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path: root/drivers/iio/adc/at91-sama5d2_adc.c
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2017-10-23Merge 4.14-rc6 into staging-nextGreg Kroah-Hartman
We want the IIO and staging driver fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-10-14iio: adc: at91-sama5d2_adc: fix probe error on missing trigger propertyEugen Hristev
This fix allows platforms to probe correctly even if the trigger edge property is missing. The hardware trigger will no longer be registered in the sybsystem Preserves backwards compatibility with the support that was in the driver before the hardware trigger. https://storage.kernelci.org/mainline/master/v4.14-rc2-255-g74d83ec2b734/arm/sama5_defconfig/lab-free-electrons/boot-at91-sama5d2_xplained.txt Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com> Fixes: 5e1a1da0f ("iio: adc: at91-sama5d2_adc: add hw trigger and buffer support") Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-08-22iio:adc: drop assign iio_info.driver_module and iio_trigger_ops.ownerJonathan Cameron
The equivalent of both of these are now done via macro magic when the relevant register calls are made. The actual structure elements will shortly go away. Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
2017-07-09iio:adc:at91-sama5d2: make array startup_lookup static to reduce code sizeColin Ian King
Making the const array startup_lookup static rather having it on the stack saves 69 bytes. Add in missing int specifier to clean up a checkpatch warning. Before: text data bss dec hex filename 10297 2800 128 13225 33a9 drivers/iio/adc/at91-sama5d2_adc.o After: text data bss dec hex filename 10140 2888 128 13156 3364 drivers/iio/adc/at91-sama5d2_adc.o Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-01iio: adc: at91-sama5d2_adc: add support for suspend/resume functionalityEugen Hristev
Added support for suspend/resume functionality for the ADC IP in sama5d2 SoC. In order to enter Suspend to ram mode (backup + self refresh mode for memory), in which the ADC IP is no longer powered, we need to reset the pins to default state, for the scenario when they are also used for I2C bus to communicate with the PMIC. On resume, we need to reconfigure the ADC IP registers and reconfigure the trigger registers in the case when the suspend procedure is done while sysfs has the buffer and trigger enabled. In the case the suspend happens exactly during a software triggered conversion, the request will time out, because we reset and power down the ADC. Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-07-01iio: adc: at91-sama5d2_adc: add hw trigger and buffer supportEugen Hristev
Added support for the external hardware trigger on pin ADTRG, integrated the three possible edges into the driver and created buffer management for data retrieval Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com> Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-05-09Merge 4.6-rc7 into staging-nextGreg Kroah-Hartman
This fixes some merge issues with some iio drivers that were found in linux-next. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-04-18iio:adc:at91-sama5d2: Repair crash on module removalMarek Vasut
The driver never calls platform_set_drvdata() , so platform_get_drvdata() in .remove returns NULL and thus $indio_dev variable in .remove is NULL. Then it's only a matter of dereferencing the indio_dev variable to make the kernel blow as seen below. This patch adds the platform_set_drvdata() call to fix the problem. root@armhf:~# rmmod at91-sama5d2_adc Unable to handle kernel NULL pointer dereference at virtual address 000001d4 pgd = dd57c000 [000001d4] *pgd=00000000 Internal error: Oops: 5 [#1] ARM Modules linked in: at91_sama5d2_adc(-) CPU: 0 PID: 1334 Comm: rmmod Not tainted 4.6.0-rc3-next-20160418+ #3 Hardware name: Atmel SAMA5 task: dd4fcc40 ti: de910000 task.ti: de910000 PC is at mutex_lock+0x4/0x24 LR is at iio_device_unregister+0x14/0x6c pc : [<c05f4624>] lr : [<c0471f74>] psr: a00d0013 sp : de911f00 ip : 00000000 fp : be898bd8 r10: 00000000 r9 : de910000 r8 : c0107724 r7 : 00000081 r6 : bf001048 r5 : 000001d4 r4 : 00000000 r3 : bf000000 r2 : 00000000 r1 : 00000004 r0 : 000001d4 Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 10c53c7d Table: 3d57c059 DAC: 00000051 Process rmmod (pid: 1334, stack limit = 0xde910208) Stack: (0xde911f00 to 0xde912000) 1f00: bf000000 00000000 df5c7e10 bf000010 bf000000 df5c7e10 df5c7e10 c0351ca8 1f20: c0351c84 df5c7e10 bf001048 c0350734 bf001048 df5c7e10 df5c7e44 c035087c 1f40: bf001048 7f62dd4c 00000800 c034fb30 bf0010c0 c0158ee8 de910000 31397461 1f60: 6d61735f 32643561 6364615f 00000000 de911f90 de910000 de910000 00000000 1f80: de911fb0 10c53c7d de911f9c c05f33d8 de911fa0 00910000 be898ecb 7f62dd10 1fa0: 00000000 c0107560 be898ecb 7f62dd10 7f62dd4c 00000800 6f844800 6f844800 1fc0: be898ecb 7f62dd10 00000000 00000081 00000000 7f62dd10 be898bd8 be898bd8 1fe0: b6eedab1 be898b6c 7f61056b b6eedab6 000d0030 7f62dd4c 00000000 00000000 [<c05f4624>] (mutex_lock) from [<c0471f74>] (iio_device_unregister+0x14/0x6c) [<c0471f74>] (iio_device_unregister) from [<bf000010>] (at91_adc_remove+0x10/0x3c [at91_sama5d2_adc]) [<bf000010>] (at91_adc_remove [at91_sama5d2_adc]) from [<c0351ca8>] (platform_drv_remove+0x24/0x3c) [<c0351ca8>] (platform_drv_remove) from [<c0350734>] (__device_release_driver+0x84/0x110) [<c0350734>] (__device_release_driver) from [<c035087c>] (driver_detach+0x8c/0x90) [<c035087c>] (driver_detach) from [<c034fb30>] (bus_remove_driver+0x4c/0xa0) [<c034fb30>] (bus_remove_driver) from [<c0158ee8>] (SyS_delete_module+0x110/0x1d0) [<c0158ee8>] (SyS_delete_module) from [<c0107560>] (ret_fast_syscall+0x0/0x3c) Code: e3520001 1affffd5 eafffff4 f5d0f000 (e1902f9f) ---[ end trace 86914d7ad3696fca ]--- Signed-off-by: Marek Vasut <marex@denx.de> Cc: Ludovic Desroches <ludovic.desroches@atmel.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-04-03iio:adc:at91-sama5d2: add support for differential conversionsLudovic Desroches
Add signed differential channels and update the voltage scale for differential conversions. Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-04-03iio:adc:at91-sama5d2: cleanup mode register useLudovic Desroches
Do not erase previous configuration of the mode register when setting the sampling frequency. Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-03-05iio:adc:at91-sama5d2: fix identationLudovic Desroches
Remove some extra tabs. Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-03-05iio:adc:at91-sama5d2: fix typoLudovic Desroches
Fix typo in the name of a macro. Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-01-23iio:adc:at91-sama5d2: code cleanupLudovic Desroches
Use var type for sizeof argument instead of the struct name. Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-01-23iio:adc:at91-sama5d2: fix vref_uv typeLudovic Desroches
vref_uv has to be an int. Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Reported-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-01-16iio:adc:at91_adc8xx: introduce new atmel adc driverLudovic Desroches
This driver supports the new version of the Atmel ADC device introduced with the SAMA5D2 SoC family. Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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