[PATCH V3 1/1] iio: Added Capella cm3232 ambient light sensor driver.

2015-01-15 Thread Kevin Tsai 
CM3232 is an advanced ambient light sensor with I2C protocol interface.
The I2C slave address is internally hardwired as 0x10 (7-bit).  Writing
to configure register is byte mode, but reading ALS register requests to
use word mode for 16-bit resolution.

Signed-off-by: Kevin Tsai kt...@capellamicro.com
---
v3:
Added hw_id to als_info structure.
Removed unused include files.
Modified cm3232_write_als_it() to handle register update fail.

Thanks comments from Daniel Baluta.

v2:
Removed unused CM3232_CMD_ALS_HS.
Modified cm3232_als_info structure.  Removed id field.
Modified cm3232_chip structure.
Merged CM3232_als_it_bits and CM3232_als_it_values to cm3232_it_scale.
Removed mutex lock.
Renamed als_raw to regs_als.  Moved it to cm3232_chip structure.
Modified cm3232_read_als_it() and cm3232_write_als_it() to support val2.

Thanks comments from Jeremiah Mahler, Peter Meerwald, Daniel Baluta,
and Joe Perches.

v1:
Added cm3232.c to support Capella Microsystems CM3232 Ambient Light
Sensor.

 .../devicetree/bindings/i2c/trivial-devices.txt|   1 +
 MAINTAINERS|   6 +
 drivers/iio/light/Kconfig  |  11 +
 drivers/iio/light/Makefile |   1 +
 drivers/iio/light/cm3232.c | 409 +
 5 files changed, 428 insertions(+)
 create mode 100644 drivers/iio/light/cm3232.c

diff --git a/Documentation/devicetree/bindings/i2c/trivial-devices.txt 
b/Documentation/devicetree/bindings/i2c/trivial-devices.txt
index 9f4e382..572a7c4 100644
--- a/Documentation/devicetree/bindings/i2c/trivial-devices.txt
+++ b/Documentation/devicetree/bindings/i2c/trivial-devices.txt
@@ -34,6 +34,7 @@ atmel,24c512  i2c serial eeprom  (24cxx)
 atmel,24c1024  i2c serial eeprom  (24cxx)
 atmel,at97sc3204t  i2c trusted platform module (TPM)
 capella,cm32181CM32181: Ambient Light Sensor
+capella,cm3232 CM3232: Ambient Light Sensor
 catalyst,24c32 i2c serial eeprom
 cirrus,cs42l51 Cirrus Logic CS42L51 audio codec
 dallas,ds1307  64 x 8, Serial, I2C Real-Time Clock
diff --git a/MAINTAINERS b/MAINTAINERS
index ddb9ac8..06a613a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2378,6 +2378,12 @@ F:   security/capability.c
 F: security/commoncap.c
 F: kernel/capability.c
 
+CAPELLA MICROSYSTEMS LIGHT SENSOR DRIVER
+M: Kevin Tsai kt...@capellamicro.com
+S: Maintained
+F: drivers/iio/light/cm*
+F: Documentation/devicetree/bindings/i2c/trivial-devices.txt
+
 CC2520 IEEE-802.15.4 RADIO DRIVER
 M: Varka Bhadram varkabhad...@gmail.com
 L: linux-w...@vger.kernel.org
diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
index 5bea821..cd5028e 100644
--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -48,6 +48,17 @@ config CM32181
 To compile this driver as a module, choose M here:
 the module will be called cm32181.
 
