diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.10/950-0578-overlays-spi-rtc-Add-ds3232-and-ds3234.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.10/950-0578-overlays-spi-rtc-Add-ds3232-and-ds3234.patch | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.10/950-0578-overlays-spi-rtc-Add-ds3232-and-ds3234.patch b/target/linux/bcm27xx/patches-5.10/950-0578-overlays-spi-rtc-Add-ds3232-and-ds3234.patch new file mode 100644 index 0000000000..3a2970abd6 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.10/950-0578-overlays-spi-rtc-Add-ds3232-and-ds3234.patch @@ -0,0 +1,125 @@ +From 8273b9e71c1f5c1f6f74faac21de64bf42686817 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.com> +Date: Mon, 19 Apr 2021 10:33:24 +0100 +Subject: [PATCH] overlays: spi-rtc: Add ds3232 and ds3234 + +Extend the spi-rtc overlay to support the ds3232 and ds3234 RTCs, as +well as adding parameters to select difference SPI controllers and +chip selects. + +N.B. The default CS is now active-low - use the "cs_high" parameter to +override this. + +Signed-off-by: Phil Elwell <phil@raspberrypi.com> +--- + arch/arm/boot/dts/overlays/README | 12 +++- + .../arm/boot/dts/overlays/spi-rtc-overlay.dts | 58 ++++++++++++++++--- + 2 files changed, 61 insertions(+), 9 deletions(-) + +--- a/arch/arm/boot/dts/overlays/README ++++ b/arch/arm/boot/dts/overlays/README +@@ -2689,7 +2689,17 @@ Params: <None> + Name: spi-rtc + Info: Adds support for a number of SPI Real Time Clock devices + Load: dtoverlay=spi-rtc,<param>=<val> +-Params: pcf2123 Select the PCF2123 device ++Params: ds3232 Select the DS3232 device ++ ds3234 Select the DS3234 device ++ pcf2123 Select the PCF2123 device ++ ++ spi0_0 Use spi0.0 (default) ++ spi0_1 Use spi0.1 ++ spi1_0 Use spi1.0 ++ spi1_1 Use spi1.1 ++ spi2_0 Use spi2.0 ++ spi2_1 Use spi2.1 ++ cs_high This device requires an active-high CS + + + Name: spi0-1cs +--- a/arch/arm/boot/dts/overlays/spi-rtc-overlay.dts ++++ b/arch/arm/boot/dts/overlays/spi-rtc-overlay.dts +@@ -1,3 +1,4 @@ ++// Definitions for several SPI-based Real Time Clocks + /dts-v1/; + /plugin/; + +@@ -5,29 +6,70 @@ + compatible = "brcm,bcm2835"; + + fragment@0 { +- target = <&spidev0>; ++ target = <&rtc>; + __dormant__ { +- status = "disabled"; ++ compatible = "maxim,ds3232"; + }; + }; + + fragment@1 { +- target = <&spi0>; ++ target = <&rtc>; ++ __dormant__ { ++ compatible = "maxim,ds3234"; ++ }; ++ }; ++ ++ fragment@2 { ++ target = <&rtc>; + __dormant__ { ++ compatible = "nxp,rtc-pcf2123"; ++ }; ++ }; ++ ++ spidev: fragment@100 { ++ target = <&spidev0>; ++ __overlay__ { ++ status = "disabled"; ++ }; ++ }; ++ ++ frag101: fragment@101 { ++ target = <&spi0>; ++ __overlay__ { + #address-cells = <1>; + #size-cells = <0>; + status = "okay"; + +- rtc-pcf2123@0 { +- compatible = "nxp,rtc-pcf2123"; +- spi-max-frequency = <5000000>; +- spi-cs-high = <1>; ++ rtc: rtc@0 { + reg = <0>; ++ spi-max-frequency = <5000000>; + }; + }; + }; + + __overrides__ { +- pcf2123 = <0>, "=0=1"; ++ spi0_0 = <&spidev>, "target:0=",<&spidev0>, ++ <&frag101>, "target:0=",<&spi0>, ++ <&rtc>, "reg:0=0"; ++ spi0_1 = <&spidev>, "target:0=",<&spidev1>, ++ <&frag101>, "target:0=",<&spi0>, ++ <&rtc>, "reg:0=1"; ++ spi1_0 = <0>,"-100", ++ <&frag101>, "target:0=",<&spi1>, ++ <&rtc>, "reg:0=0"; ++ spi1_1 = <0>,"-100", ++ <&frag101>, "target:0=",<&spi1>, ++ <&rtc>, "reg:0=1"; ++ spi2_0 = <0>,"-100", ++ <&frag101>, "target:0=",<&spi2>, ++ <&rtc>, "reg:0=0"; ++ spi2_1 = <0>,"-100", ++ <&frag101>, "target:0=",<&spi2>, ++ <&rtc>, "reg:0=1"; ++ cs_high = <&rtc>, "spi-cs-high?"; ++ ++ ds3232 = <0>,"+0"; ++ ds3234 = <0>,"+1"; ++ pcf2123 = <0>,"+2"; + }; + }; |