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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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f86a2c875f
The commit55ee7017ee("arm: omap2: board-generic: use omap4_local_timer_init for AM437x") unintentionally changes the clocksource devices for AM437x from OMAP GP Timer to SyncTimer32K. Unfortunately, the SyncTimer32K is starving from frequency deviation as mentioned in commit5b5c013591("ARM: OMAP2+: AM43x: Use gptimer as clocksource") and, as reported by Franklin [1], even its monotonic nature is under question (most probably there is a HW issue, but it's still under investigation). Taking into account above facts It's reasonable to rollback to the use of omap3_gptimer_timer_init(). [1] http://www.spinics.net/lists/linux-omap/msg127425.html Fixes:55ee7017ee("arm: omap2: board-generic: use omap4_local_timer_init for AM437x") Reported-by: Cooper Jr., Franklin <fcooper@ti.com> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Keerthy <j-keerthy@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
361 lines
9.1 KiB
C
361 lines
9.1 KiB
C
/*
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* Copyright (C) 2005 Nokia Corporation
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* Author: Paul Mundt <paul.mundt@nokia.com>
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*
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* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
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*
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* Modified from the original mach-omap/omap2/board-generic.c did by Paul
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* to support the OMAP2+ device tree boards with an unique board file.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/io.h>
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#include <linux/of_irq.h>
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#include <linux/of_platform.h>
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#include <linux/irqdomain.h>
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#include <asm/setup.h>
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#include <asm/mach/arch.h>
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#include <asm/system_info.h>
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#include "common.h"
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static const struct of_device_id omap_dt_match_table[] __initconst = {
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{ .compatible = "simple-bus", },
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{ .compatible = "ti,omap-infra", },
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{ }
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};
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static void __init omap_generic_init(void)
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{
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pdata_quirks_init(omap_dt_match_table);
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omapdss_init_of();
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}
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#ifdef CONFIG_SOC_OMAP2420
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static const char *const omap242x_boards_compat[] __initconst = {
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"ti,omap2420",
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NULL,
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};
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DT_MACHINE_START(OMAP242X_DT, "Generic OMAP2420 (Flattened Device Tree)")
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.reserve = omap_reserve,
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.map_io = omap242x_map_io,
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.init_early = omap2420_init_early,
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.init_machine = omap_generic_init,
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.init_time = omap_init_time,
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.dt_compat = omap242x_boards_compat,
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.restart = omap2xxx_restart,
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MACHINE_END
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#endif
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#ifdef CONFIG_SOC_OMAP2430
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static const char *const omap243x_boards_compat[] __initconst = {
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"ti,omap2430",
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NULL,
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};
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DT_MACHINE_START(OMAP243X_DT, "Generic OMAP2430 (Flattened Device Tree)")
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.reserve = omap_reserve,
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.map_io = omap243x_map_io,
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.init_early = omap2430_init_early,
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.init_machine = omap_generic_init,
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.init_time = omap_init_time,
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.dt_compat = omap243x_boards_compat,
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.restart = omap2xxx_restart,
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MACHINE_END
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#endif
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#ifdef CONFIG_ARCH_OMAP3
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/* Some boards need board name for legacy userspace in /proc/cpuinfo */
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static const char *const n900_boards_compat[] __initconst = {
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"nokia,omap3-n900",
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NULL,
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};
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/* Set system_rev from atags */
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static void __init rx51_set_system_rev(const struct tag *tags)
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{
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const struct tag *tag;
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if (tags->hdr.tag != ATAG_CORE)
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return;
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for_each_tag(tag, tags) {
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if (tag->hdr.tag == ATAG_REVISION) {
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system_rev = tag->u.revision.rev;
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break;
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}
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}
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}
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/* Legacy userspace on Nokia N900 needs ATAGS exported in /proc/atags,
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* save them while the data is still not overwritten
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*/
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static void __init rx51_reserve(void)
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{
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const struct tag *tags = (const struct tag *)(PAGE_OFFSET + 0x100);
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save_atags(tags);
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rx51_set_system_rev(tags);
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omap_reserve();
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}
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DT_MACHINE_START(OMAP3_N900_DT, "Nokia RX-51 board")
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.reserve = rx51_reserve,
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.map_io = omap3_map_io,
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.init_early = omap3430_init_early,
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.init_machine = omap_generic_init,
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.init_late = omap3_init_late,
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.init_time = omap_init_time,
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.dt_compat = n900_boards_compat,
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.restart = omap3xxx_restart,
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MACHINE_END
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/* Generic omap3 boards, most boards can use these */
