* [PATCH 1/5 v3] dt-bindings: clock: u8500: Add clkout clock bindings
[not found] <20220414221751.323525-1-linus.walleij@linaro.org>
@ 2022-04-14 22:17 ` Linus Walleij
2022-04-19 16:34 ` Rob Herring
2022-04-25 23:45 ` Stephen Boyd
0 siblings, 2 replies; 3+ messages in thread
From: Linus Walleij @ 2022-04-14 22:17 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd
Cc: linux-clk, Linus Walleij, devicetree, Ulf Hansson
This adds device tree bindings for the externally routed clocks
CLKOUT1 and CLKOUT2 clocks found in the DB8500.
Cc: devicetree@vger.kernel.org
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v2->v3:
- Pick up Ulf's ACK.
ChangeLog v1->v2:
- Push the description of the clock-cells down under the clock-cells
subnode.
- Add an example, as this was missing and requested.
---
.../bindings/clock/stericsson,u8500-clks.yaml | 57 +++++++++++++++++++
include/dt-bindings/clock/ste-db8500-clkout.h | 17 ++++++
2 files changed, 74 insertions(+)
create mode 100644 include/dt-bindings/clock/ste-db8500-clkout.h
diff --git a/Documentation/devicetree/bindings/clock/stericsson,u8500-clks.yaml b/Documentation/devicetree/bindings/clock/stericsson,u8500-clks.yaml
index 9bc95a308477..2150307219a0 100644
--- a/Documentation/devicetree/bindings/clock/stericsson,u8500-clks.yaml
+++ b/Documentation/devicetree/bindings/clock/stericsson,u8500-clks.yaml
@@ -109,6 +109,25 @@ properties:
additionalProperties: false
+ clkout-clock:
+ description: A subnode with three clock cells for externally routed clocks,
+ output clocks. These are two PRCMU-internal clocks that can be divided and
+ muxed out on the pads of the DB8500 SoC.
+ type: object
+
+ properties:
+ '#clock-cells':
+ description:
+ The first cell indicates which output clock we are using,
+ possible values are 0 (CLKOUT1) and 1 (CLKOUT2).
+ The second cell indicates which clock we want to use as source,
+ possible values are 0 thru 7, see the defines for the different
+ source clocks.
+ The third cell is a divider, legal values are 1 thru 63.
+ const: 3
+
+ additionalProperties: false
+
required:
- compatible
- reg
@@ -119,3 +138,41 @@ required:
- smp-twd-clock
additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/ste-db8500-clkout.h>
+ clocks@8012 {
+ compatible = "stericsson,u8500-clks";
+ reg = <0x8012f000 0x1000>, <0x8011f000 0x1000>,
+ <0x8000f000 0x1000>, <0xa03ff000 0x1000>,
+ <0xa03cf000 0x1000>;
+
+ prcmu_clk: prcmu-clock {
+ #clock-cells = <1>;
+ };
+
+ prcc_pclk: prcc-periph-clock {
+ #clock-cells = <2>;
+ };
+
+ prcc_kclk: prcc-kernel-clock {
+ #clock-cells = <2>;
+ };
+
+ prcc_reset: prcc-reset-controller {
+ #reset-cells = <2>;
+ };
+
+ rtc_clk: rtc32k-clock {
+ #clock-cells = <0>;
+ };
+
+ smp_twd_clk: smp-twd-clock {
+ #clock-cells = <0>;
+ };
+
+ clkout_clk: clkout-clock {
+ #clock-cells = <3>;
+ };
+ };
diff --git a/include/dt-bindings/clock/ste-db8500-clkout.h b/include/dt-bindings/clock/ste-db8500-clkout.h
new file mode 100644
index 000000000000..ca07cb2bd1bc
--- /dev/null
+++ b/include/dt-bindings/clock/ste-db8500-clkout.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __STE_CLK_DB8500_CLKOUT_H__
+#define __STE_CLK_DB8500_CLKOUT_H__
+
+#define DB8500_CLKOUT_1 0
+#define DB8500_CLKOUT_2 1
+
+#define DB8500_CLKOUT_SRC_CLK38M 0
+#define DB8500_CLKOUT_SRC_ACLK 1
+#define DB8500_CLKOUT_SRC_SYSCLK 2
+#define DB8500_CLKOUT_SRC_LCDCLK 3
+#define DB8500_CLKOUT_SRC_SDMMCCLK 4
+#define DB8500_CLKOUT_SRC_TVCLK 5
+#define DB8500_CLKOUT_SRC_TIMCLK 6
+#define DB8500_CLKOUT_SRC_CLK009 7
+
+#endif
--
2.35.1
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