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path: root/drivers/misc/sram.c
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2015-06-12misc: sram: sort and clean up included headersVladimir Zapolskiy
Most of the included header files are already included as dependencies. Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-06-12misc: sram: move reserved block logic out of probe functionVladimir Zapolskiy
No functional change, but now previously overloaded sram_probe() is greatly simplified and perceptible, reserved regions logic also has its own space. Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-06-12misc: sram: add private struct device and virt_base membersVladimir Zapolskiy
No functional change, this is a preceding change to simplify separation of reserved partition handling logic from probe() function. Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-06-12misc: sram: report correct SRAM pool sizeVladimir Zapolskiy
Since some space in SRAM may be reserved, report the left free space in the allocated memory pool instead of total physical size of the SRAM device. Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-06-12misc: sram: bump error message level on unclean driver unbindingVladimir Zapolskiy
Report an error level message to a user, if the driver is unbound while there are still some pool allocations. Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-06-12misc: sram: fix device node reference leak on errorVladimir Zapolskiy
A pointer device node reference should be decremented on manual exit from for_each_available_child_of_node() loop. Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-06-12misc: sram: fix enabled clock leak on error pathVladimir Zapolskiy
If devm_gen_pool_create() fails, the previously enabled sram->clk is not disabled on probe() exit. Because reserved block logic relies only on information from device tree, there is no need to get and enable device clock in advance, especially because not provided clock is not considered as an error, so it is safe to place devm_clk_get() at the end of probe(). No functional change. Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-16misc: sram: switch to ioremap_wc from ioremapAbhilash Kesavan
Currently, the SRAM allocator returns device memory via ioremap. This causes issues on ARM64 when the internal SoC SRAM allocated by the generic sram driver is used for audio playback. The destination buffer address (which is ioremapped SRAM) is not 64-bit aligned for certain streams (e.g. 44.1k sampling rate). In such cases we get unhandled alignment faults. Use ioremap_wc in place of ioremap which gives us normal non-cacheable memory instead of device memory. Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com> Tested-by: Tony Lindgren <tony@atomide.com> Tested-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-16misc: constify of_device_id arrayFabian Frederick
of_device_id is always used as const. (See driver.of_match_table and open firmware functions) Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-28misc: sram: implement reserved sram areasHeiko Stübner
This implements support for defining reserved areas as subnodes, to keep the genpool from using these. Suggested-by: Rob Herring <robherring2@gmail.com> Signed-off-by: Heiko Stuebner <heiko@sntech.de> Tested-by: Ulrich Prinz <ulrich.prinz@googlemail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-07misc: sram: cleanup the codeXiubo Li
Since the devm_gen_pool_create() is used, so the gen_pool_destroy() here is redundant. Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com> Acked-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-07-24misc: sram: fix error path in sram_probeHeiko Stübner
The pool is created thru devm_gen_pool_create, so the call to gen_pool_destroy is not necessary. Instead the sram-clock must be turned off again if it exists. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Tested-by: Ulrich Prinz <ulrich.prinz@googlemail.com> Acked-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-17Misc: sram: Remove unneeded checkAlexander Shiyan
Patch removes unneeded check for resource since devm_ioremap_resource do all for us. Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-16drivers: misc: use devm_ioremap_resource()Laurent Navet
Replace a call to deprecated devm_request_and_ioremap by devm_ioremap_resource. Found with coccicheck and this semantic patch: scripts/coccinelle/api/devm_request_and_ioremap.cocci. Signed-off-by: Laurent Navet <laurent.navet@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-29misc: generic on-chip SRAM allocation driverPhilipp Zabel
This driver requests and remaps a memory region as configured in the device tree. It serves memory from this region via the genalloc API. It optionally enables the SRAM clock. Other drivers can retrieve the genalloc pool from a phandle pointing to this drivers' device node in the device tree. The allocation granularity is hard-coded to 32 bytes for now, to make the SRAM driver useful for the 6502 remoteproc driver. There is overhead for bigger SRAMs, where only a much coarser allocation granularity is needed: At 32 bytes minimum allocation size, a 256 KiB SRAM needs a 1 KiB bitmap to track allocations. [akpm@linux-foundation.org: fix Kconfig text, make sram_init static] Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Reviewed-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Michal Simek <monstr@monstr.eu> Cc: Dong Aisheng <dong.aisheng@linaro.org> Cc: Fabio Estevam <fabio.estevam@freescale.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Huang Shijie <shijie8@gmail.com> Cc: Javier Martin <javier.martin@vista-silicon.com> Cc: Matt Porter <mporter@ti.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>