diff options
| author | Andrew Worsley <amworsley@gmail.com> | 2017-08-27 21:34:22 +1000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-08-28 17:23:29 +0200 |
| commit | 54865314f5a1bfade1555ca6b26653729a0f3e23 (patch) | |
| tree | fed7ba3ff73cae80aad622d7131a3cc73966dbd4 | |
| parent | e5cf84e8224c49f335aec6b69b3e373bbbe4641a (diff) | |
| download | linux-54865314f5a1bfade1555ca6b26653729a0f3e23.tar.bz2 | |
drivers: w1: Extend 1W master driver DS2482 with module option to support PPM/SPU/1WS features
Extend the one wire DS2482 master driver with a module option that allows support
for PPM/SPU/1WS interface modes to be requested. This allows support of chips
that require one or more of these features such as the DS28E05.
Signed-off-by: Andrew Worsley <amworsley@gmail.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/w1/masters/ds2482.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/w1/masters/ds2482.c b/drivers/w1/masters/ds2482.c index d49681cd29af..5b3e017d9276 100644 --- a/drivers/w1/masters/ds2482.c +++ b/drivers/w1/masters/ds2482.c @@ -70,6 +70,8 @@ MODULE_PARM_DESC(active_pullup, "Active pullup (apply to all buses): " \ #define DS2482_REG_CFG_PPM 0x02 /* presence pulse masking */ #define DS2482_REG_CFG_APU 0x01 /* active pull-up */ +/* extra configurations - e.g. 1WS */ +int extra_config; /** * Write and verify codes for the CHANNEL_SELECT command (DS2482-800 only). @@ -403,7 +405,7 @@ static u8 ds2482_w1_reset_bus(void *data) /* If the chip did reset since detect, re-config it */ if (err & DS2482_REG_STS_RST) ds2482_send_cmd_data(pdev, DS2482_CMD_WRITE_CONFIG, - ds2482_calculate_config(0x00)); + ds2482_calculate_config(extra_config)); } mutex_unlock(&pdev->access_lock); @@ -429,8 +431,7 @@ static u8 ds2482_w1_set_pullup(void *data, int delay) ds2482_wait_1wire_idle(pdev); /* note: it seems like both SPU and APU have to be set! */ retval = ds2482_send_cmd_data(pdev, DS2482_CMD_WRITE_CONFIG, - ds2482_calculate_config(DS2482_REG_CFG_SPU | - DS2482_REG_CFG_APU)); + ds2482_calculate_config(extra_config|DS2482_REG_CFG_SPU|DS2482_REG_CFG_APU)); ds2482_wait_1wire_idle(pdev); } @@ -483,7 +484,7 @@ static int ds2482_probe(struct i2c_client *client, /* Set all config items to 0 (off) */ ds2482_send_cmd_data(data, DS2482_CMD_WRITE_CONFIG, - ds2482_calculate_config(0x00)); + ds2482_calculate_config(extra_config)); mutex_init(&data->access_lock); @@ -558,4 +559,7 @@ module_i2c_driver(ds2482_driver); MODULE_AUTHOR("Ben Gardner <bgardner@wabtec.com>"); MODULE_DESCRIPTION("DS2482 driver"); +module_param(extra_config, int, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(extra_config, "Extra Configuration settings 1=APU,2=PPM,3=SPU,8=1WS"); + MODULE_LICENSE("GPL"); |