Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Fix error output of boot instance creation failure

   Currently if a boot instance creation fails, instead of printing out
   the name of the instance that failed, it prints "(null)". That is
   because it prints "cur_str" that had already been processed by
   strsep(). Print the saved name instead.

   While at it, print the error code of the failure.

 - Fix use-after-free for same named historgrams

   Histograms can be named so that they can be used in multiple events.
   But if the named histogram has a variable attached, the second event
   that uses the named histogram which duplicates it and needs to free
   the original after duplication leaves the old variable in place and
   still visible. If another histogram uses than variable, it will use
   the stale one which will try to reference the freed duplicate
   histogram and crash the kernel.

   Free the duplicate variables along with the duplicated histogram
   data.

 - Check return value of kthread_run() in event self test

   The events self tests uses a kthread for testing but does not check
   if it succeeded in creating a kthread. If the kthread creation were
   to fail, the code will still try to call kthread_stop() on the error
   returned.

 - Fix race between reading trace_pipe and updating subbuffer size

   If a user is reading the trace_pipe file at the same time they update
   the ring buffer sub-buffer size, can cause the trace_pipe read to
   read stale data. Add trace_access_lock() around updating the ring
   buffer sub-buffer size.

 - Fix eventfs_inode on failure path in creation of the events directory

   In the creation of the "events" directory, if after allocating the
   eventfs_inode a failure is detected, it calls cleanup_ei() which
   calls free_ei(). The free_ei() will test if eventfs_inode being freed
   has no children. It is a bug if it does. But on the failure case of
   the creation of the "events" directory, the children lists have not
   yet been initialized and the free will trigger a warning because
   list_empty() on an uninitialized list returns false.

   Move the initialization into init_ei() where it makes more sense and
   makes sure that a created eventfs_inode has its lists initialized
   upon creation.

 - Check return value of kthread_run() in ftrace direct sample code

   The sample code that shows how to use the ftrace direct calls does
   not test the return of kthread_run() to see if it succeeds. Return a
   failure if the kthread_run() doesn't succeed.

 - Clear user events state on fork in case of alloc failure

   On fork, the child gets a pointer to the parent's user events state.
   It makes a copy of it then updates the child's pointer to it. But if
   the allocation fails, the duplication function leaves the child with
   a pointer to its parent's descriptor. When the child cleans up its
   data, it will free the parent's descriptor while the parent is still
   using it.

   In the duplication function, set the child's user_event_mm to NULL
   before testing if the allocation succeeded, and when it exits it will
   not free the parent's descriptor.

 - Fix retry exhaustion in simple ring buffer reader swap

   simple_ring_buffer_swap_reader_page() starts with retry set to 8 and
   post-decrements it only after a failed link replacement. On the final
   attempt, a successful replacement leaves retry at zero, while a
   failed replacement leaves it at -1.

   But the check for success expects the retry value to be non-zero and
   exits with an error on zero. This is the opposite result. Fix it.

 - Fail nicely when the remote swap_reader_page() returns an error

   Currently, if the swap_reader_page() of a remote buffer fails, it
   triggers a WARN_ON_ONCE() and continues normally. Instead, have it
   exit with an error and a pr_warn() print instead of a full WARNING.

* tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ring-buffer: Stop remote reader update when page swap fails
  tracing: Fix retry exhaustion in simple ring buffer reader swap
  tracing/user_events: Clear copied tracing state before fork duplication
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify
  eventfs: Initialize ei->children and ei->list in init_ei()
  tracing: Fix use-after-free in trace_pipe read on sub-buffer order change
  tracing: Fix crash passing ERR_PTR to kthread_stop()
  tracing: Fix use-after-free with same-name named triggers
  tracing: Fix logged instance name on creation failure