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static const char *const omap3_boards_compat[] __initconst = {
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"ti,omap3430",
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"ti,omap3",
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NULL,
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};
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DT_MACHINE_START(OMAP3_DT, "Generic OMAP3 (Flattened Device Tree)")
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.reserve = omap_reserve,
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.map_io = omap3_map_io,
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.init_early = omap3430_init_early,
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.init_machine = omap_generic_init,
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.init_late = omap3_init_late,
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.init_time = omap_init_time,
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.dt_compat = omap3_boards_compat,
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.restart = omap3xxx_restart,
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MACHINE_END
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static const char *const omap36xx_boards_compat[] __initconst = {
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"ti,omap3630",
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"ti,omap36xx",
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NULL,
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};
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DT_MACHINE_START(OMAP36XX_DT, "Generic OMAP36xx (Flattened Device Tree)")
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.reserve = omap_reserve,
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.map_io = omap3_map_io,
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.init_early = omap3630_init_early,
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.init_machine = omap_generic_init,
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.init_late = omap3_init_late,
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.init_time = omap_init_time,
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.dt_compat = omap36xx_boards_compat,
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.restart = omap3xxx_restart,
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MACHINE_END
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static const char *const omap3_gp_boards_compat[] __initconst = {
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"ti,omap3-beagle",
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"timll,omap3-devkit8000",
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NULL,
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};
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DT_MACHINE_START(OMAP3_GP_DT, "Generic OMAP3-GP (Flattened Device Tree)")
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.reserve = omap_reserve,
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.map_io = omap3_map_io,
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.init_early = omap3430_init_early,
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.init_machine = omap_generic_init,
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.init_late = omap3_init_late,
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.init_time = omap3_secure_sync32k_timer_init,
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.dt_compat = omap3_gp_boards_compat,
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.restart = omap3xxx_restart,
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MACHINE_END
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static const char *const am3517_boards_compat[] __initconst = {
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"ti,am3517",
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NULL,
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};
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DT_MACHINE_START(AM3517_DT, "Generic AM3517 (Flattened Device Tree)")
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.reserve = omap_reserve,
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.map_io = omap3_map_io,
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.init_early = am35xx_init_early,
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.init_machine = omap_generic_init,
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.init_late = omap3_init_late,
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.init_time = omap3_gptimer_timer_init,
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.dt_compat = am3517_boards_compat,
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.restart = omap3xxx_restart,
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MACHINE_END
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#endif
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#ifdef CONFIG_SOC_TI81XX
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static const char *const ti814x_boards_compat[] __initconst = {
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"ti,dm8148",
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"ti,dm814",
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NULL,
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};
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DT_MACHINE_START(TI814X_DT, "Generic ti814x (Flattened Device Tree)")
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.reserve = omap_reserve,
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.map_io = ti81xx_map_io,
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.init_early = ti814x_init_early,
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.init_machine = omap_generic_init,
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.init_late = ti81xx_init_late,
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.init_time = omap3_gptimer_timer_init,
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.dt_compat = ti814x_boards_compat,
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.restart = ti81xx_restart,
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MACHINE_END
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static const char *const ti816x_boards_compat[] __initconst = {
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"ti,dm8168",
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"ti,dm816",
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NULL,
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};
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DT_MACHINE_START(TI816X_DT, "Generic ti816x (Flattened Device Tree)")
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.reserve = omap_reserve,
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.map_io = ti81xx_map_io,
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.init_early = ti816x_init_early,
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.init_machine = omap_generic_init,
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.init_late = ti81xx_init_late,
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.init_time = omap3_gptimer_timer_init,
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.dt_compat = ti816x_boards_compat,
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.restart = ti81xx_restart,
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MACHINE_END
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#endif
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#ifdef CONFIG_SOC_AM33XX
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static const char *const am33xx_boards_compat[] __initconst = {
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"ti,am33xx",
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NULL,
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};
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DT_MACHINE_START(AM33XX_DT, "Generic AM33XX (Flattened Device Tree)")
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.reserve = omap_reserve,
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.map_io = am33xx_map_io,
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.init_early = am33xx_init_early,
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.init_machine = omap_generic_init,
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.init_late = am33xx_init_late,
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.init_time = omap3_gptimer_timer_init,
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.dt_compat = am33xx_boards_compat,
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.restart = am33xx_restart,
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MACHINE_END
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#endif
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#ifdef CONFIG_ARCH_OMAP4
