linux-toradex.git/drivers, branch toradex_vf_4.1 Linux kernel for Apalis and Colibri modules Merge tag 'v4.1.39' into toradex_vf_4.1-next 2017-03-15T17:35:51+00:00 Stefan Agner stefan@agner.ch 2017-03-14T20:59:28+00:00 39ac0033f2345ce7b5d8ca4439192407dacb2355 Linux 4.1.39 
Linux 4.1.39
tty: serial: fsl_lpuart: resync with 4.9 kernel 2017-03-15T17:35:50+00:00 Bhuvanchandra DV bhuvanchandra.dv@toradex.com 2017-02-17T20:25:05+00:00 13f2767f31803754aa883f298737aff866f04628 This commit resyncs the driver changes with 4.9 kernel version of the driver. Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com> Signed-off-by: Stefan Agner <stefan.agner@toradex.com> 
This commit resyncs the driver changes with 4.9 kernel
version of the driver.

Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Merge tag 'v4.1.32' into toradex_vf_4.1-next 2017-03-15T17:35:47+00:00 Stefan Agner stefan@agner.ch 2016-09-16T20:17:38+00:00 6819e8267b359913b95ccc822ac267454f39a460 Linux 4.1.32 
Linux 4.1.32
Merge tag 'v4.1.24' into toradex_vf_4.1-next 2017-03-15T17:35:46+00:00 Stefan Agner stefan@agner.ch 2016-06-02T19:22:30+00:00 440ef98ad687b210dca17e5c5141b24738f04922 Linux 4.1.24 
Linux 4.1.24
tty: serial: fsl_lpuart: enable UART DMA by default 2017-03-15T17:35:45+00:00 Stefan Agner stefan.agner@toradex.com 2016-03-29T19:58:18+00:00 de1c77640710e1cca36091c8e6d7947bff2397e7 The new DMA implementation uses larger buffer sizes and avoids overflows in most situations. Enable DMA by default again. Signed-off-by: Stefan Agner <stefan.agner@toradex.com> Acked-by: Max Krummenacher <max.krummenacher@toradex.com> 
The new DMA implementation uses larger buffer sizes and avoids
overflows in most situations. Enable DMA by default again.

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Acked-by: Max Krummenacher <max.krummenacher@toradex.com>
tty: serial: fsl_lpuart: Fix broken 8m/s1 support 2017-03-15T17:35:45+00:00 Bhuvanchandra DV bhuvanchandra.dv@toradex.com 2016-03-29T13:14:45+00:00 fea9190a1f2c3c668eb302a462506fe5b5be1a40 Fix broken 8m/s1 support. Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com> Signed-off-by: Stefan Agner <stefan.agner@toradex.com> 
Fix broken 8m/s1 support.

Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
tty: serial: fsl-lpuart: Update suspend/resume for DMA mode 2017-03-15T17:35:44+00:00 Bhuvanchandra DV bhuvanchandra.dv@toradex.com 2016-03-29T13:14:43+00:00 a20ade1b6b78de3239b5b3f3055905fb65318acf When DMA mode is enabled one need to make sure the DMA channels are idle before entering suspend mode especially when UART ports which are set as wakeup source and console port with no_console_suspend is set. This patch takes care of gracefully releasing DMA channels for the above two cases and start the DMA at resume. Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com> Signed-off-by: Stefan Agner <stefan.agner@toradex.com> 
When DMA mode is enabled one need to make sure the DMA channels are
idle before entering suspend mode especially when UART ports which
are set as wakeup source and console port with no_console_suspend
is set. This patch takes care of gracefully releasing DMA channels
for the above two cases and start the DMA at resume.

Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
tty: serial: fsl-lpuart: Use scatter/gather DMA for Tx 2017-03-15T17:35:44+00:00 Bhuvanchandra DV bhuvanchandra.dv@toradex.com 2016-03-29T13:14:42+00:00 ea69a90b0338aa88e3e66cb6bd461f5504be0998 Drop PIO to DMA switching and use scatter/gather DMA for Tx path to improve performance. Some part of the code is borrowed from imx serial driver. Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com> Signed-off-by: Stefan Agner <stefan.agner@toradex.com> 
Drop PIO to DMA switching and use scatter/gather DMA for
Tx path to improve performance.

Some part of the code is borrowed from imx serial driver.

Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
tty: serial: fsl-lpuart: Use cyclic DMA for Rx 2017-03-15T17:35:43+00:00 Bhuvanchandra DV bhuvanchandra.dv@toradex.com 2016-03-29T13:14:41+00:00 216bc87a038700dadde79e05dbb7fa541e62fa8b The initial approach of DMA implementatin for RX is inefficient due to switching from PIO to DMA, this leads some times to overrun on lpuart ports with small FIFO. To address these issues this patch uses a cyclic DMA for receiver path. Some part of the code is borrowed from atmel serial driver. Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com> [updated DMA RX buffer size calculation] Signed-off-by: Stefan Agner <stefan.agner@toradex.com> 
The initial approach of DMA implementatin for RX is inefficient due to switching
from PIO to DMA, this leads some times to overrun on lpuart ports with small
FIFO. To address these issues this patch uses a cyclic DMA for receiver path.

Some part of the code is borrowed from atmel serial driver.

Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
[updated DMA RX buffer size calculation]
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Revert "tty: serial: fsl_lpuart: avoid TX FIFO overflow" 2017-03-15T17:32:33+00:00 Stefan Agner stefan@agner.ch 2016-06-02T19:09:14+00:00 846cc3722e825e87d06f05372523d052934dab94 This reverts commit ff81e6ebb2df8a12f95dfa77eb0f4540e8b1e217. Cleanup before backporting the better solution from the 4.4 kernel. Signed-off-by: Stefan Agner <stefan.agner@toradex.com> Acked-by: Max Krummenacher <max.krummenacher@toradex.com> 
This reverts commit ff81e6ebb2df8a12f95dfa77eb0f4540e8b1e217.

Cleanup before backporting the better solution from the 4.4 kernel.

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Acked-by: Max Krummenacher <max.krummenacher@toradex.com>