summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--Documentation/misc-devices/lis3lv02d3
-rw-r--r--drivers/misc/lis3lv02d/lis3lv02d.c42
-rw-r--r--drivers/misc/lis3lv02d/lis3lv02d.h44
-rw-r--r--drivers/misc/lis3lv02d/lis3lv02d_i2c.c7
4 files changed, 87 insertions, 9 deletions
diff --git a/Documentation/misc-devices/lis3lv02d b/Documentation/misc-devices/lis3lv02d
index f1a4ec840f8..af815b9ba41 100644
--- a/Documentation/misc-devices/lis3lv02d
+++ b/Documentation/misc-devices/lis3lv02d
@@ -4,7 +4,8 @@ Kernel driver lis3lv02d
Supported chips:
* STMicroelectronics LIS3LV02DL, LIS3LV02DQ (12 bits precision)
- * STMicroelectronics LIS302DL, LIS3L02DQ, LIS331DL (8 bits)
+ * STMicroelectronics LIS302DL, LIS3L02DQ, LIS331DL (8 bits) and
+ LIS331DLH (16 bits)
Authors:
Yan Burman <burman.yan@gmail.com>
diff --git a/drivers/misc/lis3lv02d/lis3lv02d.c b/drivers/misc/lis3lv02d/lis3lv02d.c
index a981e2a42f9..9d37c576d52 100644
--- a/drivers/misc/lis3lv02d/lis3lv02d.c
+++ b/drivers/misc/lis3lv02d/lis3lv02d.c
@@ -80,6 +80,14 @@
#define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024)
#define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY)
+/*
+ * LIS3331DLH spec says 1LSBs corresponds 4G/1024 -> 1LSB is 1000/1024 mG.
+ * Sensitivity values for +/-2G, outdata in 12 bits for +/-2G scale. so 4
+ * bits adjustment is required
+ */
+#define LIS3DLH_SENSITIVITY_2G ((LIS3_ACCURACY * 1000) / 1024)
+#define SHIFT_ADJ_2G 4
+
#define LIS3_DEFAULT_FUZZ_12B 3
#define LIS3_DEFAULT_FLAT_12B 3
#define LIS3_DEFAULT_FUZZ_8B 1
@@ -135,6 +143,19 @@ static s16 lis3lv02d_read_12(struct lis3lv02d *lis3, int reg)
return (s16)((hi << 8) | lo);
}
+/* 12bits for 2G range, 13 bits for 4G range and 14 bits for 8G range */
+static s16 lis3lv02d_read_16(struct lis3lv02d *lis3, int reg)
+{
+ u8 lo, hi;
+ int v;
+
+ lis3->read(lis3, reg - 1, &lo);
+ lis3->read(lis3, reg, &hi);
+ v = (int) ((hi << 8) | lo);
+
+ return (s16) v >> lis3->shift_adj;
+}
+
/**
* lis3lv02d_get_axis - For the given axis, give the value converted
* @axis: 1,2,3 - can also be negative
@@ -195,6 +216,7 @@ static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z)
static int lis3_12_rates[4] = {40, 160, 640, 2560};
static int lis3_8_rates[2] = {100, 400};
static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000};
+static int lis3_3dlh_rates[4] = {50, 100, 400, 1000};
/* ODR is Output Data Rate */
static int lis3lv02d_get_odr(struct lis3lv02d *lis3)
@@ -267,7 +289,7 @@ static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3])
(LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY));
}
- if (lis3->whoami == WAI_3DC) {
+ if ((lis3->whoami == WAI_3DC) || (lis3->whoami == WAI_3DLH)) {
ctlreg = CTRL_REG4;
selftest = CTRL4_ST0;
} else {
@@ -398,9 +420,17 @@ int lis3lv02d_poweron(struct lis3lv02d *lis3)
lis3->read(lis3, CTRL_REG2, &reg);
if (lis3->whoami == WAI_12B)
reg |= CTRL2_BDU | CTRL2_BOOT;
+ else if (lis3->whoami == WAI_3DLH)
+ reg |= CTRL2_BOOT_3DLH;
else
reg |= CTRL2_BOOT_8B;
lis3->write(lis3, CTRL_REG2, reg);
+
+ if (lis3->whoami == WAI_3DLH) {
+ lis3->read(lis3, CTRL_REG4, &reg);
+ reg |= CTRL4_BDU;
+ lis3->write(lis3, CTRL_REG4, reg);
+ }
}
err = lis3lv02d_get_pwron_wait(lis3);
@@ -956,6 +986,16 @@ int lis3lv02d_init_device(struct lis3lv02d *lis3)
lis3->odr_mask = CTRL1_ODR0|CTRL1_ODR1|CTRL1_ODR2|CTRL1_ODR3;
lis3->scale = LIS3_SENSITIVITY_8B;
break;
+ case WAI_3DLH:
+ pr_info("16 bits 3DLH sensor found\n");
+ lis3->read_data = lis3lv02d_read_16;
+ lis3->mdps_max_val = 2048; /* 12 bits for 2G */
+ lis3->shift_adj = SHIFT_ADJ_2G;
+ lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
+ lis3->odrs = lis3_3dlh_rates;
+ lis3->odr_mask = CTRL1_DR0 | CTRL1_DR1;
+ lis3->scale = LIS3DLH_SENSITIVITY_2G;
+ break;
default:
pr_err("unknown sensor type 0x%X\n", lis3->whoami);
return -EINVAL;
diff --git a/drivers/misc/lis3lv02d/lis3lv02d.h b/drivers/misc/lis3lv02d/lis3lv02d.h
index 2b1482ad3f1..c1a545e136a 100644
--- a/drivers/misc/lis3lv02d/lis3lv02d.h
+++ b/drivers/misc/lis3lv02d/lis3lv02d.h
@@ -26,12 +26,12 @@
/*
* This driver tries to support the "digital" accelerometer chips from
* STMicroelectronics such as LIS3LV02DL, LIS302DL, LIS3L02DQ, LIS331DL,
- * LIS35DE, or LIS202DL. They are very similar in terms of programming, with
- * almost the same registers. In addition to differing on physical properties,
- * they differ on the number of axes (2/3), precision (8/12 bits), and special
- * features (freefall detection, click...). Unfortunately, not all the
- * differences can be probed via a register.
