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8299d1f057
Rebased RPi foundation patches on linux 5.10.59, removed applied and reverted patches, wireless patches and defconfig patches. bcm2708: boot tested on RPi B+ v1.2 bcm2709: boot tested on RPi 4B v1.1 4G bcm2711: boot tested on RPi 4B v1.1 4G Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
126 lines
3.3 KiB
Diff
126 lines
3.3 KiB
Diff
From 8273b9e71c1f5c1f6f74faac21de64bf42686817 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Mon, 19 Apr 2021 10:33:24 +0100
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Subject: [PATCH] overlays: spi-rtc: Add ds3232 and ds3234
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Extend the spi-rtc overlay to support the ds3232 and ds3234 RTCs, as
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well as adding parameters to select difference SPI controllers and
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chip selects.
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N.B. The default CS is now active-low - use the "cs_high" parameter to
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override this.
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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arch/arm/boot/dts/overlays/README | 12 +++-
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.../arm/boot/dts/overlays/spi-rtc-overlay.dts | 58 ++++++++++++++++---
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2 files changed, 61 insertions(+), 9 deletions(-)
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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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@@ -2689,7 +2689,17 @@ Params: <None>
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Name: spi-rtc
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Info: Adds support for a number of SPI Real Time Clock devices
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Load: dtoverlay=spi-rtc,<param>=<val>
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-Params: pcf2123 Select the PCF2123 device
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+Params: ds3232 Select the DS3232 device
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+ ds3234 Select the DS3234 device
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+ pcf2123 Select the PCF2123 device
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+
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+ spi0_0 Use spi0.0 (default)
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+ spi0_1 Use spi0.1
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+ spi1_0 Use spi1.0
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+ spi1_1 Use spi1.1
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+ spi2_0 Use spi2.0
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+ spi2_1 Use spi2.1
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+ cs_high This device requires an active-high CS
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Name: spi0-1cs
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--- a/arch/arm/boot/dts/overlays/spi-rtc-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/spi-rtc-overlay.dts
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@@ -1,3 +1,4 @@
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+// Definitions for several SPI-based Real Time Clocks
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/dts-v1/;
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/plugin/;
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@@ -5,29 +6,70 @@
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compatible = "brcm,bcm2835";
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fragment@0 {
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- target = <&spidev0>;
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+ target = <&rtc>;
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__dormant__ {
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- status = "disabled";
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+ compatible = "maxim,ds3232";
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};
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};
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fragment@1 {
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- target = <&spi0>;
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+ target = <&rtc>;
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+ __dormant__ {
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+ compatible = "maxim,ds3234";
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+ };
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+ };
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+
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+ fragment@2 {
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+ target = <&rtc>;
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__dormant__ {
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+ compatible = "nxp,rtc-pcf2123";
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+ };
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+ };
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+
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+ spidev: fragment@100 {
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+ target = <&spidev0>;
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+ __overlay__ {
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+ status = "disabled";
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+ };
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+ };
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+
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+ frag101: fragment@101 {
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+ target = <&spi0>;
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+ __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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- rtc-pcf2123@0 {
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- compatible = "nxp,rtc-pcf2123";
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- spi-max-frequency = <5000000>;
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- spi-cs-high = <1>;
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+ rtc: rtc@0 {
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reg = <0>;
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+ spi-max-frequency = <5000000>;
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};
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};
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};
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__overrides__ {
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- pcf2123 = <0>, "=0=1";
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+ spi0_0 = <&spidev>, "target:0=",<&spidev0>,
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+ <&frag101>, "target:0=",<&spi0>,
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+ <&rtc>, "reg:0=0";
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+ spi0_1 = <&spidev>, "target:0=",<&spidev1>,
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+ <&frag101>, "target:0=",<&spi0>,
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+ <&rtc>, "reg:0=1";
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+ spi1_0 = <0>,"-100",
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+ <&frag101>, "target:0=",<&spi1>,
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+ <&rtc>, "reg:0=0";
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+ spi1_1 = <0>,"-100",
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+ <&frag101>, "target:0=",<&spi1>,
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+ <&rtc>, "reg:0=1";
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+ spi2_0 = <0>,"-100",
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+ <&frag101>, "target:0=",<&spi2>,
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+ <&rtc>, "reg:0=0";
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+ spi2_1 = <0>,"-100",
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+ <&frag101>, "target:0=",<&spi2>,
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+ <&rtc>, "reg:0=1";
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+ cs_high = <&rtc>, "spi-cs-high?";
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+
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+ ds3232 = <0>,"+0";
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+ ds3234 = <0>,"+1";
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+ pcf2123 = <0>,"+2";
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};
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};
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