Commit graph

20 commits

Author SHA1 Message Date
Uwe Kleine-König fd820a1ec7 memory: omap-gpmc: dump "before" state before first modification
When gpmc_cs_show_timings is called in gpmc_cs_set_timings()
gpmc_cs_program_settings() was already run which modifies the CONFIG1
register. So to be more useful do the "before" dump earlier.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-10-12 16:23:34 -07:00
Linus Torvalds 50686e8a3a ARM: SoC platform updates for v4.3
New or improved SoC support:
 
 - Addition of support for Atmel's SAMA5D2 SoC
 - Addition of Freescale i.MX6UL
 - Improved support of TI's DM814x platform
 - Misc fixes and improvements for RockChip platforms
 - Marvell MVEBU suspend/resume support
 
 A few driver changes that ideally would belong in the drivers branch are
 also here (acked by appropriate maintainers):
 
 - Power key input driver for Freescale platforms (svns)
 - RTC driver updates for Freescale platforms (svns/mxc)
 - Clk fixes for TI DM814/816X
 
 + a bunch of other changes for various platforms
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Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC platform updates from Olof Johansson:
 "New or improved SoC support:

   - add support for Atmel's SAMA5D2 SoC
   - add support for Freescale i.MX6UL
   - improved support for TI's DM814x platform
   - misc fixes and improvements for RockChip platforms
   - Marvell MVEBU suspend/resume support

  A few driver changes that ideally would belong in the drivers branch
  are also here (acked by appropriate maintainers):

   - power key input driver for Freescale platforms (svns)
   - RTC driver updates for Freescale platforms (svns/mxc)
   - clk fixes for TI DM814/816X

  + a bunch of other changes for various platforms"

* tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (83 commits)
  ARM: rockchip: pm: Fix PTR_ERR() argument
  ARM: imx: mach-imx6ul: Fix allmodconfig build
  clk: ti: fix for definition movement
  ARM: uniphier: drop v7_invalidate_l1 call at secondary entry
  memory: kill off set_irq_flags usage
  rtc: snvs: select option REGMAP_MMIO
  ARM: brcmstb: select ARCH_DMA_ADDR_T_64BIT for LPAE
  ARM: BCM: Enable ARM erratum 798181 for BRCMSTB
  ARM: OMAP2+: Fix power domain operations regression caused by 81xx
  ARM: rockchip: enable PMU_GPIOINT_WAKEUP_EN when entering shallow suspend
  ARM: rockchip: set correct stabilization thresholds in suspend
  ARM: rockchip: rename osc_switch_to_32k variable
  ARM: imx6ul: add fec MAC refrence clock and phy fixup init
  ARM: imx6ul: add fec bits to GPR syscon definition
  rtc: mxc: add support of device tree
  dt-binding: document the binding for mxc rtc
  rtc: mxc: use a second rtc clock
  ARM: davinci: cp_intc: use IRQCHIP_SKIP_SET_WAKE instead of irq_set_wake callback
  soc: mediatek: Fix SCPSYS compilation
  ARM: at91/soc: add basic support for new sama5d2 SoC
  ...
2015-09-01 12:18:40 -07:00
Rob Herring ed293d1ad2 memory: kill off set_irq_flags usage
set_irq_flags is ARM specific with custom flags which have genirq
equivalents. Convert drivers to use the genirq interfaces directly, so we
can kill off set_irq_flags. The translation of flags is as follows:

IRQF_VALID -> !IRQ_NOREQUEST
IRQF_PROBE -> !IRQ_NOPROBE
IRQF_NOAUTOEN -> IRQ_NOAUTOEN

For IRQs managed by an irqdomain, the irqdomain core code handles clearing
and setting IRQ_NOREQUEST already, so there is no need to do this in
.map() functions and we can simply remove the set_irq_flags calls. Some
users also set IRQ_NOPROBE and this has been maintained although it is not
clear that is really needed. There appears to be a great deal of blind
copy and paste of this code.

Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Roger Quadros <rogerq@ti.com>
Cc: linux-omap@vger.kernel.org
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-08-13 00:48:52 -07:00
Tomeu Vizoso e984a1791a memory: omap-gpmc: Don't try to save uninitialized GPMC context
If for some reason the GPMC device hasn't been probed yet, gpmc_base is
going to be NULL. Because there's no context yet to be saved, just turn
these functions into no-ops until that device gets probed.

Unable to handle kernel NULL pointer dereference at virtual address 00000010
pgd = c0204000
[00000010] *pgd=00000000
Internal error: Oops: 5 [#1] SMP ARM
Modules linked in:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.2.0-rc5-next-20150804-05947-g23f38fe8eda9 #1
Hardware name: Generic OMAP3-GP (Flattened Device Tree)
task: c0e623e8 ti: c0e5c000 task.ti: c0e5c000
PC is at omap3_gpmc_save_context+0x8/0xc4
LR is at omap_sram_idle+0x154/0x23c
pc : [<c087c7ac>]    lr : [<c023262c>]    psr: 60000193
sp : c0e5df40  ip : c0f92a80  fp : c0999eb0
r10: c0e57364  r9 : c0e66f14  r8 : 00000003
r7 : 00000000  r6 : 00000003  r5 : 00000000  r4 : c0f5f174
r3 : c0fa4fe8  r2 : 00000000  r1 : 00000000  r0 : fa200280
Flags: nZCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
Control: 10c5387d  Table: 80204019  DAC: 00000015
Process swapper/0 (pid: 0, stack limit = 0xc0e5c220)
Stack: (0xc0e5df40 to 0xc0e5e000)
df40: 00000000 c0e66ef8 c0f5f1a4 00000000 00000003 c02333a4 c3813822 00000000
df60: 00000000 c0e5a5c8 cfb8a5d0 c07f0c44 0e4f1d7e 00000000 00000000 00000000
df80: c3813822 00000000 cfb8a5d0 c0e5e4e4 cfb8a5d0 c0e66f14 c0e5a5c8 c0e5e54c
dfa0: c0e5e544 c0e57364 c0999eb0 c0277758 000000fa c0f5d000 00000000 c0d61c18
dfc0: ffffffff ffffffff 00000000 c0d61674 00000000 c0df7a48 00000000 c0f5d5d4
dfe0: c0e5e4c0 c0df7a44 c0e634f8 80204059 00000000 8020807c 00000000 00000000
[<c087c7ac>] (omap3_gpmc_save_context) from [<c023262c>] (omap_sram_idle+0x154/0x23c)
[<c023262c>] (omap_sram_idle) from [<c02333a4>] (omap3_enter_idle_bm+0xec/0x1a8)
[<c02333a4>] (omap3_enter_idle_bm) from [<c07f0c44>] (cpuidle_enter_state+0xbc/0x284)
[<c07f0c44>] (cpuidle_enter_state) from [<c0277758>] (cpu_startup_entry+0x174/0x24c)
[<c0277758>] (cpu_startup_entry) from [<c0d61c18>] (start_kernel+0x358/0x3c0)
[<c0d61c18>] (start_kernel) from [<8020807c>] (0x8020807c)
Code: c0ccace8 c0ccacc0 e59f30b4 e5932000 (e5921010)

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Suggested-by: Javier Martinez Canillas <javier@dowhile0.org>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Roger Quadros <rogerq@ti.com>
[tony@atomide.com: updated description as suggested by Javier]
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-08-12 01:43:49 -07:00
Tony Lindgren ae745302c0 Merge branch 'fixes-rc1' into omap-for-v4.2/fixes 2015-07-06 05:33:17 -07:00
Tony Lindgren 63aa945b10 memory: omap-gpmc: Add Kconfig option for debug
We support decoding the bootloader values if DEBUG is defined.
But we also need to change the struct omap_hwmod flags to have
HWMOD_INIT_NO_RESET to avoid the GPMC being reset during the
boot. Otherwise just the default timings will be displayed
instead of the bootloader configured timings.