- * They can be connected either via I²C or SPI.
+ * LIS331DLH, LIS35DE, or LIS202DL. They are very similar in terms of
+ * programming, with almost the same registers. In addition to differing
+ * on physical properties, they differ on the number of axes (2/3),
+ * precision (8/12 bits), and special features (freefall detection,
+ * click...). Unfortunately, not all the differences can be probed via
+ * a register. They can be connected either via I²C or SPI.
*/
#include <linux/lis3lv02d.h>
@@ -96,12 +96,22 @@ enum lis3lv02d_reg {
};
enum lis3_who_am_i {
+ WAI_3DLH = 0x32, /* 16 bits: LIS331DLH */
WAI_3DC = 0x33, /* 8 bits: LIS3DC, HP3DC */
WAI_12B = 0x3A, /* 12 bits: LIS3LV02D[LQ]... */
WAI_8B = 0x3B, /* 8 bits: LIS[23]02D[LQ]... */
WAI_6B = 0x52, /* 6 bits: LIS331DLF - not supported */
};
+enum lis3_type {
+ LIS3DC,
+ HP3DC,
+ LIS3LV02D,
+ LIS2302D,
+ LIS331DLF,
+ LIS331DLH,
+};
+
enum lis3lv02d_ctrl1_12b {
CTRL1_Xen = 0x01,
CTRL1_Yen = 0x02,
@@ -129,6 +139,27 @@ enum lis3lv02d_ctrl1_3dc {
CTRL1_ODR3 = 0x80,
};
+enum lis331dlh_ctrl1 {
+ CTRL1_DR0 = 0x08,
+ CTRL1_DR1 = 0x10,
+ CTRL1_PM0 = 0x20,
+ CTRL1_PM1 = 0x40,
+ CTRL1_PM2 = 0x80,
+};
+
+enum lis331dlh_ctrl2 {
+ CTRL2_HPEN1 = 0x04,
+ CTRL2_HPEN2 = 0x08,
+ CTRL2_FDS_3DLH = 0x10,
+ CTRL2_BOOT_3DLH = 0x80,
+};
+
+enum lis331dlh_ctrl4 {
+ CTRL4_STSIGN = 0x08,
+ CTRL4_BLE = 0x40,
+ CTRL4_BDU = 0x80,
+};
+
enum lis3lv02d_ctrl2 {
CTRL2_DAS = 0x01,
CTRL2_SIM = 0x02,
@@ -279,6 +310,7 @@ struct lis3lv02d {
int data_ready_count[2];
atomic_t wake_thread;
unsigned char irq_cfg;
+ unsigned int shift_adj;
struct lis3lv02d_platform_data *pdata; /* for passing board config */
struct mutex mutex; /* Serialize poll and selftest */
diff --git a/drivers/misc/lis3lv02d/lis3lv02d_i2c.c b/drivers/misc/lis3lv02d/lis3lv02d_i2c.c
index e8c0019da97..15255eb8ac8 100644
--- a/drivers/misc/lis3lv02d/lis3lv02d_i2c.c
+++ b/drivers/misc/lis3lv02d/lis3lv02d_i2c.c
@@ -90,7 +90,11 @@ static int lis3_i2c_init(struct lis3lv02d *lis3)
if (ret < 0)
return ret;
- reg |= CTRL1_PD0 | CTRL1_Xen | CTRL1_Yen | CTRL1_Zen;
+ if (lis3->whoami == WAI_3DLH)
+ reg |= CTRL1_PM0 | CTRL1_Xen | CTRL1_Yen | CTRL1_Zen;
+ else
+ reg |= CTRL1_PD0 | CTRL1_Xen | CTRL1_Yen | CTRL1_Zen;
+
return lis3->write(lis3, CTRL_REG1, reg);
}
@@ -232,6 +236,7 @@ static int lis3_i2c_runtime_resume(struct device *dev)
static const struct i2c_device_id lis3lv02d_id[] = {
{"lis3lv02d", 0 },
+ {"lis331dlh", LIS331DLH},
{}
};
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-26 12:10:00 +0000