1 files changed, 66 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/cxd2880/cxd2880_io.c b/drivers/media/dvb-frontends/cxd2880/cxd2880_io.c
new file mode 100644
index 000000000000..9d932bccfa6c
--- /dev/null
+++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_io.c
@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * cxd2880_io.c
+ * Sony CXD2880 DVB-T2/T tuner + demodulator driver
+ * register I/O interface functions
+ *
+ * Copyright (C) 2016, 2017, 2018 Sony Semiconductor Solutions Corporation
+ */
+
+#include "cxd2880_io.h"
+
+int cxd2880_io_common_write_one_reg(struct cxd2880_io *io,
+				    enum cxd2880_io_tgt tgt,
+				    u8 sub_address, u8 data)
+{
+	if (!io)
+		return -EINVAL;
+
+	return io->write_regs(io, tgt, sub_address, &data, 1);
+}
+
+int cxd2880_io_set_reg_bits(struct cxd2880_io *io,
+			    enum cxd2880_io_tgt tgt,
+			    u8 sub_address, u8 data, u8 mask)
+{
+	int ret;
+
+	if (!io)
+		return -EINVAL;
+
+	if (mask == 0x00)
+		return 0;
+
+	if (mask != 0xff) {
+		u8 rdata = 0x00;
+
+		ret = io->read_regs(io, tgt, sub_address, &rdata, 1);
+		if (ret)
+			return ret;
+
+		data = (data & mask) | (rdata & (mask ^ 0xff));
+	}
+
+	return io->write_reg(io, tgt, sub_address, data);
+}
+
+int cxd2880_io_write_multi_regs(struct cxd2880_io *io,
+			     enum cxd2880_io_tgt tgt,
+			     const struct cxd2880_reg_value reg_value[],
+			     u8 size)
+{
+	int ret;
+	int i;
+
+	if (!io)
+		return -EINVAL;
+
+	for (i = 0; i < size ; i++) {
+		ret = io->write_reg(io, tgt, reg_value[i].addr,
+				    reg_value[i].value);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}