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7cca9b8b7c
The microblaze uses the legacy APIs to dig out a GPIO pin defined in the root of the device tree to issue a hard reset of the platform. Asserting a hard reset should be done using the standard DT-enabled and fully GPIO descriptor aware driver in drivers/power/reset/gpio-restart.c using the bindings from Documentation/devicetree/bindings/power/reset/gpio-restart.txt To achieve this, first make sure microblaze makes use of the standard kernel restart path utilizing do_kernel_restart() from <linux/reboot.h>. Put in some grace time and an emergency print if the restart does not properly assert. As this is basic platform functionality we patch the DTS file and defconfig in one go for a lockstep change. Cc: Arnd Bergmann <arnd@arndb.de> Cc: Michal Simek <monstr@monstr.eu> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> [ Michal: Move machine_restart back to reset.c ] Signed-off-by: Michal Simek <michal.simek@xilinx.com>
44 lines
809 B
C
44 lines
809 B
C
/*
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* Copyright (C) 2009 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2009 PetaLogix
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/of_platform.h>
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#include <linux/reboot.h>
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void machine_shutdown(void)
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{
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pr_notice("Machine shutdown...\n");
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while (1)
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;
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}
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void machine_halt(void)
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{
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pr_notice("Machine halt...\n");
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while (1)
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;
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}
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void machine_power_off(void)
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{
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pr_notice("Machine power off...\n");
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while (1)
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;
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}
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void machine_restart(char *cmd)
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{
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do_kernel_restart(cmd);
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/* Give the restart hook 1 s to take us down */
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mdelay(1000);
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pr_emerg("Reboot failed -- System halted\n");
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while (1);
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}
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