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-rw-r--r--arch/arm/mach-pnx4008/Makefile2
-rw-r--r--arch/arm/mach-pnx4008/i2c.c167
-rw-r--r--arch/arm/mach-realview/core.c13
-rw-r--r--arch/arm/mach-realview/core.h1
-rw-r--r--arch/arm/mach-realview/realview_eb.c1
-rw-r--r--arch/arm/mach-versatile/core.c14
6 files changed, 197 insertions, 1 deletions
diff --git a/arch/arm/mach-pnx4008/Makefile b/arch/arm/mach-pnx4008/Makefile
index b457ca0a431a..777564c90a12 100644
--- a/arch/arm/mach-pnx4008/Makefile
+++ b/arch/arm/mach-pnx4008/Makefile
@@ -2,7 +2,7 @@
# Makefile for the linux kernel.
#
-obj-y := core.o irq.o time.o clock.o gpio.o serial.o dma.o
+obj-y := core.o irq.o time.o clock.o gpio.o serial.o dma.o i2c.o
obj-m :=
obj-n :=
obj- :=
diff --git a/arch/arm/mach-pnx4008/i2c.c b/arch/arm/mach-pnx4008/i2c.c
new file mode 100644
index 000000000000..6f308827c4fe
--- /dev/null
+++ b/arch/arm/mach-pnx4008/i2c.c
@@ -0,0 +1,167 @@
+/*
+ * I2C initialization for PNX4008.
+ *
+ * Author: Vitaly Wool <vitalywool@gmail.com>
+ *
+ * 2005-2006 (c) MontaVista Software, Inc. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+
+#include <linux/clk.h>
+#include <linux/i2c.h>
+#include <linux/i2c-pnx.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <asm/arch/platform.h>
+#include <asm/arch/i2c.h>
+
+static int set_clock_run(struct platform_device *pdev)
+{
+ struct clk *clk;
+ char name[10];
+ int retval = 0;
+
+ snprintf(name, 10, "i2c%d_ck", pdev->id);
+ clk = clk_get(&pdev->dev, name);
+ if (!IS_ERR(clk)) {
+ clk_set_rate(clk, 1);
+ clk_put(clk);
+ } else
+ retval = -ENOENT;
+
+ return retval;
+}
+
+static int set_clock_stop(struct platform_device *pdev)
+{
+ struct clk *clk;
+ char name[10];
+ int retval = 0;
+
+ snprintf(name, 10, "i2c%d_ck", pdev->id);
+ clk = clk_get(&pdev->dev, name);
+ if (!IS_ERR(clk)) {
+ clk_set_rate(clk, 0);
+ clk_put(clk);
+ } else
+ retval = -ENOENT;
+
+ return retval;
+}
+
+static int i2c_pnx_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ int retval = 0;
+#ifdef CONFIG_PM
+ retval = set_clock_run(pdev);
+#endif
+ return retval;
+}
+
+static int i2c_pnx_resume(struct platform_device *pdev)
+{
+ int retval = 0;
+#ifdef CONFIG_PM
+ retval = set_clock_run(pdev);
+#endif
+ return retval;
+}
+
+static u32 calculate_input_freq(struct platform_device *pdev)
+{
+ return HCLK_MHZ;
+}
+
+
+static struct i2c_pnx_algo_data pnx_algo_data0 = {
+ .base = PNX4008_I2C1_BASE,
+ .irq = I2C_1_INT,
+};
+
+static struct i2c_pnx_algo_data pnx_algo_data1 = {
+ .base = PNX4008_I2C2_BASE,
+ .irq = I2C_2_INT,
+};
+
+static struct i2c_pnx_algo_data pnx_algo_data2 = {
+ .base = (PNX4008_USB_CONFIG_BASE + 0x300),
+ .irq = USB_I2C_INT,
+};
+
+static struct i2c_adapter pnx_adapter0 = {
+ .name = I2C_CHIP_NAME "0",
+ .algo_data = &pnx_algo_data0,
+};
+static struct i2c_adapter pnx_adapter1 = {
+ .name = I2C_CHIP_NAME "1",
+ .algo_data = &pnx_algo_data1,
+};
+
+static struct i2c_adapter pnx_adapter2 = {
+ .name = "USB-I2C",
+ .algo_data = &pnx_algo_data2,
+};
+
+static struct i2c_pnx_data i2c0_data = {
+ .suspend = i2c_pnx_suspend,
+ .resume = i2c_pnx_resume,
+ .calculate_input_freq = calculate_input_freq,
+ .set_clock_run = set_clock_run,
+ .set_clock_stop = set_clock_stop,
+ .adapter = &pnx_adapter0,
+};
+
+static struct i2c_pnx_data i2c1_data = {
+ .suspend = i2c_pnx_suspend,
+ .resume = i2c_pnx_resume,
+ .calculate_input_freq = calculate_input_freq,
+ .set_clock_run = set_clock_run,
+ .set_clock_stop = set_clock_stop,
+ .adapter = &pnx_adapter1,
+};
+
+static struct i2c_pnx_data i2c2_data = {
+ .suspend = i2c_pnx_suspend,
+ .resume = i2c_pnx_resume,
