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hwmon: (mcp3021) Add MCP3221 support

Browse source 
This Patch adds support for mcp3221 chip to the
mcp3021 driver.

Signed-off-by: Sven Schuchmann <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
This commit is contained in:
Sven Schuchmann 2012-09-21 13:04:22 +02:00 • committed by Guenter Roeck
commit 592758b12f
3 changed files with 37 additions and 14 deletions
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7
drivers/hwmon/Kconfig
View file

@ -855,11 +855,12 @@ config SENSORS_MAX6650
will be called max6650.
config SENSORS_MCP3021
tristate "Microchip MCP3021"
tristate "Microchip MCP3021 and compatibles"
depends on I2C
help
If you say yes here you get support for the MCP3021 chip
that is a A/D converter (ADC) with 10-bit resolution.
If you say yes here you get support for MCP3021 and MCP3221.
The MCP3021 is a A/D converter (ADC) with 10-bit and the MCP3221
with 12-bit resolution.
This driver can also be built as a module. If so, the module
will be called mcp3021.

21
drivers/hwmon/mcp3021.c
View file

@ -1,5 +1,5 @@
/*
* mcp3021.c - driver for the Microchip MCP3021 chip
* mcp3021.c - driver for Microchip MCP3021 and MCP3221
*
* Copyright (C) 2008-2009, 2012 Freescale Semiconductor, Inc.
* Author: Mingkai Hu <Mingkai.hu@freescale.com>
@ -35,9 +35,16 @@
#define MCP3021_OUTPUT_RES 10 /* 10-bit resolution */
#define MCP3021_OUTPUT_SCALE 4
#define MCP3221_SAR_SHIFT 0
#define MCP3221_SAR_MASK 0xfff
#define MCP3221_OUTPUT_RES 12 /* 12-bit resolution */
#define MCP3221_OUTPUT_SCALE 1
enum chips {
mcp3021
mcp3021,
mcp3221
};
/*
* Client data (each client gets its own)
*/
@ -127,6 +134,13 @@ static int mcp3021_probe(struct i2c_client *client,
data->output_res = MCP3021_OUTPUT_RES;
data->output_scale = MCP3021_OUTPUT_SCALE;
break;
case mcp3221:
data->sar_shift = MCP3221_SAR_SHIFT;
data->sar_mask = MCP3221_SAR_MASK;
data->output_res = MCP3221_OUTPUT_RES;
data->output_scale = MCP3221_OUTPUT_SCALE;
break;
}
if (client->dev.platform_data) {
@ -165,6 +179,7 @@ static int mcp3021_remove(struct i2c_client *client)
static const struct i2c_device_id mcp3021_id[] = {
{ "mcp3021", mcp3021 },
{ "mcp3221", mcp3221 },
{ }
};
MODULE_DEVICE_TABLE(i2c, mcp3021_id);
@ -181,5 +196,5 @@ static struct i2c_driver mcp3021_driver = {
module_i2c_driver(mcp3021_driver);
MODULE_AUTHOR("Mingkai Hu <[email protected]>");
MODULE_DESCRIPTION("Microchip MCP3021 driver");
MODULE_DESCRIPTION("Microchip MCP3021/MCP3221 driver");
MODULE_LICENSE("GPL");