Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

Pull MIPS updates from Ralf Baechle:
 "The whole series has been sitting in -next for quite a while with no
  complaints.  The last change to the series was before the weekend the
  removal of an SPI patch which Grant - even though previously acked by
  himself - appeared to raise objections.  So I removed it until the
  situation is clarified.  Other than that all the patches have the acks
  from their respective maintainers, all MIPS and x86 defconfigs are
  building fine and I'm not aware of any problems introduced by this
  series.

  Among the key features for this patch series is a sizable patchset for
  Lantiq which among other things introduces support for Lantiq's
  flagship product, the FALCON SOC.  It also means that the opensource
  developers behind this patchset have overtaken Lantiq's competing
  inhouse development team that was working behind closed doors.

  Less noteworthy the ath79 patchset which adds support for a few more
  chip variants, cleanups and fixes.  Finally the usual dose of tweaking
  of generic code."

Fix up trivial conflicts in arch/mips/lantiq/xway/gpio_{ebu,stp}.c where
printk spelling fixes clashed with file move and eventual removal of the
printk.

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (81 commits)
  MIPS: lantiq: remove orphaned code
  MIPS: Remove all -Wall and almost all -Werror usage from arch/mips.
  MIPS: lantiq: implement support for FALCON soc
  MTD: MIPS: lantiq: verify that the NOR interface is available on falcon soc
  MTD: MIPS: lantiq: implement OF support
  watchdog: MIPS: lantiq: implement OF support and minor fixes
  SERIAL: MIPS: lantiq: implement OF support
  GPIO: MIPS: lantiq: convert gpio-stp-xway to OF
  GPIO: MIPS: lantiq: convert gpio-mm-lantiq to OF and of_mm_gpio
  GPIO: MIPS: lantiq: move gpio-stp and gpio-ebu to the subsystem folder
  MIPS: pci: convert lantiq driver to OF
  MIPS: lantiq: convert dma to platform driver
  MIPS: lantiq: implement support for clkdev api
  MIPS: lantiq: drop ltq_gpio_request() and gpio_to_irq()
  OF: MIPS: lantiq: implement irq_domain support
  OF: MIPS: lantiq: implement OF support
  MIPS: lantiq: drop mips_machine support
  OF: PCI: const usage needed by MIPS
  MIPS: Cavium: Remove smp_reserve_lock.
  MIPS: Move cache setup to setup_arch().
  ...

1 files changed, 49 insertions, 28 deletions

diff --git a/arch/mips/lantiq/xway/reset.c b/arch/mips/lantiq/xway/reset.c
index 8b66bd87f0c1..22c55f73aa9d 100644
--- a/arch/mips/lantiq/xway/reset.c
+++ b/arch/mips/lantiq/xway/reset.c
@@ -11,26 +11,31 @@
 #include <linux/ioport.h>
 #include <linux/pm.h>
 #include <linux/export.h>
+#include <linux/delay.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+
 #include <asm/reboot.h>
 
 #include <lantiq_soc.h>
 
+#include "../prom.h"
+
 #define ltq_rcu_w32(x, y)	ltq_w32((x), ltq_rcu_membase + (y))
 #define ltq_rcu_r32(x)		ltq_r32(ltq_rcu_membase + (x))
 
-/* register definitions */
-#define LTQ_RCU_RST		0x0010
-#define LTQ_RCU_RST_ALL		0x40000000
-
-#define LTQ_RCU_RST_STAT	0x0014
-#define LTQ_RCU_STAT_SHIFT	26
+/* reset request register */
+#define RCU_RST_REQ		0x0010
+/* reset status register */
+#define RCU_RST_STAT		0x0014
 
