The PRUSSs on AM57xx SoCs contain an MDIO controller that can
be used to control external PHYs associated with the Industrial
Ethernet peripherals within each PRUSS. The MDIO module used
within the PRU-ICSS is an instance of the MDIO Controller used
in TI Davinci SoCs. The same bus frequency of 1 MHz is chosen as
the regular MDIO node.
The nodes are added in the common am57-pruss.dtsi file and enabled
by default, but are disabled in all the existing AM57xx board dts
files. These nodes need pinctrl lines, and so should be enabled
only on boards where they are actually wired and pinned out for
PRUSS Ethernet. Any new board dts file should disable these if
they are not sure.
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Add the DT nodes for the PRU-ICSS1 and PRU-ICSS2 processor subsystems
that are present on AM57xx family of SoCs. Each PRU-ICSS instance is
represented by a pruss node and other child nodes. The two PRU-ICSSs
are identical to each other. They are not supported on DRA7xx SoCs in
general, so the nodes are added under the respective interconnect target
module nodes in a common am57-pruss.dtsi file. The file is already
included only in the AM57xx related board files.
The PRU-ICSSs on AM57xx are very similar to the PRUSS in AM33xx and AM437x
except for variations in the RAM sizes and the number of interrupts coming
into the MPU INTC. The interrupt events into the PRU-ICSS also requires
programming of the corresponding crossbars properly.
The PRUSS subsystem node contains the entire address space. The various
sub-modules of the PRU-ICSS are represented as individual child nodes
(so platform devices themselves) of the PRUSS subsystem node. These
include the two PRU cores and the interrupt controller. All the Data
RAMs are represented within a child node of its own named 'memories'
without any compatible. The Real Time Media Independent Interface
controller (MII_RT), and the CFG sub-module are represented as syscon
nodes. The PRUSS CFG module has a clock mux for IEP clock, this clk
node is added under the CFG child node 'clocks'. The default source
for this mux clock is the ICSS_IEP_CLK clock.
The DT nodes use all standard properties. The regs property in the PRU
nodes define the addresses for the Instruction RAM, the Debug and Control
sub-modules for that PRU core. The firmware for each PRU core is defined
through a 'firmware-name' property.
The default names for the firmware images for each PRU core are defined
as follows (these can be adjusted either in derivative board dts files or
through sysfs at runtime if required):
PRU-ICSS1 PRU0 Core: am57xx-pru1_0-fw
PRU-ICSS1 PRU1 Core: am57xx-pru1_1-fw
PRU-ICSS2 PRU0 Core: am57xx-pru2_0-fw
PRU-ICSS2 PRU1 Core: am57xx-pru2_1-fw
Note:
1. There are few more sub-modules like the Industrial Ethernet Peripheral
(IEPs), MDIO, UART, eCAP that do not have bindings and so will be added
in the future.
2. The PRUSS INTC on AM57xx SoCs also connect the host interrupts 6 and 7
as possible DMA events, so use the 'ti,irqs-reserved' property in
derivative board dts files _if_ any of them should not be handled by
the host OS.
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.
Deterministic algorithm:
For each file:
If not .svg:
For each line:
If doesn't contain `\bxmlns\b`:
For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`:
If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`:
If both the HTTP and HTTPS versions
return 200 OK and serve the same content:
Replace HTTP with HTTPS.
Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de>
Signed-off-by: Tony Lindgren <tony@atomide.com>
The AM57xx family of SoCs contains two identical PRU-ICSS instances
that have a very unique SYSC register. The IPs do not have any
PRCM reset lines unlike those on AM33xx/AM437x SoCs. Add the PRUSS
interconnect target-module nodes with all the required properties.
Each of the PRUSS devices themselves shall be added as child nodes
to the corresponding interconnect node in the future. The PRU-ICSS
instances are only available on AM57xx family of SoCs and are not
supported on DRA7xx family of SoCs in general, so the target module
nodes are added in a separate dtsi file. This new dtsi file is
included in all the AM57xx SoC dtsi files, so the nodes are
automatically inherited and enabled on all AM57xx boards.
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