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static const char *const omap4_boards_compat[] __initconst = {
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"ti,omap4460",
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"ti,omap4430",
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"ti,omap4",
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NULL,
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};
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DT_MACHINE_START(OMAP4_DT, "Generic OMAP4 (Flattened Device Tree)")
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.l2c_aux_val = OMAP_L2C_AUX_CTRL,
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.l2c_aux_mask = 0xcf9fffff,
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.l2c_write_sec = omap4_l2c310_write_sec,
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.reserve = omap_reserve,
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.smp = smp_ops(omap4_smp_ops),
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.map_io = omap4_map_io,
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.init_early = omap4430_init_early,
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.init_irq = omap_gic_of_init,
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.init_machine = omap_generic_init,
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.init_late = omap4430_init_late,
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.init_time = omap4_local_timer_init,
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.dt_compat = omap4_boards_compat,
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.restart = omap44xx_restart,
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MACHINE_END
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#endif
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#ifdef CONFIG_SOC_OMAP5
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static const char *const omap5_boards_compat[] __initconst = {
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"ti,omap5432",
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"ti,omap5430",
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"ti,omap5",
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NULL,
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};
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DT_MACHINE_START(OMAP5_DT, "Generic OMAP5 (Flattened Device Tree)")
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#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
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.dma_zone_size = SZ_2G,
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#endif
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.reserve = omap_reserve,
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.smp = smp_ops(omap4_smp_ops),
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.map_io = omap5_map_io,
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.init_early = omap5_init_early,
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.init_irq = omap_gic_of_init,
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.init_machine = omap_generic_init,
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.init_late = omap5_init_late,
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.init_time = omap5_realtime_timer_init,
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.dt_compat = omap5_boards_compat,
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.restart = omap44xx_restart,
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MACHINE_END
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#endif
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#ifdef CONFIG_SOC_AM43XX
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static const char *const am43_boards_compat[] __initconst = {
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"ti,am4372",
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"ti,am43",
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NULL,
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};
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DT_MACHINE_START(AM43_DT, "Generic AM43 (Flattened Device Tree)")
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.l2c_aux_val = OMAP_L2C_AUX_CTRL,
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.l2c_aux_mask = 0xcf9fffff,
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.l2c_write_sec = omap4_l2c310_write_sec,
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.map_io = am33xx_map_io,
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.init_early = am43xx_init_early,
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.init_late = am43xx_init_late,
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.init_irq = omap_gic_of_init,
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.init_machine = omap_generic_init,
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.init_time = omap3_gptimer_timer_init,
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.dt_compat = am43_boards_compat,
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.restart = omap44xx_restart,
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MACHINE_END
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#endif
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#ifdef CONFIG_SOC_DRA7XX
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static const char *const dra74x_boards_compat[] __initconst = {
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"ti,am5728",
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"ti,am5726",
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"ti,dra742",
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"ti,dra7",
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NULL,
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};
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DT_MACHINE_START(DRA74X_DT, "Generic DRA74X (Flattened Device Tree)")
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#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
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.dma_zone_size = SZ_2G,
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#endif
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.reserve = omap_reserve,
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.smp = smp_ops(omap4_smp_ops),
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.map_io = dra7xx_map_io,
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.init_early = dra7xx_init_early,
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.init_late = dra7xx_init_late,
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.init_irq = omap_gic_of_init,
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.init_machine = omap_generic_init,
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.init_time = omap5_realtime_timer_init,
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.dt_compat = dra74x_boards_compat,
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.restart = omap44xx_restart,
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MACHINE_END
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static const char *const dra72x_boards_compat[] __initconst = {
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"ti,am5718",
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"ti,am5716",
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"ti,dra722",
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"ti,dra718",
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NULL,
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};
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DT_MACHINE_START(DRA72X_DT, "Generic DRA72X (Flattened Device Tree)")
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#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
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.dma_zone_size = SZ_2G,
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#endif
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.reserve = omap_reserve,
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.map_io = dra7xx_map_io,
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.init_early = dra7xx_init_early,
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.init_late = dra7xx_init_late,
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.init_irq = omap_gic_of_init,
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.init_machine = omap_generic_init,
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.init_time = omap5_realtime_timer_init,
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.dt_compat = dra72x_boards_compat,
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.restart = omap44xx_restart,
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MACHINE_END
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#endif
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