use i2c-gpio until we add the hw drivers
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@xxxxxxxxxxxx>
---
arch/arm/mach-at91/at91sam9x5_devices.c | 58 +++++++++++++++++++++++++++++++
arch/arm/mach-at91/include/mach/board.h | 3 ++
2 files changed, 61 insertions(+)
diff --git a/arch/arm/mach-at91/at91sam9x5_devices.c b/arch/arm/mach-at91/at91sam9x5_devices.c
index 26a380d..5a24325 100644
--- a/arch/arm/mach-at91/at91sam9x5_devices.c
+++ b/arch/arm/mach-at91/at91sam9x5_devices.c
@@ -19,6 +19,7 @@
#include <mach/gpio.h>
#include <mach/io.h>
#include <mach/cpu.h>
+#include <i2c/i2c-gpio.h>
#include "generic.h"
@@ -169,6 +170,63 @@ void __init at91_add_device_nand(struct atmel_nand_data *data)
void __init at91_add_device_nand(struct atmel_nand_data *data) {}
#endif
+#if defined(CONFIG_I2C_GPIO)
+static struct i2c_gpio_platform_data pdata_i2c0 = {
+ .sda_pin = AT91_PIN_PA30,
+ .sda_is_open_drain = 1,
+ .scl_pin = AT91_PIN_PA31,
+ .scl_is_open_drain = 1,
+ .udelay = 5, /* ~100 kHz */
+};
+
+static struct i2c_gpio_platform_data pdata_i2c1 = {
+ .sda_pin = AT91_PIN_PC0,
+ .sda_is_open_drain = 1,
+ .scl_pin = AT91_PIN_PC1,
+ .scl_is_open_drain = 1,
+ .udelay = 5, /* ~100 kHz */
+};
+
+static struct i2c_gpio_platform_data pdata_i2c2 = {
+ .sda_pin = AT91_PIN_PB4,
+ .sda_is_open_drain = 1,
+ .scl_pin = AT91_PIN_PB5,
+ .scl_is_open_drain = 1,
+ .udelay = 5, /* ~100 kHz */
+};
+
+void at91_add_device_i2c(short i2c_id, struct i2c_board_info *devices, int nr_devices)
+{
+ struct i2c_gpio_platform_data *pdata;
+
+ i2c_register_board_info(i2c_id, devices, nr_devices);
+
+ switch (i2c_id) {
+ case 0:
+ pdata = &pdata_i2c0;
+ break;
+ case 1:
+ pdata = &pdata_i2c1;
+ break;
+ case 2:
+ pdata = &pdata_i2c2;
+ break;
+ default:
+ return;
+ }
+
+ at91_set_GPIO_periph(pdata->sda_pin, 1); /* TWD (SDA) */
+ at91_set_multi_drive(pdata->sda_pin, 1);
+
+ at91_set_GPIO_periph(pdata->scl_pin, 1); /* TWCK (SCL) */
+ at91_set_multi_drive(pdata->scl_pin, 1);
+
+ add_generic_device_res("i2c-gpio", i2c_id, NULL, 0, pdata);
+}
+#else
+void at91_add_device_i2c(short i2c_id, struct i2c_board_info *devices, int nr_devices) {}
+#endif
+
/* --------------------------------------------------------------------
* UART
* -------------------------------------------------------------------- */
diff --git a/arch/arm/mach-at91/include/mach/board.h b/arch/arm/mach-at91/include/mach/board.h
index 670c73d..1ce0762 100644
--- a/arch/arm/mach-at91/include/mach/board.h
+++ b/arch/arm/mach-at91/include/mach/board.h
@@ -21,6 +21,7 @@
#include <mach/hardware.h>
#include <sizes.h>
#include <net.h>
+#include <i2c/i2c.h>
#include <spi/spi.h>
#include <linux/mtd/mtd.h>
@@ -71,6 +72,8 @@ struct at91_ether_platform_data {
void at91_add_device_eth(int id, struct at91_ether_platform_data *data);
+void at91_add_device_i2c(short i2c_id, struct i2c_board_info *devices, int nr_devices);
+
/* SDRAM */
void at91_add_device_sdram(u32 size);
--
1.7.10.4
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