Merge tag 'soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC-specific updates from Arnd Bergmann:
 "This is a larger set of new functionality for the existing SoC
  families, including:

   - vt8500 gains support for new CPU cores, notably the Cortex-A9 based
     wm8850

   - prima2 gains support for the "marco" SoC family, its SMP based
     cousin

   - tegra gains support for the new Tegra4 (Tegra114) family

   - socfpga now supports a newer version of the hardware including SMP

   - i.mx31 and bcm2835 are now using DT probing for their clocks

   - lots of updates for sh-mobile

   - OMAP updates for clocks, power management and USB

   - i.mx6q and tegra now support cpuidle

   - kirkwood now supports PCIe hot plugging

   - tegra clock support is updated

   - tegra USB PHY probing gets implemented diffently"

* tag 'soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (148 commits)
  ARM: prima2: remove duplicate v7_invalidate_l1
  ARM: shmobile: r8a7779: Correct TMU clock support again
  ARM: prima2: fix __init section for cpu hotplug
  ARM: OMAP: Consolidate OMAP USB-HS platform data (part 3/3)
  ARM: OMAP: Consolidate OMAP USB-HS platform data (part 1/3)
  arm: socfpga: Add SMP support for actual socfpga harware
  arm: Add v7_invalidate_l1 to cache-v7.S
  arm: socfpga: Add entries to enable make dtbs socfpga
  arm: socfpga: Add new device tree source for actual socfpga HW
  ARM: tegra: sort Kconfig selects for Tegra114
  ARM: tegra: enable ARCH_REQUIRE_GPIOLIB for Tegra114
  ARM: tegra: Fix build error w/ ARCH_TEGRA_114_SOC w/o ARCH_TEGRA_3x_SOC
  ARM: tegra: Fix build error for gic update
  ARM: tegra: remove empty tegra_smp_init_cpus()
  ARM: shmobile: Register ARM architected timer
  ARM: MARCO: fix the build issue due to gic-vic-to-irqchip move
  ARM: shmobile: r8a7779: Correct TMU clock support
  ARM: mxs_defconfig: Select CONFIG_DEVTMPFS_MOUNT
  ARM: mxs: decrease mxs_clockevent_device.min_delta_ns to 2 clock cycles
  ARM: mxs: use apbx bus clock to drive the timers on timrotv2
  ...

