This adds the necessary data for handling eFuse on the rk322x.
Signed-off-by: NFinley Xiao <finley.xiao@rock-chips.com>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Adding entries to nvmem_cells and deleting entries from it is
protected by nvmem_cells_mutex. Therefore this mutex should
also protect iterating over the list.
Signed-off-by: NHeiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: NSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Call put_device() in nvmem_unregister() to make sure nvmem_release
gets called freeing up allocated resources.

Cc: cphealy@gmail.com
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: NAndrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: NSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Make sure to deregister and release the nvmem device and underlying
memory on registration errors.

Note that the private data must be freed using put_device() once the
struct device has been initialised.

Also note that there's a related reference leak in the deregistration
function as reported by Mika Westerberg which is being fixed separately.

Fixes: b6c217ab ("nvmem: Add backwards compatibility support for older EEPROM drivers.")
Fixes: eace75cf ("nvmem: Add a simple NVMEM framework for nvmem providers")
Cc: stable <stable@vger.kernel.org>     # 4.3
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: NJohan Hovold <johan@kernel.org>
Acked-by: NAndrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: NSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

- use data write offset to write otp data instead of read offset
- use OTP program command 0x8 to write otp with ECC rather than just
command 0xA without ECC

Fixes: 9d59c6e8 ("nvmem: Add the Broadcom OTP controller driver")
Signed-off-by: NOza Pawandeep <oza.oza@broadcom.com>
Signed-off-by: NScott Branden <scott.branden@broadcom.com>
Signed-off-by: NSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Like other subsystems we should be able to define slave devices outside
of the w1 directory. To do this we move public facing interface
definitions to include/linux/w1.h and rename the internal definition
file to w1_internal.h.

As w1_family.h and w1_int.h contained almost entirely public
driver interface definitions we simply removed these files and
moved the remaining definitions into w1_internal.h.

With this we can now start to move slave devices out of w1/slaves and
into the subsystem based on the function they implement, again like
other drivers.
Signed-off-by: NAndrew F. Davis <afd@ti.com>
Reviewed-by: NSebastian Reichel <sre@kernel.org>
Acked-by: NEvgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add missing MODULE_LICENSE("GPL") to the core FSI driver.
Signed-off-by: NChristopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

For slaves that are behind a software-clocked master, we want FSI CFAMs
to run asynchronously to the FSI clock, so set up our slaves to be in
async mode.
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NChristopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add an engine driver to expose a "hub" FSI master - which has a set of
control registers in the engine address space, and uses a chunk of the
slave address space for actual FSI communication.

Additional changes from Jeremy Kerr <jk@ozlabs.org>.
Signed-off-by: NChristopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NJoel Stanley <joel@jms.id.au>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Create a simple SCOM engine device driver that reads and writes
its control registers via an FSI bus.

Includes changes from Edward A. James <eajames@us.ibm.com>.
Signed-off-by: NChristopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NJoel Stanley <joel@jms.id.au>
Signed-off-by: NEdward A. James <eajames@us.ibm.com>
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Trace low level input/output GPIO operations.
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NChristopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Implement a FSI master using GPIO.  Will generate FSI protocol for
read and write commands to particular addresses.  Sends master command
and waits for and decodes a slave response.

Includes changes from Edward A. James <eajames@us.ibm.com> and Jeremy
Kerr <jk@ozlabs.org>.
Signed-off-by: NEdward A. James <eajames@us.ibm.com>
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NChristopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NJoel Stanley <joel@jms.id.au>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add info for sysfs scan file in Documentaiton ABI/testing
Signed-off-by: NChristopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This change implements error handling in the FSI core, by cleaining up
and retrying failed operations, using the SISC, TERM and BREAK
facilities.
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NChristopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Trace low level read and write FSI bus operations.
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NJoel Stanley <joel@jms.id.au>
Signed-off-by: NChristopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Allow drivers to access the slave address ranges.
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NJoel Stanley <joel@jms.id.au>
Signed-off-by: NChristopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This change adds a 'raw' file for reads & writes, and a 'term' file for
the TERM command, and a 'break' file for issuing a BREAK.
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NJoel Stanley <joel@jms.id.au>
Signed-off-by: NChristopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add driver_register and driver_unregister wrappers for FSI.
Signed-off-by: NChristopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NJoel Stanley <joel@jms.id.au>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add fsi master gpio device tree binding documentation.

Includes changes from Jeremy Kerr <jk@ozlabs.org>.
Signed-off-by: NChristopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NJoel Stanley <joel@jms.id.au>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Allow a master to undo a previous scan.  Should a master scan a bus
twice it will need to ensure it doesn't double register any
previously detected device.
Signed-off-by: NChristopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NJoel Stanley <joel@jms.id.au>
----
v7 - Unscan when unregistering master
   - Remove leading '__'s from function names
   - Return fail state for sysfs rescan file
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This change introduces the fsi device API: simple read, write and peek
accessors for the devices' address spaces.

Includes contributions from Christopher Bostic
<cbostic@linux.vnet.ibm.com> and Edward A. James <eajames@us.ibm.com>.
Signed-off-by: NEdward A. James <eajames@us.ibm.com>
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NChristopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NJoel Stanley <joel@jms.id.au>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Now that we have fsi_slave devices, scan each for endpoints, and
register them on the fsi bus.

Includes contributions from Christopher Bostic
<cbostic@linux.vnet.ibm.com>.
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NChristopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NJoel Stanley <joel@jms.id.au>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Set CFAM to appropriate ID so that the controlling master can manage
link memory ranges.  Add slave engine register definitions.

