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Geert Uytterhoeven 33aca1c868 ARM: renesas: Propagate RPC-IF enablement to subsequent software 
As the Renesas Reduced Pin Count Interface may be locked by TF-A, it is
disabled by default[1].  When unlocked, TF-A passes a DT fragment to
enable it, which is applied to the U-Boot DT[2].

Unlike the memory layout, the RPC-IF enablement is not propagated to
subsequent software.  Hence e.g. Linux cannot know if the RPC-IF is
locked or not, and will lock-up when trying to access the RPC-IF when
locked.

Fix this by checking if the RPC-IF is enabled in the TF-A DT fragment, and
setting the status of the RPC-IF device node in the target DT, if
present, to "okay".  Do this only when a "flash" subnode is found, to
avoid errors in subsequent software when the RPC-IF is not intended to
be used.

Note that this requires the status of the RPC-IF node to be set to
"disabled" in the target DT, just like in the U-Boot DT.

[1] commit 3d5f45c95c ("ARM: dts: rmobile: Disable RPC HF by
    default")
[2] commit 361377dbdb ("ARM: rmobile: Merge prior-stage firmware
    DT fragment into U-Boot DT on Gen3")

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2022-09-02 13:25:01 +02:00
..
alt reset: Remove addr parameter from reset_cpu() 2021-03-02 14:03:02 -05:00
blanche reset: Remove addr parameter from reset_cpu() 2021-03-02 14:03:02 -05:00
condor ARM: renesas: Mallocate bootparams on Gen3 2021-08-08 12:27:04 +02:00
draak Convert CONFIG_SYS_I2C_LEGACY to Kconfig and add CONFIG_[ST]PL_SYS_I2C_LEGACY 2021-08-30 14:10:07 -04:00
eagle Finish conversion of CONFIG_SYS_CLK_FREQ to Kconfig 2021-12-27 16:20:18 -05:00
ebisu ARM: renesas: Mallocate bootparams on Gen3 2021-08-08 12:27:04 +02:00
falcon ARM: renesas: Add GICv3 initialization for V3U Falcon 2021-06-24 20:22:18 +02:00
gose Finish conversion of CONFIG_SYS_CLK_FREQ to Kconfig 2021-12-27 16:20:18 -05:00
grpeach Remove #include <version.h> from files which do not need it 2021-09-17 12:10:44 -04:00
koelsch Finish conversion of CONFIG_SYS_CLK_FREQ to Kconfig 2021-12-27 16:20:18 -05:00
lager Finish conversion of CONFIG_SYS_CLK_FREQ to Kconfig 2021-12-27 16:20:18 -05:00
porter Finish conversion of CONFIG_SYS_CLK_FREQ to Kconfig 2021-12-27 16:20:18 -05:00
r2dplus treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
rcar-common ARM: renesas: Propagate RPC-IF enablement to subsequent software 2022-09-02 13:25:01 +02:00
salvator-x Convert CONFIG_SYS_I2C_LEGACY to Kconfig and add CONFIG_[ST]PL_SYS_I2C_LEGACY 2021-08-30 14:10:07 -04:00
silk reset: Remove addr parameter from reset_cpu() 2021-03-02 14:03:02 -05:00
stout Finish conversion of CONFIG_SYS_CLK_FREQ to Kconfig 2021-12-27 16:20:18 -05:00
ulcb Convert CONFIG_SYS_I2C_LEGACY to Kconfig and add CONFIG_[ST]PL_SYS_I2C_LEGACY 2021-08-30 14:10:07 -04:00