use i2c-gpio as the hw ip is broken
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
---
arch/arm/mach-at91/at91sam9g45_devices.c | 50 ++++++++++++++++++++++++++++++
1 file changed, 50 insertions(+)
diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c
b/arch/arm/mach-at91/at91sam9g45_devices.c
index 22b455e..35cd2e7 100644
--- a/arch/arm/mach-at91/at91sam9g45_devices.c
+++ b/arch/arm/mach-at91/at91sam9g45_devices.c
@@ -18,6 +18,7 @@
#include <mach/board.h>
#include <mach/gpio.h>
#include <mach/io.h>
+#include <i2c/i2c-gpio.h>
#include "generic.h"
@@ -132,6 +133,55 @@ void at91_add_device_nand(struct atmel_nand_data *data)
void at91_add_device_nand(struct atmel_nand_data *data) {}
#endif
+/* --------------------------------------------------------------------
+ * TWI (i2c)
+ * -------------------------------------------------------------------- */
+#if defined(CONFIG_I2C_GPIO) || defined(CONFIG_I2C_GPIO_MODULE)
+static struct i2c_gpio_platform_data pdata_i2c0 = {
+ .sda_pin = AT91_PIN_PA20,
+ .sda_is_open_drain = 1,
+ .scl_pin = AT91_PIN_PA21,
+ .scl_is_open_drain = 1,
+ .udelay = 5, /* ~100 kHz */
+};
+
+static struct i2c_gpio_platform_data pdata_i2c1 = {
+ .sda_pin = AT91_PIN_PB10,
+ .sda_is_open_drain = 1,
+ .scl_pin = AT91_PIN_PB11,
+ .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 = &pdata_i2c;
+
+ i2c_register_board_info(i2c_id, devices, nr_devices);
+
+ switch (i2c_id) {
+ case 0;
+ pdata = &pdata_i2c0;
+ break;
+ case 1;
+ pdata = &pdata_i2c1;
+ 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
+
resource_size_t __init at91_configure_dbgu(void)
{
at91_set_A_periph(AT91_PIN_PB12, 0); /* DRXD */
--
1.7.10.4
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