From: arnd@arndb•de (Arnd Bergmann)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 5/7] i2c: Add device tree support to i2c-pnx.c
Date: Mon, 2 Apr 2012 13:17:23 +0000 [thread overview]
Message-ID: <201204021317.23393.arnd@arndb.de> (raw)
In-Reply-To: <1333371364-21347-6-git-send-email-stigge@antcom.de>
On Monday 02 April 2012, Roland Stigge wrote:
> --- /dev/null
> +++ linux-2.6/Documentation/devicetree/bindings/i2c/pnx.txt
> @@ -0,0 +1,36 @@
> +* NXP PNX I2C Controller
> +
> +Required properties:
> +
> + - reg: Offset and length of the register set for the device
> + - compatible: should be "nxp,pnx-i2c"
> + - interrupts: <a b> where a is the interrupt number and b is a
> + field that represents an encoding of the sense and level
> + information for the interrupt
The encoding of the interrupt is specific to the controller and does
not belong here. Just write that there is one interrupt line to be
configure.
> + - interrupt-parent: the phandle for the interrupt controller that
> + services interrupts for this device.
interrupt-parent should be optional, it can be set in the (grand-)parent
device on systems where all devices use the same controller.
You should also require
#address-cells = <1>;
#size-cells = <0>;
To create an address space for i2c slave device numbers.
> +Examples:
> +
> + i2c1: i2c at 400A0000 {
> + compatible = "nxp,pnx-i2c";
> + reg = <0x400A0000 0x100>;
> + interrupt-parent = <&mic>;
> + interrupts = <51 0>;
> + };
> +
> + i2c2: i2c at 400A8000 {
> + compatible = "nxp,pnx-i2c";
> + reg = <0x400A8000 0x100>;
Best use all lowercase letters in the addresses.
> + interrupt-parent = <&mic>;
> + interrupts = <50 0>;
> + clock-frequency = <0x186a0>;
> + pnx,timeout = <0x64>;
> + slave-addr = <0x11>;
> + };
> static struct platform_driver i2c_pnx_driver = {
> .driver = {
> .name = "pnx-i2c",
> .owner = THIS_MODULE,
> +#ifdef CONFIG_OF
> + .of_match_table = i2c_pnx_of_match,
> +#endif
> },
> .probe = i2c_pnx_probe,
> .remove = __devexit_p(i2c_pnx_remove),
of_match_ptr() instead of this #ifdef, please.
Arnd
next prev parent reply other threads:[~2012-04-02 13:17 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-02 12:55 [PATCH 0/7]: arm: lpc32xx: Device tree support Roland Stigge
2012-04-02 12:55 ` [PATCH 1/7] iio: Add device tree support to LPC32xx ADC Roland Stigge
2012-04-02 12:55 ` [PATCH 2/7] rtc: Add device tree support for LPC32xx Roland Stigge
2012-04-02 12:56 ` [PATCH 3/7] net: Add device tree support to LPC32xx Roland Stigge
2012-04-02 12:56 ` [PATCH 4/7] arm: mach-pnx4008: Adjust i2c.c to updated i2c-pnx.c Roland Stigge
2012-04-02 13:07 ` Arnd Bergmann
2012-04-02 12:56 ` [PATCH 5/7] i2c: Add device tree support to i2c-pnx.c Roland Stigge
2012-04-02 13:17 ` Arnd Bergmann [this message]
2012-04-02 12:56 ` [PATCH 6/7] i2c-pnx.c: Fix suspend Roland Stigge
2012-04-02 12:56 ` [PATCH 7/7] wdt: Device tree support for pnx4008-wdt Roland Stigge
2012-04-02 13:45 ` [PATCH 0/7]: arm: lpc32xx: Device tree support Arnd Bergmann
2012-04-02 14:02 ` Roland Stigge
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