---

yaml
---
r: 217323
b: refs/heads/master
c: 184c82e
h: refs/heads/master
i:
  217321: 46f4f84
  217319: 30c67a6
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: abf0c1bc94cb16f9eed331ea98ac151d08adf4fe
+refs/heads/master: 184c82e853704ee98e729af0f36a8539355c0e2e

trunk/arch/arm/mach-at91/Makefile

@@ -16,7 +16,7 @@ obj-$(CONFIG_ARCH_AT91SAM9261)	+= at91sam9261.o at91sam926x_time.o at91sam9261_d
 obj-$(CONFIG_ARCH_AT91SAM9G10)	+= at91sam9261.o at91sam926x_time.o at91sam9261_devices.o sam9_smc.o
 obj-$(CONFIG_ARCH_AT91SAM9263)	+= at91sam9263.o at91sam926x_time.o at91sam9263_devices.o sam9_smc.o
 obj-$(CONFIG_ARCH_AT91SAM9RL)	+= at91sam9rl.o at91sam926x_time.o at91sam9rl_devices.o sam9_smc.o
-obj-$(CONFIG_ARCH_AT91SAM9G20)	+= at91sam9260.o at91sam926x_time.o at91sam9260_devices.o sam9_smc.o
+obj-$(CONFIG_ARCH_AT91SAM9G20)	+= at91sam9260.o at91sam926x_time.o at91sam9260_devices.o sam9_smc.o at91sam9g20_reset.o
 obj-$(CONFIG_ARCH_AT91SAM9G45)	+= at91sam9g45.o at91sam926x_time.o at91sam9g45_devices.o sam9_smc.o
 obj-$(CONFIG_ARCH_AT91CAP9)	+= at91cap9.o at91sam926x_time.o at91cap9_devices.o sam9_smc.o
 obj-$(CONFIG_ARCH_AT572D940HF)  += at572d940hf.o at91sam926x_time.o at572d940hf_devices.o sam9_smc.o

trunk/arch/arm/mach-at91/at91sam9260.c

@@ -25,6 +25,8 @@
 #include "generic.h"
 #include "clock.h"
 
+extern void at91sam9g20_reset(void);
+
 static struct map_desc at91sam9260_io_desc[] __initdata = {
 	{
 		.virtual	= AT91_VA_BASE_SYS,
@@ -327,7 +329,11 @@ void __init at91sam9260_initialize(unsigned long main_clock)
 	else
 		iotable_init(at91sam9260_sram_desc, ARRAY_SIZE(at91sam9260_sram_desc));
 
-	at91_arch_reset = at91sam9260_reset;
+	if (cpu_is_at91sam9g20())
+		at91_arch_reset = at91sam9g20_reset;
+	else
+		at91_arch_reset = at91sam9260_reset;
+
 	pm_power_off = at91sam9260_poweroff;
 	at91_extern_irq = (1 << AT91SAM9260_ID_IRQ0) | (1 << AT91SAM9260_ID_IRQ1)
 			| (1 << AT91SAM9260_ID_IRQ2);

trunk/arch/arm/mach-at91/at91sam9g20_reset.S

@@ -0,0 +1,55 @@
+/*
+ * reset AT91SAM9G20 as per errata
+ *
+ * (C) BitBox Ltd 2010
+ *
+ * unless the SDRAM is cleanly shutdown before we hit the
+ * reset register it can be left driving the data bus and
+ * killing the chance of a subsequent boot from NAND
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#define CP15_CR_I			(1 << 12)
+
+#define SYS_VIRT_OFS			(-0x01000000)
+
+#define SDRAMC_BASE			(SYS_VIRT_OFS + 0xffffea00)
+#define  SDRAMC_TR			0x0004
+#define  SDRAMC_LPR			0x0010
+#define   SDRAMC_LPCB_POWER_DOWN	2
+
+#define RSTC_BASE			(SYS_VIRT_OFS + 0xfffffd00)
+#define  RSTC_CR			0x0000
+#define   RSTC_PROCRST			(1 << 0)
+#define   RSTC_PERRST			(1 << 2)
+#define   RSTC_KEY			(0xa5 << 24)
+
+			.arm
+
+			.globl	at91sam9g20_reset
+
+at91sam9g20_reset:	mov	r0, #0
+			mcr	p15, 0, r0, c7, c5, 0	@ flush I-cache
+
+			mrc	p15, 0, r0, c1, c0, 0
+			orr	r0, r0, #CP15_CR_I
+			mcr	p15, 0, r0, c1, c0, 0	@ enable I-cache
+
+			ldr	r0, =SDRAMC_BASE	@ preload constants
+			ldr	r1, =RSTC_BASE
+
+			mov	r2, #1
+			mov	r3, #SDRAMC_LPCB_POWER_DOWN
+			ldr	r4, =RSTC_KEY | RSTC_PERRST | RSTC_PROCRST
+
+			.balign	32			@ align to cache line
+
+			str	r2, [r0, #SDRAMC_TR]	@ disable SDRAM access
+			str	r3, [r0, #SDRAMC_LPR]	@ power down SDRAM
+			str	r4, [r1, #RSTC_CR]	@ reset processor
+
+			b	.