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