iio: potentiometer: mcp4531: Add support for MCP454x, MCP456x, MCP464x and MCP466x

This patch adds support for MCP454x, MCP456x, MCP464x and MCP466x parts.
The main difference with currently supported parts (MCP453x and alike) is
the addition of a non-volatile memory in order to recall the wiper setting
at power-on. This feature is currently not supported and only the
volatile memory is used to set the wiper.

Signed-off-by: Florian Vaussard <florian.vaussard@heig-vd.ch>
Acked-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/drivers/iio/potentiometer/Kconfig b/drivers/iio/potentiometer/Kconfig
index 0941c8d490a0a19efe909497802bf82fad03f029..55c24148db171316fa8f8a7d2f0a42b99a2ca3f6 100644 (file)
--- a/drivers/iio/potentiometer/Kconfig
+++ b/drivers/iio/potentiometer/Kconfig
@@ -49,8 +49,10 @@ config MCP4531
        depends on I2C
        help
          Say yes here to build support for the Microchip
-         MCP4531, MCP4532, MCP4551, MCP4552,
-         MCP4631, MCP4632, MCP4651, MCP4652
+         MCP4531, MCP4532, MCP4541, MCP4542,
+         MCP4551, MCP4552, MCP4561, MCP4562,
+         MCP4631, MCP4632, MCP4641, MCP4642,
+         MCP4651, MCP4652, MCP4661, MCP4662
          digital potentiomenter chips.
 
          To compile this driver as a module, choose M here: the

diff --git a/drivers/iio/potentiometer/mcp4531.c b/drivers/iio/potentiometer/mcp4531.c
index 3b72e1a595db8634d6b94baf36aebcb29ec37ef6..2251173153c113481f3c94a6f0e2c40f3d9af134 100644 (file)
--- a/drivers/iio/potentiometer/mcp4531.c
+++ b/drivers/iio/potentiometer/mcp4531.c
@@ -8,12 +8,20 @@
  * DEVID       #Wipers #Positions      Resistor Opts (kOhm)    i2c address
  * mcp4531     1       129             5, 10, 50, 100          010111x
  * mcp4532     1       129             5, 10, 50, 100          01011xx
+ * mcp4541     1       129             5, 10, 50, 100          010111x
+ * mcp4542     1       129             5, 10, 50, 100          01011xx
  * mcp4551     1       257             5, 10, 50, 100          010111x
  * mcp4552     1       257             5, 10, 50, 100          01011xx
+ * mcp4561     1       257             5, 10, 50, 100          010111x
+ * mcp4562     1       257             5, 10, 50, 100          01011xx
  * mcp4631     2       129             5, 10, 50, 100          0101xxx
  * mcp4632     2       129             5, 10, 50, 100          01011xx
+ * mcp4641     2       129             5, 10, 50, 100          0101xxx
+ * mcp4642     2       129             5, 10, 50, 100          01011xx
  * mcp4651     2       257             5, 10, 50, 100          0101xxx
  * mcp4652     2       257             5, 10, 50, 100          01011xx
+ * mcp4661     2       257             5, 10, 50, 100          0101xxx
+ * mcp4662     2       257             5, 10, 50, 100          01011xx
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 as published by
@@ -37,18 +45,34 @@ enum mcp4531_type {
        MCP453x_103,
        MCP453x_503,
        MCP453x_104,
+       MCP454x_502,
+       MCP454x_103,
+       MCP454x_503,
+       MCP454x_104,
        MCP455x_502,
        MCP455x_103,
        MCP455x_503,
        MCP455x_104,
+       MCP456x_502,
+       MCP456x_103,
+       MCP456x_503,
+       MCP456x_104,
        MCP463x_502,
        MCP463x_103,
        MCP463x_503,
        MCP463x_104,
+       MCP464x_502,
+       MCP464x_103,
+       MCP464x_503,
+       MCP464x_104,
        MCP465x_502,
        MCP465x_103,
        MCP465x_503,
        MCP465x_104,
+       MCP466x_502,
+       MCP466x_103,
+       MCP466x_503,
+       MCP466x_104,
 };
 
