Merge tag 'trace-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Don't destroy user event fields when removal fails

   User event fields are destroyed before the event is removed from
   visibility. But that can fail leaving the still visible event with no
   fields. Move the destroying of the fields to after the event is
   successfully removed from visibility.

 - Initialize function graph state is fork before calling
   copy_exec_state()

   For non-CLONE_VM forks, copy_exec_state() allocates a new
   task_exec_state. If that allocation fails, ftrace_graph_exit_task()
   will free the tasks ret_stack pointer. Since that pointer is still
   using the parent's ret_stack, it mistakenly frees the parent's
   pointer too.

   Call ftrace_graph_init() on the task first which will NULL out the
   new tasks's ret_stack and if the copy fails, it will not free
   anything.

 - Remove FGRAPH_MAX_INDEX

   The macro FGRAPH_MAX_INDEX was added but never used. Remove it.

 - Save ent_size in function graph printing of nested functions

   The function graph tracer needs to look at the next event to see if
   the next event is the return of the current function entry. If it is,
   it prints a single line:

	ktime_get();

   Otherwise it prints it like a nested function:

	tick_nohz_irq_exit() {
	    ktime_get();
	    kcpustat_irq_exit();
	}

   In order to look at the next event, it must save the current event so
   that it has the information to print from it. It saves the event in
   the iterator descriptor called "ent". What it doesn't save is the
   ent_size of the event which is now used to know if the function graph
   arguments are to be printed. The peek doesn't save the size so the
   size used happens to be that of the size of the last event that was
   seen.

   Save the entry event size in the iterator descriptor so that the
   correct size is used.

 - Fix several errors with freeing data in the histogram code

   The histogram code had a lot of leaked or or incorrect accounting
   when failures happen. Correct them.

 - Fix histogram regression of .percent and .graph modifiers

   Up until 6.3 histogram values could have "percent" or "graph"
   modifiers that changed how they were printed. But a change that added
   restricting histograms values from being strings, stack traces and
   other modifiers inadvertently prevented them from using the percent
   and graph modifiers, which were legal use cases for values.

   Put back the percent and graph modifiers.

 - Fix various typos in the comments

 - Set the trace_clock before initializing a histogram with clock
   argument

   The histogram API allows the user to specific which trace clock to
   use via a "clock=" string. The histogram is set up first before the
   clock is checked. If the passed in clock is not valid, it exits
   without fully fixing up the histogram leaving it on the list and a
   use-after-free can trigger.

   Update the clock argument first and if it fails then exit gracefully
   before the histogram trigger is placed on any lists.

 - Restore :mod: trailer after parsing in ftrace_set_clr_event

   The function ftrace_set_clr_event() modifies the parse string and
   needs to put it back to what was passed in. It searches for ":mod:"
   via a strsep() but fails to put back the first ':' in the string.

   Add back the ':' in the passed in string.

 - Take trace_array reference when opening a tracer options file

   The options files are dynamically created and some tracers add their
   own options. When a tracer adds their own list of options, the
   trace_array holding them has an array to hold the list of options for
   each tracer. This array increases in size via a krealloc(), and the
   new entry gets a newly allocated array to hold the options of the new
   tracer being added.

   The element in each entry of the tracer's option array holds a
   pointer back to the trace_array, a pointer to the tracer it is
   associated to, a pointer to the flags of the option.

   The issue is that these arrays are freed when the trace_array is
   freed when its instance it represents is removed from the instances
   directory. There's a race that an open of one of these options files
   can happen when the instance is being removed.

   Add a new helper function to be called by the open function of the
   options file to iterate all existing trace_arrays under a lock and
   find the one that has the given option element in one of it's tracer
   arrays. If found, then update the associated trace_array's reference
   counter to keep it from being freed. If not found, have the open call
   return -ENODEV.

 - Disable interrupts when acquiring the lock in rb_wake_up_waiters()

   The function rb_wake_up_waiters() assumes it will be called in
   interrupt context and does not disable irqs when taking
   cpu_buffer->reader_lock, which can be called in hard interrupt
   context. The issue is in PREEMPT_RT, this function is called in
   thread context leaving this lock open to a deadlock.

   Take the lock with interrupts disabled.

 - Use rcu_assign_pointer() for tmp_ops filter hash

   The tmp_ops used in update_ftrace_direct_mod() assigns its
   filter_hash field directly, but that field is annotated as __rcu and
   sparse complains. Assign it with rcu_assign_pointer()

 - Fix use-after-free in enable_trigger_private_data_free()

   The trace_event_call is accessed through the event_trigger_data's
   trace_event_file pointer to put the trace_event_call on freeing. The
   issue is that the trace_event_file data may have been freed already
   causing a use-after-free. Add a field to the event_trigger_data that
   points directly to the trace_event_call so that it can decrement its
   reference directly without needing to go through the
   trace_event_file.

 - Fix accounting of buffer data remote headers

   trace_buffer_desc_size() and trace_remote_alloc_buffer() undercount
   the number of pages is needed for the asked for size as it doesn't
   take into account the meta data on each page. Add a helper function
   to do the calculation properly and use that in these functions.

 - Catch nr_page_va overflow in ring_buffer_desc sizing

   The number of pages per remote ring buffer is capped by
   ring_buffer_desc::nr_page_va (32 bits). A buffer_size large enough to
   overflow that field would silently allocate a descriptor smaller than
   what was asked for.

 - Do not resize the subbuf order if any per_cpu buffer is disabled

   The mmapping of ring buffers disables resizing the subbuffers, but it
   is done per-cpu whereas the subbuf size change is done for all the
   per_cpu buffers under the buffer->mutex. It could change the size of
   some while the mapping is happening on others. Have the resize of the
   subbuf order check all the per_cpu buffers under the lock to see if
   any of them is disabled before starting and causing an inconsistency
   between buffers that are being mapped.

* tag 'trace-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: (25 commits)
  ring-buffer: Check resize_disabled before publishing the new subbuf order
  tracing/remotes: Catch nr_page_va overflow in ring_buffer_desc sizing
  tracing/remotes: Account for ring buffer page header in size calculation
  tracing: Don't dereference trace_event_file in deferred trigger free
  ftrace: Use rcu_assign_pointer() for tmp_ops filter hash
  ring-buffer: Acquire the lock with irqsave in rb_wake_up_waiters()
  tracing: Take trace_array reference when opening a tracer options file
  tracing: Fix ring_buffer_read_page_size() kernel-doc
  tracing: Restore :mod: trailer after parsing in ftrace_set_clr_event()
  tracing: Fix memory corruption from a "STACKTRACE" histogram key
  tracing: Fix memory corruption from the histogram stacktrace modifier
  tracing: Undo the registration when enabling the histogram trigger fails
  tracing: Take the reference before publishing the named histogram trigger
  tracing: Set the trace clock before registering the histogram trigger
  tracing: Fix typo "preceeded" in comment
  tracing: Fix typo "availabe" in comment
  tracing: Let histogram values keep the percent and graph modifiers
  tracing: Keep the entry count when the histogram stats allocation fails
  tracing: Free histogram the field rejected for a bad modifier
  tracing: Free histogram the var ref when its initialization fails
  ...

