Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / spi / spi.c

diff --git a/qemu/roms/u-boot/drivers/spi/spi.c b/qemu/roms/u-boot/drivers/spi/spi.c
new file mode 100644 (file)
index 0000000..7ddea9b
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/spi/spi.c
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <fdtdec.h>
+#include <malloc.h>
+#include <spi.h>
+
+int spi_set_wordlen(struct spi_slave *slave, unsigned int wordlen)
+{
+       if (wordlen == 0 || wordlen > 32) {
+               printf("spi: invalid wordlen %d\n", wordlen);
+               return -1;
+       }
+
+       slave->wordlen = wordlen;
+
+       return 0;
+}
+
+void *spi_do_alloc_slave(int offset, int size, unsigned int bus,
+                        unsigned int cs)
+{
+       struct spi_slave *slave;
+       void *ptr;
+
+       ptr = malloc(size);
+       if (ptr) {
+               memset(ptr, '\0', size);
+               slave = (struct spi_slave *)(ptr + offset);
+               slave->bus = bus;
+               slave->cs = cs;
+               slave->wordlen = SPI_DEFAULT_WORDLEN;
+       }
+
+       return ptr;
+}
+
+#ifdef CONFIG_OF_SPI
+struct spi_slave *spi_base_setup_slave_fdt(const void *blob, int busnum,
+                                          int node)
+{
+       int cs, max_hz, mode = 0;
+
+       cs = fdtdec_get_int(blob, node, "reg", -1);
+       max_hz = fdtdec_get_int(blob, node, "spi-max-frequency", 100000);
+       if (fdtdec_get_bool(blob, node, "spi-cpol"))
+               mode |= SPI_CPOL;
+       if (fdtdec_get_bool(blob, node, "spi-cpha"))
+               mode |= SPI_CPHA;
+       if (fdtdec_get_bool(blob, node, "spi-cs-high"))
+               mode |= SPI_CS_HIGH;
+       return spi_setup_slave(busnum, cs, max_hz, mode);
+}
+#endif