1 files changed, 358 insertions, 0 deletions

diff --git a/drivers/pinctrl/pinctrl-pef2256.c b/drivers/pinctrl/pinctrl-pef2256.c
new file mode 100644
index 000000000..868ea33be
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-pef2256.c
@@ -0,0 +1,358 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * PEF2256 also known as FALC56 driver
+ *
+ * Copyright 2023 CS GROUP France
+ *
+ * Author: Herve Codina <herve.codina@bootlin.com>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/framer/pef2256.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+/* Port Configuration 1..4 */
+#define PEF2256_PC1		  0x80
+#define PEF2256_PC2		  0x81
+#define PEF2256_PC3		  0x82
+#define PEF2256_PC4		  0x83
+#define PEF2256_12_PC_RPC_MASK	  GENMASK(6, 4)
+#define PEF2256_12_PC_RPC_SYPR	  FIELD_PREP_CONST(PEF2256_12_PC_RPC_MASK, 0x0)
+#define PEF2256_12_PC_RPC_RFM	  FIELD_PREP_CONST(PEF2256_12_PC_RPC_MASK, 0x1)
+#define PEF2256_12_PC_RPC_RFMB	  FIELD_PREP_CONST(PEF2256_12_PC_RPC_MASK, 0x2)
+#define PEF2256_12_PC_RPC_RSIGM	  FIELD_PREP_CONST(PEF2256_12_PC_RPC_MASK, 0x3)
+#define PEF2256_12_PC_RPC_RSIG	  FIELD_PREP_CONST(PEF2256_12_PC_RPC_MASK, 0x4)
+#define PEF2256_12_PC_RPC_DLR	  FIELD_PREP_CONST(PEF2256_12_PC_RPC_MASK, 0x5)
+#define PEF2256_12_PC_RPC_FREEZE  FIELD_PREP_CONST(PEF2256_12_PC_RPC_MASK, 0x6)
+#define PEF2256_12_PC_RPC_RFSP	  FIELD_PREP_CONST(PEF2256_12_PC_RPC_MASK, 0x7)
+#define PEF2256_12_PC_XPC_MASK    GENMASK(4, 0)
+#define PEF2256_12_PC_XPC_SYPX	  FIELD_PREP_CONST(PEF2256_12_PC_XPC_MASK, 0x0)
+#define PEF2256_12_PC_XPC_XFMS	  FIELD_PREP_CONST(PEF2256_12_PC_XPC_MASK, 0x1)
+#define PEF2256_12_PC_XPC_XSIG	  FIELD_PREP_CONST(PEF2256_12_PC_XPC_MASK, 0x2)
+#define PEF2256_12_PC_XPC_TCLK	  FIELD_PREP_CONST(PEF2256_12_PC_XPC_MASK, 0x3)
+#define PEF2256_12_PC_XPC_XMFB	  FIELD_PREP_CONST(PEF2256_12_PC_XPC_MASK, 0x4)
+#define PEF2256_12_PC_XPC_XSIGM	  FIELD_PREP_CONST(PEF2256_12_PC_XPC_MASK, 0x5)
+#define PEF2256_12_PC_XPC_DLX	  FIELD_PREP_CONST(PEF2256_12_PC_XPC_MASK, 0x6)
+#define PEF2256_12_PC_XPC_XCLK	  FIELD_PREP_CONST(PEF2256_12_PC_XPC_MASK, 0x7)
+#define PEF2256_12_PC_XPC_XLT	  FIELD_PREP_CONST(PEF2256_12_PC_XPC_MASK, 0x8)
+#define PEF2256_2X_PC_RPC_MASK	  GENMASK(7, 4)
+#define PEF2256_2X_PC_RPC_SYPR	  FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0x0)
+#define PEF2256_2X_PC_RPC_RFM	  FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0x1)
+#define PEF2256_2X_PC_RPC_RFMB	  FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0x2)
+#define PEF2256_2X_PC_RPC_RSIGM	  FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0x3)
+#define PEF2256_2X_PC_RPC_RSIG	  FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0x4)
+#define PEF2256_2X_PC_RPC_DLR	  FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0x5)
+#define PEF2256_2X_PC_RPC_FREEZE  FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0x6)
+#define PEF2256_2X_PC_RPC_RFSP	  FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0x7)
+#define PEF2256_2X_PC_RPC_GPI	  FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0x9)
