GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/drivers/spi/spi.c

@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ */
+
+#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 %u\n", wordlen);
+		return -1;
+	}
+
+	slave->wordlen = wordlen;
+
+	return 0;
+}
+
+void *spi_do_alloc_slave(int offset, int size, unsigned int bus,
+			 unsigned int cs)
+{
+	u8 *ptr;
+
+	ptr = malloc(size);
+	if (ptr) {
+		struct spi_slave *slave;
+
+		memset(ptr, '\0', size);
+		slave = (struct spi_slave *)(ptr + offset);
+		slave->bus = bus;
+		slave->cs = cs;
+		slave->wordlen = SPI_DEFAULT_WORDLEN;
+	}
+
+	return ptr;
+}