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82ac6d206e
I2STDM acts as SLAVE mode, It requires two GPIO pins
to control DSP-FSXN (rk2118) to output LRCK_TX/RX.
e.g.
&i2s1 {
fsxn-rx-gpio = <&gpio2 RK_PB4 GPIO_ACTIVE_HIGH>;
fsxn-tx-gpio = <&gpio4 RK_PA0 GPIO_ACTIVE_HIGH>;
pinctrl-names = "default";
pinctrl-0 = <&i2s1m0_lrck
&i2s1m0_sclk
&i2s1m0_sdi0
&i2s1m0_sdi1
&i2s1m0_sdo0
&i2s1m0_sdo1
&i2s1m0_sdo2
&gpio_fsxn_pins>;
};
&pinctrl {
fsxn {
/omit-if-no-ref/
gpio_fsxn_pins: gpio-fsxn-pins {
rockchip,pins =
<2 RK_PB4 RK_FUNC_GPIO &pcfg_pull_none>,
<4 RK_PA0 RK_FUNC_GPIO &pcfg_pull_none>;
};
};
};
Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Change-Id: I1b4d16b51dac4f9ab728fa0889003fc46cd608d3
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.