From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754253AbcHVDhi (ORCPT ); Sun, 21 Aug 2016 23:37:38 -0400 Received: from mail-pf0-f193.google.com ([209.85.192.193]:36446 "EHLO mail-pf0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753724AbcHVDgp (ORCPT ); Sun, 21 Aug 2016 23:36:45 -0400 From: Lin Huang To: heiko@sntech.de, myungjoo.ham@samsung.com Cc: tixy@linaro.org, mark.rutland@arm.com, typ@rock-chips.com, linux-rockchip@lists.infradead.org, airlied@linux.ie, mturquette@baylibre.com, dbasehore@chromium.org, sboyd@codeaurora.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, dianders@chromium.org, cw00.choi@samsung.com, kyungmin.park@samsung.com, sudeep.holla@arm.com, linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, mark.yao@rock-chips.com, Lin Huang Subject: [PATCH v7 6/8] Documentation: bindings: add dt documentation for rk3399 dmc Date: Mon, 22 Aug 2016 11:36:22 +0800 Message-Id: <1471836984-6316-7-git-send-email-hl@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1471836984-6316-1-git-send-email-hl@rock-chips.com> References: <1471836984-6316-1-git-send-email-hl@rock-chips.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds the documentation for rockchip rk3399 dmc driver. Signed-off-by: Lin Huang --- Changes in v7: -None Changes in v6: -Add more detail in Documentation Changes in v5: -None Changes in v4: -None Changes in v3: -None Changes in v2: -None Changes in v1: -None .../devicetree/bindings/devfreq/rk3399_dmc.txt | 85 ++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt diff --git a/Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt b/Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt new file mode 100644 index 0000000..b787abb --- /dev/null +++ b/Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt @@ -0,0 +1,85 @@ +* Rockchip rk3399 DMC(Dynamic Memory Controller) device + +Required properties: +- compatible: Must be "rockchip,rk3399-dmc". +- devfreq-events: Node to get DDR loading, Refer to + Documentation/devicetree/bindings/devfreq/rockchip-dfi.txt +- interrupts: The interrupt number to the CPU. The interrupt specifier format + depends on the interrupt controller. It should be DCF interrupts, + when DDR dvfs finish, it will happen. +- clocks: Phandles for clock specified in "clock-names" property +- clock-names : The name of clock used by the DFI, must be "pclk_ddr_mon"; +- operating-points-v2: Refer to Documentation/devicetree/bindings/power/opp.txt + for details. +- center-supply: DMC supply node. +- status: Marks the node enabled/disabled. + +Optional properties: +- ddr_timing: DDR timing need to pass to arm trust firmware +- upthreshold: The upthreshold to simpleondeamnd policy +- downdifferential: The downdifferential to simpleondeamnd policy + +Example: + + ddr_timing: ddr_timing { + compatible = "rockchip,ddr-timing"; + ddr3_speed_bin = <21>; + pd_idle = <0>; + sr_idle = <0>; + sr_mc_gate_idle = <0>; + srpd_lite_idle = <0>; + standby_idle = <0>; + dram_dll_dis_freq = <300>; + phy_dll_dis_freq = <125>; + + ddr3_odt_dis_freq = <333>; + ddr3_drv = ; + ddr3_odt = ; + phy_ddr3_ca_drv = ; + phy_ddr3_dq_drv = ; + phy_ddr3_odt = ; + + lpddr3_odt_dis_freq = <333>; + lpddr3_drv = ; + lpddr3_odt = ; + phy_lpddr3_ca_drv = ; + phy_lpddr3_dq_drv = ; + phy_lpddr3_odt = ; + + lpddr4_odt_dis_freq = <333>; + lpddr4_drv = ; + lpddr4_dq_odt = ; + lpddr4_ca_odt = ; + phy_lpddr4_ca_drv = ; + phy_lpddr4_ck_cs_drv = ; + phy_lpddr4_dq_drv = ; + phy_lpddr4_odt = ; + }; + + dmc_opp_table: dmc_opp_table { + compatible = "operating-points-v2"; + + opp00 { + opp-hz = /bits/ 64 <300000000>; + opp-microvolt = <900000>; + }; + opp01 { + opp-hz = /bits/ 64 <666000000>; + opp-microvolt = <900000>; + }; + }; + + dmc: dmc { + compatible = "rockchip,rk3399-dmc"; + devfreq-events = <&dfi>; + interrupts = ; + clocks = <&cru SCLK_DDRCLK>; + clock-names = "dmc_clk"; + ddr_timing = <&ddr_timing>; + operating-points-v2 = <&dmc_opp_table>; + center-supply = <&ppvar_centerlogic>; + upthreshold = <15>; + downdifferential = <10>; + status = "disabled"; + }; + -- 2.6.6