Hi Olof, On 28 August 2014 09:26, Olof Johansson <olof@xxxxxxxxx> wrote: > Hi, > > On Wed, Aug 27, 2014 at 03:14:18PM +0530, Naveen Krishna Chatradhi wrote: >> Add initial device tree nodes for EXYNOS7 SoC. >> Also, includes the dt-binding definitions for clock ids. > > Uh, no -- it just adds the dtsi. Ok. Will fix. > >> Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@xxxxxxxxxxx> >> Cc: Thomas Abraham <thomas.ab@xxxxxxxxxxx> >> Cc: Rob Herring <robh@xxxxxxxxxx> >> Cc: Catalin Marinas <catalin.marinas@xxxxxxx> >> --- >> arch/arm64/boot/dts/exynos7.dtsi | 553 ++++++++++++++++++++++++++++++++++++++ >> 1 file changed, 553 insertions(+) >> create mode 100644 arch/arm64/boot/dts/exynos7.dtsi >> >> diff --git a/arch/arm64/boot/dts/exynos7.dtsi b/arch/arm64/boot/dts/exynos7.dtsi >> new file mode 100644 >> index 0000000..6b9eaf4 >> --- /dev/null >> +++ b/arch/arm64/boot/dts/exynos7.dtsi > > Let's not make the same mistake as on 32-bit, and go with a directory > hierarchy here from day one. > > So, please create a exynos subdirectory for this file. You also need > a Makefile when you add a board dts. Ok. Will fix. > >> @@ -0,0 +1,553 @@ >> +/* >> + * SAMSUNG EXYNOS7 SoC device tree source >> + * >> + * Copyright (c) 2014 Samsung Electronics Co., Ltd. >> + * http://www.samsung.com >> + * >> + * SAMSUNG EXYNOS7 SoC device nodes are listed in this file. >> + * EXYNOS7 based board files can include this file and provide >> + * values for board specfic bindings. >> + * >> + * This program is free software; you can redistribute it and/or modify >> + * it under the terms of the GNU General Public License version 2 as >> + * published by the Free Software Foundation. >> + */ >> + >> +#include <dt-bindings/clock/exynos7-clk.h> >> + >> +/ { >> + compatible = "samsung,exynos7"; >> + interrupt-parent = <&gic>; >> + #address-cells = <1>; >> + #size-cells = <1>; > > You should probably use address-cells/size-cells 2/2 on a 64-bit platform. Ok. > >> + aliases { >> + pinctrl0 = &pinctrl_0; >> + pinctrl1 = &pinctrl_1; >> + pinctrl2 = &pinctrl_2; >> + pinctrl3 = &pinctrl_3; >> + pinctrl4 = &pinctrl_4; >> + pinctrl5 = &pinctrl_5; >> + pinctrl6 = &pinctrl_6; >> + pinctrl7 = &pinctrl_7; >> + pinctrl8 = &pinctrl_8; >> + pinctrl9 = &pinctrl_9; >> + mshc0 = &mmc_0; >> + mshc2 = &mmc_2; >> + }; >> + >> + chipid@10000000 { >> + compatible = "samsung,exynos4210-chipid"; >> + reg = <0x10000000 0x100>; >> + }; >> + >> + cpus { >> + #address-cells = <2>; >> + #size-cells = <0>; > > Why size-cells=2? Can you not fit a cpuid in 32 bits? > >> + cpu@0 { >> + device_type = "cpu"; >> + compatible = "arm,cortex-a57", "arm,armv8"; >> + reg = <0x0 0x0>; >> + }; >> + }; >> + >> + fin_pll: xxti { >> + compatible = "fixed-clock"; >> + clock-frequency = <24000000>; >> + clock-output-names = "fin_pll"; >> + #clock-cells = <0>; >> + }; >> + >> + gic: interrupt-controller@11001000 { >> + compatible = "arm,gic-400"; >> + #interrupt-cells = <3>; >> + #address-cells = <0>; >> + interrupt-controller; >> + reg = <0x11001000 0x1000>, >> + <0x11002000 0x1000>, >> + <0x11004000 0x2000>, >> + <0x11006000 0x2000>; >> + }; >> + >> + hsi2c_0: hsi2c@13640000 { >> + compatible = "samsung,exynos7-hsi2c"; > > Is the i2c controller here completely new? It is almost the same as in Exynos5 but few register bits have been changed. So we have added a new compatible string. > > Also, please use 'i2c' for node name on these nodes. Ok. > >> + reg = <0x13640000 0x1000>; >> + interrupts = <0 441 0>; >> + #address-cells = <1>; >> + #size-cells = <0>; >> + pinctrl-names = "default"; >> + pinctrl-0 = <&hs_i2c0_bus>; >> + clocks = <&clock_peric0 PCLK_HSI2C0>; >> + clock-names = "hsi2c"; >> + status = "disabled"; >> + }; >> + >> + hsi2c_1: hsi2c@13650000 { >> + compatible = "samsung,exynos7-hsi2c"; >> + reg = <0x13650000 0x1000>; >> + interrupts = <0 442 0>; >> + #address-cells = <1>; >> + #size-cells = <0>; >> + pinctrl-names = "default"; >> + pinctrl-0 = <&hs_i2c1_bus>; >> + clocks = <&clock_peric0 PCLK_HSI2C1>; >> + clock-names = "hsi2c"; >> + status = "disabled"; >> + }; >> + >> + hsi2c_2: hsi2c@14E60000 { > > I much prefer lowercase hex in unit addresses (and reg entries) below. I > know 32-bit uses uppercase, but let's switch going forward here. Ok. Will fix. > >> + mct@101C0000 { >> + compatible = "samsung,exynos4210-mct"; > > Please just do away with MCT here, and use architected timers going > forward. There really shouldn't be a need to keep supporting MCT any > more -- it's a construct from before arch timers on Cortex-A9. Ok. > >> + mmc_0: mmc@15740000 { >> + compatible = "samsung,exynos7-dw-mshc-smu"; > > Is this controller backwards compatible with exynos5 ones? The dwmmc controller in Exynos7 is not fully backward compatible with Exynos5. Specifically, it requires 64-bit related changes for IDMAC and handling the changes in register offsets. > >> + /* The Clock nodes are ordered as per the usermanual. */ > > "The clock" > > "user manual" Ok. > >> + timer { >> + compatible = "arm,armv8-timer"; >> + interrupts = <1 13 0xff01>, >> + <1 14 0xff01>, >> + <1 11 0xff01>, >> + <1 10 0xff01>; >> + clock-frequency = <24000000>; >> + use-clocksource-only; >> + use-physical-timer; > > These two properties are not standard, and I would expect any 64-bit > platform to come with PSCI such that you have a way to initialize the > virtual timers. Ok. > > > -Olof Thanks for your comments. -- Shine bright, (: Nav :) -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
