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| Started by | Eric Anholt <eric@anholt.net> |
|---|---|
| First post | 2015-09-11 00:30 +0200 |
| Last post | 2015-09-11 00:30 +0200 |
| Articles | 5 — 2 participants |
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BCM2835 auxiliary peripheral clocks. Eric Anholt <eric@anholt.net> - 2015-09-11 00:30 +0200
[PATCH 3/3] ARM: bcm2835: Add the auxiliary clocks to the device tree. Eric Anholt <eric@anholt.net> - 2015-09-11 00:30 +0200
Re: [PATCH 3/3] ARM: bcm2835: Add the auxiliary clocks to the device tree. Stephen Warren <swarren@wwwdotorg.org> - 2015-09-22 04:20 +0200
Re: [PATCH 3/3] ARM: bcm2835: Add the auxiliary clocks to the device tree. Stephen Warren <swarren@wwwdotorg.org> - 2015-09-22 04:20 +0200
[PATCH 1/3] clk: bcm2835: Add bindings for the auxiliary peripheral clock gates. Eric Anholt <eric@anholt.net> - 2015-09-11 00:30 +0200
| From | Eric Anholt <eric@anholt.net> |
|---|---|
| Date | 2015-09-11 00:30 +0200 |
| Subject | BCM2835 auxiliary peripheral clocks. |
| Message-ID | <q7ivU-6Gg-13@gated-at.bofh.it> |
This is a followup to the main audio domain clocks series I just posted. There's a clock gate register controlling the clocks for a few extra peripherals, and Martin Sperl has been working on the SPI driver for 2/3 of them (the other is a simple UART). This gives those drivers the clock gate enable they need to access their registers. The full series is available for testing at: https://github.com/anholt/linux/tree/bcm2385-clock-aux -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Eric Anholt <eric@anholt.net> |
|---|---|
| Date | 2015-09-11 00:30 +0200 |
| Subject | [PATCH 3/3] ARM: bcm2835: Add the auxiliary clocks to the device tree. |
| Message-ID | <q7ivV-6Gg-37@gated-at.bofh.it> |
| In reply to | #1222414 |
These will be used for enabling UART1, SPI1, and SPI2.
Signed-off-by: Eric Anholt <eric@anholt.net>
---
arch/arm/boot/dts/bcm2835.dtsi | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/arm/boot/dts/bcm2835.dtsi b/arch/arm/boot/dts/bcm2835.dtsi
index a6a55b7..7c37956 100644
--- a/arch/arm/boot/dts/bcm2835.dtsi
+++ b/arch/arm/boot/dts/bcm2835.dtsi
@@ -73,6 +73,13 @@
clocks = <&clk_osc>;
};
+ aux_clocks: aux-clocks@0x7e215004 {
+ compatible = "brcm,bcm2835-aux-clock";
+ #clock-cells = <1>;
+ reg = <0x7e215004 0x4>;
+ clocks = <&clocks BCM2835_CLOCK_VPU>;
+ };
+
rng@7e104000 {
compatible = "brcm,bcm2835-rng";
reg = <0x7e104000 0x10>;
--
2.1.4
--
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| From | Stephen Warren <swarren@wwwdotorg.org> |
|---|---|
| Date | 2015-09-22 04:20 +0200 |
| Subject | Re: [PATCH 3/3] ARM: bcm2835: Add the auxiliary clocks to the device tree. |
| Message-ID | <qbllv-8sA-1@gated-at.bofh.it> |
| In reply to | #1222418 |
On 09/10/2015 03:22 PM, Eric Anholt wrote:
> These will be used for enabling UART1, SPI1, and SPI2.
> diff --git a/arch/arm/boot/dts/bcm2835.dtsi b/arch/arm/boot/dts/bcm2835.dtsi
> + aux_clocks: aux-clocks@0x7e215004 {
> + compatible = "brcm,bcm2835-aux-clock";
> + #clock-cells = <1>;
> + reg = <0x7e215004 0x4>;
Actually, I take back the ack on this patch. This HW module has two
registers. The reg property should include both of those registers so
that if SW needs to start using the other register at some time in the
future, the entire set of registers is already represented in DT.