+config CM3232
+   depends on I2C
+   tristate CM3232 ambient light sensor
+   help
+Say Y here if you use cm3232.
+This option enables ambient light sensor using
+Capella Microsystems cm3232 device driver.
+
+To compile this driver as a module, choose M here:
+the module will be called cm3232.
+
 config CM36651
depends on I2C
tristate CM36651 driver
diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
index 47877a3..f2c8d55 100644
--- a/drivers/iio/light/Makefile
+++ b/drivers/iio/light/Makefile
@@ -7,6 +7,7 @@ obj-$(CONFIG_ADJD_S311) += adjd_s311.o
 obj-$(CONFIG_AL3320A)  += al3320a.o
 obj-$(CONFIG_APDS9300) += apds9300.o
 obj-$(CONFIG_CM32181)  += cm32181.o
+obj-$(CONFIG_CM3232)   += cm3232.o
 obj-$(CONFIG_CM36651)  += cm36651.o
 obj-$(CONFIG_GP2AP020A00F) += gp2ap020a00f.o
 obj-$(CONFIG_HID_SENSOR_ALS)   += hid-sensor-als.o
diff --git a/drivers/iio/light/cm3232.c b/drivers/iio/light/cm3232.c
new file mode 100644
index 000..8573f98
--- /dev/null
+++ b/drivers/iio/light/cm3232.c
@@ -0,0 +1,409 @@
+/*
+ * CM3232 Ambient Light Sensor
+ *
+ * Copyright (C) 2014-2015 Capella Microsystems Inc.
+ * Author: Kevin Tsai kt...@capellamicro.com
+ *
+ * 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 the Free Software Foundation.
+ *
+ * IIO driver for CM3232 (7-bit I2C slave address 0x10).
+ *
+ */
+
+#include linux/i2c.h
+#include linux/module.h
+#include linux/iio/iio.h
+#include linux/iio/sysfs.h
+#include linux/init.h
+
+/* Registers Address */
+#define CM3232_REG_ADDR_CMD0x00
+#define CM3232_REG_ADDR_ALS0x50
+#define CM3232_REG_ADDR_ID 0x53
+
+#define CM3232_CMD_ALS_DISABLE BIT(0)
+
+#define CM3232_CMD_ALS_IT_SHIFT2
+#define CM3232_CMD_ALS_IT_MASK (BIT(2) | BIT(3) | BIT(4

[PATCH V2 1/1] iio: Added Capella cm3232 ambient light sensor driver.

2015-01-06 Thread Kevin Tsai 
CM3232 is an advanced ambient light sensor with I2C protocol interface.
The I2C slave address is internally hardwired as 0x10 (7-bit).  Writing
to configure register is byte mode, but reading ALS register requests to
use word mode for 16-bit resolution.

v2:
Removed unused CM3232_CMD_ALS_HS.
Modified cm3232_als_info structure.  Removed id field.
Modified cm3232_chip structure.
Merged CM3232_als_it_bits and CM3232_als_it_values to cm3232_it_scale.
Removed mutex lock.
Renamed als_raw to regs_als.  Moved it to cm3232_chip structure.
Modified cm3232_read_als_it() and cm3232_write_als_it() to support val2.

Thanks comments from Jeremiah Mahler, Peter Meerwald, Daniel Baluta,
and Joe Perches.

v1:
Added cm3232.c to support Capella Microsystems CM3232 Ambient Light
Sensor.

Signed-off-by: Kevin Tsai kt...@capellamicro.com
---
 .../devicetree/bindings/i2c/trivial-devices.txt|   1 +
 MAINTAINERS|   6 +
 drivers/iio/light/Kconfig  |  11 +
 drivers/iio/light/Makefile |   1 +
 drivers/iio/light/cm3232.c | 411 +
 5 files changed, 430 insertions(+)
 create mode 100644 drivers/iio/light/cm3232.c

diff --git a/Documentation/devicetree/bindings/i2c/trivial-devices.txt 
b/Documentation/devicetree/bindings/i2c/trivial-devices.txt
index 9f4e382..572a7c4 100644
--- a/Documentation/devicetree/bindings/i2c/trivial-devices.txt
+++ b/Documentation/devicetree/bindings/i2c/trivial-devices.txt
@@ -34,6 +34,7 @@ atmel,24c512  i2c serial eeprom  (24cxx)
 atmel,24c1024  i2c serial eeprom  (24cxx)
 atmel,at97sc3204t  i2c trusted platform module (TPM)
 capella,cm32181CM32181: Ambient Light Sensor
+capella,cm3232 CM3232: Ambient Light Sensor
 catalyst,24c32 i2c serial eeprom
 cirrus,cs42l51 Cirrus Logic CS42L51 audio codec
 dallas,ds1307  64 x 8, Serial, I2C Real-Time Clock
diff --git a/MAINTAINERS b/MAINTAINERS
index ddb9ac8..06a613a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2378,6 +2378,12 @@ F:   security/capability.c
 F: security/commoncap.c
 F: kernel/capability.c
 
+CAPELLA MICROSYSTEMS LIGHT SENSOR DRIVER
+M: Kevin Tsai kt...@capellamicro.com
+S: Maintained
+F: drivers/iio/light/cm*
+F: Documentation/devicetree/bindings/i2c/trivial-devices.txt
+
 CC2520 IEEE-802.15.4 RADIO DRIVER
 M: Varka Bhadram varkabhad...@gmail.com
 L: linux-w...@vger.kernel.org
diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
index 5bea821..cd5028e 100644
--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -48,6 +48,17 @@ config CM32181
 To compile this driver as a module, choose M here:
 the module will be called cm32181.
 