7 files changed, 658 insertions, 0 deletions

diff --git a/include/soc/at91/at91sam9_ddrsdr.h b/include/soc/at91/at91sam9_ddrsdr.h
new file mode 100644
index 000000000..ffdec6f82
--- /dev/null
+++ b/include/soc/at91/at91sam9_ddrsdr.h
@@ -0,0 +1,123 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Header file for the Atmel DDR/SDR SDRAM Controller
+ *
+ * Copyright (C) 2010 Atmel Corporation
+ *	Nicolas Ferre <nicolas.ferre@atmel.com>
+ */
+#ifndef AT91SAM9_DDRSDR_H
+#define AT91SAM9_DDRSDR_H
+
+#define AT91_DDRSDRC_MR		0x00	/* Mode Register */
+#define		AT91_DDRSDRC_MODE	(0x7 << 0)		/* Command Mode */
+#define			AT91_DDRSDRC_MODE_NORMAL	0
+#define			AT91_DDRSDRC_MODE_NOP		1
+#define			AT91_DDRSDRC_MODE_PRECHARGE	2
+#define			AT91_DDRSDRC_MODE_LMR		3
+#define			AT91_DDRSDRC_MODE_REFRESH	4
+#define			AT91_DDRSDRC_MODE_EXT_LMR	5
+#define			AT91_DDRSDRC_MODE_DEEP		6
+
+#define AT91_DDRSDRC_RTR	0x04	/* Refresh Timer Register */
+#define		AT91_DDRSDRC_COUNT	(0xfff << 0)		/* Refresh Timer Counter */
+
+#define AT91_DDRSDRC_CR		0x08	/* Configuration Register */
+#define		AT91_DDRSDRC_NC		(3 << 0)		/* Number of Column Bits */
+#define			AT91_DDRSDRC_NC_SDR8	(0 << 0)
+#define			AT91_DDRSDRC_NC_SDR9	(1 << 0)
+#define			AT91_DDRSDRC_NC_SDR10	(2 << 0)
+#define			AT91_DDRSDRC_NC_SDR11	(3 << 0)
+#define			AT91_DDRSDRC_NC_DDR9	(0 << 0)
+#define			AT91_DDRSDRC_NC_DDR10	(1 << 0)
+#define			AT91_DDRSDRC_NC_DDR11	(2 << 0)
+#define			AT91_DDRSDRC_NC_DDR12	(3 << 0)
+#define		AT91_DDRSDRC_NR		(3 << 2)		/* Number of Row Bits */
+#define			AT91_DDRSDRC_NR_11	(0 << 2)
+#define			AT91_DDRSDRC_NR_12	(1 << 2)
+#define			AT91_DDRSDRC_NR_13	(2 << 2)
+#define			AT91_DDRSDRC_NR_14	(3 << 2)
+#define		AT91_DDRSDRC_CAS	(7 << 4)		/* CAS Latency */
+#define			AT91_DDRSDRC_CAS_2	(2 << 4)
+#define			AT91_DDRSDRC_CAS_3	(3 << 4)
+#define			AT91_DDRSDRC_CAS_25	(6 << 4)
+#define		AT91_DDRSDRC_RST_DLL	(1 << 7)		/* Reset DLL */
+#define		AT91_DDRSDRC_DICDS	(1 << 8)		/* Output impedance control */
+#define		AT91_DDRSDRC_DIS_DLL	(1 << 9)		/* Disable DLL [SAM9 Only] */
+#define		AT91_DDRSDRC_OCD	(1 << 12)		/* Off-Chip Driver [SAM9 Only] */
+#define		AT91_DDRSDRC_DQMS	(1 << 16)		/* Mask Data is Shared [SAM9 Only] */
+#define		AT91_DDRSDRC_ACTBST	(1 << 18)		/* Active Bank X to Burst Stop Read Access Bank Y [SAM9 Only] */
+
+#define AT91_DDRSDRC_T0PR	0x0C	/* Timing 0 Register */
+#define		AT91_DDRSDRC_TRAS	(0xf <<  0)		/* Active to Precharge delay */
+#define		AT91_DDRSDRC_TRCD	(0xf <<  4)		/* Row to Column delay */
+#define		AT91_DDRSDRC_TWR	(0xf <<  8)		/* Write recovery delay */
+#define		AT91_DDRSDRC_TRC	(0xf << 12)		/* Row cycle delay */
+#define		AT91_DDRSDRC_TRP	(0xf << 16)		/* Row precharge delay */
+#define		AT91_DDRSDRC_TRRD	(0xf << 20)		/* Active BankA to BankB */
+#define		AT91_DDRSDRC_TWTR	(0x7 << 24)		/* Internal Write to Read delay */
+#define		AT91_DDRSDRC_RED_WRRD	(0x1 << 27)		/* Reduce Write to Read Delay [SAM9 Only] */
+#define		AT91_DDRSDRC_TMRD	(0xf << 28)		/* Load mode to active/refresh delay */
+
+#define AT91_DDRSDRC_T1PR	0x10	/* Timing 1 Register */
+#define		AT91_DDRSDRC_TRFC	(0x1f << 0)		/* Row Cycle Delay */
+#define		AT91_DDRSDRC_TXSNR	(0xff << 8)		/* Exit self-refresh to non-read */
+#define		AT91_DDRSDRC_TXSRD	(0xff << 16)		/* Exit self-refresh to read */
+#define		AT91_DDRSDRC_TXP	(0xf  << 24)		/* Exit power-down delay */
+
+#define AT91_DDRSDRC_T2PR	0x14	/* Timing 2 Register [SAM9 Only] */
+#define		AT91_DDRSDRC_TXARD	(0xf  << 0)		/* Exit active power down delay to read command in mode "Fast Exit" */
+#define		AT91_DDRSDRC_TXARDS	(0xf  << 4)		/* Exit active power down delay to read command in mode "Slow Exit" */
+#define		AT91_DDRSDRC_TRPA	(0xf  << 8)		/* Row Precharge All delay */
+#define		AT91_DDRSDRC_TRTP	(0x7  << 12)		/* Read to Precharge delay */
+
+#define AT91_DDRSDRC_LPR	0x1C	/* Low Power Register */
+#define		AT91_DDRSDRC_LPCB	(3 << 0)		/* Low-power Configurations */
+#define			AT91_DDRSDRC_LPCB_DISABLE		0
+#define			AT91_DDRSDRC_LPCB_SELF_REFRESH		1
+#define			AT91_DDRSDRC_LPCB_POWER_DOWN		2
+#define			AT91_DDRSDRC_LPCB_DEEP_POWER_DOWN	3
+#define		AT91_DDRSDRC_CLKFR	(1 << 2)	/* Clock Frozen */
+#define		AT91_DDRSDRC_LPDDR2_PWOFF	(1 << 3)	/* LPDDR Power Off */
+#define		AT91_DDRSDRC_PASR	(7 << 4)	/* Partial Array Self Refresh */
+#define		AT91_DDRSDRC_TCSR	(3 << 8)	/* Temperature Compensated Self Refresh */
+#define		AT91_DDRSDRC_DS		(3 << 10)	/* Drive Strength */
