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

Pull ARM SoC driver updates from Arnd Bergmann:
 "The most noteworthy SoC driver changes this time include:

   - The TEE subsystem gains an in-kernel interface to access the TEE
     from device drivers.

   - The reset controller subsystem gains a driver for the Qualcomm
     Snapdragon 845 Power Domain Controller.

   - The Xilinx Zynq platform now has a firmware interface for its
     platform management unit. This contains a firmware "ioctl"
     interface that was a little controversial at first, but the version
     we merged solved that by not exposing arbitrary firmware calls to
     user space.

   - The Amlogic Meson platform gains a "canvas" driver that is used for
     video processing and shared between different high-level drivers.

  The rest is more of the usual, mostly related to SoC specific power
  management support and core drivers in drivers/soc:

   - Several Renesas SoCs (RZ/G1N, RZ/G2M, R-Car V3M, RZ/A2M) gain new
     features related to power and reset control.

   - The Mediatek mt8183 and mt6765 SoC platforms gain support for their
     respective power management chips.

   - A new driver for NXP i.MX8, which need a firmware interface for
     power management.

   - The SCPI firmware interface now contains support estimating power
     usage of performance states

   - The NVIDIA Tegra "pmc" driver gains a few new features, in
     particular a pinctrl interface for configuring the pads.

   - Lots of small changes for Qualcomm, in particular the "smem" device
     driver.

   - Some cleanups for the TI OMAP series related to their sysc
     controller.

  Additional cleanups and bugfixes in SoC specific drivers include the
  Meson, Keystone, NXP, AT91, Sunxi, Actions, and Tegra platforms"

* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (129 commits)
  firmware: tegra: bpmp: Implement suspend/resume support
  drivers: clk: Add ZynqMP clock driver
  dt-bindings: clock: Add bindings for ZynqMP clock driver
  firmware: xilinx: Add zynqmp IOCTL API for device control
  Documentation: xilinx: Add documentation for eemi APIs
  MAINTAINERS: imx: include drivers/firmware/imx path
  firmware: imx: add misc svc support
  firmware: imx: add SCU firmware driver support
  reset: Fix potential use-after-free in __of_reset_control_get()
  dt-bindings: arm: fsl: add scu binding doc
  soc: fsl: qbman: add interrupt coalesce changing APIs
  soc: fsl: bman_portals: defer probe after bman's probe
  soc: fsl: qbman: Use last response to determine valid bit
  soc: fsl: qbman: Add 64 bit DMA addressing requirement to QBMan
  soc: fsl: qbman: replace CPU 0 with any online CPU in hotplug handlers
  soc: fsl: qbman: Check if CPU is offline when initializing portals
  reset: qcom: PDC Global (Power Domain Controller) reset controller
  dt-bindings: reset: Add PDC Global binding for SDM845 SoCs
  reset: Grammar s/more then once/more than once/
  bus: ti-sysc: Just use SET_NOIRQ_SYSTEM_SLEEP_PM_OPS
  ...

