John Crispin wrote:
> Hi Tobias,
>
> i have been working on an update to ramips the last weeks, which
> bumps the kernel tot the upstream OF enabled one. This update will
> superseed your patch. we are currently not merging any patches based
> on the old code pattern.
Awesome. Device trees are a nice step forward from specific
mach-files I think. :)
> i will try to make an image for you to test using a devicetree with
> the i2c-gpio driver enabled and i2c-tools added if that is ok.
Sure, thanks.
Ideally you could add the INA2XX module, since that is what I have
hooked up on the bus.
> On 01/04/13 00:59, Tobias Diedrich wrote:
> >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",
> >
>
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>
--
Tobias PGP: http://8ef7ddba.uguu.de
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