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| author |   Gerald Baeza <gerald.baeza@stericsson.com> | 2012-09-21 21:21:37 +0200 |
|---|---|---|
| committer |   Fabio Baltieri <fabio.baltieri@linaro.org> | 2013-01-14 10:50:44 +0100 |
| commit | 47db92f4a63499b1605b4c66f9347ba5479e7b19 (patch) | |
| tree | a3e9510a1b3cec21147f11641f09bd984c2afb0a /include/linux/platform_data/dma-ste-dma40.h | |
| parent | dmaengine: ste_dma40: support fixed physical channel allocation (diff) | |
| download | linux-dev-47db92f4a63499b1605b4c66f9347ba5479e7b19.tar.xz linux-dev-47db92f4a63499b1605b4c66f9347ba5479e7b19.zip | |
dmaengine: ste_dma40: physical channels number correction
DMAC_ICFG[0:2]=SCHNB only allows to count 'multiple of 4' physical
channels so it was ok with platforms having 8 channels but cannot be
used for next versions (with 10 or 14 channels). This patch allows to
provide the number of physical channels for a DMA device via
platform_data, or still rely on SCHNB if platform_data announces 0
channel.
Signed-off-by: Gerald Baeza <gerald.baeza@stericsson.com>
Reviewed-by: Per Forlin <per.forlin@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Diffstat (limited to '')
| -rw-r--r-- | include/linux/platform_data/dma-ste-dma40.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/platform_data/dma-ste-dma40.h b/include/linux/platform_data/dma-ste-dma40.h index 9ff93b065686..833cb959f3df 100644 --- a/include/linux/platform_data/dma-ste-dma40.h +++ b/include/linux/platform_data/dma-ste-dma40.h @@ -147,6 +147,9 @@ struct stedma40_chan_cfg { * @memcpy_conf_log: default configuration of logical channel memcpy * @disabled_channels: A vector, ending with -1, that marks physical channels * that are for different reasons not available for the driver. + * @num_of_phy_chans: The number of physical channels implemented in HW. + * 0 means reading the number of channels from DMA HW but this is only valid + * for 'multiple of 4' channels, like 8. */ struct stedma40_platform_data { u32 dev_len; @@ -158,6 +161,7 @@ struct stedma40_platform_data { struct stedma40_chan_cfg *memcpy_conf_log; int disabled_channels[STEDMA40_MAX_PHYS]; bool use_esram_lcla; + int num_of_phy_chans; }; #ifdef CONFIG_STE_DMA40 |