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return retval;
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}
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static int i2c_pnx_suspend(struct platform_device *pdev, pm_message_t state)
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{
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int retval = 0;
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#ifdef CONFIG_PM
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retval = set_clock_run(pdev);
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#endif
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return retval;
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}
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static int i2c_pnx_resume(struct platform_device *pdev)
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{
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int retval = 0;
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#ifdef CONFIG_PM
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retval = set_clock_run(pdev);
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#endif
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return retval;
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}
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static u32 calculate_input_freq(struct platform_device *pdev)
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{
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return HCLK_MHZ;
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}
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static struct i2c_pnx_algo_data pnx_algo_data0 = {
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.base = PNX4008_I2C1_BASE,
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.irq = I2C_1_INT,
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};
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static struct i2c_pnx_algo_data pnx_algo_data1 = {
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.base = PNX4008_I2C2_BASE,
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.irq = I2C_2_INT,
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};
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static struct i2c_pnx_algo_data pnx_algo_data2 = {
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.base = (PNX4008_USB_CONFIG_BASE + 0x300),
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.irq = USB_I2C_INT,
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};
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static struct i2c_adapter pnx_adapter0 = {
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.name = I2C_CHIP_NAME "0",
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.algo_data = &pnx_algo_data0,
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};
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static struct i2c_adapter pnx_adapter1 = {
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.name = I2C_CHIP_NAME "1",
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.algo_data = &pnx_algo_data1,
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};
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static struct i2c_adapter pnx_adapter2 = {
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.name = "USB-I2C",
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.algo_data = &pnx_algo_data2,
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};
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static struct i2c_pnx_data i2c0_data = {
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.suspend = i2c_pnx_suspend,
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.resume = i2c_pnx_resume,
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.calculate_input_freq = calculate_input_freq,
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.set_clock_run = set_clock_run,
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.set_clock_stop = set_clock_stop,
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.adapter = &pnx_adapter0,
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};
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static struct i2c_pnx_data i2c1_data = {
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.suspend = i2c_pnx_suspend,
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.resume = i2c_pnx_resume,
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.calculate_input_freq = calculate_input_freq,
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.set_clock_run = set_clock_run,
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.set_clock_stop = set_clock_stop,
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.adapter = &pnx_adapter1,
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};
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static struct i2c_pnx_data i2c2_data = {
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.suspend = i2c_pnx_suspend,
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.resume = i2c_pnx_resume,
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.calculate_input_freq = calculate_input_freq,
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.set_clock_run = set_clock_run,
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.set_clock_stop = set_clock_stop,
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.adapter = &pnx_adapter2,
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};
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static struct platform_device i2c0_device = {
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.name = "pnx-i2c",
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.id = 0,
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.dev = {
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.platform_data = &i2c0_data,
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},
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};
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static struct platform_device i2c1_device = {
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.name = "pnx-i2c",
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.id = 1,
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.dev = {
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.platform_data = &i2c1_data,
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},
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};
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static struct platform_device i2c2_device = {
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.name = "pnx-i2c",
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.id = 2,
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.dev = {
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.platform_data = &i2c2_data,
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},
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};
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static struct platform_device *devices[] __initdata = {
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&i2c0_device,
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&i2c1_device,
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&i2c2_device,
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};
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void __init pnx4008_register_i2c_devices(void)
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{
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platform_add_devices(devices, ARRAY_SIZE(devices));
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}
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