Commit Graph

12 Commits

Author SHA1 Message Date
Mike Turquette
cdae1730d0 Merge branch 'clk-fixes' into clk-next 2014-07-03 11:55:42 -07:00
Karol Wrona
89ed7e6e68 clk: s2mps11: Fix clk_ops
s2mps11 clocks had registered callbacks for prepare ,unprepare and is_enabled.
During disabling unused clocks the lack of is_prepared caused that unused
s2mps11 clocks were not unprepared and stayed active.

Regmap_read is cached so it can be called in is_prepare callback
to achieve this information. Enabled field was removed from struct s2mps11_clk.

Signed-off-by: Karol Wrona <k.wrona@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-07-02 09:44:47 -07:00
Krzysztof Kozlowski
2a96dfa49c clk: s2mps11: Fix double free corruption during driver unbind
After unbinding the driver memory was corrupted by double free of
clk_lookup structure. This lead to OOPS when re-binding the driver
again.

The driver allocated memory for 'clk_lookup' with devm_kzalloc. During
driver removal this memory was freed twice: once by clkdev_drop() and
second by devm code.

Kernel panic log:
[   30.839284] Unable to handle kernel paging request at virtual address 5f343173
[   30.846476] pgd = dee14000
[   30.849165] [5f343173] *pgd=00000000
[   30.852703] Internal error: Oops: 805 [#1] PREEMPT SMP ARM
[   30.858166] Modules linked in:
[   30.861208] CPU: 0 PID: 1 Comm: bash Not tainted 3.16.0-rc2-00239-g94bdf617b07e-dirty #40
[   30.869364] task: df478000 ti: df480000 task.ti: df480000
[   30.874752] PC is at clkdev_add+0x2c/0x38
[   30.878738] LR is at clkdev_add+0x18/0x38
[   30.882732] pc : [<c0350908>]    lr : [<c03508f4>]    psr: 60000013
[   30.882732] sp : df481e78  ip : 00000001  fp : c0700ed8
[   30.894187] r10: 0000000c  r9 : 00000000  r8 : c07b0e3c
[   30.899396] r7 : 00000002  r6 : df45f9d0  r5 : df421390  r4 : c0700d6c
[   30.905906] r3 : 5f343173  r2 : c0700d84  r1 : 60000013  r0 : c0700d6c
[   30.912417] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
[   30.919534] Control: 10c53c7d  Table: 5ee1406a  DAC: 00000015
[   30.925262] Process bash (pid: 1, stack limit = 0xdf480240)
[   30.930817] Stack: (0xdf481e78 to 0xdf482000)
[   30.935159] 1e60:                                                       00001000 df6de610
[   30.943321] 1e80: df7f4558 c0355650 c05ec6ec c0700eb0 df6de600 df7f4510 dec9d69c 00000014
[   30.951480] 1ea0: 00167b48 df6de610 c0700e30 c0713518 00000000 c0700e30 dec9d69c 00000006
[   30.959639] 1ec0: 00167b48 c02c1b7c c02c1b64 df6de610 c07aff48 c02c0420 c06fb150 c047cc20
[   30.967798] 1ee0: df6de610 df6de610 c0700e30 df6de644 c06fb150 0000000c dec9d690 c02bef90
[   30.975957] 1f00: dec9c6c0 dece4c00 df481f80 dece4c00 0000000c c02be73c 0000000c c016ca8c
[   30.984116] 1f20: c016ca48 00000000 00000000 c016c1f4 00000000 00000000 b6f18000 df481f80
[   30.992276] 1f40: df7f66c0 0000000c df480000 df480000 b6f18000 c011094c df47839c 60000013
[   31.000435] 1f60: 00000000 00000000 df7f66c0 df7f66c0 0000000c df480000 b6f18000 c0110dd4
[   31.008594] 1f80: 00000000 00000000 0000000c b6ec05d8 0000000c b6f18000 00000004 c000f2a8
[   31.016753] 1fa0: 00001000 c000f0e0 b6ec05d8 0000000c 00000001 b6f18000 0000000c 00000000
[   31.024912] 1fc0: b6ec05d8 0000000c b6f18000 00000004 0000000c 00000001 00000000 00167b48
[   31.033071] 1fe0: 00000000 bed83a80 b6e004f0 b6e5122c 60000010 00000001 ffffffff ffffffff
[   31.041248] [<c0350908>] (clkdev_add) from [<c0355650>] (s2mps11_clk_probe+0x2b4/0x3b4)
[   31.049223] [<c0355650>] (s2mps11_clk_probe) from [<c02c1b7c>] (platform_drv_probe+0x18/0x48)
[   31.057728] [<c02c1b7c>] (platform_drv_probe) from [<c02c0420>] (driver_probe_device+0x13c/0x384)
[   31.066579] [<c02c0420>] (driver_probe_device) from [<c02bef90>] (bind_store+0x88/0xd8)
[   31.074564] [<c02bef90>] (bind_store) from [<c02be73c>] (drv_attr_store+0x20/0x2c)
[   31.082118] [<c02be73c>] (drv_attr_store) from [<c016ca8c>] (sysfs_kf_write+0x44/0x48)
[   31.090016] [<c016ca8c>] (sysfs_kf_write) from [<c016c1f4>] (kernfs_fop_write+0xc0/0x17c)
[   31.098176] [<c016c1f4>] (kernfs_fop_write) from [<c011094c>] (vfs_write+0xa0/0x1c4)
[   31.105899] [<c011094c>] (vfs_write) from [<c0110dd4>] (SyS_write+0x40/0x8c)
[   31.112931] [<c0110dd4>] (SyS_write) from [<c000f0e0>] (ret_fast_syscall+0x0/0x3c)
[   31.120481] Code: e2842018 e584501c e1a00004 e885000c (e5835000)
[   31.126596] ---[ end trace efad45bfa3a61b05 ]---
[   31.131181] Kernel panic - not syncing: Fatal exception
[   31.136368] CPU1: stopping
[   31.139054] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G      D       3.16.0-rc2-00239-g94bdf617b07e-dirty #40
[   31.148697] [<c0016480>] (unwind_backtrace) from [<c0012950>] (show_stack+0x10/0x14)
[   31.156419] [<c0012950>] (show_stack) from [<c0480db8>] (dump_stack+0x80/0xcc)
[   31.163622] [<c0480db8>] (dump_stack) from [<c001499c>] (handle_IPI+0x130/0x15c)
[   31.170998] [<c001499c>] (handle_IPI) from [<c000862c>] (gic_handle_irq+0x60/0x68)
[   31.178549] [<c000862c>] (gic_handle_irq) from [<c0013480>] (__irq_svc+0x40/0x70)
[   31.186009] Exception stack(0xdf4bdf88 to 0xdf4bdfd0)
[   31.191046] df80:                   ffffffed 00000000 00000000 00000000 df4bc000 c06d042c
[   31.199207] dfa0: 00000000 ffffffed c06d03c0 00000000 c070c288 00000000 00000000 df4bdfd0
[   31.207363] dfc0: c0010324 c0010328 60000013 ffffffff
[   31.212402] [<c0013480>] (__irq_svc) from [<c0010328>] (arch_cpu_idle+0x28/0x30)
[   31.219783] [<c0010328>] (arch_cpu_idle) from [<c005f150>] (cpu_startup_entry+0x2c4/0x3f0)
[   31.228027] [<c005f150>] (cpu_startup_entry) from [<400086c4>] (0x400086c4)
[   31.234968] ---[ end Kernel panic - not syncing: Fatal exception