--
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| From | Stephen Warren <swarren@wwwdotorg.org> |
|---|---|
| Date | 2015-09-22 04:20 +0200 |
| Subject | Re: [PATCH 3/3] ARM: bcm2835: Add the auxiliary clocks to the device tree. |
| Message-ID | <qbllv-8sA-5@gated-at.bofh.it> |
| In reply to | #1222418 |
On 09/10/2015 03:22 PM, Eric Anholt wrote: > These will be used for enabling UART1, SPI1, and SPI2. Patches 1, 3, Acked-by: Stephen Warren <swarren@wwwdotorg.org> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Eric Anholt <eric@anholt.net> |
|---|---|
| Date | 2015-09-11 00:30 +0200 |
| Subject | [PATCH 1/3] clk: bcm2835: Add bindings for the auxiliary peripheral clock gates. |
| Message-ID | <q7ivV-6Gg-41@gated-at.bofh.it> |
| In reply to | #1222414 |
These will be used for enabling UART1, SPI1, and SPI2.
Signed-off-by: Eric Anholt <eric@anholt.net>
---
.../bindings/clock/brcm,bcm2835-aux-clock.txt | 30 ++++++++++++++++++++++
include/dt-bindings/clock/bcm2835-aux.h | 17 ++++++++++++
2 files changed, 47 insertions(+)
create mode 100644 Documentation/devicetree/bindings/clock/brcm,bcm2835-aux-clock.txt
create mode 100644 include/dt-bindings/clock/bcm2835-aux.h
diff --git a/Documentation/devicetree/bindings/clock/brcm,bcm2835-aux-clock.txt b/Documentation/devicetree/bindings/clock/brcm,bcm2835-aux-clock.txt
new file mode 100644
index 0000000..f5ce80a
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/brcm,bcm2835-aux-clock.txt
@@ -0,0 +1,30 @@
+Broadcom BCM2835 auxiliary peripheral clocks
+
+This binding uses the common clock binding:
+ Documentation/devicetree/bindings/clock/clock-bindings.txt
+
+This controls the clock gating for the BCM2835 auxiliary peripherals
+(UART, SPI1, and SPI2).
+
+Required properties:
+- compatible: Should be "brcm,bcm2835-aux-clock"
+- #clock-cells: Should be <1>. The permitted clock-specifier values can be
+ found in include/dt-bindings/clock/bcm2835-aux.h
+- reg: Specifies base physical address and size of the gate register
+- clocks: The parent clock phandle
+
+Example:
+
+ clocks: cprman@7e101000 {
+ compatible = "brcm,bcm2835-cprman";
+ #clock-cells = <1>;
+ reg = <0x7e101000 0x2000>;
+ clocks = <&clk_osc>;
+ };
+
+ aux_clocks: aux-clocks@0x7e215004 {
+ compatible = "brcm,bcm2835-aux-clock";
+ #clock-cells = <1>;
+ reg = <0x7e215004 0x4>;
+ clocks = <&clocks BCM2835_CLOCK_VPU>;
+ };
diff --git a/include/dt-bindings/clock/bcm2835-aux.h b/include/dt-bindings/clock/bcm2835-aux.h
new file mode 100644
index 0000000..d91156e
--- /dev/null
+++ b/include/dt-bindings/clock/bcm2835-aux.h
@@ -0,0 +1,17 @@
+/*
+ * Copyright (C) 2015 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#define BCM2835_AUX_CLOCK_UART 0
+#define BCM2835_AUX_CLOCK_SPI1 1
+#define BCM2835_AUX_CLOCK_SPI2 2
+#define BCM2835_AUX_CLOCK_COUNT 3
--
2.1.4
--
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