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ARM: Orion: Add arch support needed for I2C via DT. 

The MV64XXX I2C driver needs a clock in order to calculate the baud
rate factors. So add an clk to the clk tree. Also add the base DT
properties for kirkwood devices.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>

Conflicts:
	arch/arm/mach-kirkwood/common.c
hifive-unleashed-5.1
Andrew Lunn 2012-07-20 13:51:55 +02:00
parent 763721205e
commit e91cac0a77
4 changed files with 15 additions and 0 deletions
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10
arch/arm/boot/dts/kirkwood.dtsi
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@ -82,5 +82,15 @@
/* set partition map and/or chip-delay in board dts */
status = "disabled";
};
i2c@11000 {
compatible = "marvell,mv64xxx-i2c";
reg = <0x11000 0x20>;
#address-cells = <1>;
#size-cells = <0>;
interrupts = <29>;
clock-frequency = <100000>;
status = "disabled";
};
};
};

2
arch/arm/mach-kirkwood/board-dt.c
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@ -28,6 +28,8 @@ static struct of_device_id kirkwood_dt_match_table[] __initdata = {
struct of_dev_auxdata kirkwood_auxdata_lookup[] __initdata = {
OF_DEV_AUXDATA("marvell,orion-spi", 0xf1010600, "orion_spi.0", NULL),
OF_DEV_AUXDATA("marvell,mv64xxx-i2c", 0xf1011000, "mv64xxx_i2c.0",
NULL),
{},
};

2
arch/arm/mach-kirkwood/common.c
View File

@ -17,6 +17,7 @@
#include <linux/dma-mapping.h>
#include <linux/clk-provider.h>
#include <linux/spinlock.h>
#include <linux/mv643xx_i2c.h>
#include <net/dsa.h>
#include <asm/page.h>
#include <asm/timex.h>
@ -276,6 +277,7 @@ void __init kirkwood_clk_init(void)
orion_clkdev_add("0", "pcie", pex0);
orion_clkdev_add("1", "pcie", pex1);
orion_clkdev_add(NULL, "kirkwood-i2s", audio);
orion_clkdev_add(NULL, MV64XXX_I2C_CTLR_NAME ".0", runit);
/* Marvell says runit is used by SPI, UART, NAND, TWSI, ...,
* so should never be gated.

1
arch/arm/plat-orion/common.c
View File

@ -47,6 +47,7 @@ void __init orion_clkdev_init(struct clk *tclk)
orion_clkdev_add(NULL, MV643XX_ETH_NAME ".2", tclk);
orion_clkdev_add(NULL, MV643XX_ETH_NAME ".3", tclk);
orion_clkdev_add(NULL, "orion_wdt", tclk);
orion_clkdev_add(NULL, MV64XXX_I2C_CTLR_NAME ".0", tclk);
}
/* Fill in the resources structure and link it into the platform