+#define		AT91_DDRSDRC_TIMEOUT	(3 << 12)	/* Time to define when Low Power Mode is enabled */
+#define			AT91_DDRSDRC_TIMEOUT_0_CLK_CYCLES	(0 << 12)
+#define			AT91_DDRSDRC_TIMEOUT_64_CLK_CYCLES	(1 << 12)
+#define			AT91_DDRSDRC_TIMEOUT_128_CLK_CYCLES	(2 << 12)
+#define		AT91_DDRSDRC_APDE	(1 << 16)	 /* Active power down exit time */
+#define		AT91_DDRSDRC_UPD_MR	(3 << 20)	 /* Update load mode register and extended mode register */
+
+#define AT91_DDRSDRC_MDR	0x20	/* Memory Device Register */
+#define		AT91_DDRSDRC_MD		(7 << 0)	/* Memory Device Type */
+#define			AT91_DDRSDRC_MD_SDR		0
+#define			AT91_DDRSDRC_MD_LOW_POWER_SDR	1
+#define			AT91_DDRSDRC_MD_LOW_POWER_DDR	3
+#define			AT91_DDRSDRC_MD_LPDDR3		5
+#define			AT91_DDRSDRC_MD_DDR2		6	/* [SAM9 Only] */
+#define			AT91_DDRSDRC_MD_LPDDR2		7
+#define		AT91_DDRSDRC_DBW	(1 << 4)		/* Data Bus Width */
+#define			AT91_DDRSDRC_DBW_32BITS		(0 <<  4)
+#define			AT91_DDRSDRC_DBW_16BITS		(1 <<  4)
+
+#define AT91_DDRSDRC_DLL	0x24	/* DLL Information Register */
+#define		AT91_DDRSDRC_MDINC	(1 << 0)		/* Master Delay increment */
+#define		AT91_DDRSDRC_MDDEC	(1 << 1)		/* Master Delay decrement */
+#define		AT91_DDRSDRC_MDOVF	(1 << 2)		/* Master Delay Overflow */
+#define		AT91_DDRSDRC_MDVAL	(0xff <<  8)		/* Master Delay value */
+
+#define AT91_DDRSDRC_HS		0x2C	/* High Speed Register [SAM9 Only] */
+#define		AT91_DDRSDRC_DIS_ATCP_RD	(1 << 2)	/* Anticip read access is disabled */
+
+#define AT91_DDRSDRC_DELAY(n)	(0x30 + (0x4 * (n)))	/* Delay I/O Register n */
+
+#define AT91_DDRSDRC_WPMR	0xE4	/* Write Protect Mode Register [SAM9 Only] */
+#define		AT91_DDRSDRC_WP		(1 << 0)		/* Write protect enable */
+#define		AT91_DDRSDRC_WPKEY	(0xffffff << 8)		/* Write protect key */
+#define		AT91_DDRSDRC_KEY	(0x444452 << 8)		/* Write protect key = "DDR" */
+
+#define AT91_DDRSDRC_WPSR	0xE8	/* Write Protect Status Register [SAM9 Only] */
+#define		AT91_DDRSDRC_WPVS	(1 << 0)		/* Write protect violation status */
+#define		AT91_DDRSDRC_WPVSRC	(0xffff << 8)		/* Write protect violation source */
+
+#endif
diff --git a/include/soc/at91/at91sam9_sdramc.h b/include/soc/at91/at91sam9_sdramc.h
new file mode 100644
index 000000000..e816f9979
--- /dev/null
+++ b/include/soc/at91/at91sam9_sdramc.h
@@ -0,0 +1,81 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * arch/arm/mach-at91/include/mach/at91sam9_sdramc.h
+ *
+ * Copyright (C) 2007 Andrew Victor
+ * Copyright (C) 2007 Atmel Corporation.
+ *
+ * SDRAM Controllers (SDRAMC) - System peripherals registers.
+ * Based on AT91SAM9261 datasheet revision D.
+ */
+
+#ifndef AT91SAM9_SDRAMC_H
+#define AT91SAM9_SDRAMC_H
+
+/* SDRAM Controller (SDRAMC) registers */
+#define AT91_SDRAMC_MR		0x00	/* SDRAM Controller Mode Register */
+#define		AT91_SDRAMC_MODE	(0xf << 0)		/* Command Mode */
+#define			AT91_SDRAMC_MODE_NORMAL		0
+#define			AT91_SDRAMC_MODE_NOP		1
+#define			AT91_SDRAMC_MODE_PRECHARGE	2
+#define			AT91_SDRAMC_MODE_LMR		3
+#define			AT91_SDRAMC_MODE_REFRESH	4
+#define			AT91_SDRAMC_MODE_EXT_LMR	5
+#define			AT91_SDRAMC_MODE_DEEP		6
+
+#define AT91_SDRAMC_TR		0x04	/* SDRAM Controller Refresh Timer Register */
+#define		AT91_SDRAMC_COUNT	(0xfff << 0)		/* Refresh Timer Counter */
+
+#define AT91_SDRAMC_CR		0x08	/* SDRAM Controller Configuration Register */
+#define		AT91_SDRAMC_NC		(3 << 0)		/* Number of Column Bits */
+#define			AT91_SDRAMC_NC_8	(0 << 0)
+#define			AT91_SDRAMC_NC_9	(1 << 0)
+#define			AT91_SDRAMC_NC_10	(2 << 0)
+#define			AT91_SDRAMC_NC_11	(3 << 0)
+#define		AT91_SDRAMC_NR		(3 << 2)		/* Number of Row Bits */
+#define			AT91_SDRAMC_NR_11	(0 << 2)
+#define			AT91_SDRAMC_NR_12	(1 << 2)
+#define			AT91_SDRAMC_NR_13	(2 << 2)
+#define		AT91_SDRAMC_NB		(1 << 4)		/* Number of Banks */
+#define			AT91_SDRAMC_NB_2	(0 << 4)
+#define			AT91_SDRAMC_NB_4	(1 << 4)
+#define		AT91_SDRAMC_CAS		(3 << 5)		/* CAS Latency */
+#define			AT91_SDRAMC_CAS_1	(1 << 5)
+#define			AT91_SDRAMC_CAS_2	(2 << 5)
+#define			AT91_SDRAMC_CAS_3	(3 << 5)
+#define		AT91_SDRAMC_DBW		(1 << 7)		/* Data Bus Width */
+#define			AT91_SDRAMC_DBW_32	(0 << 7)
+#define			AT91_SDRAMC_DBW_16	(1 << 7)
+#define		AT91_SDRAMC_TWR		(0xf <<  8)		/* Write Recovery Delay */
+#define		AT91_SDRAMC_TRC		(0xf << 12)		/* Row Cycle Delay */
+#define		AT91_SDRAMC_TRP		(0xf << 16)		/* Row Precharge Delay */
+#define		AT91_SDRAMC_TRCD	(0xf << 20)		/* Row to Column Delay */
+#define		AT91_SDRAMC_TRAS	(0xf << 24)		/* Active to Precharge Delay */
