diff options
Diffstat (limited to 'drivers/misc/lis3lv02d/lis3lv02d.c')
| -rw-r--r-- | drivers/misc/lis3lv02d/lis3lv02d.c | 192 |
1 files changed, 191 insertions, 1 deletions
diff --git a/drivers/misc/lis3lv02d/lis3lv02d.c b/drivers/misc/lis3lv02d/lis3lv02d.c index a981e2a42f92..4a87e5c0a320 100644 --- a/drivers/misc/lis3lv02d/lis3lv02d.c +++ b/drivers/misc/lis3lv02d/lis3lv02d.c @@ -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" @@ -80,6 +81,15 @@ #define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024) #define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY) +/* + * LIS331DLH spec says 1LSBs corresponds 4G/4096 -> 1LSB is 1000/1024 mG. + * Below macros defines sensitivity values for +/-2G. Dataout bits for + * +/-2G range is 12 bits so 4 bits adjustment must be done to get 12bit + * data from 16bit value. Currently this driver supports only 2G range. + */ +#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 +145,19 @@ 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 lis331dlh_read_data(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 +218,7 @@ 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 +291,7 @@ 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 +422,17 @@ int lis3lv02d_poweron(struct lis3lv02d *lis3) lis3->read(lis3, CTRL_REG2, ®); 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 |= CTRL4_BDU; + lis3->write(lis3, CTRL_REG4, reg); + } } err = lis3lv02d_get_pwron_wait(lis3); @@ -912,6 +944,154 @@ static void lis3lv02d_8b_configure(struct lis3lv02d *lis3, } } +#ifdef CONFIG_OF +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 +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. @@ -956,6 +1136,16 @@ 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 lis331dlh sensor found\n"); + lis3->read_data = lis331dlh_read_data; + 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; |