Includes changes from Jeremy Kerr <jk@ozlabs.org>.
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NChristopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NJoel Stanley <joel@jms.id.au>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Implement fsi_slave_init: if we can read a chip ID, create fsi_slave
devices and register with the driver core.

Includes changes from Christopher Bostic <cbostic@linux.vnet.ibm.com>.
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NChristopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NJoel Stanley <joel@jms.id.au>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Enable each link and send a break command, and try to detect a slave by
reading from the SMODE register.
Signed-off-by: NChristopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NJoel Stanley <joel@jms.id.au>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Introduce functions to perform reads/writes on the slave address space;
these simply pass the request on the slave's master with the correct
link and slave ID.

We implement these on top of similar helpers for the master.
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NJoel Stanley <joel@jms.id.au>
Signed-off-by: NChris Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add a little helper for crc4 calculations. This works 4-bits-at-a-time,
using a simple table approach.

We will need this in the FSI core code, as well as any master
implementations that need to calculate CRCs in software.
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NChris Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NJoel Stanley <joel@jms.id.au>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

When a new fsi master is added, we will need to scan its links, and
slaves attached to those links. This change introduces a little shell to
iterate the links, which we will populate with the actual slave scan in
a later change.
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NChris Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NJoel Stanley <joel@jms.id.au>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add the initial fsi slave device, which is private to the core code.
This will be a child of the master, and parent to endpoint devices.
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NChris Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NJoel Stanley <joel@jms.id.au>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add a `struct fsi_master` to represent a FSI master controller.

FSI master drivers register one of these structs to provide
device-specific of the standard operations: read/write/term/break and
link control.

Includes changes from Edward A. James <eajames@us.ibm.com> & Jeremy Kerr
<jk@ozlabs.org>.
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NChris Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: NJoel Stanley <joel@jms.id.au>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Disable Network file system support.

Reviewed-at: https://android-review.googlesource.com/#/c/409559/Signed-off-by: NRoberto Pereira <rpere@google.com>
[AmitP: cherry-picked this change from Android common kernel
        and updated commit message]
Signed-off-by: NAmit Pundir <amit.pundir@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add CONFIG_CGROUP_BPF as a default configuration in android base config
since it is used to replace XT_QTAGUID in future.

Reviewed-at: https://android-review.googlesource.com/#/c/400374/Signed-off-by: NChenbo Feng <fengc@google.com>
[AmitP: cherry-picked this change from Android common kernel]
Signed-off-by: NAmit Pundir <amit.pundir@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This adds CONFIG_MODULES, CONFIG_MODULE_UNLOAD, and CONFIG_MODVERSIONS
which are required by the O release.

Reviewed-at: https://android-review.googlesource.com/#/c/364554/Signed-off-by: NGreg Kroah-Hartman <gregkh@google.com>
[AmitP: cherry-picked this change from Android common kernel]
Signed-off-by: NAmit Pundir <amit.pundir@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This adds CONFIG_IKCONFIG and CONFIG_IKCONFIG_PROC options, which are a
requirement for the O release.

Reviewed-at: https://android-review.googlesource.com/#/c/364553/Signed-off-by: NGreg Kroah-Hartman <gregkh@google.com>
[AmitP: cherry-picked this change from Android common kernel]
Signed-off-by: NAmit Pundir <amit.pundir@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Enable CPU domain PAN to ensure that normal kernel accesses are
unable to access userspace addresses.

Reviewed-at: https://android-review.googlesource.com/#/c/334035/Signed-off-by: NSami Tolvanen <samitolvanen@google.com>
[AmitP: cherry-picked this change from Android common kernel, updated
        the commit message and re-placed the CONFIG_STRICT_KERNEL_RWX
        config in sorted order]
Signed-off-by: NAmit Pundir <amit.pundir@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Turn off the two kernel configs to disable related system ABI.

Reviewed-at: https://android-review.googlesource.com/#/c/264976/Signed-off-by: NMax Shi <meixuanshi@google.com>
[AmitP: cherry-picked this change from Android common kernel]
Signed-off-by: NAmit Pundir <amit.pundir@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Enable PAN emulation using TTBR0_EL1 switching.

Reviewed-at: https://android-review.googlesource.com/#/c/325997/Signed-off-by: NSami Tolvanen <samitolvanen@google.com>
[AmitP: cherry-picked this change from Android common kernel
        and updated the commit message]
Signed-off-by: NAmit Pundir <amit.pundir@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

If compiler has stack protector support, set
CONFIG_CC_STACKPROTECTOR_STRONG.

Reviewed-at: https://android-review.googlesource.com/#/c/238388/Signed-off-by: NJeff Vander Stoep <jeffv@google.com>
[AmitP: cherry-picked this change from Android common kernel]
Signed-off-by: NAmit Pundir <amit.pundir@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add debug unit on Qualcomm msm8916 based platforms, including the
DragonBoard 410c board.
Signed-off-by: NLeo Yan <leo.yan@linaro.org>
Reviewed-by: NMathieu Poirier <mathieu.poirier@linaro.org>
Acked-by: NAndy Gross <andy.gross@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Bind debug module driver for Hi6220.
Signed-off-by: NLeo Yan <leo.yan@linaro.org>
Reviewed-by: NMathieu Poirier <mathieu.poirier@linaro.org>
Acked-by: NWei Xu <xuwei5@hisilicon.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>