+#define		AT91_SDRAMC_TXSR	(0xf << 28)		/* Exit Self Refresh to Active Delay */
+
+#define AT91_SDRAMC_LPR		0x10	/* SDRAM Controller Low Power Register */
+#define		AT91_SDRAMC_LPCB		(3 << 0)	/* Low-power Configurations */
+#define			AT91_SDRAMC_LPCB_DISABLE		0
+#define			AT91_SDRAMC_LPCB_SELF_REFRESH		1
+#define			AT91_SDRAMC_LPCB_POWER_DOWN		2
+#define			AT91_SDRAMC_LPCB_DEEP_POWER_DOWN	3
+#define		AT91_SDRAMC_PASR		(7 << 4)	/* Partial Array Self Refresh */
+#define		AT91_SDRAMC_TCSR		(3 << 8)	/* Temperature Compensated Self Refresh */
+#define		AT91_SDRAMC_DS			(3 << 10)	/* Drive Strength */
+#define		AT91_SDRAMC_TIMEOUT		(3 << 12)	/* Time to define when Low Power Mode is enabled */
+#define			AT91_SDRAMC_TIMEOUT_0_CLK_CYCLES	(0 << 12)
+#define			AT91_SDRAMC_TIMEOUT_64_CLK_CYCLES	(1 << 12)
+#define			AT91_SDRAMC_TIMEOUT_128_CLK_CYCLES	(2 << 12)
+
+#define AT91_SDRAMC_IER		0x14	/* SDRAM Controller Interrupt Enable Register */
+#define AT91_SDRAMC_IDR		0x18	/* SDRAM Controller Interrupt Disable Register */
+#define AT91_SDRAMC_IMR		0x1C	/* SDRAM Controller Interrupt Mask Register */
+#define AT91_SDRAMC_ISR		0x20	/* SDRAM Controller Interrupt Status Register */
+#define		AT91_SDRAMC_RES		(1 << 0)		/* Refresh Error Status */
+
+#define AT91_SDRAMC_MDR		0x24	/* SDRAM Memory Device Register */
+#define		AT91_SDRAMC_MD		(3 << 0)		/* Memory Device Type */
+#define			AT91_SDRAMC_MD_SDRAM		0
+#define			AT91_SDRAMC_MD_LOW_POWER_SDRAM	1
+
+#endif
diff --git a/include/soc/at91/atmel-secumod.h b/include/soc/at91/atmel-secumod.h
new file mode 100644
index 000000000..8dbdafe0a
--- /dev/null
+++ b/include/soc/at91/atmel-secumod.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Atmel Security Module register offsets and bit definitions.
+ *
+ * Copyright (C) 2016 Atmel
+ *
+ * Author: Alexandre Belloni <alexandre.belloni@free-electrons.com>
+ */
+
+#ifndef _LINUX_SOC_AT91_ATMEL_SECUMOD_H
+#define _LINUX_SOC_AT91_ATMEL_SECUMOD_H
+
+#define AT91_SECUMOD_RAMRDY	0x14
+#define AT91_SECUMOD_RAMRDY_READY	BIT(0)
+
+#endif /* _LINUX_SOC_AT91_ATMEL_SECUMOD_H */
diff --git a/include/soc/at91/atmel-sfr.h b/include/soc/at91/atmel-sfr.h
new file mode 100644
index 000000000..c71c0318b
--- /dev/null
+++ b/include/soc/at91/atmel-sfr.h
@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Atmel SFR (Special Function Registers) register offsets and bit definitions.
+ *
+ * Copyright (C) 2016 Atmel
+ *
+ * Author: Ludovic Desroches <ludovic.desroches@atmel.com>
+ */
+
+#ifndef _LINUX_MFD_SYSCON_ATMEL_SFR_H
+#define _LINUX_MFD_SYSCON_ATMEL_SFR_H
+
+#define AT91_SFR_DDRCFG		0x04	/* DDR Configuration Register */
+#define AT91_SFR_CCFG_EBICSA	0x04	/* EBI Chip Select Register */
+/* 0x08 ~ 0x0c: Reserved */
+#define AT91_SFR_OHCIICR	0x10	/* OHCI INT Configuration Register */
+#define AT91_SFR_OHCIISR	0x14	/* OHCI INT Status Register */
+#define AT91_SFR_UTMICKTRIM	0x30	/* UTMI Clock Trimming Register */
+#define AT91_SFR_UTMISWAP	0x3c	/* UTMI DP/DM Pin Swapping Register */
+#define AT91_SFR_LS		0x7c	/* Light Sleep Register */
+#define AT91_SFR_I2SCLKSEL	0x90	/* I2SC Register */
+#define AT91_SFR_WPMR		0xe4	/* Write Protection Mode Register */
+
+/* Field definitions */
+#define AT91_SFR_CCFG_EBI_CSA(cs, val)		((val) << (cs))
+#define AT91_SFR_CCFG_EBI_DBPUC			BIT(8)
+#define AT91_SFR_CCFG_EBI_DBPDC			BIT(9)
+#define AT91_SFR_CCFG_EBI_DRIVE			BIT(17)
+#define AT91_SFR_CCFG_NFD0_ON_D16		BIT(24)
+#define AT91_SFR_CCFG_DDR_MP_EN			BIT(25)
+
+#define AT91_SFR_OHCIICR_RES(x)			BIT(x)
+#define AT91_SFR_OHCIICR_ARIE			BIT(4)
+#define AT91_SFR_OHCIICR_APPSTART		BIT(5)
+#define AT91_SFR_OHCIICR_USB_SUSP(x)		BIT(8 + (x))
+#define AT91_SFR_OHCIICR_UDPPUDIS		BIT(23)
+#define AT91_OHCIICR_USB_SUSPEND		GENMASK(10, 8)
+
+#define AT91_SFR_OHCIISR_RIS(x)			BIT(x)
+
+#define AT91_UTMICKTRIM_FREQ			GENMASK(1, 0)
+
+#define AT91_SFR_UTMISWAP_PORT(x)		BIT(x)
+
+#define AT91_SFR_LS_VALUE(x)			BIT(x)
+#define AT91_SFR_LS_MEM_POWER_GATING_ULP1_EN	BIT(16)
+
+#define AT91_SFR_WPMR_WPEN			BIT(0)
+#define AT91_SFR_WPMR_WPKEY_MASK		GENMASK(31, 8)
+
+#endif /* _LINUX_MFD_SYSCON_ATMEL_SFR_H */
diff --git a/include/soc/at91/atmel_tcb.h b/include/soc/at91/atmel_tcb.h
new file mode 100644
index 000000000..26b56a07b
--- /dev/null
+++ b/include/soc/at91/atmel_tcb.h
@@ -0,0 +1,272 @@
+/*
+ * Timer/Counter Unit (TC) registers.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef __SOC_ATMEL_TCB_H
+#define __SOC_ATMEL_TCB_H
+