+#define PEF2256_2X_PC_RPC_GPOH	  FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0xa)
+#define PEF2256_2X_PC_RPC_GPOL	  FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0xb)
+#define PEF2256_2X_PC_RPC_LOS	  FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0xc)
+#define PEF2256_2X_PC_XPC_MASK	  GENMASK(3, 0)
+#define PEF2256_2X_PC_XPC_SYPX	  FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0x0)
+#define PEF2256_2X_PC_XPC_XFMS	  FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0x1)
+#define PEF2256_2X_PC_XPC_XSIG	  FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0x2)
+#define PEF2256_2X_PC_XPC_TCLK	  FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0x3)
+#define PEF2256_2X_PC_XPC_XMFB	  FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0x4)
+#define PEF2256_2X_PC_XPC_XSIGM	  FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0x5)
+#define PEF2256_2X_PC_XPC_DLX	  FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0x6)
+#define PEF2256_2X_PC_XPC_XCLK	  FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0x7)
+#define PEF2256_2X_PC_XPC_XLT	  FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0x8)
+#define PEF2256_2X_PC_XPC_GPI	  FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0x9)
+#define PEF2256_2X_PC_XPC_GPOH	  FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0xa)
+#define PEF2256_2X_PC_XPC_GPOL	  FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0xb)
+
+struct pef2256_pinreg_desc {
+	int offset;
+	u8 mask;
+};
+
+struct pef2256_function_desc {
+	const char *name;
+	const char * const*groups;
+	unsigned int ngroups;
+	u8 func_val;
+};
+
+struct pef2256_pinctrl {
+	struct device *dev;
+	struct regmap *regmap;
+	enum pef2256_version version;
+	struct pinctrl_desc pctrl_desc;
+	const struct pef2256_function_desc *functions;
+	unsigned int nfunctions;
+};
+
+static int pef2256_get_groups_count(struct pinctrl_dev *pctldev)
+{
+	struct pef2256_pinctrl *pef2256 = pinctrl_dev_get_drvdata(pctldev);
+
+	/* We map 1 group <-> 1 pin */
+	return pef2256->pctrl_desc.npins;
+}
+
+static const char *pef2256_get_group_name(struct pinctrl_dev *pctldev,
+					  unsigned int selector)
+{
+	struct pef2256_pinctrl *pef2256 = pinctrl_dev_get_drvdata(pctldev);
+
+	/* We map 1 group <-> 1 pin */
+	return pef2256->pctrl_desc.pins[selector].name;
+}
+
+static int pef2256_get_group_pins(struct pinctrl_dev *pctldev, unsigned int selector,
+				  const unsigned int **pins,
+				  unsigned int *num_pins)
+{
+	struct pef2256_pinctrl *pef2256 = pinctrl_dev_get_drvdata(pctldev);
+
+	/* We map 1 group <-> 1 pin */
+	*pins = &pef2256->pctrl_desc.pins[selector].number;
+	*num_pins = 1;
+
+	return 0;
+}
+
+static const struct pinctrl_ops pef2256_pctlops = {
+	.get_groups_count	= pef2256_get_groups_count,
+	.get_group_name		= pef2256_get_group_name,
+	.get_group_pins		= pef2256_get_group_pins,
+	.dt_node_to_map		= pinconf_generic_dt_node_to_map_pin,
+	.dt_free_map		= pinconf_generic_dt_free_map,
+};
+
+static int pef2256_get_functions_count(struct pinctrl_dev *pctldev)
+{
