mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

MIPS: JZ4780: CI20: DTS: add SPI controller config 

1. Add nodes for the two SPI controllers found in MIPS Creator CI20.
2. Reparent SPI clock source to effectively use MPLL and set its clock
   rate to 54MHz.

NOTE: To use the SPI controllers, `pinctrl-0` property must be set in
order to configure the used pins. As SPI functionality is multiplexed on
multiple pin groups, this choice is left to the user.

An example configuration:
```
 &spi0 {
         pinctrl-0 = <&pins_spi0>;
 }

 pins_spi0: spi0 {
         function = "ssi0";
         groups = "ssi0-dt-e", "ssi0-dr-e", "ssi0-clk-e",
                  "ssi0-ce0-e", "ssi0-ce1-e";
         bias-disable;
 };
```
Consult the CI20 pinout description for more details.

Signed-off-by: Artur Rojek <contact@artur-rojek.eu>
Link: https://lore.kernel.org/r/20210830230139.21476-4-contact@artur-rojek.eu
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Artur Rojek 2021-08-31 01:01:39 +02:00 committed by Mark Brown
parent ae5f94cc00
commit 7b3fd8109b
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 38 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
arch/mips/boot/dts/ingenic/ci20.dts
View File

@ -113,9 +113,12 @@
* Use the 32.768 kHz oscillator as the parent of the RTC for a higher
* precision.
*/
assigned-clocks = <&cgu JZ4780_CLK_OTGPHY>, <&cgu JZ4780_CLK_RTC>;
assigned-clock-parents = <0>, <&cgu JZ4780_CLK_RTCLK>;
assigned-clock-rates = <48000000>;
assigned-clocks = <&cgu JZ4780_CLK_OTGPHY>, <&cgu JZ4780_CLK_RTC>,
<&cgu JZ4780_CLK_SSIPLL>, <&cgu JZ4780_CLK_SSI>;
assigned-clock-parents = <0>, <&cgu JZ4780_CLK_RTCLK>,
<&cgu JZ4780_CLK_MPLL>,
<&cgu JZ4780_CLK_SSIPLL>;
assigned-clock-rates = <48000000>, <0>, <54000000>;
};
&tcu {

44
arch/mips/boot/dts/ingenic/jz4780.dtsi
View File

@ -255,22 +255,23 @@
};
};
spi_gpio {
compatible = "spi-gpio";
spi0: spi@10043000 {
compatible = "ingenic,jz4780-spi";
reg = <0x10043000 0x1c>;
#address-cells = <1>;
#size-cells = <0>;
num-chipselects = <2>;
gpio-miso = <&gpe 14 0>;
gpio-sck = <&gpe 15 0>;
gpio-mosi = <&gpe 17 0>;
cs-gpios = <&gpe 16 0>, <&gpe 18 0>;
interrupt-parent = <&intc>;
interrupts = <8>;
spidev@0 {
compatible = "spidev";
reg = <0>;
spi-max-frequency = <1000000>;
};
clocks = <&cgu JZ4780_CLK_SSI0>;
clock-names = "spi";
dmas = <&dma JZ4780_DMA_SSI0_RX 0xffffffff>,
<&dma JZ4780_DMA_SSI0_TX 0xffffffff>;
dma-names = "rx", "tx";
status = "disabled";
};
uart0: serial@10030000 {
@ -338,6 +339,25 @@
status = "disabled";
};
spi1: spi@10044000 {
compatible = "ingenic,jz4780-spi";
reg = <0x10044000 0x1c>;
#address-cells = <1>;
#size-sells = <0>;
interrupt-parent = <&intc>;
interrupts = <7>;
clocks = <&cgu JZ4780_CLK_SSI1>;
clock-names = "spi";
dmas = <&dma JZ4780_DMA_SSI1_RX 0xffffffff>,
<&dma JZ4780_DMA_SSI1_TX 0xffffffff>;
dma-names = "rx", "tx";
status = "disabled";
};
i2c0: i2c@10050000 {
compatible = "ingenic,jz4780-i2c", "ingenic,jz4770-i2c";
#address-cells = <1>;