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diff --git a/Documentation/arm/firmware.txt b/Documentation/arm/firmware.txt
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-Interface for registering and calling firmware-specific operations for ARM.
-----
-Written by Tomasz Figa <t.figa@samsung.com>
-
-Some boards are running with secure firmware running in TrustZone secure
-world, which changes the way some things have to be initialized. This makes
-a need to provide an interface for such platforms to specify available firmware
-operations and call them when needed.
-
-Firmware operations can be specified by filling in a struct firmware_ops
-with appropriate callbacks and then registering it with register_firmware_ops()
-function.
-
-	void register_firmware_ops(const struct firmware_ops *ops)
-
-The ops pointer must be non-NULL. More information about struct firmware_ops
-and its members can be found in arch/arm/include/asm/firmware.h header.
-
-There is a default, empty set of operations provided, so there is no need to
-set anything if platform does not require firmware operations.
-
-To call a firmware operation, a helper macro is provided
-
-	#define call_firmware_op(op, ...)				\
-		((firmware_ops->op) ? firmware_ops->op(__VA_ARGS__) : (-ENOSYS))
-
-the macro checks if the operation is provided and calls it or otherwise returns
--ENOSYS to signal that given operation is not available (for example, to allow
-fallback to legacy operation).
-
-Example of registering firmware operations:
-
-	/* board file */
-
-	static int platformX_do_idle(void)
-	{
-		/* tell platformX firmware to enter idle */
-		return 0;
-	}
-
-	static int platformX_cpu_boot(int i)
-	{
-		/* tell platformX firmware to boot CPU i */
-		return 0;
-	}
-
-	static const struct firmware_ops platformX_firmware_ops = {
-		.do_idle        = exynos_do_idle,
-		.cpu_boot       = exynos_cpu_boot,
-		/* other operations not available on platformX */
-	};
-
-	/* init_early callback of machine descriptor */
-	static void __init board_init_early(void)
-	{
-		register_firmware_ops(&platformX_firmware_ops);
-	}
-
-Example of using a firmware operation:
-
-	/* some platform code, e.g. SMP initialization */
-
-	__raw_writel(__pa_symbol(exynos4_secondary_startup),
-		CPU1_BOOT_REG);
-
-	/* Call Exynos specific smc call */
-	if (call_firmware_op(cpu_boot, cpu) == -ENOSYS)
-		cpu_boot_legacy(...); /* Try legacy way */
-
-	gic_raise_softirq(cpumask_of(cpu), 1);