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authorRamesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com>2017-06-13 15:54:47 +0300
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2017-06-20 13:02:43 +0300
commitb47b79d8a231d137ec9f9a5bef05f9e2f19a4347 (patch)
tree45daae32dc861131d7e1b931fc6aef9cc6e9705e /Documentation/media
parenta45509c080a13a2cd7f3a4f5ab8733f57dd8f1a3 (diff)
downloadlinux-b47b79d8a231d137ec9f9a5bef05f9e2f19a4347.tar.xz
[media] media: i2c: max2175: Add MAX2175 support
This patch adds driver support for the MAX2175 chip. This is Maxim Integrated's RF to Bits tuner front end chip designed for software-defined radio solutions. This driver exposes the tuner as a sub-device instance with standard and custom controls to configure the device. Signed-off-by: Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com> Signed-off-by: Hans Verkuil <hansverk@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'Documentation/media')
-rw-r--r--Documentation/media/v4l-drivers/index.rst1
-rw-r--r--Documentation/media/v4l-drivers/max2175.rst62
2 files changed, 63 insertions, 0 deletions
diff --git a/Documentation/media/v4l-drivers/index.rst b/Documentation/media/v4l-drivers/index.rst
index 90fe22a6414a..2e24d6806052 100644
--- a/Documentation/media/v4l-drivers/index.rst
+++ b/Documentation/media/v4l-drivers/index.rst
@@ -42,6 +42,7 @@ For more details see the file COPYING in the source distribution of Linux.
davinci-vpbe
fimc
ivtv
+ max2175
meye
omap3isp
omap4_camera
diff --git a/Documentation/media/v4l-drivers/max2175.rst b/Documentation/media/v4l-drivers/max2175.rst
new file mode 100644
index 000000000000..04478c25d57a
--- /dev/null
+++ b/Documentation/media/v4l-drivers/max2175.rst
@@ -0,0 +1,62 @@
+Maxim Integrated MAX2175 RF to bits tuner driver
+================================================
+
+The MAX2175 driver implements the following driver-specific controls:
+
+``V4L2_CID_MAX2175_I2S_ENABLE``
+-------------------------------
+ Enable/Disable I2S output of the tuner. This is a private control
+ that can be accessed only using the subdev interface.
+ Refer to Documentation/media/kapi/v4l2-controls for more details.
+
+.. flat-table::
+ :header-rows: 0
+ :stub-columns: 0
+ :widths: 1 4
+
+ * - ``(0)``
+ - I2S output is disabled.
+ * - ``(1)``
+ - I2S output is enabled.
+
+``V4L2_CID_MAX2175_HSLS``
+-------------------------
+ The high-side/low-side (HSLS) control of the tuner for a given band.
+
+.. flat-table::
+ :header-rows: 0
+ :stub-columns: 0
+ :widths: 1 4
+
+ * - ``(0)``
+ - The LO frequency position is below the desired frequency.
+ * - ``(1)``
+ - The LO frequency position is above the desired frequency.
+
+``V4L2_CID_MAX2175_RX_MODE (menu)``
+-----------------------------------
+ The Rx mode controls a number of preset parameters of the tuner like
+ sample clock (sck), sampling rate etc. These multiple settings are
+ provided under one single label called Rx mode in the datasheet. The
+ list below shows the supported modes with a brief description.
+
+.. flat-table::
+ :header-rows: 0
+ :stub-columns: 0
+ :widths: 1 4
+
+ * - ``"Europe modes"``
+ * - ``"FM 1.2" (0)``
+ - This configures FM band with a sample rate of 0.512 million
+ samples/sec with a 10.24 MHz sck.
+ * - ``"DAB 1.2" (1)``
+ - This configures VHF band with a sample rate of 2.048 million
+ samples/sec with a 32.768 MHz sck.
+
+ * - ``"North America modes"``
+ * - ``"FM 1.0" (0)``
+ - This configures FM band with a sample rate of 0.7441875 million
+ samples/sec with a 14.88375 MHz sck.
+ * - ``"DAB 1.2" (1)``
+ - This configures FM band with a sample rate of 0.372 million
+ samples/sec with a 7.441875 MHz sck.