drivers/misc/lis3lv02d: add generic DT matching code
Adds logic to parse lis3 properties from a device tree node and store them in a freshly allocated lis3lv02d_platform_data. Note that the actual match tables are left out here. This part should happen in the drivers that bind to the individual busses (SPI/I2C/PCI). Also adds some DT bindinds documentation. Signed-off-by: Daniel Mack <zonque@gmail.com> Cc: Rob Herring <robherring2@gmail.com> Cc: "AnilKumar, Chimata" <anilkumar@ti.com> Reviewed-by: Éric Piel <eric.piel@tremplin-utc.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Daniel Mack
Greg Kroah-Hartman
parent
e2b2ed8365
commit
cbac1a8b89
|
|
@ -0,0 +1,76 @@
|
|||
LIS302 accelerometer devicetree bindings
|
||||
|
||||
This device is matched via its bus drivers, and has a number of properties
|
||||
that apply in on the generic device (independent from the bus).
|
||||
|
||||
|
||||
Required properties for the SPI bindings:
|
||||
- compatible: should be set to "st,lis3lv02d_spi"
|
||||
- reg: the chipselect index
|
||||
- spi-max-frequency: maximal bus speed, should be set to 1000000 unless
|
||||
constrained by external circuitry
|
||||
- interrupts: the interrupt generated by the device
|
||||
|
||||
|
||||
Optional properties for all bus drivers:
|
||||
|
||||
- st,click-single-{x,y,z}: if present, tells the device to issue an
|
||||
interrupt on single click events on the
|
||||
x/y/z axis.
|
||||
- st,click-double-{x,y,z}: if present, tells the device to issue an
|
||||
interrupt on double click events on the
|
||||
x/y/z axis.
|
||||
- st,click-thresh-{x,y,z}: set the x/y/z axis threshold
|
||||
- st,click-click-time-limit: click time limit, from 0 to 127.5msec
|
||||
with step of 0.5 msec
|
||||
- st,click-latency: click latency, from 0 to 255 msec with
|
||||
step of 1 msec.
|
||||
- st,click-window: click window, from 0 to 255 msec with
|
||||
step of 1 msec.
|
||||
- st,irq{1,2}-disable: disable IRQ 1/2
|
||||
- st,irq{1,2}-ff-wu-1: raise IRQ 1/2 on FF_WU_1 condition
|
||||
- st,irq{1,2}-ff-wu-2: raise IRQ 1/2 on FF_WU_2 condition
|
||||
- st,irq{1,2}-data-ready: raise IRQ 1/2 on data ready contition
|
||||
- st,irq{1,2}-click: raise IRQ 1/2 on click condition
|
||||
- st,irq-open-drain: consider IRQ lines open-drain
|
||||
- st,irq-active-low: make IRQ lines active low
|
||||
- st,wu-duration-1: duration register for Free-Fall/Wake-Up
|
||||
interrupt 1
|
||||
- st,wu-duration-2: duration register for Free-Fall/Wake-Up
|
||||
interrupt 2
|
||||
- st,wakeup-{x,y,z}-{lo,hi}: set wakeup condition on x/y/z axis for
|
||||
upper/lower limit
|
||||
- st,highpass-cutoff-hz=: 1, 2, 4 or 8 for 1Hz, 2Hz, 4Hz or 8Hz of
|
||||
highpass cut-off frequency
|
||||
- st,hipass{1,2}-disable: disable highpass 1/2.
