The Other Logic Blocks of Mobileye SoCs are clock providers, and some of
them are registered early with CLK_OF_DECLARE_DRIVER(). Their early init
maps the registers with of_iomap(), which does not request the memory
region. On the platform device side, eqc_probe() used a plain ioremap()
too, so none of the OLB regions were reserved in the iomem_resource
tree.
Patch 1 converts eqc_probe() to devm_platform_ioremap_resource(): the
region gets requested and the mapping is released by the devres
machinery on unbind. The mapping is moved before the match data check so
that OLBs bound without match data also get mapped and reserved.
Patch 2 adds a match table entry for mobileye,eyeq6h-central-olb without
match data. All of its clocks are registered by the early init and it
has no auxiliary devices; bind it to get its region reserved.
No functional change in normal operation, besides the region reservation.
Signed-off-by: Benoît Monin <benoit.monin@bootlin.com>
---
Changes in v3:
- Unregister the clocks if the clock provider registration fails
(Thanks Brian and sashiko for the review)
- Link to v2: https://patch.msgid.link/20260914-clk-eyeq-res-v2-0-687e5de3aba7@bootlin.com
Changes in v2:
- Fix early return comment in eqc_probe() (Thanks Théo for the review)
- Split the patch in two (Thanks Brian for the review)
- Link to v1: https://patch.msgid.link/20260911-clk-eyeq-res-v1-1-39b04542db38@bootlin.com
To: Vladimir Kondratiev <vladimir.kondratiev@mobileye.com>
To: Gregory CLEMENT <gregory.clement@bootlin.com>
To: Théo Lebrun <theo.lebrun@bootlin.com>
To: Stephen Boyd <sboyd@kernel.org>
To: Brian Masney <bmasney+clk@redhat.com>
To: Jerome Brunet <jbrunet+clk@baylibre.com>
To: Benoît Monin <benoit.monin@bootlin.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Tawfik Bayouk <tawfik.bayouk@mobileye.com>
Cc: linux-mips@vger.kernel.org
Cc: linux-clk@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
---
Benoît Monin (2):
clk: eyeq: Use devm_platform_ioremap_resource()
clk: eyeq: Add mobileye,eyeq6h-central-olb compatible
drivers/clk/clk-eyeq.c | 31 ++++++++++++++++++++-----------
1 file changed, 20 insertions(+), 11 deletions(-)
---
base-commit: cee9395acd8043be0644b25c34bfa86623f2b935
change-id: 20260910-clk-eyeq-res-ddbf87fc4fd4
Best regards,
--
Benoît Monin, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com