spi: add OpenCores tiny SPI driver

This patch adds support of OpenCores tiny SPI driver.

http://opencores.org/project,tiny_spi

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

1 files changed, 20 insertions, 0 deletions

diff --git a/include/linux/spi/spi_oc_tiny.h b/include/linux/spi/spi_oc_tiny.h
new file mode 100644
index 000000000000..1ac529cf4f06
--- /dev/null
+++ b/include/linux/spi/spi_oc_tiny.h
@@ -0,0 +1,20 @@
+#ifndef _LINUX_SPI_SPI_OC_TINY_H
+#define _LINUX_SPI_SPI_OC_TINY_H
+
+/**
+ * struct tiny_spi_platform_data - platform data of the OpenCores tiny SPI
+ * @freq:       input clock freq to the core.
+ * @baudwidth:  baud rate divider width of the core.
+ * @gpio_cs_count:      number of gpio pins used for chipselect.
+ * @gpio_cs:    array of gpio pins used for chipselect.
+ *
+ * freq and baudwidth are used only if the divider is programmable.
+ */
+struct tiny_spi_platform_data {
+        unsigned int freq;
+        unsigned int baudwidth;
+        unsigned int gpio_cs_count;
+        int *gpio_cs;
+};
+
+#endif /* _LINUX_SPI_SPI_OC_TINY_H */