[v9,3/4] clk: meson: add DT documentation for emmc clock controller
diff mbox series

Message ID 1546955444-7549-4-git-send-email-jianxin.pan@amlogic.com
State New
Headers show
Series
  • clk: meson: add a sub EMMC clock controller support
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Commit Message

Jianxin Pan Jan. 8, 2019, 1:50 p.m. UTC
From: Yixun Lan <yixun.lan@amlogic.com>

Document the MMC sub clock controller driver, the potential consumer
of this driver is MMC or NAND. Also add four clock bindings IDs which
provided by this driver.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Yixun Lan <yixun.lan@amlogic.com>
Signed-off-by: Jianxin Pan <jianxin.pan@amlogic.com>
---
 .../devicetree/bindings/clock/amlogic,mmc-clkc.txt | 39 ++++++++++++++++++++++
 include/dt-bindings/clock/amlogic,mmc-clkc.h       | 17 ++++++++++
 2 files changed, 56 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/amlogic,mmc-clkc.txt
 create mode 100644 include/dt-bindings/clock/amlogic,mmc-clkc.h

Comments

Jerome Brunet Jan. 22, 2019, 9:27 a.m. UTC | #1
On Tue, 2019-01-08 at 21:50 +0800, Jianxin Pan wrote:
> From: Yixun Lan <yixun.lan@amlogic.com>
> 
> Document the MMC sub clock controller driver, the potential consumer
> of this driver is MMC or NAND. Also add four clock bindings IDs which
> provided by this driver.
> 
> Reviewed-by: Rob Herring <robh@kernel.org>
> Signed-off-by: Yixun Lan <yixun.lan@amlogic.com>
> Signed-off-by: Jianxin Pan <jianxin.pan@amlogic.com>
> ---
>  .../devicetree/bindings/clock/amlogic,mmc-clkc.txt | 39
> ++++++++++++++++++++++
>  include/dt-bindings/clock/amlogic,mmc-clkc.h       | 17 ++++++++++
>  2 files changed, 56 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/clock/amlogic,mmc-
> clkc.txt
>  create mode 100644 include/dt-bindings/clock/amlogic,mmc-clkc.h
> 
> diff --git a/Documentation/devicetree/bindings/clock/amlogic,mmc-clkc.txt
> b/Documentation/devicetree/bindings/clock/amlogic,mmc-clkc.txt
> new file mode 100644
> index 0000000..0f518e6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/amlogic,mmc-clkc.txt
> @@ -0,0 +1,39 @@
> +* Amlogic MMC Sub Clock Controller Driver
> +
> +The Amlogic MMC clock controller generates and supplies clock to support
> +MMC and NAND controller
> +
> +Required Properties:
> +
> +- compatible: should be:
> +		"amlogic,gx-mmc-clkc"
> +		"amlogic,axg-mmc-clkc"

nitpick, missing is something to tell that only one is required, not both
for example `should be one of the following`