-static struct resource ltq_rcu_resource = {
-	.name   = "rcu",
-	.start  = LTQ_RCU_BASE_ADDR,
-	.end    = LTQ_RCU_BASE_ADDR + LTQ_RCU_SIZE - 1,
-	.flags  = IORESOURCE_MEM,
-};
+/* reboot bit */
+#define RCU_RD_SRST		BIT(30)
+/* reset cause */
+#define RCU_STAT_SHIFT		26
+/* boot selection */
+#define RCU_BOOT_SEL_SHIFT	26
+#define RCU_BOOT_SEL_MASK	0x7
 
 /* remapped base addr of the reset control unit */
 static void __iomem *ltq_rcu_membase;
@@ -38,48 +43,64 @@ static void __iomem *ltq_rcu_membase;
 /* This function is used by the watchdog driver */
 int ltq_reset_cause(void)
 {
-	u32 val = ltq_rcu_r32(LTQ_RCU_RST_STAT);
-	return val >> LTQ_RCU_STAT_SHIFT;
+	u32 val = ltq_rcu_r32(RCU_RST_STAT);
+	return val >> RCU_STAT_SHIFT;
 }
 EXPORT_SYMBOL_GPL(ltq_reset_cause);
 
+/* allow platform code to find out what source we booted from */
+unsigned char ltq_boot_select(void)
+{
+	u32 val = ltq_rcu_r32(RCU_RST_STAT);
+	return (val >> RCU_BOOT_SEL_SHIFT) & RCU_BOOT_SEL_MASK;
+}
+
+/* reset a io domain for u micro seconds */
+void ltq_reset_once(unsigned int module, ulong u)
+{
+	ltq_rcu_w32(ltq_rcu_r32(RCU_RST_REQ) | module, RCU_RST_REQ);
+	udelay(u);
+	ltq_rcu_w32(ltq_rcu_r32(RCU_RST_REQ) & ~module, RCU_RST_REQ);
+}
+
 static void ltq_machine_restart(char *command)
 {
-	pr_notice("System restart\n");
 	local_irq_disable();
-	ltq_rcu_w32(ltq_rcu_r32(LTQ_RCU_RST) | LTQ_RCU_RST_ALL, LTQ_RCU_RST);
+	ltq_rcu_w32(ltq_rcu_r32(RCU_RST_REQ) | RCU_RD_SRST, RCU_RST_REQ);
 	unreachable();
 }
 
 static void ltq_machine_halt(void)
 {
-	pr_notice("System halted.\n");
 	local_irq_disable();
 	unreachable();
 }
 
 static void ltq_machine_power_off(void)
 {
-	pr_notice("Please turn off the power now.\n");
 	local_irq_disable();
 	unreachable();
 }
 
 static int __init mips_reboot_setup(void)
 {
-	/* insert and request the memory region */
-	if (insert_resource(&iomem_resource, &ltq_rcu_resource) < 0)
-		panic("Failed to insert rcu memory");
+	struct resource res;
+	struct device_node *np =
+		of_find_compatible_node(NULL, NULL, "lantiq,rcu-xway");
+
+	/* check if all the reset register range is available */
+	if (!np)
+		panic("Failed to load reset resources from devicetree");
+
+	if (of_address_to_resource(np, 0, &res))
+		panic("Failed to get rcu memory range");
 
-	if (request_mem_region(ltq_rcu_resource.start,
-			resource_size(&ltq_rcu_resource), "rcu") < 0)
-		panic("Failed to request rcu memory");
+	if (request_mem_region(res.start, resource_size(&res), res.name) < 0)
+		pr_err("Failed to request rcu memory");
 
-	/* remap rcu register range */
-	ltq_rcu_membase = ioremap_nocache(ltq_rcu_resource.start,
-				resource_size(&ltq_rcu_resource));
+	ltq_rcu_membase = ioremap_nocache(res.start, resource_size(&res));
 	if (!ltq_rcu_membase)
-		panic("Failed to remap rcu memory");
+		panic("Failed to remap core memory");
 
 	_machine_restart = ltq_machine_restart;
 	_machine_halt = ltq_machine_halt;