linux-toradex.git/drivers/memory/brcmstb_dpfe.c, branch v4.20

memory: brcmstb: dpfe: Remove need for dpfe_dev

2018-05-09T19:15:26+00:00

We can hook sysfs objects to the parent platform device that we are
created from, no need to have a synthetic dpfe_dev just for that. This
incidentally removes the need for having an index, since we are
guaranteed to have an unique path in the sysfs hiearchy.

Acked-by: Markus Mayer 
Signed-off-by: Florian Fainelli

memory: brcmstb: dpfe: support new way of passing data from the DCPU

2018-02-23T18:56:59+00:00

The DCPU can now send message data in two ways:
  - via the data RAM, as before (this is now message type 0)
  - via the message RAM (this is message type 1)

In order to support both methods, we check the message type of the
response (bits 31:28) and then treat the offset (bits 27:0)
accordingly.

Signed-off-by: Markus Mayer 
Signed-off-by: Florian Fainelli

memory: brcmstb: dpfe: fix type declaration of variable "ret"

2018-02-23T18:56:31+00:00

In some functions, variable "ret" should be ssize_t, so we fix it.

Fixes: 2f330caff577 ("memory: brcmstb: Add driver for DPFE")
Signed-off-by: Markus Mayer 
Signed-off-by: Florian Fainelli

memory: brcmstb: dpfe: properly mask vendor error bits

2018-02-23T18:56:07+00:00

We were printing the entire 32 bit register rather than just the lower
8 bits. Anything above bit 7 is reserved and may be any random value.

Fixes: 2f330caff577 ("memory: brcmstb: Add driver for DPFE")
Signed-off-by: Markus Mayer 
Signed-off-by: Florian Fainelli

memory: brcmstb: dpfe: skip downloading firmware when possible

2017-10-06T23:19:14+00:00

We want to skip downloading the DPFE firmware from Linux if it was
already downloaded by the boot loader.

The driver now checks if the DCPU is already running and, if so,
whether it can process commands. If the DCPU processes commands
successfully, the driver skips the firmware download step.

Signed-off-by: Markus Mayer 
Signed-off-by: Florian Fainelli

memory: brcmstb: dpfe: introduce is_dcpu_enabled()

2017-10-06T23:18:46+00:00

In order to check whether or not the DCPU is running, we introduce
a function called is_dcpu_enabled().

Signed-off-by: Markus Mayer 
Signed-off-by: Florian Fainelli

memory: brcmstb: Add driver for DPFE

2017-09-18T18:59:39+00:00

This driver allows access to DRAM properties, such as the refresh rate,
via the Broadcom STB DDR PHY Front End (DPFE). The refresh rate can be
used as indirect indicator of the DRAM temperature.

The driver also allows setting of the sampling interval.

Signed-off-by: Markus Mayer 
Signed-off-by: Florian Fainelli