> +
> +- #clock-cells: should be 1.
> +- clocks: phandles to clocks corresponding to the clock-names property
> +- clock-names: list of parent clock names
> +	- "clkin0", "clkin1"
> +
> +- reg: address of emmc sub clock register
> +
> +Example: Clock controller node:
> +
> +sd_mmc_c_clkc: clock-controller@7000 {
> +	compatible = "amlogic,axg-mmc-clkc", "syscon";
> +	reg = <0x0 0x7000 0x0 0x4>;
> +	#clock-cells = <1>;
> +
> +	clock-names = "clkin0", "clkin1";
> +	clocks = <&clkc CLKID_SD_MMC_C_CLK0>,
> +		 <&clkc CLKID_FCLK_DIV2>;
> +};
> +
> +sd_emmc_b_clkc: clock-controller@5000 {
> +	compatible = "amlogic,axg-mmc-clkc", "syscon";
> +	reg = <0x0 0x5000 0x0 0x4>;
> +
> +	#clock-cells = <1>;
> +	clock-names = "clkin0", "clkin1";
> +	clocks = <&clkc CLKID_SD_EMMC_B_CLK0>,
> +		 <&clkc CLKID_FCLK_DIV2>;
> +};
> diff --git a/include/dt-bindings/clock/amlogic,mmc-clkc.h b/include/dt-
> bindings/clock/amlogic,mmc-clkc.h
> new file mode 100644
> index 0000000..34a3c56
> --- /dev/null
> +++ b/include/dt-bindings/clock/amlogic,mmc-clkc.h
> @@ -0,0 +1,17 @@
> +/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
> +/*
> + * Meson MMC sub clock tree IDs
> + *
> + * Copyright (c) 2018 Amlogic, Inc. All rights reserved.
> + * Author: Yixun Lan <yixun.lan@amlogic.com>
> + */
> +
> +#ifndef __MMC_CLKC_H
> +#define __MMC_CLKC_H
> +
> +#define CLKID_MMC_DIV		0
> +#define CLKID_MMC_PHASE_CORE	1
> +#define CLKID_MMC_PHASE_TX	2
> +#define CLKID_MMC_PHASE_RX	3
> +
> +#endif

Patch
diff mbox series

diff --git a/Documentation/devicetree/bindings/clock/amlogic,mmc-clkc.txt b/Documentation/devicetree/bindings/clock/amlogic,mmc-clkc.txt
new file mode 100644
index 0000000..0f518e6
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/amlogic,mmc-clkc.txt
@@ -0,0 +1,39 @@ 
+* Amlogic MMC Sub Clock Controller Driver
+
+The Amlogic MMC clock controller generates and supplies clock to support
+MMC and NAND controller
+
+Required Properties:
+
+- compatible: should be:
+		"amlogic,gx-mmc-clkc"
+		"amlogic,axg-mmc-clkc"
+
+- #clock-cells: should be 1.
+- clocks: phandles to clocks corresponding to the clock-names property
+- clock-names: list of parent clock names
+	- "clkin0", "clkin1"
+
+- reg: address of emmc sub clock register
+
+Example: Clock controller node:
+
+sd_mmc_c_clkc: clock-controller@7000 {
+	compatible = "amlogic,axg-mmc-clkc", "syscon";
+	reg = <0x0 0x7000 0x0 0x4>;
+	#clock-cells = <1>;
+
+	clock-names = "clkin0", "clkin1";
+	clocks = <&clkc CLKID_SD_MMC_C_CLK0>,
+		 <&clkc CLKID_FCLK_DIV2>;
+};
+
+sd_emmc_b_clkc: clock-controller@5000 {
+	compatible = "amlogic,axg-mmc-clkc", "syscon";
+	reg = <0x0 0x5000 0x0 0x4>;
+
+	#clock-cells = <1>;
+	clock-names = "clkin0", "clkin1";
+	clocks = <&clkc CLKID_SD_EMMC_B_CLK0>,
+		 <&clkc CLKID_FCLK_DIV2>;
+};
diff --git a/include/dt-bindings/clock/amlogic,mmc-clkc.h b/include/dt-bindings/clock/amlogic,mmc-clkc.h
new file mode 100644
index 0000000..34a3c56
--- /dev/null
+++ b/include/dt-bindings/clock/amlogic,mmc-clkc.h
@@ -0,0 +1,17 @@ 
+/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
+/*
+ * Meson MMC sub clock tree IDs
+ *
+ * Copyright (c) 2018 Amlogic, Inc. All rights reserved.
+ * Author: Yixun Lan <yixun.lan@amlogic.com>
+ */
+
+#ifndef __MMC_CLKC_H
+#define __MMC_CLKC_H
+
+#define CLKID_MMC_DIV		0
+#define CLKID_MMC_PHASE_CORE	1
+#define CLKID_MMC_PHASE_TX	2
+#define CLKID_MMC_PHASE_RX	3
+
+#endif