Merge tag 'arc-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc

Pull ARC updates from Vineet Gupta:
 "We have a relatively big changeset for ARC for 4.7.

  The highlight is support for EZChip (now Mellanox) NPS-400 network
  processor, a 400-Gb throughput C-programmable packet processor based
  on ARC700 cores from Synopsys. See

        http://www.mellanox.com/related-docs/prod_npu/PB_NPS-400.pdf

  Also present are irqchip and clocksource drivers for NPS as agreed
  with respective maintainers to go via ARC tree due to an soc header
  dependency.  I have the needed ACKs from Jason, Marc, Daniel.  You
  might run into a trivial merge conflict in drivers/irqchip/*

  This EZChip platform support required some deep changes in ARC
  architecture code and also opportunity to cleanup past sins (legacy
  irq domains, missing irq domain lookup, hard coded timer irqs...)

  Summary:

   - Support for EZChip (now Mellanox) NPS-400 Network processor based
     on ARC700

   - NPS interrupt controller and clocksource drivers

   - ARC timers probed off DT

   - ARC iqrchips switching to linear domain (upgrade from legacy
     domains)"

* tag 'arc-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: (37 commits)
  arc: axs103_smp: Fix CPU frequency to 100MHz for dual-core
  arc: axs10x: Add DT bindings for I2S PLL Clock
  ARC: pae: STRICT_MM_TYPECHECKS was broken
  ARC: Add eznps platform to Kconfig and Makefile
  ARC: [plat-eznps] Use dedicated COMMAND_LINE_SIZE
  ARC: [plat-eznps] Use dedicated cpu_relax()
  ARC: [plat-eznps] Use dedicated identity auxiliary register.
  ARC: [plat-eznps] Use dedicated SMP barriers
  ARC: [plat-eznps] Use dedicated atomic/bitops/cmpxchg
  ARC: [plat-eznps] Use dedicated user stack top
  ARC: [plat-eznps] Add eznps platform
  ARC: [plat-eznps] Add eznps board defconfig and dts
  ARC: Mark secondary cpu online only after all HW setup is done
  ARC: rwlock: disable interrupts in !LLSC variant
  ARC: Make vmalloc size configurable
  ARC: clean out UAPI byteorder.h clean off Kconfig symbol
  irqchip: add nps Internal and external irqchips
  clocksource: Add NPS400 timers driver
  soc: Support for EZchip SoC
  Documentation: Add EZchip vendor to binding list
  ...

1 files changed, 102 insertions, 0 deletions

diff --git a/arch/arc/plat-eznps/platform.c b/arch/arc/plat-eznps/platform.c
new file mode 100644
index 000000000000..7ad6d2b8f12a
--- /dev/null
+++ b/arch/arc/plat-eznps/platform.c
@@ -0,0 +1,102 @@
+/*
+ * Copyright(c) 2015 EZchip Technologies.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ */
+
+#include <linux/init.h>
+#include <linux/io.h>
+#include <asm/mach_desc.h>
+#include <plat/mtm.h>
+
+static void __init eznps_configure_msu(void)
+{
+	int cpu;
+	struct nps_host_reg_msu_en_cfg msu_en_cfg = {.value = 0};
+
+	msu_en_cfg.msu_en = 1;
+	msu_en_cfg.ipi_en = 1;
+	msu_en_cfg.gim_0_en = 1;
+	msu_en_cfg.gim_1_en = 1;
+
+	/* enable IPI and GIM messages on all clusters */
+	for (cpu = 0 ; cpu < eznps_max_cpus; cpu += eznps_cpus_per_cluster)
+		iowrite32be(msu_en_cfg.value,
+			    nps_host_reg(cpu, NPS_MSU_BLKID, NPS_MSU_EN_CFG));
+}
+
+static void __init eznps_configure_gim(void)
+{
+	u32 reg_value;
+	u32 gim_int_lines;
+	struct nps_host_reg_gim_p_int_dst gim_p_int_dst = {.value = 0};
+
+	gim_int_lines = NPS_GIM_UART_LINE;
+	gim_int_lines |= NPS_GIM_DBG_LAN_EAST_TX_DONE_LINE;
+	gim_int_lines |= NPS_GIM_DBG_LAN_EAST_RX_RDY_LINE;
+	gim_int_lines |= NPS_GIM_DBG_LAN_WEST_TX_DONE_LINE;
+	gim_int_lines |= NPS_GIM_DBG_LAN_WEST_RX_RDY_LINE;
+
+	/*
+	 * IRQ polarity
+	 * low or high level
+	 * negative or positive edge
+	 */
+	reg_value = ioread32be(REG_GIM_P_INT_POL_0);
+	reg_value &= ~gim_int_lines;
+	iowrite32be(reg_value, REG_GIM_P_INT_POL_0);
+
+	/* IRQ type level or edge */
+	reg_value = ioread32be(REG_GIM_P_INT_SENS_0);
+	reg_value |= NPS_GIM_DBG_LAN_EAST_TX_DONE_LINE;
+	reg_value |= NPS_GIM_DBG_LAN_WEST_TX_DONE_LINE;
+	iowrite32be(reg_value, REG_GIM_P_INT_SENS_0);
+
+	/*
+	 * GIM interrupt select type for
+	 * dbg_lan TX and RX interrupts
+	 * should be type 1
+	 * type 0 = IRQ line 6
+	 * type 1 = IRQ line 7
+	 */
+	gim_p_int_dst.is = 1;
+	iowrite32be(gim_p_int_dst.value, REG_GIM_P_INT_DST_10);
+	iowrite32be(gim_p_int_dst.value, REG_GIM_P_INT_DST_11);
+	iowrite32be(gim_p_int_dst.value, REG_GIM_P_INT_DST_25);
+	iowrite32be(gim_p_int_dst.value, REG_GIM_P_INT_DST_26);
+
+	/*
+	 * CTOP IRQ lines should be defined
+	 * as blocking in GIM
+	*/
+	iowrite32be(gim_int_lines, REG_GIM_P_INT_BLK_0);
+
+	/* enable CTOP IRQ lines in GIM */
+	iowrite32be(gim_int_lines, REG_GIM_P_INT_EN_0);
+}
+
+static void __init eznps_early_init(void)
+{
+	eznps_configure_msu();
+	eznps_configure_gim();
+}
+
+static const char *eznps_compat[] __initconst = {
+	"ezchip,arc-nps",
+	NULL,
+};
+
+MACHINE_START(NPS, "nps")
+	.dt_compat	= eznps_compat,
+	.init_early	= eznps_early_init,
+MACHINE_END