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* spi: tegra: don't treat NULL clk as an errorJamie Iles2011-01-101-1/+1
| | | | | | | | | | Some platforms have been known to return NULL from clk_get() if they support only a single struct clk. Whilst tegra doesn't do this, make the drivers consistent with others. Signed-off-by: Jamie Iles <jamie@jamieiles.com> Acked-by: Russell King <linux@arm.linux.org.uk> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* spi: tegra: fix error setting on timeoutErik Gilling2010-10-251-4/+4
| | | | | | | avoids derefencing an uninitialized pointer Change-Id: Icf528441ae481e9f6f5ddc0be32c7c217fa49701 Signed-off-by: Erik Gilling <konkers@android.com>
* spi: add spi_tegra driverErik Gilling2010-10-211-0/+618
v2 changes: from Thierry Reding: * add "select TEGRA_SYSTEM_DMA" to Kconfig from Grant Likely: * add oneline description to header * inline references to DRIVER_NAME * inline references to BUSY_TIMEOUT * open coded bytes_per_word() * spi_readl/writel -> spi_tegra_readl/writel * move transfer validation to spi_tegra_transfer * don't request_mem_region iomem as platform bus does that for us * __exit -> __devexit v3 changes: from Russell King: * put request_mem_region back int from Grant Likely: * remove #undef DEBUG * add SLINK_ to register bit defines * remove unused bytes_per_word * make spi_tegra_readl/writel static linine * various refactoring for clarity * mark err if BSY bit is not cleared after 1000 retries * move spinlock to protect setting of RDY bit * subsys_initcall -> module_init v3 changes: from Grant Likely: * update spi_tegra to use PTR_ERRless dma API v4 changes: from Grant Likely: * remove empty spi_tegra_cleanup fucntion * allow device ids of -1 Signed-off-by: Erik Gilling <konkers@android.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Cc: Thierry Reding <thierry.reding@avionic-design.de> Cc: Russell King <linux@arm.linux.org.uk> spi: tegra: cleanups from upstream review Change-Id: Icecf7e64efcb39de072a15234ba1faa4bad40d25 Signed-off-by: Erik Gilling <konkers@android.com>
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