Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761158AbdDSIvw (ORCPT ); Wed, 19 Apr 2017 04:51:52 -0400 Received: from eusmtp01.atmel.com ([212.144.249.242]:15232 "EHLO eusmtp01.atmel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761080AbdDSIvs (ORCPT ); Wed, 19 Apr 2017 04:51:48 -0400 X-Greylist: delayed 330 seconds by postgrey-1.27 at vger.kernel.org; Wed, 19 Apr 2017 04:51:47 EDT From: Wenyou Yang To: , Alexandre Belloni , Rob Herring , Pawel Moll , Mark Rutland , "Ian Campbell" , Kumar Gala , Russell King CC: , , "Oliver Hartkopp" , , "Quentin Schulz" , Wenyou Yang , , "Wenyou Yang" Subject: [PATCH v2] ARM: dts: at91: sama5d2: add m_can nodes Date: Wed, 19 Apr 2017 16:46:06 +0800 Message-ID: <20170419084606.27543-1-wenyou.yang@atmel.com> X-Mailer: git-send-email 2.11.0 MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4868 Lines: 170 Add nodes to support the Controller Area Network(M_CAN) on SAMA5D2. The version of M_CAN IP core is 3.1.0 (CREL = 0x31040730). As said in SAMA5D2 datasheet, the CAN clock is recommended to use frequencies of 20, 40 or 80 MHz. To achieve these frequencies, PMC GCLK3 must select the UPLLCK(480 MHz) as source clock and divide by 24, 12, or 6. So, the "assigned-clock-rates" property has three options: 20000000, 40000000, and 80000000. The "assigned-clock-parents" property should be referred to utmi fixedly. The MSBs [bits 31:16] of the CAN Message RAM for CAN0 and CAN1 are default configured in 0x00200000. To avoid conflict with SRAM map for PM, change them to 0x00210000 in the AT91Bootstrap via setting the CAN Memories Address-based Register(SFR_CAN) of SFR. Signed-off-by: Wenyou Yang --- The patch is tested on SAMA5D2 Xplained and based on the patch set, 1. [PATCH v4 1/7] can: m_can: Disabled Interrupt Line 1 http://marc.info/?l=linux-can&m=149165343604033&w=2 Changes in v2: - Configures 10 TX Event FIFO elements and 10 TX Buffers/FIFO slots, because the TXE FIFO is needed to be configured. - Configure the offset of Message RAM for CAN1 followed from CAN0's. arch/arm/boot/dts/at91-sama5d2_xplained.dts | 24 +++++++++++++ arch/arm/boot/dts/sama5d2.dtsi | 56 +++++++++++++++++++++++++++++ 2 files changed, 80 insertions(+) diff --git a/arch/arm/boot/dts/at91-sama5d2_xplained.dts b/arch/arm/boot/dts/at91-sama5d2_xplained.dts index 9f7f8a7d8ff9..2f19b08dc226 100644 --- a/arch/arm/boot/dts/at91-sama5d2_xplained.dts +++ b/arch/arm/boot/dts/at91-sama5d2_xplained.dts @@ -257,6 +257,12 @@ status = "okay"; }; + can0: can@f8054000 { + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_can0_default>; + status = "okay"; + }; + uart3: serial@fc008000 { atmel,use-dma-rx; atmel,use-dma-tx; @@ -321,6 +327,18 @@ bias-disable; }; + pinctrl_can0_default: can0_default { + pinmux = , + ; + bias-disable; + }; + + pinctrl_can1_default: can1_default { + pinmux = , + ; + bias-disable; + }; + pinctrl_charger_chglev: charger_chglev { pinmux = ; bias-disable; @@ -468,6 +486,12 @@ }; }; + + can1: can@fc050000 { + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_can1_default>; + status = "okay"; + }; }; }; diff --git a/arch/arm/boot/dts/sama5d2.dtsi b/arch/arm/boot/dts/sama5d2.dtsi index 22332be72140..383ca9307edf 100644 --- a/arch/arm/boot/dts/sama5d2.dtsi +++ b/arch/arm/boot/dts/sama5d2.dtsi @@ -762,6 +762,18 @@ atmel,clk-output-range = <0 83000000>; }; + can0_clk: can0_clk { + #clock-cells = <0>; + reg = <56>; + atmel,clk-output-range = <0 83000000>; + }; + + can1_clk: can1_clk { + #clock-cells = <0>; + reg = <57>; + atmel,clk-output-range = <0 83000000>; + }; + classd_clk: classd_clk { #clock-cells = <0>; reg = <59>; @@ -890,6 +902,18 @@ #clock-cells = <0>; reg = <55>; }; + + can0_gclk: can0_gclk { + #clock-cells = <0>; + reg = <56>; + atmel,clk-output-range = <0 80000000>; + }; + + can1_gclk: can1_gclk { + #clock-cells = <0>; + reg = <57>; + atmel,clk-output-range = <0 80000000>; + }; }; }; @@ -1144,6 +1168,22 @@ clocks = <&clk32k>; }; + can0: can@f8054000 { + compatible = "bosch,m_can"; + reg = <0xf8054000 0x4000>, <0x210000 0x4000>; + reg-names = "m_can", "message_ram"; + interrupts = <56 IRQ_TYPE_LEVEL_HIGH 7>, + <64 IRQ_TYPE_LEVEL_HIGH 7>; + interrupt-names = "int0", "int1"; + clocks = <&can0_clk>, <&can0_gclk>; + clock-names = "hclk", "cclk"; + assigned-clocks = <&can0_gclk>; + assigned-clock-parents = <&utmi>; + assigned-clock-rates = <40000000>; + bosch,mram-cfg = <0x0 0 0 32 0 0 10 10>; + status = "disabled"; + }; + spi1: spi@fc000000 { compatible = "atmel,at91rm9200-spi"; reg = <0xfc000000 0x100>; @@ -1305,6 +1345,22 @@ status = "okay"; }; + can1: can@fc050000 { + compatible = "bosch,m_can"; + reg = <0xfc050000 0x4000>, <0x210000 0x4000>; + reg-names = "m_can", "message_ram"; + interrupts = <57 IRQ_TYPE_LEVEL_HIGH 7>, + <65 IRQ_TYPE_LEVEL_HIGH 7>; + interrupt-names = "int0", "int1"; + clocks = <&can1_clk>, <&can1_gclk>; + clock-names = "hclk", "cclk"; + assigned-clocks = <&can1_gclk>; + assigned-clock-parents = <&utmi>; + assigned-clock-rates = <40000000>; + bosch,mram-cfg = <0x1100 0 0 32 0 0 10 10>; + status = "disabled"; + }; + chipid@fc069000 { compatible = "atmel,sama5d2-chipid"; reg = <0xfc069000 0x8>; -- 2.11.0