+#include <linux/compiler.h>
+#include <linux/list.h>
+
+/*
+ * Many 32-bit Atmel SOCs include one or more TC blocks, each of which holds
+ * three general-purpose 16-bit timers.  These timers share one register bank.
+ * Depending on the SOC, each timer may have its own clock and IRQ, or those
+ * may be shared by the whole TC block.
+ *
+ * These TC blocks may have up to nine external pins:  TCLK0..2 signals for
+ * clocks or clock gates, and per-timer TIOA and TIOB signals used for PWM
+ * or triggering.  Those pins need to be set up for use with the TC block,
+ * else they will be used as GPIOs or for a different controller.
+ *
+ * Although we expect each TC block to have a platform_device node, those
+ * nodes are not what drivers bind to.  Instead, they ask for a specific
+ * TC block, by number ... which is a common approach on systems with many
+ * timers.  Then they use clk_get() and platform_get_irq() to get clock and
+ * IRQ resources.
+ */
+
+struct clk;
+
+/**
+ * struct atmel_tcb_config - SoC data for a Timer/Counter Block
+ * @counter_width: size in bits of a timer counter register
+ * @has_gclk: boolean indicating if a timer counter has a generic clock
+ * @has_qdec: boolean indicating if a timer counter has a quadrature
+ * decoder.
+ */
+struct atmel_tcb_config {
+	size_t	counter_width;
+	bool    has_gclk;
+	bool    has_qdec;
+};
+
+/**
+ * struct atmel_tc - information about a Timer/Counter Block
+ * @pdev: physical device
+ * @regs: mapping through which the I/O registers can be accessed
+ * @id: block id
+ * @tcb_config: configuration data from SoC
+ * @irq: irq for each of the three channels
+ * @clk: internal clock source for each of the three channels
+ * @node: list node, for tclib internal use
+ * @allocated: if already used, for tclib internal use
+ *
+ * On some platforms, each TC channel has its own clocks and IRQs,
+ * while on others, all TC channels share the same clock and IRQ.
+ * Drivers should clk_enable() all the clocks they need even though
+ * all the entries in @clk may point to the same physical clock.
+ * Likewise, drivers should request irqs independently for each
+ * channel, but they must use IRQF_SHARED in case some of the entries
+ * in @irq are actually the same IRQ.
+ */
+struct atmel_tc {
+	struct platform_device	*pdev;
+	void __iomem		*regs;
+	int                     id;
+	const struct atmel_tcb_config *tcb_config;
+	int			irq[3];
+	struct clk		*clk[3];
+	struct clk		*slow_clk;
+	struct list_head	node;
+	bool			allocated;
+};
+
+/* platform-specific ATMEL_TC_TIMER_CLOCKx divisors (0 means 32KiHz) */
+extern const u8 atmel_tc_divisors[5];
+
+
+/*
+ * Two registers have block-wide controls.  These are: configuring the three
+ * "external" clocks (or event sources) used by the timer channels; and
+ * synchronizing the timers by resetting them all at once.
+ *
+ * "External" can mean "external to chip" using the TCLK0, TCLK1, or TCLK2
+ * signals.  Or, it can mean "external to timer", using the TIOA output from
+ * one of the other two timers that's being run in waveform mode.
+ */
+
+#define ATMEL_TC_BCR	0xc0		/* TC Block Control Register */
+#define     ATMEL_TC_SYNC	(1 << 0)	/* synchronize timers */
+
+#define ATMEL_TC_BMR	0xc4		/* TC Block Mode Register */
+#define     ATMEL_TC_TC0XC0S	(3 << 0)	/* external clock 0 source */
+#define        ATMEL_TC_TC0XC0S_TCLK0	(0 << 0)
+#define        ATMEL_TC_TC0XC0S_NONE	(1 << 0)
+#define        ATMEL_TC_TC0XC0S_TIOA1	(2 << 0)
+#define        ATMEL_TC_TC0XC0S_TIOA2	(3 << 0)
+#define     ATMEL_TC_TC1XC1S	(3 << 2)	/* external clock 1 source */
+#define        ATMEL_TC_TC1XC1S_TCLK1	(0 << 2)
+#define        ATMEL_TC_TC1XC1S_NONE	(1 << 2)
+#define        ATMEL_TC_TC1XC1S_TIOA0	(2 << 2)
+#define        ATMEL_TC_TC1XC1S_TIOA2	(3 << 2)
+#define     ATMEL_TC_TC2XC2S	(3 << 4)	/* external clock 2 source */
+#define        ATMEL_TC_TC2XC2S_TCLK2	(0 << 4)
+#define        ATMEL_TC_TC2XC2S_NONE	(1 << 4)
+#define        ATMEL_TC_TC2XC2S_TIOA0	(2 << 4)
+#define        ATMEL_TC_TC2XC2S_TIOA1	(3 << 4)
+
+
+/*
+ * Each TC block has three "channels", each with one counter and controls.
+ *
+ * Note that the semantics of ATMEL_TC_TIMER_CLOCKx (input clock selection
+ * when it's not "external") is silicon-specific.  AT91 platforms use one
+ * set of definitions; AVR32 platforms use a different set.  Don't hard-wire
+ * such knowledge into your code, use the global "atmel_tc_divisors" ...