1 files changed, 154 insertions, 0 deletions

diff --git a/drivers/clk/tegra/clk-super.c b/drivers/clk/tegra/clk-super.c
new file mode 100644
index 00000000000..7ad48a83233
--- /dev/null
+++ b/drivers/clk/tegra/clk-super.c
@@ -0,0 +1,154 @@
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/clk-provider.h>
+#include <linux/clk.h>
+
+#include "clk.h"
+
+#define SUPER_STATE_IDLE 0
+#define SUPER_STATE_RUN 1
+#define SUPER_STATE_IRQ 2
+#define SUPER_STATE_FIQ 3
+
+#define SUPER_STATE_SHIFT 28
+#define SUPER_STATE_MASK ((BIT(SUPER_STATE_IDLE) | BIT(SUPER_STATE_RUN) | \
+			   BIT(SUPER_STATE_IRQ) | BIT(SUPER_STATE_FIQ))	\
+			  << SUPER_STATE_SHIFT)
+
+#define SUPER_LP_DIV2_BYPASS (1 << 16)
+
+#define super_state(s) (BIT(s) << SUPER_STATE_SHIFT)
+#define super_state_to_src_shift(m, s) ((m->width * s))
+#define super_state_to_src_mask(m) (((1 << m->width) - 1))
+
+static u8 clk_super_get_parent(struct clk_hw *hw)
+{
+	struct tegra_clk_super_mux *mux = to_clk_super_mux(hw);
+	u32 val, state;
+	u8 source, shift;
+
+	val = readl_relaxed(mux->reg);
+
+	state = val & SUPER_STATE_MASK;
+
+	BUG_ON((state != super_state(SUPER_STATE_RUN)) &&
+	       (state != super_state(SUPER_STATE_IDLE)));
+	shift = (state == super_state(SUPER_STATE_IDLE)) ?
+		super_state_to_src_shift(mux, SUPER_STATE_IDLE) :
+		super_state_to_src_shift(mux, SUPER_STATE_RUN);
+
+	source = (val >> shift) & super_state_to_src_mask(mux);
+
+	/*
+	 * If LP_DIV2_BYPASS is not set and PLLX is current parent then
+	 * PLLX/2 is the input source to CCLKLP.
+	 */
+	if ((mux->flags & TEGRA_DIVIDER_2) && !(val & SUPER_LP_DIV2_BYPASS) &&
+	    (source == mux->pllx_index))
+		source = mux->div2_index;
+
+	return source;
+}
+
+static int clk_super_set_parent(struct clk_hw *hw, u8 index)
+{
+	struct tegra_clk_super_mux *mux = to_clk_super_mux(hw);
+	u32 val, state;
+	u8 parent_index, shift;
+
+	val = readl_relaxed(mux->reg);
+	state = val & SUPER_STATE_MASK;
+	BUG_ON((state != super_state(SUPER_STATE_RUN)) &&
+	       (state != super_state(SUPER_STATE_IDLE)));
+	shift = (state == super_state(SUPER_STATE_IDLE)) ?
+		super_state_to_src_shift(mux, SUPER_STATE_IDLE) :
+		super_state_to_src_shift(mux, SUPER_STATE_RUN);
+
+	/*
+	 * For LP mode super-clock switch between PLLX direct
+	 * and divided-by-2 outputs is allowed only when other
+	 * than PLLX clock source is current parent.
+	 */
+	if ((mux->flags & TEGRA_DIVIDER_2) && ((index == mux->div2_index) ||
+					       (index == mux->pllx_index))) {
+		parent_index = clk_super_get_parent(hw);
+		if ((parent_index == mux->div2_index) ||
+		    (parent_index == mux->pllx_index))
+			return -EINVAL;
+
+		val ^= SUPER_LP_DIV2_BYPASS;
+		writel_relaxed(val, mux->reg);
+		udelay(2);
+
+		if (index == mux->div2_index)
+			index = mux->pllx_index;
+	}
+	val &= ~((super_state_to_src_mask(mux)) << shift);
+	val |= (index & (super_state_to_src_mask(mux))) << shift;
+
+	writel_relaxed(val, mux->reg);
+	udelay(2);
+	return 0;
+}
+
+const struct clk_ops tegra_clk_super_ops = {
+	.get_parent = clk_super_get_parent,
+	.set_parent = clk_super_set_parent,
+};
+
+struct clk *tegra_clk_register_super_mux(const char *name,
+		const char **parent_names, u8 num_parents,
+		unsigned long flags, void __iomem *reg, u8 clk_super_flags,
+		u8 width, u8 pllx_index, u8 div2_index, spinlock_t *lock)
+{
+	struct tegra_clk_super_mux *super;
+	struct clk *clk;
+	struct clk_init_data init;
+
+	super = kzalloc(sizeof(*super), GFP_KERNEL);
+	if (!super) {
+		pr_err("%s: could not allocate super clk\n", __func__);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	init.name = name;
+	init.ops = &tegra_clk_super_ops;
+	init.flags = flags;
+	init.parent_names = parent_names;
+	init.num_parents = num_parents;
+
+	super->reg = reg;
+	super->pllx_index = pllx_index;
+	super->div2_index = div2_index;
+	super->lock = lock;
+	super->width = width;
+	super->flags = clk_super_flags;
+
+	/* Data in .init is copied by clk_register(), so stack variable OK */
+	super->hw.init = &init;
+
+	clk = clk_register(NULL, &super->hw);
+	if (IS_ERR(clk))
+		kfree(super);
+
+	return clk;
+}