+	struct pef2256_pinctrl *pef2256 = pinctrl_dev_get_drvdata(pctldev);
+
+	return pef2256->nfunctions;
+}
+
+static const char *pef2256_get_function_name(struct pinctrl_dev *pctldev,
+					     unsigned int selector)
+{
+	struct pef2256_pinctrl *pef2256 = pinctrl_dev_get_drvdata(pctldev);
+
+	return pef2256->functions[selector].name;
+}
+
+static int pef2256_get_function_groups(struct pinctrl_dev *pctldev, unsigned int selector,
+				       const char * const **groups,
+				       unsigned * const num_groups)
+{
+	struct pef2256_pinctrl *pef2256 = pinctrl_dev_get_drvdata(pctldev);
+
+	*groups = pef2256->functions[selector].groups;
+	*num_groups = pef2256->functions[selector].ngroups;
+	return 0;
+}
+
+static int pef2256_set_mux(struct pinctrl_dev *pctldev, unsigned int func_selector,
+			   unsigned int group_selector)
+{
+	struct pef2256_pinctrl *pef2256 = pinctrl_dev_get_drvdata(pctldev);
+	const struct pef2256_pinreg_desc *pinreg_desc;
+	u8 func_val;
+
+	/* We map 1 group <-> 1 pin */
+	pinreg_desc = pef2256->pctrl_desc.pins[group_selector].drv_data;
+	func_val = pef2256->functions[func_selector].func_val;
+
+	return regmap_update_bits(pef2256->regmap, pinreg_desc->offset,
+				  pinreg_desc->mask, func_val);
+}
+
+static const struct pinmux_ops pef2256_pmxops = {
+	.get_functions_count	= pef2256_get_functions_count,
+	.get_function_name	= pef2256_get_function_name,
+	.get_function_groups	= pef2256_get_function_groups,
+	.set_mux		= pef2256_set_mux,
+};
+
+#define PEF2256_PINCTRL_PIN(_number, _name, _offset, _mask) { \
+	.number = _number, \
+	.name = _name, \
+	.drv_data = &(struct pef2256_pinreg_desc) { \
+		.offset = _offset, \
+		.mask = _mask, \
+	}, \
+}
+
+static const struct pinctrl_pin_desc pef2256_v12_pins[] = {
+	PEF2256_PINCTRL_PIN(0, "RPA", PEF2256_PC1, PEF2256_12_PC_RPC_MASK),
+	PEF2256_PINCTRL_PIN(1, "RPB", PEF2256_PC2, PEF2256_12_PC_RPC_MASK),
+	PEF2256_PINCTRL_PIN(2, "RPC", PEF2256_PC3, PEF2256_12_PC_RPC_MASK),
+	PEF2256_PINCTRL_PIN(3, "RPD", PEF2256_PC4, PEF2256_12_PC_RPC_MASK),
+	PEF2256_PINCTRL_PIN(4, "XPA", PEF2256_PC1, PEF2256_12_PC_XPC_MASK),
+	PEF2256_PINCTRL_PIN(5, "XPB", PEF2256_PC2, PEF2256_12_PC_XPC_MASK),
+	PEF2256_PINCTRL_PIN(6, "XPC", PEF2256_PC3, PEF2256_12_PC_XPC_MASK),
+	PEF2256_PINCTRL_PIN(7, "XPD", PEF2256_PC4, PEF2256_12_PC_XPC_MASK),
+};
+
+static const struct pinctrl_pin_desc pef2256_v2x_pins[] = {
+	PEF2256_PINCTRL_PIN(0, "RPA", PEF2256_PC1, PEF2256_2X_PC_RPC_MASK),
+	PEF2256_PINCTRL_PIN(1, "RPB", PEF2256_PC2, PEF2256_2X_PC_RPC_MASK),
+	PEF2256_PINCTRL_PIN(2, "RPC", PEF2256_PC3, PEF2256_2X_PC_RPC_MASK),
+	PEF2256_PINCTRL_PIN(3, "RPD", PEF2256_PC4, PEF2256_2X_PC_RPC_MASK),
+	PEF2256_PINCTRL_PIN(4, "XPA", PEF2256_PC1, PEF2256_2X_PC_XPC_MASK),
+	PEF2256_PINCTRL_PIN(5, "XPB", PEF2256_PC2, PEF2256_2X_PC_XPC_MASK),
+	PEF2256_PINCTRL_PIN(6, "XPC", PEF2256_PC3, PEF2256_2X_PC_XPC_MASK),
+	PEF2256_PINCTRL_PIN(7, "XPD", PEF2256_PC4, PEF2256_2X_PC_XPC_MASK),
+};
+
+static const char *const pef2256_rp_groups[] = { "RPA", "RPB", "RPC", "RPD" };
+static const char *const pef2256_xp_groups[] = { "XPA", "XPB", "XPC", "XPD" };
