Add I2C gpio platform data.
This is useful for the Carambola dev board (and maybe others if they
use I2C).
Signed-off-by: Tobias Diedrich <ranma+open...@tdiedrich.de>
Index: a/target/linux/ramips/files/arch/mips/ralink/rt305x/devices.c
===================================================================
--- b/target/linux/ramips/files/arch/mips/ralink/rt305x/devices.c
2013-03-31 23:21:42.992809485 +0200
+++ a/target/linux/ramips/files/arch/mips/ralink/rt305x/devices.c
2013-03-31 23:21:50.142819472 +0200
@@ -12,6 +12,7 @@
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/clk.h>
+#include <linux/i2c-gpio.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/physmap.h>
#include <linux/spi/spi.h>
@@ -260,6 +261,33 @@
platform_device_register(&rt305x_wdt_device);
}
+static struct i2c_gpio_platform_data rt305x_i2c_pdata = {
+ .sda_pin = RT305X_GPIO_I2C_SD,
+ .scl_pin = RT305X_GPIO_I2C_SCLK,
+ .sda_is_open_drain = 0,
+ .scl_is_open_drain = 0,
+ .udelay = 10,
+};
+
+static struct platform_device rt305x_i2c_device = {
+ .name = "i2c-gpio",
+ .id = 0,
+ .dev = {
+ .platform_data = &rt305x_i2c_pdata,
+ },
+};
+
+void __init rt305x_register_i2c(void)
+{
+ /*
+ * There is even a dedicated i2c controller block, but it is probably
+ * not worth implementing support for the minimal speed gain.
+ * Just use the generic linux bitbanging and register the necessary
+ * platform data for the default I2C pin mapping the HW would use.
+ */
+ platform_device_register(&rt305x_i2c_device);
+}
+
static struct resource rt305x_spi_resources[] = {
{
.flags = IORESOURCE_MEM,
Index: a/target/linux/ramips/files/arch/mips/ralink/rt305x/devices.h
===================================================================
--- b/target/linux/ramips/files/arch/mips/ralink/rt305x/devices.h
2013-03-31 23:21:42.992809485 +0200
+++ a/target/linux/ramips/files/arch/mips/ralink/rt305x/devices.h
2013-03-31 23:21:42.982809471 +0200
@@ -23,6 +23,7 @@
void rt305x_register_flash(unsigned int id);
void rt305x_register_ethernet(void);
+void rt305x_register_i2c(void);
void rt305x_register_wifi(void);
void rt305x_register_wdt(void);
void rt305x_register_spi(struct spi_board_info *info, int n);
Index: a/target/linux/ramips/files/arch/mips/ralink/rt305x/mach-carambola.c
===================================================================
--- b/target/linux/ramips/files/arch/mips/ralink/rt305x/mach-carambola.c
2013-03-31 23:21:42.992809485 +0200
+++ a/target/linux/ramips/files/arch/mips/ralink/rt305x/mach-carambola.c
2013-03-31 23:21:42.982809471 +0200
@@ -36,6 +36,7 @@
rt305x_register_wifi();
rt305x_register_wdt();
rt305x_register_usb();
+ rt305x_register_i2c(); /* platform data for i2c-gpio */
}
MIPS_MACHINE(RAMIPS_MACH_CARAMBOLA, "CARAMBOLA", "8devices Carambola",
--
Tobias PGP: http://8ef7ddba.uguu.de
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