+config CM3232
+   depends on I2C
+   tristate CM3232 ambient light sensor
+   help
+Say Y here if you use cm3232.
+This option enables ambient light sensor using
+Capella Microsystems cm3232 device driver.
+
+To compile this driver as a module, choose M here:
+the module will be called cm3232.
+
 config CM36651
depends on I2C
tristate CM36651 driver
diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
index 47877a3..f2c8d55 100644
--- a/drivers/iio/light/Makefile
+++ b/drivers/iio/light/Makefile
@@ -7,6 +7,7 @@ obj-$(CONFIG_ADJD_S311) += adjd_s311.o
 obj-$(CONFIG_AL3320A)  += al3320a.o
 obj-$(CONFIG_APDS9300) += apds9300.o
 obj-$(CONFIG_CM32181)  += cm32181.o
+obj-$(CONFIG_CM3232)   += cm3232.o
 obj-$(CONFIG_CM36651)  += cm36651.o
 obj-$(CONFIG_GP2AP020A00F) += gp2ap020a00f.o
 obj-$(CONFIG_HID_SENSOR_ALS)   += hid-sensor-als.o
diff --git a/drivers/iio/light/cm3232.c b/drivers/iio/light/cm3232.c
new file mode 100644
index 000..b4b7d1b
--- /dev/null
+++ b/drivers/iio/light/cm3232.c
@@ -0,0 +1,411 @@
+/*
+ * CM3232 Ambient Light Sensor
+ *
+ * Copyright (C) 2014-2015 Capella Microsystems Inc.
+ * Author: Kevin Tsai kt...@capellamicro.com
+ *
+ * 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 the Free Software Foundation.
+ *
+ * IIO driver for CM3232 (7-bit I2C slave address 0x10).
+ *
+ */
+
+#include linux/delay.h
+#include linux/err.h
+#include linux/i2c.h
+#include linux/module.h
+#include linux/interrupt.h
+#include linux/regulator/consumer.h
+#include linux/iio/iio.h
+#include linux/iio/sysfs.h
+#include linux/iio/events.h
+#include linux/init.h
+
+/* Registers Address */
+#define CM3232_REG_ADDR_CMD 0x00
+#define CM3232_REG_ADDR_ALS 0x50
+#define CM3232_REG_ADDR_ID 0x53
+
+/* CMD register */
+#define CM3232_CMD_ALS_DISABLE BIT(0)
+
+#define CM3232_CMD_ALS_IT_SHIFT 2
+#define CM3232_CMD_ALS_IT_MASK (0x07  CM3232_CMD_ALS_IT_SHIFT)
+#define CM3232_CMD_ALS_IT_DEFAULT (0x01  CM3232_CMD_ALS_IT_SHIFT

[PATCH V1 1/1] iio: Added Capella cm3232 ambient light sensor driver.

2014-12-31 Thread Kevin Tsai 
CM3232 is an advanced ambient light sensor with I2C protocol interface.
The I2C slave address is internally hardwired as 0x10 (7-bit).  Writing
to configure register is byte mode, but reading ALS register requests to
use word mode for 16-bit resolution.

Signed-off-by: Kevin Tsai kt...@capellamicro.com
---
 .../devicetree/bindings/i2c/trivial-devices.txt|   1 +
 MAINTAINERS|   6 +
 drivers/iio/light/Kconfig  |  11 +
 drivers/iio/light/Makefile |   1 +
 drivers/iio/light/cm3232.c | 403 +
 5 files changed, 422 insertions(+)
 create mode 100644 drivers/iio/light/cm3232.c

diff --git a/Documentation/devicetree/bindings/i2c/trivial-devices.txt 
b/Documentation/devicetree/bindings/i2c/trivial-devices.txt
index 9f4e382..572a7c4 100644
--- a/Documentation/devicetree/bindings/i2c/trivial-devices.txt
+++ b/Documentation/devicetree/bindings/i2c/trivial-devices.txt
@@ -34,6 +34,7 @@ atmel,24c512  i2c serial eeprom  (24cxx)
 atmel,24c1024  i2c serial eeprom  (24cxx)
 atmel,at97sc3204t  i2c trusted platform module (TPM)
 capella,cm32181CM32181: Ambient Light Sensor
+capella,cm3232 CM3232: Ambient Light Sensor
 catalyst,24c32 i2c serial eeprom
 cirrus,cs42l51 Cirrus Logic CS42L51 audio codec
 dallas,ds1307  64 x 8, Serial, I2C Real-Time Clock
diff --git a/MAINTAINERS b/MAINTAINERS
index ddb9ac8..06a613a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2378,6 +2378,12 @@ F:   security/capability.c
 F: security/commoncap.c
 F: kernel/capability.c
 