|
||||
- st,default-rate=: set the default rate
|
||||
- st,axis-{x,y,z}=: set the axis to map to the three coordinates
|
||||
- st,{min,max}-limit-{x,y,z} set the min/max limits for x/y/z axis
|
||||
(used by self-test)
|
||||
|
||||
|
||||
Example for a SPI device node:
|
||||
|
||||
lis302@0 {
|
||||
compatible = "st,lis302dl-spi";
|
||||
reg = <0>;
|
||||
spi-max-frequency = <1000000>;
|
||||
interrupt-parent = <&gpio>;
|
||||
interrupts = <104 0>;
|
||||
|
||||
st,click-single-x;
|
||||
st,click-single-y;
|
||||
st,click-single-z;
|
||||
st,click-thresh-x = <10>;
|
||||
st,click-thresh-y = <10>;
|
||||
st,click-thresh-z = <10>;
|
||||
st,irq1-click;
|
||||
st,irq2-click;
|
||||
st,wakeup-x-lo;
|
||||
st,wakeup-x-hi;
|
||||
st,wakeup-y-lo;
|
||||
st,wakeup-y-hi;
|
||||
st,wakeup-z-lo;
|
||||
st,wakeup-z-hi;
|
||||
};
|
||||
|
||||
|
|
@ -39,6 +39,7 @@
|
|||
#include <linux/miscdevice.h>
|
||||
#include <linux/pm_runtime.h>
|
||||
#include <linux/atomic.h>
|
||||
#include <linux/of_device.h>
|
||||
#include "lis3lv02d.h"
|
||||
|
||||
#define DRIVER_NAME "lis3lv02d"
|
||||
|
|
@ -943,6 +944,154 @@ static void lis3lv02d_8b_configure(struct lis3lv02d *lis3,
|
|||
}
|
||||
}
|
||||
|
||||
#ifdef CONFIG_OF
|
||||
static int lis3lv02d_init_dt(struct lis3lv02d *lis3)
|
||||
{
|
||||
struct lis3lv02d_platform_data *pdata;
|
||||
struct device_node *np = lis3->of_node;
|
||||
u32 val;
|
||||
|
||||
if (!lis3->of_node)
|
||||
return 0;
|
||||
|
||||
pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
|
||||
if (!pdata)
|
||||
return -ENOMEM;
|
||||
|
||||
if (of_get_property(np, "st,click-single-x", NULL))
|
||||
pdata->click_flags |= LIS3_CLICK_SINGLE_X;
|
||||
if (of_get_property(np, "st,click-double-x", NULL))
|
||||
pdata->click_flags |= LIS3_CLICK_DOUBLE_X;
|
||||
|
||||
if (of_get_property(np, "st,click-single-y", NULL))
|
||||
pdata->click_flags |= LIS3_CLICK_SINGLE_Y;
|
||||
if (of_get_property(np, "st,click-double-y", NULL))
|
||||
pdata->click_flags |= LIS3_CLICK_DOUBLE_Y;
|
||||
|
||||
if (of_get_property(np, "st,click-single-z", NULL))
|
||||
pdata->click_flags |= LIS3_CLICK_SINGLE_Z;
|
||||
if (of_get_property(np, "st,click-double-z", NULL))
|
||||
pdata->click_flags |= LIS3_CLICK_DOUBLE_Z;
|
||||
|
||||
if (!of_property_read_u32(np, "st,click-threshold-x", &val))
|
||||
pdata->click_thresh_x = val;
|
||||
if (!of_property_read_u32(np, "st,click-threshold-y", &val))
|
||||
pdata->click_thresh_y = val;
|
||||
if (!of_property_read_u32(np, "st,click-threshold-z", &val))
|
||||
pdata->click_thresh_z = val;
|
||||
|
||||
if (!of_property_read_u32(np, "st,click-time-limit", &val))
|
||||
pdata->click_time_limit = val;
|
||||
if (!of_property_read_u32(np, "st,click-latency", &val))
|
||||
pdata->click_latency = val;
|
||||
if (!of_property_read_u32(np, "st,click-window", &val))
|
||||
pdata->click_window = val;
|
||||
|
||||
if (of_get_property(np, "st,irq1-disable", NULL))
|
||||
pdata->irq_cfg |= LIS3_IRQ1_DISABLE;
|
||||
if (of_get_property(np, "st,irq1-ff-wu-1", NULL))
|
||||
pdata->irq_cfg |= LIS3_IRQ1_FF_WU_1;
|
||||
if (of_get_property(np, "st,irq1-ff-wu-2", NULL))
|
||||
pdata->irq_cfg |= LIS3_IRQ1_FF_WU_2;
|
||||
if (of_get_property(np, "st,irq1-data-ready", NULL))
|
||||
pdata->irq_cfg |= LIS3_IRQ1_DATA_READY;
|
||||
if (of_get_property(np, "st,irq1-click", NULL))
|
||||
pdata->irq_cfg |= LIS3_IRQ1_CLICK;
|
||||
|
||||
if (of_get_property(np, "st,irq2-disable", NULL))
|
||||
pdata->irq_cfg |= LIS3_IRQ2_DISABLE;
|
||||
if (of_get_property(np, "st,irq2-ff-wu-1", NULL))
|
||||
pdata->irq_cfg |= LIS3_IRQ2_FF_WU_1;
|
||||
if (of_get_property(np, "st,irq2-ff-wu-2", NULL))
|
||||
pdata->irq_cfg |= LIS3_IRQ2_FF_WU_2;
|
||||
if (of_get_property(np, "st,irq2-data-ready", NULL))
|
||||
pdata->irq_cfg |= LIS3_IRQ2_DATA_READY;
|
||||
if (of_get_property(np, "st,irq2-click", NULL))
|
||||