1 files changed, 141 insertions, 0 deletions

diff --git a/drivers/clk/zynqmp/clk-mux-zynqmp.c b/drivers/clk/zynqmp/clk-mux-zynqmp.c
new file mode 100644
index 000000000000..4143f560c28d
--- /dev/null
+++ b/drivers/clk/zynqmp/clk-mux-zynqmp.c
@@ -0,0 +1,141 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Zynq UltraScale+ MPSoC mux
+ *
+ *  Copyright (C) 2016-2018 Xilinx
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/slab.h>
+#include "clk-zynqmp.h"
+
+/*
+ * DOC: basic adjustable multiplexer clock that cannot gate
+ *
+ * Traits of this clock:
+ * prepare - clk_prepare only ensures that parents are prepared
+ * enable - clk_enable only ensures that parents are enabled
+ * rate - rate is only affected by parent switching.  No clk_set_rate support
+ * parent - parent is adjustable through clk_set_parent
+ */
+
+/**
+ * struct zynqmp_clk_mux - multiplexer clock
+ *
+ * @hw:		handle between common and hardware-specific interfaces
+ * @flags:	hardware-specific flags
+ * @clk_id:	Id of clock
+ */
+struct zynqmp_clk_mux {
+	struct clk_hw hw;
+	u8 flags;
+	u32 clk_id;
+};
+
+#define to_zynqmp_clk_mux(_hw) container_of(_hw, struct zynqmp_clk_mux, hw)
+
+/**
+ * zynqmp_clk_mux_get_parent() - Get parent of clock
+ * @hw:		handle between common and hardware-specific interfaces
+ *
+ * Return: Parent index
+ */
+static u8 zynqmp_clk_mux_get_parent(struct clk_hw *hw)
+{
+	struct zynqmp_clk_mux *mux = to_zynqmp_clk_mux(hw);
+	const char *clk_name = clk_hw_get_name(hw);
+	u32 clk_id = mux->clk_id;
+	u32 val;
+	int ret;
+	const struct zynqmp_eemi_ops *eemi_ops = zynqmp_pm_get_eemi_ops();
+
+	ret = eemi_ops->clock_getparent(clk_id, &val);
+
+	if (ret)
+		pr_warn_once("%s() getparent failed for clock: %s, ret = %d\n",
+			     __func__, clk_name, ret);
+
+	return val;
+}
+
+/**
+ * zynqmp_clk_mux_set_parent() - Set parent of clock
+ * @hw:		handle between common and hardware-specific interfaces
+ * @index:	Parent index
+ *
+ * Return: 0 on success else error+reason
+ */
+static int zynqmp_clk_mux_set_parent(struct clk_hw *hw, u8 index)
+{
+	struct zynqmp_clk_mux *mux = to_zynqmp_clk_mux(hw);
+	const char *clk_name = clk_hw_get_name(hw);
+	u32 clk_id = mux->clk_id;
+	int ret;
+	const struct zynqmp_eemi_ops *eemi_ops = zynqmp_pm_get_eemi_ops();
+
+	ret = eemi_ops->clock_setparent(clk_id, index);
+
+	if (ret)
+		pr_warn_once("%s() set parent failed for clock: %s, ret = %d\n",
+			     __func__, clk_name, ret);
+
+	return ret;
+}
+
+static const struct clk_ops zynqmp_clk_mux_ops = {
+	.get_parent = zynqmp_clk_mux_get_parent,
+	.set_parent = zynqmp_clk_mux_set_parent,
+	.determine_rate = __clk_mux_determine_rate,
+};
+
+static const struct clk_ops zynqmp_clk_mux_ro_ops = {
+	.get_parent = zynqmp_clk_mux_get_parent,
+};
+
+/**
+ * zynqmp_clk_register_mux() - Register a mux table with the clock
+ *			       framework
+ * @name:		Name of this clock
+ * @clk_id:		Id of this clock
+ * @parents:		Name of this clock's parents
+ * @num_parents:	Number of parents
+ * @nodes:		Clock topology node
+ *
+ * Return: clock hardware of the registered clock mux
+ */
+struct clk_hw *zynqmp_clk_register_mux(const char *name, u32 clk_id,
+				       const char * const *parents,
+				       u8 num_parents,
+				       const struct clock_topology *nodes)
+{
+	struct zynqmp_clk_mux *mux;
+	struct clk_hw *hw;
+	struct clk_init_data init;
+	int ret;
+
+	mux = kzalloc(sizeof(*mux), GFP_KERNEL);
+	if (!mux)
+		return ERR_PTR(-ENOMEM);
+
+	init.name = name;
+	if (nodes->type_flag & CLK_MUX_READ_ONLY)
+		init.ops = &zynqmp_clk_mux_ro_ops;
+	else
+		init.ops = &zynqmp_clk_mux_ops;
+	init.flags = nodes->flag;
+	init.parent_names = parents;
+	init.num_parents = num_parents;
+	mux->flags = nodes->type_flag;
+	mux->hw.init = &init;
+	mux->clk_id = clk_id;
+
+	hw = &mux->hw;
+	ret = clk_hw_register(NULL, hw);
+	if (ret) {
+		kfree(hw);
+		hw = ERR_PTR(ret);
+	}
+
+	return hw;
+}
+EXPORT_SYMBOL_GPL(zynqmp_clk_register_mux);