3babe30608
As suggested by Olof Johansson at http://www.spinics.net/lists/arm-kernel/msg314009.html. It be better just keeping a "ti,keystone" top-level compatible and just using that to probe. If so we don't have to touch the file for new boards in the future. So use common "ti,keystone" compatible in keystone.c for all boards. Cc: Santosh Shilimkar <santosh.shilimkar@ti.com> Cc: Olof Johansson <olof@lixom.net> Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
/*
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* Keystone2 based boards and SOC related code.
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*
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* Copyright 2013 Texas Instruments, Inc.
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* Cyril Chemparathy <cyril@ti.com>
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* Santosh Shilimkar <santosh.shillimkar@ti.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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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/init.h>
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#include <linux/of_platform.h>
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#include <linux/of_address.h>
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#include <asm/setup.h>
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#include <asm/mach/map.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/time.h>
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#include <asm/smp_plat.h>
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#include "keystone.h"
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#define PLL_RESET_WRITE_KEY_MASK 0xffff0000
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#define PLL_RESET_WRITE_KEY 0x5a69
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#define PLL_RESET BIT(16)
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static void __iomem *keystone_rstctrl;
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static void __init keystone_init(void)
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{
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struct device_node *node;
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node = of_find_compatible_node(NULL, NULL, "ti,keystone-reset");
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if (WARN_ON(!node))
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pr_warn("ti,keystone-reset node undefined\n");
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keystone_rstctrl = of_iomap(node, 0);
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if (WARN_ON(!keystone_rstctrl))
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pr_warn("ti,keystone-reset iomap error\n");
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keystone_pm_runtime_init();
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of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
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}
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static const char *keystone_match[] __initconst = {
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"ti,keystone",
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NULL,
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};
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void keystone_restart(enum reboot_mode mode, const char *cmd)
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{
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u32 val;
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BUG_ON(!keystone_rstctrl);
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/* Enable write access to RSTCTRL */
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val = readl(keystone_rstctrl);
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val &= PLL_RESET_WRITE_KEY_MASK;
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val |= PLL_RESET_WRITE_KEY;
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writel(val, keystone_rstctrl);
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/* Reset the SOC */
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val = readl(keystone_rstctrl);
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val &= ~PLL_RESET;
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writel(val, keystone_rstctrl);
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}
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DT_MACHINE_START(KEYSTONE, "Keystone")
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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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.smp = smp_ops(keystone_smp_ops),
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.init_machine = keystone_init,
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.dt_compat = keystone_match,
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.restart = keystone_restart,
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MACHINE_END
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