tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1* Freescale Low Power SPI (LPSPI) for i.MX
2
3Required properties:
4- compatible :
5 - "fsl,imx7ulp-spi" for LPSPI compatible with the one integrated on i.MX7ULP soc
6 - "fsl,imx8qxp-spi" for LPSPI compatible with the one integrated on i.MX8QXP soc
7- reg : address and length of the lpspi master registers
8- interrupt-parent : core interrupt controller
9- interrupts : lpspi interrupt
10- clocks : lpspi clock specifier. Its number and order need to correspond to the
11 value in clock-names.
12- clock-names : Corresponding to per clock and ipg clock in "clocks"
13 respectively. In i.MX7ULP, it only has per clk, so use CLK_DUMMY
14 to fill the "ipg" blank.
15- spi-slave : spi slave mode support. In slave mode, add this attribute without
16 value. In master mode, remove it.
17
18Examples:
19
20lpspi2: lpspi@40290000 {
21 compatible = "fsl,imx7ulp-spi";
22 reg = <0x40290000 0x10000>;
23 interrupt-parent = <&intc>;
24 interrupts = <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>;
25 clocks = <&clks IMX7ULP_CLK_LPSPI2>,
26 <&clks IMX7ULP_CLK_DUMMY>;
27 clock-names = "per", "ipg";
28 spi-slave;
29};