+ * where index N is the divisor for clock N+1, else zero to indicate it uses
+ * the 32 KiHz clock.
+ *
+ * The timers can be chained in various ways, and operated in "waveform"
+ * generation mode (including PWM) or "capture" mode (to time events).  In
+ * both modes, behavior can be configured in many ways.
+ *
+ * Each timer has two I/O pins, TIOA and TIOB.  Waveform mode uses TIOA as a
+ * PWM output, and TIOB as either another PWM or as a trigger.  Capture mode
+ * uses them only as inputs.
+ */
+#define ATMEL_TC_CHAN(idx)	((idx)*0x40)
+#define ATMEL_TC_REG(idx, reg)	(ATMEL_TC_CHAN(idx) + ATMEL_TC_ ## reg)
+
+#define ATMEL_TC_CCR	0x00		/* Channel Control Register */
+#define     ATMEL_TC_CLKEN	(1 << 0)	/* clock enable */
+#define     ATMEL_TC_CLKDIS	(1 << 1)	/* clock disable */
+#define     ATMEL_TC_SWTRG	(1 << 2)	/* software trigger */
+
+#define ATMEL_TC_CMR	0x04		/* Channel Mode Register */
+
+/* Both modes share some CMR bits */
+#define     ATMEL_TC_TCCLKS	(7 << 0)	/* clock source */
+#define        ATMEL_TC_TIMER_CLOCK1	(0 << 0)
+#define        ATMEL_TC_TIMER_CLOCK2	(1 << 0)
+#define        ATMEL_TC_TIMER_CLOCK3	(2 << 0)
+#define        ATMEL_TC_TIMER_CLOCK4	(3 << 0)
+#define        ATMEL_TC_TIMER_CLOCK5	(4 << 0)
+#define        ATMEL_TC_XC0		(5 << 0)
+#define        ATMEL_TC_XC1		(6 << 0)
+#define        ATMEL_TC_XC2		(7 << 0)
+#define     ATMEL_TC_CLKI	(1 << 3)	/* clock invert */
+#define     ATMEL_TC_BURST	(3 << 4)	/* clock gating */
+#define        ATMEL_TC_GATE_NONE	(0 << 4)
+#define        ATMEL_TC_GATE_XC0	(1 << 4)
+#define        ATMEL_TC_GATE_XC1	(2 << 4)
+#define        ATMEL_TC_GATE_XC2	(3 << 4)
+#define     ATMEL_TC_WAVE	(1 << 15)	/* true = Waveform mode */
+
+/* CAPTURE mode CMR bits */
+#define     ATMEL_TC_LDBSTOP	(1 << 6)	/* counter stops on RB load */
+#define     ATMEL_TC_LDBDIS	(1 << 7)	/* counter disable on RB load */
+#define     ATMEL_TC_ETRGEDG	(3 << 8)	/* external trigger edge */
+#define        ATMEL_TC_ETRGEDG_NONE	(0 << 8)
+#define        ATMEL_TC_ETRGEDG_RISING	(1 << 8)
+#define        ATMEL_TC_ETRGEDG_FALLING	(2 << 8)
+#define        ATMEL_TC_ETRGEDG_BOTH	(3 << 8)
+#define     ATMEL_TC_ABETRG	(1 << 10)	/* external trigger is TIOA? */
+#define     ATMEL_TC_CPCTRG	(1 << 14)	/* RC compare trigger enable */
+#define     ATMEL_TC_LDRA	(3 << 16)	/* RA loading edge (of TIOA) */
+#define        ATMEL_TC_LDRA_NONE	(0 << 16)
+#define        ATMEL_TC_LDRA_RISING	(1 << 16)
+#define        ATMEL_TC_LDRA_FALLING	(2 << 16)
+#define        ATMEL_TC_LDRA_BOTH	(3 << 16)
+#define     ATMEL_TC_LDRB	(3 << 18)	/* RB loading edge (of TIOA) */
+#define        ATMEL_TC_LDRB_NONE	(0 << 18)
+#define        ATMEL_TC_LDRB_RISING	(1 << 18)
+#define        ATMEL_TC_LDRB_FALLING	(2 << 18)
+#define        ATMEL_TC_LDRB_BOTH	(3 << 18)
+
+/* WAVEFORM mode CMR bits */
+#define     ATMEL_TC_CPCSTOP	(1 <<  6)	/* RC compare stops counter */
+#define     ATMEL_TC_CPCDIS	(1 <<  7)	/* RC compare disables counter */
+#define     ATMEL_TC_EEVTEDG	(3 <<  8)	/* external event edge */
+#define        ATMEL_TC_EEVTEDG_NONE	(0 << 8)
+#define        ATMEL_TC_EEVTEDG_RISING	(1 << 8)
+#define        ATMEL_TC_EEVTEDG_FALLING	(2 << 8)
+#define        ATMEL_TC_EEVTEDG_BOTH	(3 << 8)
+#define     ATMEL_TC_EEVT	(3 << 10)	/* external event source */
+#define        ATMEL_TC_EEVT_TIOB	(0 << 10)
+#define        ATMEL_TC_EEVT_XC0	(1 << 10)
+#define        ATMEL_TC_EEVT_XC1	(2 << 10)
+#define        ATMEL_TC_EEVT_XC2	(3 << 10)
+#define     ATMEL_TC_ENETRG	(1 << 12)	/* external event is trigger */
+#define     ATMEL_TC_WAVESEL	(3 << 13)	/* waveform type */
+#define        ATMEL_TC_WAVESEL_UP	(0 << 13)
+#define        ATMEL_TC_WAVESEL_UPDOWN	(1 << 13)
+#define        ATMEL_TC_WAVESEL_UP_AUTO	(2 << 13)
+#define        ATMEL_TC_WAVESEL_UPDOWN_AUTO (3 << 13)
+#define     ATMEL_TC_ACPA	(3 << 16)	/* RA compare changes TIOA */
+#define        ATMEL_TC_ACPA_NONE	(0 << 16)
+#define        ATMEL_TC_ACPA_SET	(1 << 16)
+#define        ATMEL_TC_ACPA_CLEAR	(2 << 16)
+#define        ATMEL_TC_ACPA_TOGGLE	(3 << 16)
+#define     ATMEL_TC_ACPC	(3 << 18)	/* RC compare changes TIOA */
+#define        ATMEL_TC_ACPC_NONE	(0 << 18)
+#define        ATMEL_TC_ACPC_SET	(1 << 18)
+#define        ATMEL_TC_ACPC_CLEAR	(2 << 18)
+#define        ATMEL_TC_ACPC_TOGGLE	(3 << 18)
+#define     ATMEL_TC_AEEVT	(3 << 20)	/* external event changes TIOA */
+#define        ATMEL_TC_AEEVT_NONE	(0 << 20)
+#define        ATMEL_TC_AEEVT_SET	(1 << 20)