+CAPELLA MICROSYSTEMS LIGHT SENSOR DRIVER
+M: Kevin Tsai kt...@capellamicro.com
+S: Maintained
+F: drivers/iio/light/cm*
+F: Documentation/devicetree/bindings/i2c/trivial-devices.txt
+
 CC2520 IEEE-802.15.4 RADIO DRIVER
 M: Varka Bhadram varkabhad...@gmail.com
 L: linux-w...@vger.kernel.org
diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
index 5bea821..d2318e2 100644
--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -48,6 +48,17 @@ config CM32181
 To compile this driver as a module, choose M here:
 the module will be called cm32181.
 
+config CM3232
+   depends on I2C
+   tristate CM3232 driver
+   help
+Say Y here if you use cm3232.
+This option enables ambient light sensor using
+Capella Microsystems cm3232 device driver.
+
+To compile this driver as a module, choose M here:
+the module will be called cm3232.
+
 config CM36651
depends on I2C
tristate CM36651 driver
diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
index 47877a3..f2c8d55 100644
--- a/drivers/iio/light/Makefile
+++ b/drivers/iio/light/Makefile
@@ -7,6 +7,7 @@ obj-$(CONFIG_ADJD_S311) += adjd_s311.o
 obj-$(CONFIG_AL3320A)  += al3320a.o
 obj-$(CONFIG_APDS9300) += apds9300.o
 obj-$(CONFIG_CM32181)  += cm32181.o
+obj-$(CONFIG_CM3232)   += cm3232.o
 obj-$(CONFIG_CM36651)  += cm36651.o
 obj-$(CONFIG_GP2AP020A00F) += gp2ap020a00f.o
 obj-$(CONFIG_HID_SENSOR_ALS)   += hid-sensor-als.o
diff --git a/drivers/iio/light/cm3232.c b/drivers/iio/light/cm3232.c
new file mode 100644
index 000..fd98eeb
--- /dev/null
+++ b/drivers/iio/light/cm3232.c
@@ -0,0 +1,403 @@
+/*
+ * Copyright (C) 2014 Capella Microsystems Inc.
+ * Author: Kevin Tsai kt...@capellamicro.com
+ *
+ * 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 the Free Software Foundation.
+ *
+ */
+
+#include linux/delay.h
+#include linux/err.h
+#include linux/i2c.h
+#include linux/mutex.h
+#include linux/module.h
+#include linux/interrupt.h
+#include linux/regulator/consumer.h
+#include linux/iio/iio.h
+#include linux/iio/sysfs.h
+#include linux/iio/events.h
+#include linux/init.h
+
+/* Registers Address */
+#define CM3232_REG_ADDR_CMD0x00
+#define CM3232_REG_ADDR_ALS0x50
+#define CM3232_REG_ADDR_ID 0x53
+
+/* CMD register */
+#define CM3232_CMD_ALS_DISABLE BIT(0)
+#defineCM3232_CMD_ALS_HS   BIT(1)
+
+#define CM3232_CMD_ALS_IT_SHIFT 2
+#define CM3232_CMD_ALS_IT_MASK  (0x07  CM3232_CMD_ALS_IT_SHIFT)
+#define CM3232_CMD_ALS_IT_DEFAULT   (0x01  CM3232_CMD_ALS_IT_SHIFT)
+
+#defineCM3232_CMD_ALS_RESETBIT(6)
+
+#define CM3232_CMD_DEFAULT CM3232_CMD_ALS_IT_DEFAULT
+
+#define CM3232_CALIBSCALE_DEFAULT  10
+#define CM3232_CALIBSCALE_RESOLUTION   10
+#define CM3232_MLUX_PER_LUX1000
+
+#define CM3232_MLUX_PER_BIT_DEFAULT64
+#define CM3232_MLUX_PER_BIT_BASE_IT10
+static const int CM3232_als_it_bits[] = { 0, 1, 2, 3, 4, 5};
+static const int CM3232_als_it_values[] = {
+   10