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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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1963a2afc8
Add the 'gpiomux' api, which addresses the following shortcomings of existing tlmm api: - gpio power-collapse, which is managed by a peripheral processor on other targets, must be managed by the application processor on the 8x60. - The enable/disable flag of the legacy gpio_tlmm_config api is not applicable on the 8x60, and causes confusion. - The gpio 'direction' bits are meaningless for all func_sel configurations except for generic-gpio mode (func_sel 0), in which case the gpio_direction_* functions should be used. Having these bits in the tlmm api leads to confusion and misuse of the gpiolib api, and they have been removed in gpiomux. - The functional api of the legacy system ran contrary to the typical use-case, which is a single massive configuration at boot. Rather than forcing hundreds of 'config' function calls, the new api allows data to be configured with a single table. gpiomux_get and gpiomux_put are meant to be called automatically when gpio_request and gpio_free are called, giving automatic gpiomux/tlmm control to those drivers/lines with simple power profiles - in the simplest cases, an entry in the gpiomux table and the correct usage of gpiolib is all that is required to get proper gpio power control. Signed-off-by: Gregory Bean <gbean@codeaurora.org> Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
/*
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* Copyright (C) 2007 Google, Inc.
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* Copyright (c) 2008-2010, Code Aurora Forum. All rights reserved.
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* Author: Brian Swetland <swetland@google.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*
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* The MSM peripherals are spread all over across 768MB of physical
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* space, which makes just having a simple IO_ADDRESS macro to slide
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* them into the right virtual location rough. Instead, we will
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* provide a master phys->virt mapping for peripherals here.
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*
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*/
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#ifndef __ASM_ARCH_MSM_IOMAP_8X60_H
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#define __ASM_ARCH_MSM_IOMAP_8X60_H
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/* Physical base address and size of peripherals.
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* Ordered by the virtual base addresses they will be mapped at.
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*
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* MSM_VIC_BASE must be an value that can be loaded via a "mov"
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* instruction, otherwise entry-macro.S will not compile.
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*
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* If you add or remove entries here, you'll want to edit the
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* msm_io_desc array in arch/arm/mach-msm/io.c to reflect your
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* changes.
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*
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*/
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#define MSM_TLMM_BASE IOMEM(0xF0004000)
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#define MSM_TLMM_PHYS 0x00800000
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#define MSM_TLMM_SIZE SZ_16K
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#endif
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