+static const char *const pef2256_all_groups[] = { "RPA", "RPB", "RPC", "RPD",
+						  "XPA", "XPB", "XPC", "XPD" };
+
+#define PEF2256_FUNCTION(_name, _func_val, _groups) { \
+	.name = _name, \
+	.groups = _groups, \
+	.ngroups = ARRAY_SIZE(_groups), \
+	.func_val = _func_val, \
+}
+
+static const struct pef2256_function_desc pef2256_v2x_functions[] = {
+	PEF2256_FUNCTION("SYPR",   PEF2256_2X_PC_RPC_SYPR,   pef2256_rp_groups),
+	PEF2256_FUNCTION("RFM",    PEF2256_2X_PC_RPC_RFM,    pef2256_rp_groups),
+	PEF2256_FUNCTION("RFMB",   PEF2256_2X_PC_RPC_RFMB,   pef2256_rp_groups),
+	PEF2256_FUNCTION("RSIGM",  PEF2256_2X_PC_RPC_RSIGM,  pef2256_rp_groups),
+	PEF2256_FUNCTION("RSIG",   PEF2256_2X_PC_RPC_RSIG,   pef2256_rp_groups),
+	PEF2256_FUNCTION("DLR",    PEF2256_2X_PC_RPC_DLR,    pef2256_rp_groups),
+	PEF2256_FUNCTION("FREEZE", PEF2256_2X_PC_RPC_FREEZE, pef2256_rp_groups),
+	PEF2256_FUNCTION("RFSP",   PEF2256_2X_PC_RPC_RFSP,   pef2256_rp_groups),
+	PEF2256_FUNCTION("LOS",    PEF2256_2X_PC_RPC_LOS,    pef2256_rp_groups),
+
+	PEF2256_FUNCTION("SYPX",  PEF2256_2X_PC_XPC_SYPX,  pef2256_xp_groups),
+	PEF2256_FUNCTION("XFMS",  PEF2256_2X_PC_XPC_XFMS,  pef2256_xp_groups),
+	PEF2256_FUNCTION("XSIG",  PEF2256_2X_PC_XPC_XSIG,  pef2256_xp_groups),
+	PEF2256_FUNCTION("TCLK",  PEF2256_2X_PC_XPC_TCLK,  pef2256_xp_groups),
+	PEF2256_FUNCTION("XMFB",  PEF2256_2X_PC_XPC_XMFB,  pef2256_xp_groups),
+	PEF2256_FUNCTION("XSIGM", PEF2256_2X_PC_XPC_XSIGM, pef2256_xp_groups),
+	PEF2256_FUNCTION("DLX",   PEF2256_2X_PC_XPC_DLX,   pef2256_xp_groups),
+	PEF2256_FUNCTION("XCLK",  PEF2256_2X_PC_XPC_XCLK,  pef2256_xp_groups),
+	PEF2256_FUNCTION("XLT",   PEF2256_2X_PC_XPC_XLT,   pef2256_xp_groups),
+
+	PEF2256_FUNCTION("GPI",  PEF2256_2X_PC_RPC_GPI | PEF2256_2X_PC_XPC_GPI,
+			 pef2256_all_groups),
+	PEF2256_FUNCTION("GPOH", PEF2256_2X_PC_RPC_GPOH | PEF2256_2X_PC_XPC_GPOH,
+			 pef2256_all_groups),
+	PEF2256_FUNCTION("GPOL", PEF2256_2X_PC_RPC_GPOL | PEF2256_2X_PC_XPC_GPOL,
+			 pef2256_all_groups),
+};
+
+static const struct pef2256_function_desc pef2256_v12_functions[] = {
+	PEF2256_FUNCTION("SYPR",   PEF2256_12_PC_RPC_SYPR,   pef2256_rp_groups),
+	PEF2256_FUNCTION("RFM",    PEF2256_12_PC_RPC_RFM,    pef2256_rp_groups),
+	PEF2256_FUNCTION("RFMB",   PEF2256_12_PC_RPC_RFMB,   pef2256_rp_groups),
+	PEF2256_FUNCTION("RSIGM",  PEF2256_12_PC_RPC_RSIGM,  pef2256_rp_groups),
+	PEF2256_FUNCTION("RSIG",   PEF2256_12_PC_RPC_RSIG,   pef2256_rp_groups),
+	PEF2256_FUNCTION("DLR",    PEF2256_12_PC_RPC_DLR,    pef2256_rp_groups),
+	PEF2256_FUNCTION("FREEZE", PEF2256_12_PC_RPC_FREEZE, pef2256_rp_groups),
+	PEF2256_FUNCTION("RFSP",   PEF2256_12_PC_RPC_RFSP,   pef2256_rp_groups),
+
+	PEF2256_FUNCTION("SYPX",  PEF2256_12_PC_XPC_SYPX,  pef2256_xp_groups),
+	PEF2256_FUNCTION("XFMS",  PEF2256_12_PC_XPC_XFMS,  pef2256_xp_groups),
+	PEF2256_FUNCTION("XSIG",  PEF2256_12_PC_XPC_XSIG,  pef2256_xp_groups),
+	PEF2256_FUNCTION("TCLK",  PEF2256_12_PC_XPC_TCLK,  pef2256_xp_groups),
+	PEF2256_FUNCTION("XMFB",  PEF2256_12_PC_XPC_XMFB,  pef2256_xp_groups),