 static const struct mcp4531_cfg mcp4531_cfg[] = {
@@ -56,18 +80,34 @@ static const struct mcp4531_cfg mcp4531_cfg[] = {
        [MCP453x_103] = { .wipers = 1, .max_pos = 128, .kohms =  10, },
        [MCP453x_503] = { .wipers = 1, .max_pos = 128, .kohms =  50, },
        [MCP453x_104] = { .wipers = 1, .max_pos = 128, .kohms = 100, },
+       [MCP454x_502] = { .wipers = 1, .max_pos = 128, .kohms =   5, },
+       [MCP454x_103] = { .wipers = 1, .max_pos = 128, .kohms =  10, },
+       [MCP454x_503] = { .wipers = 1, .max_pos = 128, .kohms =  50, },
+       [MCP454x_104] = { .wipers = 1, .max_pos = 128, .kohms = 100, },
        [MCP455x_502] = { .wipers = 1, .max_pos = 256, .kohms =   5, },
        [MCP455x_103] = { .wipers = 1, .max_pos = 256, .kohms =  10, },
        [MCP455x_503] = { .wipers = 1, .max_pos = 256, .kohms =  50, },
        [MCP455x_104] = { .wipers = 1, .max_pos = 256, .kohms = 100, },
+       [MCP456x_502] = { .wipers = 1, .max_pos = 256, .kohms =   5, },
+       [MCP456x_103] = { .wipers = 1, .max_pos = 256, .kohms =  10, },
+       [MCP456x_503] = { .wipers = 1, .max_pos = 256, .kohms =  50, },
+       [MCP456x_104] = { .wipers = 1, .max_pos = 256, .kohms = 100, },
        [MCP463x_502] = { .wipers = 2, .max_pos = 128, .kohms =   5, },
        [MCP463x_103] = { .wipers = 2, .max_pos = 128, .kohms =  10, },
        [MCP463x_503] = { .wipers = 2, .max_pos = 128, .kohms =  50, },
        [MCP463x_104] = { .wipers = 2, .max_pos = 128, .kohms = 100, },
+       [MCP464x_502] = { .wipers = 2, .max_pos = 128, .kohms =   5, },
+       [MCP464x_103] = { .wipers = 2, .max_pos = 128, .kohms =  10, },
+       [MCP464x_503] = { .wipers = 2, .max_pos = 128, .kohms =  50, },
+       [MCP464x_104] = { .wipers = 2, .max_pos = 128, .kohms = 100, },
        [MCP465x_502] = { .wipers = 2, .max_pos = 256, .kohms =   5, },
        [MCP465x_103] = { .wipers = 2, .max_pos = 256, .kohms =  10, },
        [MCP465x_503] = { .wipers = 2, .max_pos = 256, .kohms =  50, },
        [MCP465x_104] = { .wipers = 2, .max_pos = 256, .kohms = 100, },
+       [MCP466x_502] = { .wipers = 2, .max_pos = 256, .kohms =   5, },
+       [MCP466x_103] = { .wipers = 2, .max_pos = 256, .kohms =  10, },
+       [MCP466x_503] = { .wipers = 2, .max_pos = 256, .kohms =  50, },
+       [MCP466x_104] = { .wipers = 2, .max_pos = 256, .kohms = 100, },
 };
 
 #define MCP4531_WRITE (0 << 2)
@@ -187,6 +227,14 @@ static const struct i2c_device_id mcp4531_id[] = {
        { "mcp4532-103", MCP453x_103 },
        { "mcp4532-503", MCP453x_503 },
        { "mcp4532-104", MCP453x_104 },
+       { "mcp4541-502", MCP454x_502 },
+       { "mcp4541-103", MCP454x_103 },
+       { "mcp4541-503", MCP454x_503 },
+       { "mcp4541-104", MCP454x_104 },
+       { "mcp4542-502", MCP454x_502 },
+       { "mcp4542-103", MCP454x_103 },
+       { "mcp4542-503", MCP454x_503 },
+       { "mcp4542-104", MCP454x_104 },
        { "mcp4551-502", MCP455x_502 },
        { "mcp4551-103", MCP455x_103 },
        { "mcp4551-503", MCP455x_503 },
@@ -195,6 +243,14 @@ static const struct i2c_device_id mcp4531_id[] = {
        { "mcp4552-103", MCP455x_103 },
        { "mcp4552-503", MCP455x_503 },
        { "mcp4552-104", MCP455x_104 },
+       { "mcp4561-502", MCP456x_502 },
+       { "mcp4561-103", MCP456x_103 },
+       { "mcp4561-503", MCP456x_503 },
+       { "mcp4561-104", MCP456x_104 },
+       { "mcp4562-502", MCP456x_502 },
+       { "mcp4562-103", MCP456x_103 },
+       { "mcp4562-503", MCP456x_503 },
+       { "mcp4562-104", MCP456x_104 },
        { "mcp4631-502", MCP463x_502 },
        { "mcp4631-103", MCP463x_103 },
        { "mcp4631-503", MCP463x_503 },
@@ -203,6 +259,14 @@ static const struct i2c_device_id mcp4531_id[] = {
        { "mcp4632-103", MCP463x_103 },
        { "mcp4632-503", MCP463x_503 },
        { "mcp4632-104", MCP463x_104 },
+       { "mcp4641-502", MCP464x_502 },
+       { "mcp4641-103", MCP464x_103 },
+       { "mcp4641-503", MCP464x_503 },
+       { "mcp4641-104", MCP464x_104 },
+       { "mcp4642-502", MCP464x_502 },
+       { "mcp4642-103", MCP464x_103 },
+       { "mcp4642-503", MCP464x_503 },
+       { "mcp4642-104", MCP464x_104 },
        { "mcp4651-502", MCP465x_502 },
        { "mcp4651-103", MCP465x_103 },
        { "mcp4651-503", MCP465x_503 },
@@ -211,6 +275,14 @@ static const struct i2c_device_id mcp4531_id[] = {
        { "mcp4652-103", MCP465x_103 },
        { "mcp4652-503", MCP465x_503 },
        { "mcp4652-104", MCP465x_104 },
+       { "mcp4661-502", MCP466x_502 },
+       { "mcp4661-103", MCP466x_103 },
+       { "mcp4661-503", MCP466x_503 },
+       { "mcp4661-104", MCP466x_104 },
+       { "mcp4662-502", MCP466x_502 },
+       { "mcp4662-103", MCP466x_103 },
+       { "mcp4662-503", MCP466x_503 },
+       { "mcp4662-104", MCP466x_104 },
        {}
 };
 MODULE_DEVICE_TABLE(i2c, mcp4531_id);