+ .calculate_input_freq = calculate_input_freq,
+ .set_clock_run = set_clock_run,
+ .set_clock_stop = set_clock_stop,
+ .adapter = &pnx_adapter2,
+};
+
+static struct platform_device i2c0_device = {
+ .name = "pnx-i2c",
+ .id = 0,
+ .dev = {
+ .platform_data = &i2c0_data,
+ },
+};
+
+static struct platform_device i2c1_device = {
+ .name = "pnx-i2c",
+ .id = 1,
+ .dev = {
+ .platform_data = &i2c1_data,
+ },
+};
+
+static struct platform_device i2c2_device = {
+ .name = "pnx-i2c",
+ .id = 2,
+ .dev = {
+ .platform_data = &i2c2_data,
+ },
+};
+
+static struct platform_device *devices[] __initdata = {
+ &i2c0_device,
+ &i2c1_device,
+ &i2c2_device,
+};
+
+void __init pnx4008_register_i2c_devices(void)
+{
+ platform_add_devices(devices, ARRAY_SIZE(devices));
+}
diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c
index 68c67053f479..84d3fe76e94e 100644
--- a/arch/arm/mach-realview/core.c
+++ b/arch/arm/mach-realview/core.c
@@ -141,6 +141,19 @@ struct platform_device realview_smc91x_device = {
.resource = realview_smc91x_resources,
};
+static struct resource realview_i2c_resource = {
+ .start = REALVIEW_I2C_BASE,
+ .end = REALVIEW_I2C_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+};
+
+struct platform_device realview_i2c_device = {
+ .name = "versatile-i2c",
+ .id = -1,
+ .num_resources = 1,
+ .resource = &realview_i2c_resource,
+};
+
#define REALVIEW_SYSMCI (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_MCI_OFFSET)
static unsigned int realview_mmc_status(struct device *dev)
diff --git a/arch/arm/mach-realview/core.h b/arch/arm/mach-realview/core.h
index 93e86d9f439c..2b53420f9c1b 100644
--- a/arch/arm/mach-realview/core.h
+++ b/arch/arm/mach-realview/core.h
@@ -108,6 +108,7 @@ static struct amba_device name##_device = { \
extern struct platform_device realview_flash_device;
extern struct platform_device realview_smc91x_device;
+extern struct platform_device realview_i2c_device;
extern struct mmc_platform_data realview_mmc0_plat_data;
extern struct mmc_platform_data realview_mmc1_plat_data;
extern struct clk realview_clcd_clk;
diff --git a/arch/arm/mach-realview/realview_eb.c b/arch/arm/mach-realview/realview_eb.c
index 84a959530fb6..9741b4d3c9cf 100644
--- a/arch/arm/mach-realview/realview_eb.c
+++ b/arch/arm/mach-realview/realview_eb.c
@@ -155,6 +155,7 @@ static void __init realview_eb_init(void)
platform_device_register(&realview_flash_device);
platform_device_register(&realview_smc91x_device);
+ platform_device_register(&realview_i2c_device);
for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
struct amba_device *d = amba_devs[i];
diff --git a/arch/arm/mach-versatile/core.c b/arch/arm/mach-versatile/core.c
index 57196947559f..bf71507c76fd 100644
--- a/arch/arm/mach-versatile/core.c
+++ b/arch/arm/mach-versatile/core.c
@@ -325,6 +325,19 @@ static struct platform_device smc91x_device = {
.resource = smc91x_resources,
};
+static struct resource versatile_i2c_resource = {
+ .start = VERSATILE_I2C_BASE,
+ .end = VERSATILE_I2C_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+};
+
+static struct platform_device versatile_i2c_device = {
+ .name = "versatile-i2c",
+ .id = -1,
+ .num_resources = 1,
+ .resource = &versatile_i2c_resource,
+};
+
#define VERSATILE_SYSMCI (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_MCI_OFFSET)
unsigned int mmc_status(struct device *dev)
@@ -775,6 +788,7 @@ void __init versatile_init(void)
clk_register(&versatile_clcd_clk);
platform_device_register(&versatile_flash_device);
+ platform_device_register(&versatile_i2c_device);
platform_device_register(&smc91x_device);
for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.