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| author | Marcin Wojtas <mw@semihalf.com> | 2016-03-14 09:38:56 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-03-14 12:19:45 -0400 |
| commit | eb43e023130b5021c1ffad4d5c84cb310ffcb0f6 (patch) | |
| tree | b56f01e32ba60c6ddeeb983d2e114c351bc602af /drivers/misc/sram.c | |
| parent | d3bf9b19ff06bdcc4aacdd6eb395c742138a9dc9 (diff) | |
| download | blackbird-obmc-linux-eb43e023130b5021c1ffad4d5c84cb310ffcb0f6.tar.gz blackbird-obmc-linux-eb43e023130b5021c1ffad4d5c84cb310ffcb0f6.zip | |
misc: sram: add optional ioremap without write combining
Some SRAM users may require non-bufferable access to the memory, which is
impossible, because devm_ioremap_wc() is used for setting sram->virt_base.
This commit adds optional flag 'no-memory-wc', which allow to choose remap
method, using DT property. Documentation is updated accordingly.
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/misc/sram.c')
| -rw-r--r-- | drivers/misc/sram.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/misc/sram.c b/drivers/misc/sram.c index 736dae715dbf..69cdabea9c03 100644 --- a/drivers/misc/sram.c +++ b/drivers/misc/sram.c @@ -360,7 +360,10 @@ static int sram_probe(struct platform_device *pdev) return -EBUSY; } - sram->virt_base = devm_ioremap_wc(sram->dev, res->start, size); + if (of_property_read_bool(pdev->dev.of_node, "no-memory-wc")) + sram->virt_base = devm_ioremap(sram->dev, res->start, size); + else + sram->virt_base = devm_ioremap_wc(sram->dev, res->start, size); if (IS_ERR(sram->virt_base)) return PTR_ERR(sram->virt_base); |
