Hi,
This patch series contains several miscellaneous and DMA improvements
for the Renesas "SCI" serial driver. The goal is to prepare for enabling
DMA on DT-based R-Car Gen2 SoCs.
This series contains preparatory patches that have been sent before
(change logs in the individual patches), or are fairly simple, and thus
considered safe for applying.
The "RFC" patches actually enabling DMA will be sent in a separate
series ("[PATCH/RFC v3 0/4] serial: sh-sci: Add DT DMA support").
Note that SCI DMA support was originally written for SH-based systems,
and was never fully wired up in platform code in mainline, so the risk
for regressions is fairly small.
Thanks!
References:
- [PATCH/RFC v2 00/29] serial: sh-sci: Miscellaneous and DMA
Improvements (http://www.spinics.net/lists/linux-sh/msg43567.html)
- [PATCH/RFC 0/8] serial: sh-sci: Add DT DMA support
(http://www.spinics.net/lists/linux-sh/msg42258.html)
- [PATCH/RFC 00/13] serial: sh-sci: Cleanups and bug fixes
(http://www.spinics.net/lists/linux-serial/msg17122.html)
Geert Uytterhoeven (29):
serial: sh-sci: Replace buggy big #ifdef by runtime logic
serial: sh-sci: Prevent compiler warnings on 64-bit
serial: sh-sci: Correct SCIF_ERROR_CLEAR for plain SCIF
serial: sh-sci: Use SCIF_DR instead of hardcoded literal 1
serial: sh-sci: Use SCSMR_CKS instead of hardcoded literal 3
serial: sh-sci: Drop path in reference to serial_core.c
serial: sh-sci: Improve readability of sampling rate configuration
serial: sh-sci: Make sci_irq_desc[] const
serial: sh-sci: Make sci_regmap[] const
serial: sh-sci: Remove useless memory allocation failure printks
serial: sh-sci: Remove bogus sci_handle_fifo_overrun() call on (H)SCIF
serial: sh-sci: Improve DMA error messages
serial: sh-sci: Improve comments for DMA timeout calculation
serial: sh-sci: Handle DMA init failures inside sci_request_dma()
serial: sh-sci: Use correct device for DMA mapping with IOMMU
serial: sh-sci: Use min_t()/max_t() instead of casts
serial: sh-sci: Switch to dma_map_single() for DMA transmission
serial: sh-sci: Fix TX buffer mapping leak
serial: sh-sci: Use DMA submission helpers instead of open-coding
serial: sh-sci: Switch to generic DMA residue handling
serial: sh-sci: Stop acknowledging DMA transmit completions
serial: sh-sci: Simplify sci_submit_rx() error handling
serial: sh-sci: Do not resubmit DMA descriptors
serial: sh-sci: Fix race condition between RX worker and cleanup
serial: sh-sci: Pass scatterlist to sci_dma_rx_push()
serial: sh-sci: Use tty_insert_flip_string() for DMA receive
serial: sh-sci: Use incrementing pointers instead of stack array
serial: sh-sci: Don't call sci_rx_interrupt() on error when using DMA
serial: sh-sci: Don't call sci_dma_rx_push() if no data has arrived
Kazuya Mizuguchi (1):
serial: sh-sci: Fix exclusion of work_fn_rx and sci_dma_rx_complete
Yoshihiro Shimoda (3):
serial: sh-sci: Return IRQ_HANDLED when overrun if detected
serial: sh-sci: Fix NULL pointer dereference if HIGHMEM is enabled
serial: sh-sci: Don't kick tx in sci_er_interrupt() when using DMA
drivers/tty/serial/Kconfig | 2 +-
drivers/tty/serial/sh-sci.c | 416 ++++++++++++++++++++++++--------------------
drivers/tty/serial/sh-sci.h | 49 ++----
3 files changed, 241 insertions(+), 226 deletions(-)
--
1.9.1
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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