pdata->irq_cfg |= LIS3_IRQ2_CLICK;
|
||||
|
||||
if (of_get_property(np, "st,irq-open-drain", NULL))
|
||||
pdata->irq_cfg |= LIS3_IRQ_OPEN_DRAIN;
|
||||
if (of_get_property(np, "st,irq-active-low", NULL))
|
||||
pdata->irq_cfg |= LIS3_IRQ_ACTIVE_LOW;
|
||||
|
||||
if (!of_property_read_u32(np, "st,wu-duration-1", &val))
|
||||
pdata->duration1 = val;
|
||||
if (!of_property_read_u32(np, "st,wu-duration-2", &val))
|
||||
pdata->duration2 = val;
|
||||
|
||||
if (of_get_property(np, "st,wakeup-x-lo", NULL))
|
||||
pdata->wakeup_flags |= LIS3_WAKEUP_X_LO;
|
||||
if (of_get_property(np, "st,wakeup-x-hi", NULL))
|
||||
pdata->wakeup_flags |= LIS3_WAKEUP_X_HI;
|
||||
if (of_get_property(np, "st,wakeup-y-lo", NULL))
|
||||
pdata->wakeup_flags |= LIS3_WAKEUP_Y_LO;
|
||||
if (of_get_property(np, "st,wakeup-y-hi", NULL))
|
||||
pdata->wakeup_flags |= LIS3_WAKEUP_Y_HI;
|
||||
if (of_get_property(np, "st,wakeup-z-lo", NULL))
|
||||
pdata->wakeup_flags |= LIS3_WAKEUP_Z_LO;
|
||||
if (of_get_property(np, "st,wakeup-z-hi", NULL))
|
||||
pdata->wakeup_flags |= LIS3_WAKEUP_Z_HI;
|
||||
|
||||
if (!of_property_read_u32(np, "st,highpass-cutoff-hz", &val)) {
|
||||
switch (val) {
|
||||
case 1:
|
||||
pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_1HZ;
|
||||
break;
|
||||
case 2:
|
||||
pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_2HZ;
|
||||
break;
|
||||
case 4:
|
||||
pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_4HZ;
|
||||
break;
|
||||
case 8:
|
||||
pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_8HZ;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (of_get_property(np, "st,hipass1-disable", NULL))
|
||||
pdata->hipass_ctrl |= LIS3_HIPASS1_DISABLE;
|
||||
if (of_get_property(np, "st,hipass2-disable", NULL))
|
||||
pdata->hipass_ctrl |= LIS3_HIPASS2_DISABLE;
|
||||
|
||||
if (of_get_property(np, "st,axis-x", &val))
|
||||
pdata->axis_x = val;
|
||||
if (of_get_property(np, "st,axis-y", &val))
|
||||
pdata->axis_y = val;
|
||||
if (of_get_property(np, "st,axis-z", &val))
|
||||
pdata->axis_z = val;
|
||||
|
||||
if (of_get_property(np, "st,default-rate", NULL))
|
||||
pdata->default_rate = val;
|
||||
|
||||
if (of_get_property(np, "st,min-limit-x", &val))
|
||||
pdata->st_min_limits[0] = val;
|
||||
if (of_get_property(np, "st,min-limit-y", &val))
|
||||
pdata->st_min_limits[1] = val;
|
||||
if (of_get_property(np, "st,min-limit-z", &val))
|
||||
pdata->st_min_limits[2] = val;
|
||||
|
||||
if (of_get_property(np, "st,max-limit-x", &val))
|
||||
pdata->st_max_limits[0] = val;
|
||||
if (of_get_property(np, "st,max-limit-y", &val))
|
||||
pdata->st_max_limits[1] = val;
|
||||
if (of_get_property(np, "st,max-limit-z", &val))
|
||||
pdata->st_max_limits[2] = val;
|
||||
|
||||
|
||||
lis3->pdata = pdata;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#else
|
||||
static int lis3lv02d_init_dt(struct lis3lv02d *lis3)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
EXPORT_SYMBOL_GPL(lis3lv02d_init_dt);
|
||||
|
||||
/*
|
||||
* Initialise the accelerometer and the various subsystems.
|
||||
* Should be rather independent of the bus system.
|
||||
|
|
@ -953,6 +1102,10 @@ int lis3lv02d_init_device(struct lis3lv02d *lis3)
|
|||
irq_handler_t thread_fn;
|
||||
int irq_flags = 0;
|
||||
|
||||
err = lis3lv02d_init_dt(lis3);
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
lis3->whoami = lis3lv02d_read_8(lis3, WHO_AM_I);
|
||||
|
||||
switch (lis3->whoami) {
|
||||
|
|
|
|||
|
|
@ -314,6 +314,10 @@ struct lis3lv02d {
|
|||
|
||||
struct lis3lv02d_platform_data *pdata; /* for passing board config */
|
||||
struct mutex mutex; /* Serialize poll and selftest */
|
||||
|
||||
#ifdef CONFIG_OF
|
||||
struct device_node *of_node;
|
||||
#endif
|
||||
};
|
||||
|
||||
int lis3lv02d_init_device(struct lis3lv02d *lis3);
|
||||
|
|
|
|||
Loading…
Reference in New Issue