This also allows us to clean up the various GPMC related
hwmod flags. For debugging, we only need HWMOD_INIT_NO_RESET,
and HWMOD_INIT_NO_IDLE is not needed.

Cc: Brian Hutchinson <b.hutchman@gmail.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2015-06-01 19:22:10 -06:00
Tony Lindgren 28a7eedd11 memory: omap-gpmc: Fix parsing of devices
We currently artificially limit the parsing of GPMC connected
devices based on the device name. Let's stop doing that, it's
confusing as adding devices to .dts files with using normal
names like fpga and usb will currently cause them to not probe.

Cc: Roger Quadros <rogerq@ti.com>
Reported-by: Brian Hutchinson <b.hutchman@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-06-01 15:00:44 -07:00
Robert ABEL 4b613e9b4b ARM OMAP2+ GPMC: fix programming/showing reserved timing parameters
GPMC_CONFIG1_i parameters CLKACTIVATIONTIME and WAITMONITORINGTIME
have reserved values.
Raise an error if calculated timings try to program reserved values.

GPMC_CONFIG1_i ATTACHEDDEVICEPAGELENGTH and DEVICESIZE were already checked
when parsing the DT.

Explicitly comment invalid values on gpmc_cs_show_timings for
-CLKACTIVATIONTIME
-WAITMONITORINGTIME
-DEVICESIZE
-ATTACHEDDEVICEPAGELENGTH

Signed-off-by: Robert ABEL <rabel@cit-ec.uni-bielefeld.de>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
2015-03-06 12:55:32 +02:00
Robert ABEL 7f2e8c58ae ARM OMAP2+ GPMC: fix WAITMONITORINGTIME divider bug
The WAITMONITORINGTIME is expressed as a number of GPMC_CLK clock cycles,
even though the access is defined as asynchronous, and no GPMC_CLK clock
is provided to the external device. Still, GPMCFCLKDIVIDER is used as a divider
for the GPMC clock, so it must be programmed to define the
correct WAITMONITORINGTIME delay.

This patch correctly computes WAITMONITORINGTIME in GPMC_CLK cycles instead of GPMC_FCLK cycles,
both during programming (gpmc_cs_set_timings) and during retrieval (gpmc_cs_show_timings).

Signed-off-by: Robert ABEL <rabel@cit-ec.uni-bielefeld.de>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
2015-03-06 12:46:06 +02:00
Robert ABEL 2e67690137 ARM OMAP2+ GPMC: calculate GPMCFCLKDIVIDER based on WAITMONITORINGTIME
The WAITMONITORINGTIME is expressed as a number of GPMC_CLK clock cycles,
even though the access is defined as asynchronous, and no GPMC_CLK clock
is provided to the external device. Still, GPMCFCLKDIVIDER is used as a divider
for the GPMC clock, so it must be programmed to define the
correct WAITMONITORINGTIME delay.

Calculate GPMCFCLKDIVIDER independent of gpmc,sync-clk-ps in DT for
pure asynchronous accesses, i.e. both read and write asynchronous.

Signed-off-by: Robert ABEL <rabel@cit-ec.uni-bielefeld.de>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
2015-03-06 12:39:48 +02:00
Robert ABEL f585070b91 ARM OMAP2+ GPMC: always program GPMCFCLKDIVIDER
The WAITMONITORINGTIME is expressed as a number of GPMC_CLK clock cycles,
even though the access is defined as asynchronous, and no GPMC_CLK clock
is provided to the external device. Still, GPMCFCLKDIVIDER is used as a divider
for the GPMC clock, so it must be programmed to define the
correct WAITMONITORINGTIME delay.