+#define        ATMEL_TC_AEEVT_CLEAR	(2 << 20)
+#define        ATMEL_TC_AEEVT_TOGGLE	(3 << 20)
+#define     ATMEL_TC_ASWTRG	(3 << 22)	/* software trigger changes TIOA */
+#define        ATMEL_TC_ASWTRG_NONE	(0 << 22)
+#define        ATMEL_TC_ASWTRG_SET	(1 << 22)
+#define        ATMEL_TC_ASWTRG_CLEAR	(2 << 22)
+#define        ATMEL_TC_ASWTRG_TOGGLE	(3 << 22)
+#define     ATMEL_TC_BCPB	(3 << 24)	/* RB compare changes TIOB */
+#define        ATMEL_TC_BCPB_NONE	(0 << 24)
+#define        ATMEL_TC_BCPB_SET	(1 << 24)
+#define        ATMEL_TC_BCPB_CLEAR	(2 << 24)
+#define        ATMEL_TC_BCPB_TOGGLE	(3 << 24)
+#define     ATMEL_TC_BCPC	(3 << 26)	/* RC compare changes TIOB */
+#define        ATMEL_TC_BCPC_NONE	(0 << 26)
+#define        ATMEL_TC_BCPC_SET	(1 << 26)
+#define        ATMEL_TC_BCPC_CLEAR	(2 << 26)
+#define        ATMEL_TC_BCPC_TOGGLE	(3 << 26)
+#define     ATMEL_TC_BEEVT	(3 << 28)	/* external event changes TIOB */
+#define        ATMEL_TC_BEEVT_NONE	(0 << 28)
+#define        ATMEL_TC_BEEVT_SET	(1 << 28)
+#define        ATMEL_TC_BEEVT_CLEAR	(2 << 28)
+#define        ATMEL_TC_BEEVT_TOGGLE	(3 << 28)
+#define     ATMEL_TC_BSWTRG	(3 << 30)	/* software trigger changes TIOB */
+#define        ATMEL_TC_BSWTRG_NONE	(0 << 30)
+#define        ATMEL_TC_BSWTRG_SET	(1 << 30)
+#define        ATMEL_TC_BSWTRG_CLEAR	(2 << 30)
+#define        ATMEL_TC_BSWTRG_TOGGLE	(3 << 30)
+
+#define ATMEL_TC_CV	0x10		/* counter Value */
+#define ATMEL_TC_RA	0x14		/* register A */
+#define ATMEL_TC_RB	0x18		/* register B */
+#define ATMEL_TC_RC	0x1c		/* register C */
+
+#define ATMEL_TC_SR	0x20		/* status (read-only) */
+/* Status-only flags */
+#define     ATMEL_TC_CLKSTA	(1 << 16)	/* clock enabled */
+#define     ATMEL_TC_MTIOA	(1 << 17)	/* TIOA mirror */
+#define     ATMEL_TC_MTIOB	(1 << 18)	/* TIOB mirror */
+
+#define ATMEL_TC_IER	0x24		/* interrupt enable (write-only) */
+#define ATMEL_TC_IDR	0x28		/* interrupt disable (write-only) */
+#define ATMEL_TC_IMR	0x2c		/* interrupt mask (read-only) */
+
+/* Status and IRQ flags */
+#define     ATMEL_TC_COVFS	(1 <<  0)	/* counter overflow */
+#define     ATMEL_TC_LOVRS	(1 <<  1)	/* load overrun */
+#define     ATMEL_TC_CPAS	(1 <<  2)	/* RA compare */
+#define     ATMEL_TC_CPBS	(1 <<  3)	/* RB compare */
+#define     ATMEL_TC_CPCS	(1 <<  4)	/* RC compare */
+#define     ATMEL_TC_LDRAS	(1 <<  5)	/* RA loading */
+#define     ATMEL_TC_LDRBS	(1 <<  6)	/* RB loading */
+#define     ATMEL_TC_ETRGS	(1 <<  7)	/* external trigger */
+#define     ATMEL_TC_ALL_IRQ	(ATMEL_TC_COVFS	| ATMEL_TC_LOVRS | \
+				 ATMEL_TC_CPAS | ATMEL_TC_CPBS | \
+				 ATMEL_TC_CPCS | ATMEL_TC_LDRAS | \
+				 ATMEL_TC_LDRBS | ATMEL_TC_ETRGS) \
+				 /* all IRQs */
+
+#endif
diff --git a/include/soc/at91/sama7-ddr.h b/include/soc/at91/sama7-ddr.h
new file mode 100644
index 000000000..5ad7ac2e3
--- /dev/null
+++ b/include/soc/at91/sama7-ddr.h
@@ -0,0 +1,88 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Microchip SAMA7 UDDR Controller and DDR3 PHY Controller registers offsets
+ * and bit definitions.
+ *
+ * Copyright (C) [2020] Microchip Technology Inc. and its subsidiaries
+ *
+ * Author: Claudu Beznea <claudiu.beznea@microchip.com>
+ */
+
+#ifndef __SAMA7_DDR_H__
+#define __SAMA7_DDR_H__
+
+/* DDR3PHY */
+#define DDR3PHY_PIR				(0x04)		/* DDR3PHY PHY Initialization Register	*/
+#define	DDR3PHY_PIR_DLLBYP			(1 << 17)	/* DLL Bypass */
+#define		DDR3PHY_PIR_ITMSRST		(1 << 4)	/* Interface Timing Module Soft Reset */
+#define	DDR3PHY_PIR_DLLLOCK			(1 << 2)	/* DLL Lock */
+#define		DDR3PHY_PIR_DLLSRST		(1 << 1)	/* DLL Soft Rest */
+#define	DDR3PHY_PIR_INIT			(1 << 0)	/* Initialization Trigger */
+
+#define DDR3PHY_PGCR				(0x08)		/* DDR3PHY PHY General Configuration Register */
+#define		DDR3PHY_PGCR_CKDV1		(1 << 13)	/* CK# Disable Value */
+#define		DDR3PHY_PGCR_CKDV0		(1 << 12)	/* CK Disable Value */
+
+#define	DDR3PHY_PGSR				(0x0C)		/* DDR3PHY PHY General Status Register */
+#define		DDR3PHY_PGSR_IDONE		(1 << 0)	/* Initialization Done */
+
+#define	DDR3PHY_ACDLLCR				(0x14)		/* DDR3PHY AC DLL Control Register */
+#define		DDR3PHY_ACDLLCR_DLLSRST		(1 << 30)	/* DLL Soft Reset */
+
+#define DDR3PHY_ACIOCR				(0x24)		/* DDR3PHY AC I/O Configuration Register */
+#define		DDR3PHY_ACIOCR_CSPDD_CS0	(1 << 18)	/* CS#[0] Power Down Driver */
+#define		DDR3PHY_ACIOCR_CKPDD_CK0	(1 << 8)	/* CK[0] Power Down Driver */
+#define		DDR3PHY_ACIORC_ACPDD		(1 << 3)	/* AC Power Down Driver */
