Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux

Pull clk updates from Stephen Boyd:
 "It's the usual big pile of driver updates and additions, but we do
  have a couple core changes in here as well.

  Core:

   - CLK_IS_CRITICAL support has been added.  This should allow drivers
     to properly express that a certain clk should stay on even if their
     prepare/enable count drops to 0 (and in turn the parents of these
     clks should stay enabled).

   - A clk registration API has been added, clk_hw_register(), and an OF
     clk provider API has been added, of_clk_add_hw_provider().  These
     APIs have been put in place to further split clk providers from clk
     consumers, with the goal being to have clk providers never deal
     with struct clk pointers at all.  Conversion of provider drivers is
     on going.  clkdev has also gained support for registering clk_hw
     pointers directly so we can convert drivers that don't use
     devicetree.

  New Drivers:

   - Marvell ap806 and cp110 system controllers (with clks inside!)
   - Hisilicon Hi3519 clock and reset controller
   - Axis ARTPEC-6 clock controllers
   - Oxford Semiconductor OXNAS clock controllers
   - AXS10X I2S PLL
   - Rockchip RK3399 clock and reset controller

  Updates:

   - MMC2 and UART2 clks on Samsung Exynos 3250, ACLK on Samsung Exynos
     542x SoCs, and some more clk ID exporting for bus frequency scaling
   - Proper BCM2835 PCM clk support and various other clks
   - i.MX clk updates for i.MX6SX, i.MX7, and VF610
   - Renesas updates for R-Car H3
   - Tegra210 got updates for DisplayPort and HDMI 2.0
   - Rockchip driver refactorings and fixes due to adding RK3399 support"

* tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (139 commits)
  clk: fix critical clock locking
  clk: qcom: mmcc-8996: Remove clocks that should be controlled by RPM
  clk: ingenic: Allow divider value to be divided
  clk: sunxi: Add display and TCON0 clocks driver
  clk: rockchip: drop old_rate calculation on pll rate changes
  clk: rockchip: simplify GRF handling in pll clocks
  clk: rockchip: lookup General Register Files in rockchip_clk_init
  clk: rockchip: fix the rk3399 sdmmc sample / drv name
  clk: mvebu: new driver for Armada CP110 system controller
  dt-bindings: arm: add DT binding for Marvell CP110 system controller
  clk: mvebu: new driver for Armada AP806 system controller
  clk: hisilicon: add CRG driver for hi3519 soc
  clk: hisilicon: export some hisilicon APIs to modules
  reset: hisilicon: add reset controller driver for hisilicon SOCs
  clk: bcm/kona: Do not use sizeof on pointer type
  clk: qcom: msm8916: Fix crypto clock flags
  clk: nxp: lpc18xx: Initialize clk_init_data::flags to 0
  clk/axs10x: Add I2S PLL clock driver
  clk: imx7d: fix ahb clock mux 1
  clk: fix comment of devm_clk_hw_register()
  ...

1 files changed, 120 insertions, 0 deletions

diff --git a/drivers/clk/tegra/clk-periph-fixed.c b/drivers/clk/tegra/clk-periph-fixed.c
new file mode 100644
index 000000000000..c57dfb037b10
--- /dev/null
+++ b/drivers/clk/tegra/clk-periph-fixed.c
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2015, 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/clk-provider.h>
+
+#include "clk.h"
+
+static inline struct tegra_clk_periph_fixed *
+to_tegra_clk_periph_fixed(struct clk_hw *hw)
+{
+	return container_of(hw, struct tegra_clk_periph_fixed, hw);
+}
+
+static int tegra_clk_periph_fixed_is_enabled(struct clk_hw *hw)
+{
+	struct tegra_clk_periph_fixed *fixed = to_tegra_clk_periph_fixed(hw);
+	u32 mask = 1 << (fixed->num % 32), value;
+
+	value = readl(fixed->base + fixed->regs->enb_reg);
+	if (value & mask) {
+		value = readl(fixed->base + fixed->regs->rst_reg);
+		if ((value & mask) == 0)
+			return 1;
+	}
+
+	return 0;
+}
+
+static int tegra_clk_periph_fixed_enable(struct clk_hw *hw)
+{
+	struct tegra_clk_periph_fixed *fixed = to_tegra_clk_periph_fixed(hw);
+	u32 mask = 1 << (fixed->num % 32);
+
+	writel(mask, fixed->base + fixed->regs->enb_set_reg);
+
+	return 0;
+}
+
+static void tegra_clk_periph_fixed_disable(struct clk_hw *hw)
+{
+	struct tegra_clk_periph_fixed *fixed = to_tegra_clk_periph_fixed(hw);
+	u32 mask = 1 << (fixed->num % 32);
+
+	writel(mask, fixed->base + fixed->regs->enb_clr_reg);
+}
+
+static unsigned long
+tegra_clk_periph_fixed_recalc_rate(struct clk_hw *hw,
+				   unsigned long parent_rate)
+{
+	struct tegra_clk_periph_fixed *fixed = to_tegra_clk_periph_fixed(hw);
+	unsigned long long rate;
+
+	rate = (unsigned long long)parent_rate * fixed->mul;
+	do_div(rate, fixed->div);
+
+	return (unsigned long)rate;
+}
+
+static const struct clk_ops tegra_clk_periph_fixed_ops = {
+	.is_enabled = tegra_clk_periph_fixed_is_enabled,
+	.enable = tegra_clk_periph_fixed_enable,
+	.disable = tegra_clk_periph_fixed_disable,
+	.recalc_rate = tegra_clk_periph_fixed_recalc_rate,
+};
+
+struct clk *tegra_clk_register_periph_fixed(const char *name,
+					    const char *parent,
+					    unsigned long flags,
+					    void __iomem *base,
+					    unsigned int mul,
+					    unsigned int div,
+					    unsigned int num)
+{
+	const struct tegra_clk_periph_regs *regs;
+	struct tegra_clk_periph_fixed *fixed;
+	struct clk_init_data init;
+	struct clk *clk;
+
+	regs = get_reg_bank(num);
+	if (!regs)
+		return ERR_PTR(-EINVAL);
+
+	fixed = kzalloc(sizeof(*fixed), GFP_KERNEL);
+	if (!fixed)
+		return ERR_PTR(-ENOMEM);
+
+	init.name = name;
+	init.flags = flags;
+	init.parent_names = parent ? &parent : NULL;
+	init.num_parents = parent ? 1 : 0;
+	init.ops = &tegra_clk_periph_fixed_ops;
+
+	fixed->base = base;
+	fixed->regs = regs;
+	fixed->mul = mul;
+	fixed->div = div;
+	fixed->num = num;
+
+	fixed->hw.init = &init;
+
+	clk = clk_register(NULL, &fixed->hw);
+	if (IS_ERR(clk))
+		kfree(fixed);
+
+	return clk;
+}