Signed-off-by: Robert ABEL <rabel@cit-ec.uni-bielefeld.de>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
2015-03-06 12:35:45 +02:00
Robert ABEL 563dbb260d ARM OMAP2+ GPMC: change get_gpmc_timing_reg output for DTS
DTS output was formatted to require additional work when copy-pasting into DTS.
Nano-second timings were replaced with interval of values that produce the same
number of clock ticks.

Signed-off-by: Robert ABEL <rabel@cit-ec.uni-bielefeld.de>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
2015-03-06 12:34:28 +02:00
Robert ABEL 2affc816df ARM OMAP2+ GPMC: fix debug output alignment
GPMC debug output is aligned to 10 characters for field names.
However, some fields have bigger names, screwing up the alignment.
Consequently, alignment was changed to longest field name (17 chars) for now.

Signed-off-by: Robert ABEL <rabel@cit-ec.uni-bielefeld.de>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
2015-03-06 12:23:21 +02:00
Robert ABEL b1dc1ca9d4 ARM OMAP2+ GPMC: add bus children
This patch adds support for spawning buses as children of the GPMC.

Signed-off-by: Robert ABEL <rabel@cit-ec.uni-bielefeld.de>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
2015-03-06 12:22:25 +02:00
Robert ABEL 5e9444d9a0 ARM OMAP2+ GPMC: don't undef DEBUG
OMAP2+ GPMC driver undefines DEBUG, which makes it unnecessarily
hard to turn DEBUG on. Remove the offending lines.

Signed-off-by: Robert ABEL <rabel@cit-ec.uni-bielefeld.de>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
2015-03-06 12:15:20 +02:00
Semen Protsenko 2e25b0ecf6 ARM: OMAP2+: gpmc: make gpmc_cs_get_name() static
Fix sparse warning:
  warning: symbol 'gpmc_cs_get_name' was not declared. Should it be static?

Signed-off-by: Semen Protsenko <semen.protsenko@globallogic.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
2015-02-25 12:47:32 +02:00
Semen Protsenko 9c4f757ee9 ARM: OMAP2+: gpmc: Fix writing in gpmc_cs_set_memconf
Some GPMC_CONFIG7 register bits marked as "RESERVED", means they
shouldn't be overwritten. A typical approach to handle such bits called
"Read-Modify-Write". Writing procedure used in gpmc_cs_set_memconf()
utilizes RMW technique, but implemented incorrectly. Due to obvious typo
in code read register value is being rewritten by another value, which
leads to loss of read RESERVED bits. This patch fixes this.

While at it, replace magic numbers with named constants to improve code
readability.

Signed-off-by: Semen Protsenko <semen.protsenko@globallogic.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
2015-02-25 12:47:32 +02:00
Linus Torvalds e6b5be2be4 Driver core patches for 3.19-rc1
Here's the set of driver core patches for 3.19-rc1.
 
 They are dominated by the removal of the .owner field in platform
 drivers.  They touch a lot of files, but they are "simple" changes, just
 removing a line in a structure.
 
 Other than that, a few minor driver core and debugfs changes.  There are
 some ath9k patches coming in through this tree that have been acked by
 the wireless maintainers as they relied on the debugfs changes.
 
 Everything has been in linux-next for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core update from Greg KH:
 "Here's the set of driver core patches for 3.19-rc1.

  They are dominated by the removal of the .owner field in platform
  drivers.  They touch a lot of files, but they are "simple" changes,
  just removing a line in a structure.

  Other than that, a few minor driver core and debugfs changes.  There
  are some ath9k patches coming in through this tree that have been
  acked by the wireless maintainers as they relied on the debugfs
  changes.