+
+#define DDR3PHY_DXCCR				(0x28)		/* DDR3PHY DATX8 Common Configuration Register */
+#define		DDR3PHY_DXCCR_DXPDR		(1 << 3)	/* Data Power Down Receiver */
+
+#define DDR3PHY_DSGCR				(0x2C)		/* DDR3PHY DDR System General Configuration Register */
+#define		DDR3PHY_DSGCR_ODTPDD_ODT0	(1 << 20)	/* ODT[0] Power Down Driver */
+
+#define DDR3PHY_ZQ0SR0				(0x188)		/* ZQ status register 0 */
+#define DDR3PHY_ZQ0SR0_PDO_OFF			(0)		/* Pull-down output impedance select offset */
+#define DDR3PHY_ZQ0SR0_PUO_OFF			(5)		/* Pull-up output impedance select offset */
+#define DDR3PHY_ZQ0SR0_PDODT_OFF		(10)		/* Pull-down on-die termination impedance select offset */
+#define DDR3PHY_ZQ0SRO_PUODT_OFF		(15)		/* Pull-up on-die termination impedance select offset */
+
+#define	DDR3PHY_DX0DLLCR			(0x1CC)		/* DDR3PHY DATX8 DLL Control Register */
+#define	DDR3PHY_DX1DLLCR			(0x20C)		/* DDR3PHY DATX8 DLL Control Register */
+#define		DDR3PHY_DXDLLCR_DLLDIS		(1 << 31)	/* DLL Disable */
+
+/* UDDRC */
+#define UDDRC_STAT				(0x04)		/* UDDRC Operating Mode Status Register */
+#define		UDDRC_STAT_SELFREF_TYPE_DIS	(0x0 << 4)	/* SDRAM is not in Self-refresh */
+#define		UDDRC_STAT_SELFREF_TYPE_PHY	(0x1 << 4)	/* SDRAM is in Self-refresh, which was caused by PHY Master Request */
+#define		UDDRC_STAT_SELFREF_TYPE_SW	(0x2 << 4)	/* SDRAM is in Self-refresh, which was not caused solely under Automatic Self-refresh control */
+#define		UDDRC_STAT_SELFREF_TYPE_AUTO	(0x3 << 4)	/* SDRAM is in Self-refresh, which was caused by Automatic Self-refresh only */
+#define		UDDRC_STAT_SELFREF_TYPE_MSK	(0x3 << 4)	/* Self-refresh type mask */
+#define		UDDRC_STAT_OPMODE_INIT		(0x0 << 0)	/* Init */
+#define		UDDRC_STAT_OPMODE_NORMAL	(0x1 << 0)	/* Normal */
+#define		UDDRC_STAT_OPMODE_PWRDOWN	(0x2 << 0)	/* Power-down */
+#define		UDDRC_STAT_OPMODE_SELF_REFRESH	(0x3 << 0)	/* Self-refresh */
+#define		UDDRC_STAT_OPMODE_MSK		(0x7 << 0)	/* Operating mode mask */
+
+#define UDDRC_PWRCTL				(0x30)		/* UDDRC Low Power Control Register */
+#define		UDDRC_PWRCTL_SELFREF_EN		(1 << 0)	/* Automatic self-refresh */
+#define		UDDRC_PWRCTL_SELFREF_SW		(1 << 5)	/* Software self-refresh */
+
+#define UDDRC_DFIMISC				(0x1B0)		/* UDDRC DFI Miscellaneous Control Register */
+#define		UDDRC_DFIMISC_DFI_INIT_COMPLETE_EN (1 << 0)	/* PHY initialization complete enable signal */
+
+#define UDDRC_SWCTRL				(0x320)		/* UDDRC Software Register Programming Control Enable */
+#define		UDDRC_SWCTRL_SW_DONE		(1 << 0)	/* Enable quasi-dynamic register programming outside reset */
+
+#define UDDRC_SWSTAT				(0x324)		/* UDDRC Software Register Programming Control Status */
+#define		UDDRC_SWSTAT_SW_DONE_ACK	(1 << 0)	/* Register programming done */
+
+#define UDDRC_PSTAT				(0x3FC)		/* UDDRC Port Status Register */
+#define	UDDRC_PSTAT_ALL_PORTS			(0x1F001F)	/* Read + writes outstanding transactions on all ports */
+
+#define UDDRC_PCTRL_0				(0x490)		/* UDDRC Port 0 Control Register */
+#define UDDRC_PCTRL_1				(0x540)		/* UDDRC Port 1 Control Register */
+#define UDDRC_PCTRL_2				(0x5F0)		/* UDDRC Port 2 Control Register */
+#define UDDRC_PCTRL_3				(0x6A0)		/* UDDRC Port 3 Control Register */
+#define UDDRC_PCTRL_4				(0x750)		/* UDDRC Port 4 Control Register */
+
+#endif /* __SAMA7_DDR_H__ */
diff --git a/include/soc/at91/sama7-sfrbu.h b/include/soc/at91/sama7-sfrbu.h
new file mode 100644
index 000000000..8cee48d1a
--- /dev/null
+++ b/include/soc/at91/sama7-sfrbu.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Microchip SAMA7 SFRBU registers offsets and bit definitions.
+ *
+ * Copyright (C) [2020] Microchip Technology Inc. and its subsidiaries
+ *
+ * Author: Claudu Beznea <claudiu.beznea@microchip.com>
+ */
+
+#ifndef __SAMA7_SFRBU_H__
+#define __SAMA7_SFRBU_H__
+
+#ifdef CONFIG_SOC_SAMA7
+
+#define AT91_SFRBU_PSWBU			(0x00)		/* SFRBU Power Switch BU Control Register */
+#define		AT91_SFRBU_PSWBU_PSWKEY		(0x4BD20C << 8)	/* Specific value mandatory to allow writing of other register bits */
+#define		AT91_SFRBU_PSWBU_STATE		(1 << 2)	/* Power switch BU state */
+#define		AT91_SFRBU_PSWBU_SOFTSWITCH	(1 << 1)	/* Power switch BU source selection */
+#define		AT91_SFRBU_PSWBU_CTRL		(1 << 0)	/* Power switch BU control */
+
+#define AT91_FRBU_DDRPWR			(0x10)		/* SFRBU DDR Power Control Register */
+#define		AT91_FRBU_DDRPWR_STATE		(1 << 0)	/* DDR Power Mode State */
+
+#endif /* CONFIG_SOC_SAMA7 */
+
+#endif /* __SAMA7_SFRBU_H__ */
+