From: Rob Herring <robh+dt@kernel.org>
To: Leonard Crestez <leonard.crestez@nxp.com>
Cc: "Stephen Boyd" <sboyd@kernel.org>,
"MyungJoo Ham" <myungjoo.ham@samsung.com>,
"Kyungmin Park" <kyungmin.park@samsung.com>,
"Shawn Guo" <shawnguo@kernel.org>,
"Michael Turquette" <mturquette@baylibre.com>,
"Chanwoo Choi" <cw00.choi@samsung.com>,
"Artur Świgoń" <a.swigon@partner.samsung.com>,
"Saravana Kannan" <saravanak@google.com>,
"Krzysztof Kozlowski" <krzk@kernel.org>,
"Alexandre Bailon" <abailon@baylibre.com>,
"Georgi Djakov" <georgi.djakov@linaro.org>,
"Dong Aisheng" <aisheng.dong@nxp.com>,
"Abel Vesa" <abel.vesa@nxp.com>, "Jacky Bai" <ping.bai@nxp.com>,
"Anson Huang" <Anson.Huang@nxp.com>,
"Fabio Estevam" <fabio.estevam@nxp.com>,
"Viresh Kumar" <viresh.kumar@linaro.org>,
"Will Deacon" <will@kernel.org>,
"Mark Rutland" <mark.rutland@arm.com>,
devicetree@vger.kernel.org,
"open list:THERMAL" <linux-pm@vger.kernel.org>,
"NXP Linux Team" <linux-imx@nxp.com>,
"Sascha Hauer" <kernel@pengutronix.de>,
"moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH 4/7] dt-bindings: devfreq: Add bindings for imx ddr controller
Date: Mon, 12 Aug 2019 13:51:57 -0600 [thread overview]
Message-ID: <CAL_Jsq+5zp1nW=sNtU_+wdUO9KJ4ABWjdX=R9DHjBsgygTxV6g@mail.gmail.com> (raw)
In-Reply-To: <4cbddd75652c63aab19866c93faa0b784b56d53f.1565633880.git.leonard.crestez@nxp.com>
On Mon, Aug 12, 2019 at 12:50 PM Leonard Crestez
<leonard.crestez@nxp.com> wrote:
>
> Add devicetree bindings for the i.MX DDR Controller on imx8m series
> chips. It supports dynamic frequency switching between multiple data
> rates and this is exposed to Linux via the devfreq subsystem.
>
> Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
> ---
> .../devicetree/bindings/devfreq/imx-ddrc.yaml | 53 +++++++++++++++++++
> 1 file changed, 53 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/devfreq/imx-ddrc.yaml
>
> diff --git a/Documentation/devicetree/bindings/devfreq/imx-ddrc.yaml b/Documentation/devicetree/bindings/devfreq/imx-ddrc.yaml
> new file mode 100644
> index 000000000000..fa20280a682f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/devfreq/imx-ddrc.yaml
> @@ -0,0 +1,53 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/devfreq/imx.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: i.MX DDR Controller
> +
> +maintainers:
> + - Leonard Crestez <leonard.crestez@nxp.com>
> +
> +properties:
> + compatible:
> + contains:
Don't use 'contains'.
> + enum:
> + - fsl,imx8m-ddrc
> +
> + reg:
> + maxItems: 1
> + description: DDR Controller registers
Don't really need a description for a standard property with a single item.
> +
> + clocks:
> + minItems: 5
Just maxItems is sufficient unless there's a variable number of items.
> + maxItems: 5
> +
> + clock-names:
> + items:
> + - const: dram_core
> + - const: dram_pll
> + - const: dram_alt_root
> + - const: dram_alt
> + - const: dram_apb
> +
> +required:
> + - reg
> + - compatible
> + - clocks
> + - clock-names
You should add an 'additionalProperties: false' here.
> +
> +examples:
> + - |
> + #include <dt-bindings/clock/imx8mm-clock.h>
> + ddrc: dram-controller@3d400000 {
> + compatible = "fsl,imx8mm-ddrc", "fsl,imx8m-ddrc";
> + reg = <0x3d400000 0x400000>;
> + clock-names = "dram_core", "dram_pll", "dram_alt_root", "dram_alt", "dram_apb";
> + clocks = <&clk IMX8MM_CLK_DRAM_CORE>,
> + <&clk IMX8MM_DRAM_PLL>,
> + <&clk IMX8MM_CLK_DRAM_ALT_ROOT>,
> + <&clk IMX8MM_CLK_DRAM_ALT>,
> + <&clk IMX8MM_CLK_DRAM_APB>;
> + operating-points-v2 = <&ddrc_opp_table>;
Not documented. You can assume a common property has a type definition
already (this one doesn't yet), so just this is enough:
operating-points-v2: true
next prev parent reply other threads:[~2019-08-12 19:52 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-12 18:49 [PATCH 0/7] PM / devfreq: Add initial imx support Leonard Crestez
2019-08-12 18:49 ` [PATCH 1/7] clk: imx8m: Set CLK_GET_RATE_NOCACHE on dram_alt/apb Leonard Crestez
2019-08-12 18:49 ` [PATCH 2/7] dt-bindings: devfreq: Add bindings for generic imx buses Leonard Crestez
2019-08-12 19:46 ` Rob Herring
2019-08-13 1:32 ` Leonard Crestez
2019-08-13 14:06 ` Rob Herring
2019-08-13 14:59 ` Leonard Crestez
2019-08-12 18:49 ` [PATCH 3/7] PM / devfreq: Add generic imx bus driver Leonard Crestez
2019-08-12 18:49 ` [PATCH 4/7] dt-bindings: devfreq: Add bindings for imx ddr controller Leonard Crestez
2019-08-12 19:51 ` Rob Herring [this message]
2019-08-12 18:49 ` [PATCH 5/7] PM / devfreq: Add dynamic scaling " Leonard Crestez
2019-08-12 18:49 ` [PATCH 6/7] PM / devfreq: imx-ddrc: Measure bandwidth with perf Leonard Crestez
2019-08-12 18:49 ` [PATCH 7/7] arm64: dts: imx8mm: Add devfreq nodes Leonard Crestez
[not found] ` <CGME20190812185002epcas1p1c528b12d20771cf4887907fdfd716e22@epcms1p2>
2019-08-13 2:25 ` [PATCH 2/7] dt-bindings: devfreq: Add bindings for generic imx buses MyungJoo Ham
[not found] ` <CGME20190812185005epcas3p10a9a3dbb90489534222e093c63f27900@epcms1p3>
2019-08-13 2:33 ` [PATCH 3/7] PM / devfreq: Add generic imx bus driver MyungJoo Ham
2019-08-13 3:02 ` Leonard Crestez
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