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189621726b
The clock controller also includes some reset lines. This patch implements a reset controller to assert and de-assert these resets. The reset controller itself is registered early (through CLK_OF_DECLARE_DRIVER) because it is needed very early in the boot process (to start the secondary CPU cores). According to the public S805 datasheet there are two more reset bits in the HHI_SYS_CPU_CLK_CNTL0 register, which are not implemented by this patch (as these seem to be unused in Amlogic's vendor Linux kernel sources and their u-boot tree): - bit 15: GEN_DIV_SOFT_RESET - bit 14: SOFT_RESET All information was taken from the public S805 Datasheet and Amlogic's vendor GPL kernel sources. This patch is based on an earlier version submitted by Carlo Caione. Suggested-by: Carlo Caione <carlo@endlessm.com> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
81 lines
3.3 KiB
C
81 lines
3.3 KiB
C
/*
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* Copyright (c) 2015 Endless Mobile, Inc.
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* Author: Carlo Caione <carlo@endlessm.com>
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*
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* Copyright (c) 2016 BayLibre, Inc.
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* Michael Turquette <mturquette@baylibre.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __MESON8B_H
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#define __MESON8B_H
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/*
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* Clock controller register offsets
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*
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* Register offsets from the HardKernel[0] data sheet are listed in comment
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* blocks below. Those offsets must be multiplied by 4 before adding them to
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* the base address to get the right value
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*
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* [0] http://dn.odroid.com/S805/Datasheet/S805_Datasheet%20V0.8%2020150126.pdf
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*/
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#define HHI_GCLK_MPEG0 0x140 /* 0x50 offset in data sheet */
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#define HHI_GCLK_MPEG1 0x144 /* 0x51 offset in data sheet */
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#define HHI_GCLK_MPEG2 0x148 /* 0x52 offset in data sheet */
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#define HHI_GCLK_OTHER 0x150 /* 0x54 offset in data sheet */
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#define HHI_GCLK_AO 0x154 /* 0x55 offset in data sheet */
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#define HHI_SYS_CPU_CLK_CNTL1 0x15c /* 0x57 offset in data sheet */
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#define HHI_MPEG_CLK_CNTL 0x174 /* 0x5d offset in data sheet */
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#define HHI_VID_CLK_CNTL 0x17c /* 0x5f offset in data sheet */
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#define HHI_VID_DIVIDER_CNTL 0x198 /* 0x66 offset in data sheet */
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#define HHI_SYS_CPU_CLK_CNTL0 0x19c /* 0x67 offset in data sheet */
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#define HHI_MPLL_CNTL 0x280 /* 0xa0 offset in data sheet */
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#define HHI_SYS_PLL_CNTL 0x300 /* 0xc0 offset in data sheet */
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#define HHI_VID_PLL_CNTL 0x320 /* 0xc8 offset in data sheet */
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/*
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* MPLL register offeset taken from the S905 datasheet. Vendor kernel source
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* confirm these are the same for the S805.
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*/
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#define HHI_MPLL_CNTL 0x280 /* 0xa0 offset in data sheet */
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#define HHI_MPLL_CNTL2 0x284 /* 0xa1 offset in data sheet */
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#define HHI_MPLL_CNTL3 0x288 /* 0xa2 offset in data sheet */
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#define HHI_MPLL_CNTL4 0x28C /* 0xa3 offset in data sheet */
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#define HHI_MPLL_CNTL5 0x290 /* 0xa4 offset in data sheet */
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#define HHI_MPLL_CNTL6 0x294 /* 0xa5 offset in data sheet */
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#define HHI_MPLL_CNTL7 0x298 /* 0xa6 offset in data sheet */
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#define HHI_MPLL_CNTL8 0x29C /* 0xa7 offset in data sheet */
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#define HHI_MPLL_CNTL9 0x2A0 /* 0xa8 offset in data sheet */
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#define HHI_MPLL_CNTL10 0x2A4 /* 0xa9 offset in data sheet */
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/*
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* CLKID index values
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*
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* These indices are entirely contrived and do not map onto the hardware.
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* It has now been decided to expose everything by default in the DT header:
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* include/dt-bindings/clock/gxbb-clkc.h. Only the clocks ids we don't want
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* to expose, such as the internal muxes and dividers of composite clocks,
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* will remain defined here.
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*/
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#define CLK_NR_CLKS 96
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/*
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* include the CLKID and RESETID that have
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* been made part of the stable DT binding
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*/
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#include <dt-bindings/clock/meson8b-clkc.h>
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#include <dt-bindings/reset/amlogic,meson8b-clkc-reset.h>
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#endif /* __MESON8B_H */
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