ARM: restart: ixp2000: use new restart hook
Hook these platforms restart code into the new restart hook rather
than using arch_reset().
In doing so, we split out the IXDP2401, IXDP2801 and IXDP2805 platform
specific restart code into their own platform files.
Acked-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-ixp2000/ixdp2x01.c b/arch/arm/mach-ixp2000/ixdp2x01.c
index 61a2867..7632bea 100644
--- a/arch/arm/mach-ixp2000/ixdp2x01.c
+++ b/arch/arm/mach-ixp2000/ixdp2x01.c
@@ -413,6 +413,35 @@
ixdp2x01_uart_init();
}
+static void ixdp2401_restart(char mode, const char *cmd)
+{
+ /*
+ * Reset flash banking register so that we are pointing at
+ * RedBoot bank.
+ */
+ ixp2000_reg_write(IXDP2X01_CPLD_FLASH_REG,
+ ((0 >> IXDP2X01_FLASH_WINDOW_BITS)
+ | IXDP2X01_CPLD_FLASH_INTERN));
+ ixp2000_reg_wrb(IXDP2X01_CPLD_RESET_REG, 0xffffffff);
+
+ ixp2000_restart(mode, cmd);
+}
+
+static void ixdp280x_restart(char mode, const char *cmd)
+{
+ /*
+ * On IXDP2801 we need to write this magic sequence to the CPLD
+ * to cause a complete reset of the CPU and all external devices
+ * and move the flash bank register back to 0.
+ */
+ unsigned long reset_reg = *IXDP2X01_CPLD_RESET_REG;
+
+ reset_reg = 0x55AA0000 | (reset_reg & 0x0000FFFF);
+ ixp2000_reg_write(IXDP2X01_CPLD_RESET_REG, reset_reg);
+ ixp2000_reg_wrb(IXDP2X01_CPLD_RESET_REG, 0x80000000);
+
+ ixp2000_restart(mode, cmd);
+}
#ifdef CONFIG_ARCH_IXDP2401
MACHINE_START(IXDP2401, "Intel IXDP2401 Development Platform")
@@ -422,6 +451,7 @@
.init_irq = ixdp2x01_init_irq,
.timer = &ixdp2x01_timer,
.init_machine = ixdp2x01_init_machine,
+ .restart = ixdp2401_restart,
MACHINE_END
#endif
@@ -433,6 +463,7 @@
.init_irq = ixdp2x01_init_irq,
.timer = &ixdp2x01_timer,
.init_machine = ixdp2x01_init_machine,
+ .restart = ixdp280x_restart,
MACHINE_END
/*
@@ -446,6 +477,7 @@
.init_irq = ixdp2x01_init_irq,
.timer = &ixdp2x01_timer,
.init_machine = ixdp2x01_init_machine,
+ .restart = ixdp280x_restart,
MACHINE_END
#endif