  Everything has been in linux-next for a while"

* tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits)
  Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries"
  fs: debugfs: add forward declaration for struct device type
  firmware class: Deletion of an unnecessary check before the function call "vunmap"
  firmware loader: fix hung task warning dump
  devcoredump: provide a one-way disable function
  device: Add dev_<level>_once variants
  ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries
  ath: use seq_file api for ath9k debugfs files
  debugfs: add helper function to create device related seq_file
  drivers/base: cacheinfo: remove noisy error boot message
  Revert "core: platform: add warning if driver has no owner"
  drivers: base: support cpu cache information interface to userspace via sysfs
  drivers: base: add cpu_device_create to support per-cpu devices
  topology: replace custom attribute macros with standard DEVICE_ATTR*
  cpumask: factor out show_cpumap into separate helper function
  driver core: Fix unbalanced device reference in drivers_probe
  driver core: fix race with userland in device_add()
  sysfs/kernfs: make read requests on pre-alloc files use the buffer.
  sysfs/kernfs: allow attributes to request write buffer be pre-allocated.
  fs: sysfs: return EGBIG on write if offset is larger than file size
  ...
2014-12-14 16:10:09 -08:00
Linus Torvalds fe78c54b47 ARM: SoC/OMAP GPMC driver cleanup and move for 3.19
The GPMC driver has traditionally been considered a part of the
 OMAP platform code and tightly interweaved with some of the boards.
 
 With this cleanup, it has finally come to the point where it makes
 sense to move it out of arch/arm into drivers/memory, where we already
 have other drivers for similar hardware. The cleanups are still
 ongoing, with the goal of eventually having a standalone driver
 that does not require an interface to architecture code.
 
 This is a separate branch because of dependencies on multiple other
 branches, and to keep the drivers changes separate from the normal
 cleanups.
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Merge tag 'omap-gpmc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC/OMAP GPMC driver cleanup and move from Arnd Bergmann:
 "The GPMC driver has traditionally been considered a part of the OMAP
  platform code and tightly interweaved with some of the boards.

  With this cleanup, it has finally come to the point where it makes
  sense to move it out of arch/arm into drivers/memory, where we already
  have other drivers for similar hardware.  The cleanups are still
  ongoing, with the goal of eventually having a standalone driver that
  does not require an interface to architecture code.

  This is a separate branch because of dependencies on multiple other
  branches, and to keep the drivers changes separate from the normal
  cleanups"

* tag 'omap-gpmc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  memory: gpmc: Move omap gpmc code to live under drivers
  ARM: OMAP2+: Move GPMC initcall to devices.c
  ARM: OMAP2+: Prepare to move GPMC to drivers by platform data header
  ARM: OMAP2+: Remove unnecesary include in GPMC driver
  ARM: OMAP2+: Drop board file for 3430sdp
  ARM: OMAP2+: Drop board file for ti8168evm
  ARM: OMAP2+: Drop legacy code for gpmc-smc91x.c
  ARM: OMAP2+: Require proper GPMC timings for devices
  ARM: OMAP2+: Show bootloader GPMC timings to allow configuring the .dts file
  ARM: OMAP2+: Fix support for multiple devices on a GPMC chip select
  ARM: OMAP2+: gpmc: Sanity check GPMC fck on probe
  ARM: OMAP2+: gpmc: Keep Chip Select disabled while configuring it
  ARM: OMAP2+: gpmc: Always enable A26-A11 for non NAND devices
  ARM: OMAP2+: gpmc: Error out if timings fail in gpmc_probe_generic_child()
  ARM: OMAP2+: gpmc: Print error message in set_gpmc_timing_reg()
2014-12-09 16:57:56 -08:00
Tony Lindgren 1864019379 memory: gpmc: Move omap gpmc code to live under drivers
Just move to drivers as further clean-up can now happen there
finally.

Let's also add Roger and me to the MAINTAINERS so we get
notified for any patches related to GPMC.

Cc: Arnd Bergmann <arnd@arndb.de>
Acked-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-28 12:54:39 -08:00
Renamed from arch/arm/mach-omap2/gpmc.c (Browse further)