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linux/drivers/misc/sram.c

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misc: generic on-chip SRAM allocation driver 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>
2013-04-29 16:17:12 -07:00
misc: sram: sort and clean up included headers 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>
2015-06-01 15:30:00 +03:00
misc: generic on-chip SRAM allocation driver 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>
2013-04-29 16:17:12 -07:00
misc: sram: implement reserved sram areas 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>
2014-02-25 12:46:34 +01:00
misc: sram: sort and clean up included headers 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>
2015-06-01 15:30:00 +03:00
misc: generic on-chip SRAM allocation driver 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>
2013-04-29 16:17:12 -07:00
misc: sram: add private struct device and virt_base members 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>
2015-06-01 15:29:58 +03:00
misc: generic on-chip SRAM allocation driver 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>
2013-04-29 16:17:12 -07:00
misc: sram: implement reserved sram areas 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>
2014-02-25 12:46:34 +01:00
misc: sram: move reserved block logic out of probe function 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>
2015-06-01 15:29:59 +03:00
misc: generic on-chip SRAM allocation driver 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>
2013-04-29 16:17:12 -07:00
misc: sram: move reserved block logic out of probe function 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>
2015-06-01 15:29:59 +03:00
misc: sram: implement reserved sram areas 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>
2014-02-25 12:46:34 +01:00
misc: sram: move reserved block logic out of probe function 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>
2015-06-01 15:29:59 +03:00
misc: generic on-chip SRAM allocation driver 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>
2013-04-29 16:17:12 -07:00
misc: sram: implement reserved sram areas 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>
2014-02-25 12:46:34 +01:00
Misc: sram: Remove unneeded check 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>
2013-06-10 18:43:53 +04:00
misc: generic on-chip SRAM allocation driver 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>
2013-04-29 16:17:12 -07:00
misc: sram: implement reserved sram areas 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>
2014-02-25 12:46:34 +01:00
misc: sram: fix enabled clock leak on error path 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>
2015-06-01 15:29:54 +03:00
misc: generic on-chip SRAM allocation driver 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>
2013-04-29 16:17:12 -07:00
misc: sram: implement reserved sram areas 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>
2014-02-25 12:46:34 +01:00
misc: sram: add private struct device and virt_base members 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>
2015-06-01 15:29:58 +03:00
misc: sram: implement reserved sram areas 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>
2014-02-25 12:46:34 +01:00
misc: sram: fix device node reference leak on error 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>
2015-06-01 15:29:55 +03:00
misc: sram: implement reserved sram areas 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>
2014-02-25 12:46:34 +01:00
misc: sram: add private struct device and virt_base members 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>
2015-06-01 15:29:58 +03:00
misc: sram: implement reserved sram areas 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>
2014-02-25 12:46:34 +01:00
misc: sram: fix device node reference leak on error 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>
2015-06-01 15:29:55 +03:00
misc: sram: implement reserved sram areas 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>
2014-02-25 12:46:34 +01:00
misc: sram: add private struct device and virt_base members 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>
2015-06-01 15:29:58 +03:00
misc: sram: implement reserved sram areas 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>
2014-02-25 12:46:34 +01:00
misc: sram: add private struct device and virt_base members 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>
2015-06-01 15:29:58 +03:00
misc: sram: implement reserved sram areas 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>
2014-02-25 12:46:34 +01:00
misc: sram: add private struct device and virt_base members 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>
2015-06-01 15:29:58 +03:00
misc: sram: implement reserved sram areas 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>
2014-02-25 12:46:34 +01:00
misc: sram: add private struct device and virt_base members 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>
2015-06-01 15:29:58 +03:00
misc: sram: implement reserved sram areas 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>
2014-02-25 12:46:34 +01:00
misc: sram: add private struct device and virt_base members 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>
2015-06-01 15:29:58 +03:00
misc: sram: implement reserved sram areas 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>
2014-02-25 12:46:34 +01:00
misc: sram: move reserved block logic out of probe function 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>
2015-06-01 15:29:59 +03:00
misc: sram: implement reserved sram areas 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>
2014-02-25 12:46:34 +01:00
misc: sram: move reserved block logic out of probe function 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>
2015-06-01 15:29:59 +03:00
misc: sram: add private struct device and virt_base members 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>
2015-06-01 15:29:58 +03:00
misc: sram: fix enabled clock leak on error path 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>
2015-06-01 15:29:54 +03:00
misc: generic on-chip SRAM allocation driver 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>
2013-04-29 16:17:12 -07:00
misc: sram: add private struct device and virt_base members 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>
2015-06-01 15:29:58 +03:00
misc: generic on-chip SRAM allocation driver 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>
2013-04-29 16:17:12 -07:00
misc: sram: add private struct device and virt_base members 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>
2015-06-01 15:29:58 +03:00
misc: generic on-chip SRAM allocation driver 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>
2013-04-29 16:17:12 -07:00
misc: constify of_device_id array 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>
2015-03-16 20:20:26 +01:00
misc: generic on-chip SRAM allocation driver 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>
2013-04-29 16:17:12 -07:00