Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / spi / ds1305.h

diff --git a/kernel/include/linux/spi/ds1305.h b/kernel/include/linux/spi/ds1305.h
new file mode 100644 (file)
index 0000000..287ec83
--- /dev/null
+++ b/kernel/include/linux/spi/ds1305.h
@@ -0,0 +1,35 @@
+#ifndef __LINUX_SPI_DS1305_H
+#define __LINUX_SPI_DS1305_H
+
+/*
+ * One-time configuration for ds1305 and ds1306 RTC chips.
+ *
+ * Put a pointer to this in spi_board_info.platform_data if you want to
+ * be sure that Linux (re)initializes this as needed ... after losing
+ * backup power, and potentially on the first boot.
+ */
+struct ds1305_platform_data {
+
+       /* Trickle charge configuration:  it's OK to leave out the MAGIC
+        * bitmask; mask in either DS1 or DS2, and then one of 2K/4k/8K.
+        */
+#define DS1305_TRICKLE_MAGIC   0xa0
+#define DS1305_TRICKLE_DS2     0x08    /* two diodes */
+#define DS1305_TRICKLE_DS1     0x04    /* one diode */
+#define DS1305_TRICKLE_2K      0x01    /* 2 KOhm resistance */
+#define DS1305_TRICKLE_4K      0x02    /* 4 KOhm resistance */
+#define DS1305_TRICKLE_8K      0x03    /* 8 KOhm resistance */
+       u8      trickle;
+
+       /* set only on ds1306 parts */
+       bool    is_ds1306;
+
+       /* ds1306 only:  enable 1 Hz output */
+       bool    en_1hz;
+
+       /* REVISIT:  the driver currently expects nINT0 to be wired
+        * as the alarm IRQ.  ALM1 may also need to be set up ...
+        */
+};
+
+#endif /* __LINUX_SPI_DS1305_H */