+	PEF2256_FUNCTION("XSIGM", PEF2256_12_PC_XPC_XSIGM, pef2256_xp_groups),
+	PEF2256_FUNCTION("DLX",   PEF2256_12_PC_XPC_DLX,   pef2256_xp_groups),
+	PEF2256_FUNCTION("XCLK",  PEF2256_12_PC_XPC_XCLK,  pef2256_xp_groups),
+	PEF2256_FUNCTION("XLT",   PEF2256_12_PC_XPC_XLT,   pef2256_xp_groups),
+};
+
+static int pef2256_register_pinctrl(struct pef2256_pinctrl *pef2256)
+{
+	struct pinctrl_dev	*pctrl;
+
+	pef2256->pctrl_desc.name    = dev_name(pef2256->dev);
+	pef2256->pctrl_desc.owner   = THIS_MODULE;
+	pef2256->pctrl_desc.pctlops = &pef2256_pctlops;
+	pef2256->pctrl_desc.pmxops  = &pef2256_pmxops;
+	if (pef2256->version == PEF2256_VERSION_1_2) {
+		pef2256->pctrl_desc.pins  = pef2256_v12_pins;
+		pef2256->pctrl_desc.npins = ARRAY_SIZE(pef2256_v12_pins);
+		pef2256->functions  = pef2256_v12_functions;
+		pef2256->nfunctions = ARRAY_SIZE(pef2256_v12_functions);
+	} else {
+		pef2256->pctrl_desc.pins  = pef2256_v2x_pins;
+		pef2256->pctrl_desc.npins = ARRAY_SIZE(pef2256_v2x_pins);
+		pef2256->functions  = pef2256_v2x_functions;
+		pef2256->nfunctions = ARRAY_SIZE(pef2256_v2x_functions);
+	}
+
+	pctrl = devm_pinctrl_register(pef2256->dev, &pef2256->pctrl_desc, pef2256);
+	if (IS_ERR(pctrl))
+		return dev_err_probe(pef2256->dev, PTR_ERR(pctrl),
+				     "pinctrl driver registration failed\n");
+
+	return 0;
+}
+
+static void pef2256_reset_pinmux(struct pef2256_pinctrl *pef2256)
+{
+	u8 val;
+	/*
+	 * Reset values cannot be used.
+	 * They define the SYPR/SYPX pin mux for all the RPx and XPx pins and
+	 * Only one pin can be muxed to SYPR and one pin can be muxed to SYPX.
+	 * Choose here an other reset value.
+	 */
+	if (pef2256->version == PEF2256_VERSION_1_2)
+		val = PEF2256_12_PC_XPC_XCLK | PEF2256_12_PC_RPC_RFSP;
+	else
+		val = PEF2256_2X_PC_XPC_GPI | PEF2256_2X_PC_RPC_GPI;
+
+	regmap_write(pef2256->regmap, PEF2256_PC1, val);
+	regmap_write(pef2256->regmap, PEF2256_PC2, val);
+	regmap_write(pef2256->regmap, PEF2256_PC3, val);
+	regmap_write(pef2256->regmap, PEF2256_PC4, val);
+}
+
+static int pef2256_pinctrl_probe(struct platform_device *pdev)
+{
+	struct pef2256_pinctrl *pef2256_pinctrl;
+	struct pef2256 *pef2256;
+	int ret;
+
+	pef2256_pinctrl = devm_kzalloc(&pdev->dev, sizeof(*pef2256_pinctrl), GFP_KERNEL);
+	if (!pef2256_pinctrl)
+		return -ENOMEM;
+
+	device_set_node(&pdev->dev, dev_fwnode(pdev->dev.parent));
+
+	pef2256 = dev_get_drvdata(pdev->dev.parent);
+
+	pef2256_pinctrl->dev = &pdev->dev;
+	pef2256_pinctrl->regmap = pef2256_get_regmap(pef2256);
+	pef2256_pinctrl->version = pef2256_get_version(pef2256);
+
+	platform_set_drvdata(pdev, pef2256_pinctrl);
+
+	pef2256_reset_pinmux(pef2256_pinctrl);
+	ret = pef2256_register_pinctrl(pef2256_pinctrl);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static struct platform_driver pef2256_pinctrl_driver = {
+	.driver = {
+		.name = "lantiq-pef2256-pinctrl",
+	},
+	.probe = pef2256_pinctrl_probe,
+};
+module_platform_driver(pef2256_pinctrl_driver);
+
+MODULE_AUTHOR("Herve Codina <herve.codina@bootlin.com>");
+MODULE_DESCRIPTION("PEF2256 pin controller driver");
+MODULE_LICENSE("GPL");