linux-stable.git/drivers/nvmem, branch linux-4.11.y

nvmem: core: fix leaks on registration errors

2017-07-21T05:00:13+00:00

commit 3360acdf839170b612f5b212539694c20e3f16d0 upstream.

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: b6c217ab9be6 ("nvmem: Add backwards compatibility support for older EEPROM drivers.")
Fixes: eace75cfdcf7 ("nvmem: Add a simple NVMEM framework for nvmem providers")
Cc: Andrew Lunn 
Cc: Srinivas Kandagatla 
Cc: Mika Westerberg 
Signed-off-by: Johan Hovold 
Acked-by: Andrey Smirnov 
Signed-off-by: Srinivas Kandagatla 
Signed-off-by: Greg Kroah-Hartman

nvmem: core: Allow getting nvmem cell with a NULL cell id

2017-01-25T10:49:39+00:00

The nvmem cell with a NULL cell name/id should be the one
with no accompanying 'nvmem-cell-names' property, and thus
will be the cell at index 0 in the device tree.
So, we default to index 0 and update the cell index only when
nvmem cell name id exists.

Suggested-by: Stephen Boyd 
Signed-off-by: Vivek Gautam 
Reviewed-by: Stephen Boyd 
Signed-off-by: Srinivas Kandagatla 
Signed-off-by: Greg Kroah-Hartman

nvmem: core: Correct a bunch of function documentations

2017-01-25T10:49:39+00:00

Correct the documentation for arguments to a number
of functions.

Signed-off-by: Vivek Gautam 
Signed-off-by: Srinivas Kandagatla 
Signed-off-by: Greg Kroah-Hartman

nvmem: core: Allow ignoring length when reading a cell

2017-01-25T10:49:39+00:00

nvmem_cell_read() API fills in the argument 'len' with
the number of bytes read from the cell. Many users don't
care about this length value. So allow users to pass a
NULL pointer to this len field.

Signed-off-by: Vivek Gautam 
Reviewed-by: Stephen Boyd 
Signed-off-by: Srinivas Kandagatla 
Signed-off-by: Greg Kroah-Hartman

nvmem: octop: Add support for imx6ul

2017-01-25T10:49:39+00:00

i.MX6UL is an new SOC of i.MX6 family. Enable ocotp
driver support for this SOC.

Signed-off-by: Bai Ping 
Signed-off-by: Srinivas Kandagatla 
Signed-off-by: Greg Kroah-Hartman

nvmem: fix nvmem_cell_read() return type doc

2017-01-04T17:22:47+00:00

nvmem_cell_read() returns void *, not char *. This is a cleanup that got
left out of commit a6c50912508d ("nvmem: Declare nvmem_cell_read()
consistently").

Signed-off-by: Brian Norris 
Fixes: a6c50912508d ("nvmem: Declare nvmem_cell_read() consistently")
Signed-off-by: Srinivas Kandagatla 
Signed-off-by: Greg Kroah-Hartman

nvmem: imx-ocotp: Fix wrong register size

2017-01-04T17:22:47+00:00

All i.MX6 SoCs have an OCOTP Controller with 4kbit fuses. The i.MX6SL is
an exception and has only 2kbit fuses.

In the TRM for the i.MX6DQ (IMX6QDRM - Rev 2, 06/2014) the fuses size is
described in chapter 46.1.1 with:
"32-bit word restricted program and read to 4Kbits of eFuse OTP(512x8)."

In the TRM for the i.MX6SL (IMX6SLRM - Rev 2, 06/2015) the fuses size is
described in chapter 34.1.1 with:
"32-bit word restricted program and read to 2 kbit of eFuse OTP(128x8)."

Since the Freescale Linux kernel OCOTP driver works with a fuses size of
2 kbit for the i.MX6SL, it looks like the TRM is wrong and the formula
to calculate the correct fuses size has to be 256x8.

Signed-off-by: Daniel Schultz 
Signed-off-by: Srinivas Kandagatla 
Signed-off-by: Greg Kroah-Hartman

nvmem: qfprom: Allow single byte accesses for read/write

2017-01-04T17:22:47+00:00

The nvmem core driver supports to read and write single
byte. So, allow qfprom to support this feature.
This change helps in extracting a required value based
on bit-offset and number of bits for the required value
in the nvmem cell.

Signed-off-by: Vivek Gautam 
Cc: Srinivas Kandagatla 
Signed-off-by: Srinivas Kandagatla 
Signed-off-by: Greg Kroah-Hartman

nvmem: Add the Broadcom OTP controller driver

2016-11-10T14:34:56+00:00

Add support for 32 and 64-bit versions of Broadcom's On-Chip OTP
controller. These controllers are used on SoC's such as Cygnus and
Stingray.

Reviewed-by: Ray Jui 
Tested-by: Jonathan Richardson 
Signed-off-by: Scott Branden 
Signed-off-by: Oza Pawandeep 
Signed-off-by: Jonathan Richardson 
Signed-off-by: Srinivas Kandagatla 
Signed-off-by: Greg Kroah-Hartman

nvmem: add NXP LPC18xx OTP driver

2016-11-10T14:34:55+00:00

Add simple read only driver for the internal OTP (One Time Programmable)
memory found on all NXP LPC18xx and LPC43xx devices.

The OTP memory is split into 4 banks each with 4 32-bits word. Some of
the banks contain predefined data while others are for general purpose
and user programmable via the OTP API in ROM. Note that writing to the
OTP memory is not yet supported.

Signed-off-by: Joachim Eastwood 
Tested-by: Vladimir Zapolskiy 
Signed-off-by: Srinivas Kandagatla 
Signed-off-by: Greg Kroah-Hartman