Fixes: 7cc560dea4 ("clk: s2mps11: Add support for s2mps11")
Cc: <stable@vger.kernel.org>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Yadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-07-01 21:56:49 -07:00
Krzysztof Kozlowski
e8b60a45a5 clk: s2mps11: Add support for S2MPS14 clocks
This patch adds support for S2MPS14 PMIC clocks (BT and AP) to the
s2mps11 clock driver.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Yadwinder Singh Brar <yadi.brar@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-05-23 15:44:03 -07:00
Krzysztof Kozlowski
7002483c7b clk: s2mps11: Remove useless check for clk_table
There is no need for checking if 'clk_table' is not NULL twice (first
after allocation and second at the end of probe()). Also move allocation
of this 'clk_table' to probe from s2mps11_clk_parse_dt as this is
logical place for it.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-05-23 15:44:03 -07:00
Krzysztof Kozlowski
bf416bd457 clk: s2mps11: Add missing of_node_put and of_clk_del_provider
Add of_clk_del_provider to remove previously registered clock provider.
Add of_node_put to decrement the ref count of clock nodes.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-05-23 15:44:02 -07:00
Krzysztof Kozlowski
afbd1a0c30 clk: s2mps11: Use of_get_child_by_name
of_find_node_by_name() walks over all nodes and can thus walk outside of
the parent node. Use of_get_child_by_name() instead.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-03-24 15:11:27 -07:00
Krzysztof Kozlowski
238e14055d clk: s2mps11: Fix possible NULL pointer dereference
If parent device does not have of_node set the s2mps11_clk_parse_dt()
returned NULL. This NULL was later passed to of_clk_add_provider() which
dereferenced it in pr_debug() call.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-03-24 15:11:27 -07:00
Tushar Behera
e8e6b840c4 clk: clk-s2mps11: Add support for clocks in S5M8767 MFD
Since clock operation within S2MPS11 and S5M8767 are similar, we can
support both the devices within a single driver.

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Reviewed-by: Yadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-03-18 17:13:24 -07:00
Tushar Behera
64d64c3573 clk: clk-s2mps11: Refactor for including support for other MFD clocks
The clocks in S2MPS11 and S5M8767 are managed in the same way, baring
a difference in the register offset. It would be better to update
existing S2MPS11 driver to support the clocks in S5M8767, rather than
creating an almost duplicate driver altogether.

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Reviewed-by: Yadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-03-18 17:13:16 -07:00
Krzysztof Kozlowski
1b1ccee1e8 mfd: s2mps11: Fix build after regmap field rename in sec-core.c
Fix building of s2mps11 regulator and clock drivers after renaming
regmap field in struct sec_pmic_dev in commit:
 - "mfd/rtc: s5m: Fix register updating by adding regmap for RTC"

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2013-12-16 11:30:39 +00:00
Yadwinder Singh Brar
7cc560dea4 clk: s2mps11: Add support for s2mps11
This patch adds support to register three(AP/CP/BT) buffered 32.768 KHz
outputs of mfd-s2mps11 with common clock framework.

Signed-off-by: Yadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-08-08 15:57:33 -07:00