mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-27 17:18:59 +00:00
96 lines
3.0 KiB
Diff
96 lines
3.0 KiB
Diff
|
From c286380fe677e404af0a1226c6589b3f24fafc6c Mon Sep 17 00:00:00 2001
|
||
|
|
From: Phil Elwell <phil@raspberrypi.org>
|
||
|
|
Date: Tue, 20 Feb 2018 17:32:02 +0000
|
||
|
|
Subject: [PATCH 227/454] overlays: Add sc16is752-i2c overlay
|
||
|
|
|
||
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
|
||
|
|
---
|
||
|
|
arch/arm/boot/dts/overlays/Makefile | 1 +
|
||
|
|
arch/arm/boot/dts/overlays/README | 15 +++++--
|
||
|
|
.../dts/overlays/sc16is752-i2c-overlay.dts | 40 +++++++++++++++++++
|
||
|
|
3 files changed, 53 insertions(+), 3 deletions(-)
|
||
|
|
create mode 100644 arch/arm/boot/dts/overlays/sc16is752-i2c-overlay.dts
|
||
|
|
|
||
|
|
--- a/arch/arm/boot/dts/overlays/Makefile
|
||
|
|
+++ b/arch/arm/boot/dts/overlays/Makefile
|
||
|
|
@@ -100,6 +100,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
|
||
|
|
rpi-tv.dtbo \
|
||
|
|
rra-digidac1-wm8741-audio.dtbo \
|
||
|
|
sc16is750-i2c.dtbo \
|
||
|
|
+ sc16is752-i2c.dtbo \
|
||
|
|
sc16is752-spi1.dtbo \
|
||
|
|
sdhost.dtbo \
|
||
|
|
sdio.dtbo \
|
||
|
|
--- a/arch/arm/boot/dts/overlays/README
|
||
|
|
+++ b/arch/arm/boot/dts/overlays/README
|
||
|
|
@@ -1447,14 +1447,23 @@ Params: <None>
|
||
|
|
|
||
|
|
Name: sc16is750-i2c
|
||
|
|
Info: Overlay for the NXP SC16IS750 UART with I2C Interface
|
||
|
|
- Enables the chip on I2C1 at 0x48. To select another address,
|
||
|
|
- please refer to table 10 in reference manual.
|
||
|
|
-
|
||
|
|
+ Enables the chip on I2C1 at 0x48 (or the "addr" parameter value). To
|
||
|
|
+ select another address, please refer to table 10 in reference manual.
|
||
|
|
Load: dtoverlay=sc16is750-i2c,<param>=<val>
|
||
|
|
Params: int_pin GPIO used for IRQ (default 24)
|
||
|
|
addr Address (default 0x48)
|
||
|
|
|
||
|
|
|
||
|
|
+Name: sc16is752-i2c
|
||
|
|
+Info: Overlay for the NXP SC16IS752 dual UART with I2C Interface
|
||
|
|
+ Enables the chip on I2C1 at 0x48 (or the "addr" parameter value). To
|
||
|
|
+ select another address, please refer to table 10 in reference manual.
|
||
|
|
+Load: dtoverlay=sc16is752-i2c,<param>=<val>
|
||
|
|
+Params: int_pin GPIO used for IRQ (default 24)
|
||
|
|
+ addr Address (default 0x48)
|
||
|
|
+ xtal On-board crystal frequency (default 14745600)
|
||
|
|
+
|
||
|
|
+
|
||
|
|
Name: sc16is752-spi1
|
||
|
|
Info: Overlay for the NXP SC16IS752 Dual UART with SPI Interface
|
||
|
|
Enables the chip on SPI1.
|
||
|
|
--- /dev/null
|
||
|
|
+++ b/arch/arm/boot/dts/overlays/sc16is752-i2c-overlay.dts
|
||
|
|
@@ -0,0 +1,40 @@
|
||
|
|
+/dts-v1/;
|
||
|
|
+/plugin/;
|
||
|
|
+
|
||
|
|
+/ {
|
||
|
|
+ compatible = "brcm,bcm2835";
|
||
|
|
+
|
||
|
|
+ fragment@0 {
|
||
|
|
+ target = <&i2c1>;
|
||
|
|
+
|
||
|
|
+ frag1: __overlay__ {
|
||
|
|
+ #address-cells = <1>;
|
||
|
|
+ #size-cells = <0>;
|
||
|
|
+ status = "okay";
|
||
|
|
+
|
||
|
|
+ sc16is752: sc16is752@48 {
|
||
|
|
+ compatible = "nxp,sc16is752";
|
||
|
|
+ reg = <0x48>; // i2c address
|
||
|
|
+ clocks = <&sc16is752_clk>;
|
||
|
|
+ interrupt-parent = <&gpio>;
|
||
|
|
+ interrupts = <24 0x2>; /* IRQ_TYPE_EDGE_FALLING */
|
||
|
|
+ gpio-controller;
|
||
|
|
+ #gpio-cells = <0>;
|
||
|
|
+ i2c-max-frequency = <400000>;
|
||
|
|
+ status = "okay";
|
||
|
|
+
|
||
|
|
+ sc16is752_clk: sc16is752_clk {
|
||
|
|
+ compatible = "fixed-clock";
|
||
|
|
+ #clock-cells = <0>;
|
||
|
|
+ clock-frequency = <14745600>;
|
||
|
|
+ };
|
||
|
|
+ };
|
||
|
|
+ };
|
||
|
|
+ };
|
||
|
|
+
|
||
|
|
+ __overrides__ {
|
||
|
|
+ int_pin = <&sc16is752>,"interrupts:0";
|
||
|
|
+ addr = <&sc16is752>,"reg:0";
|
||
|
|
+ xtal = <&sc16is752>,"clock-frequency:0";
|
||
|
|
+ };
|
||
|
|
+};
|