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authorLinus Torvalds <torvalds@linux-foundation.org>2015-02-17 09:15:46 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-17 09:15:46 -0800
commit4025fa97ff39db054b47b9cdb9f3980480637668 (patch)
tree1be796bfa9b2d7f8b6f9a05034f9cede3eb28e8d /arch/arm/mach-omap2/ti81xx-restart.c
parentc397f8fa4379040bada53256c848e62c8b060392 (diff)
parent11fe05de8b73816b7d12309ae55ca61c531c4e06 (diff)
downloadop-kernel-dev-4025fa97ff39db054b47b9cdb9f3980480637668.zip
op-kernel-dev-4025fa97ff39db054b47b9cdb9f3980480637668.tar.gz
Merge tag 'fixes-non-critical-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC non-critical fixes from Olof Johansson: "Here's a small collection of fixes accrued during the last release that weren't considered severe enough to merge during the -rc series. A few of these are around resurrecting TI81xx support that's been broken for quite a while, the rest are smaller fixes -- most for PXA but a few across the board. There are also some updates to MAINTAINERS here, in particular for Broadcom platforms" * tag 'fixes-non-critical-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (23 commits) MAINTAINERS: fix git repositories for Broadcom SoCs ARM: pxa: fix broken isa interrupts for zeus and viper ARM: DRA7: hwmod: Fix boot crash with DEBUG_LL enabled on UART3 ARM: OMAP: DRA7: hwmod: Make gpmc software supervised as the smart idle is broken ARM: AM43xx: hwmod: set DSS submodule parent hwmods ARM: OMAP2+: hwmod: print error if wait_target_ready() failed MAINTAINERS: add maintainer for OMAP hwmod data ARM: OMAP2+: Disable omap3 PM init for ti81xx ARM: OMAP2+: Fix reboot for 81xx ARM: OMAP2+: Fix dm814 and dm816 for clocks and timer init ARM: OMAP2+: Fix ti81xx class type ARM: OMAP2+: Fix ti81xx devtype ARM: OMAP2+: Fix error handling for omap2_clk_enable_init_clocks MAINTAINERS: add a git entry for BMIPS-based BCM7xxx SoCs MAINTAINERS: add a git entry for BCM7xxx ARM-based SoCs MAINTAINERS: update Broadcom Cygnus SoC git tree MAINTAINERS: move BCM63xx ARM-based SoCs git tree hx4700: regulator: declare full constraints ARM: pxa: add regulator_has_full_constraints to spitz board file ARM: pxa: add regulator_has_full_constraints to poodle board file ...
Diffstat (limited to 'arch/arm/mach-omap2/ti81xx-restart.c')
-rw-r--r--arch/arm/mach-omap2/ti81xx-restart.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/ti81xx-restart.c b/arch/arm/mach-omap2/ti81xx-restart.c
new file mode 100644
index 0000000..6c3ce7c
--- /dev/null
+++ b/arch/arm/mach-omap2/ti81xx-restart.c
@@ -0,0 +1,34 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/reboot.h>
+
+#include "iomap.h"
+#include "common.h"
+#include "control.h"
+#include "prm3xxx.h"
+
+#define TI81XX_PRM_DEVICE_RSTCTRL 0x00a0
+#define TI81XX_GLOBAL_RST_COLD BIT(1)
+
+/**
+ * ti81xx_restart - trigger a software restart of the SoC
+ * @mode: the "reboot mode", see arch/arm/kernel/{setup,process}.c
+ * @cmd: passed from the userspace program rebooting the system (if provided)
+ *
+ * Resets the SoC. For @cmd, see the 'reboot' syscall in
+ * kernel/sys.c. No return value.
+ *
+ * NOTE: Warm reset does not seem to work, may require resetting
+ * clocks to bypass mode.
+ */
+void ti81xx_restart(enum reboot_mode mode, const char *cmd)
+{
+ omap2_prm_set_mod_reg_bits(TI81XX_GLOBAL_RST_COLD, 0,
+ TI81XX_PRM_DEVICE_RSTCTRL);
+ while (1);
+}
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