From mboxrd@z Thu Jan 1 00:00:00 1970 From: ttynkkynen@nvidia.com (Tuomas Tynkkynen) Date: Fri, 11 Jul 2014 00:42:47 +0300 Subject: [PATCH 11/13] cpufreq: tegra124: Add device tree bindings In-Reply-To: <1405028569-14253-1-git-send-email-ttynkkynen@nvidia.com> References: <1405028569-14253-1-git-send-email-ttynkkynen@nvidia.com> Message-ID: <1405028569-14253-12-git-send-email-ttynkkynen@nvidia.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org The cpufreq driver for Tegra124 will be a different one than the old Tegra20 cpufreq driver (tegra-cpufreq), which does not use the device tree. Signed-off-by: Tuomas Tynkkynen --- .../bindings/cpufreq/tegra124-cpufreq.txt | 37 ++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 Documentation/devicetree/bindings/cpufreq/tegra124-cpufreq.txt diff --git a/Documentation/devicetree/bindings/cpufreq/tegra124-cpufreq.txt b/Documentation/devicetree/bindings/cpufreq/tegra124-cpufreq.txt new file mode 100644 index 0000000..6f3f608 --- /dev/null +++ b/Documentation/devicetree/bindings/cpufreq/tegra124-cpufreq.txt @@ -0,0 +1,37 @@ +Tegra124 CPU frequency scaling driver bindings +---------------------------------------------- + +Both required and optional properties listed below must be defined +under node /cpus/cpu at 0. + +Required properties: +- clocks: Must contain an entry for each entry in clock-names. + See ../clocks/clock-bindings.txt for details. +- clock-names: Must include the following entries: + - cpu_g: Clock mux for the fast CPU cluster. + - cpu_lp: Clock mux for the low-power CPU cluster. + - pll_x: Fast PLL clocksource. + - pll_p: Auxiliary PLL used during fast PLL rate changes. + - dfll: Fast DFLL clocksource that also automatically scales CPU voltage. + +Example: +-------- +cpus { + #address-cells = <1>; + #size-cells = <0>; + + cpu at 0 { + device_type = "cpu"; + compatible = "arm,cortex-a15"; + reg = <0>; + + clocks = <&tegra_car TEGRA124_CLK_CCLK_G>, + <&tegra_car TEGRA124_CLK_CCLK_LP>, + <&tegra_car TEGRA124_CLK_PLL_X>, + <&tegra_car TEGRA124_CLK_PLL_P>, + <&dfll>; + clock-names = "cpu_g", "cpu_lp", "pll_x", "pll_p", "dfll"; + }; + + <...> +}; -- 1.8.1.5