diff options
Diffstat (limited to 'drivers/misc/ad525x_dpot.c')
| -rw-r--r-- | drivers/misc/ad525x_dpot.c | 121 |
1 files changed, 116 insertions, 5 deletions
diff --git a/drivers/misc/ad525x_dpot.c b/drivers/misc/ad525x_dpot.c index 255ba4b5e355..5e6fa8449e8b 100644 --- a/drivers/misc/ad525x_dpot.c +++ b/drivers/misc/ad525x_dpot.c @@ -47,6 +47,11 @@ * AD5280 1 256 20, 50, 200 * AD5282 2 256 20, 50, 200 * ADN2860 3 512 25, 250 + * AD5273 1 64 1, 10, 50, 100 (OTP) + * AD5171 1 64 5, 10, 50, 100 (OTP) + * AD5170 1 256 2.5, 10, 50, 100 (OTP) + * AD5172 2 256 2.5, 10, 50, 100 (OTP) + * AD5173 2 256 2.5, 10, 50, 100 (OTP) * * See Documentation/misc-devices/ad525x_dpot.txt for more info. * @@ -84,7 +89,8 @@ struct dpot_data { unsigned uid; unsigned feat; unsigned wipers; - u16 rdac_cache[8]; + u16 rdac_cache[MAX_RDACS]; + DECLARE_BITMAP(otp_en_mask, MAX_RDACS); }; static inline int dpot_read_d8(struct dpot_data *dpot) @@ -162,6 +168,15 @@ static s32 dpot_read_i2c(struct dpot_data *dpot, u8 reg) ctrl = ((reg & DPOT_RDAC_MASK) == DPOT_RDAC0) ? 0 : DPOT_AD5291_RDAC_AB; return dpot_read_r8d8(dpot, ctrl); + case DPOT_UID(AD5170_ID): + case DPOT_UID(AD5171_ID): + case DPOT_UID(AD5273_ID): + return dpot_read_d8(dpot); + case DPOT_UID(AD5172_ID): + case DPOT_UID(AD5173_ID): + ctrl = ((reg & DPOT_RDAC_MASK) == DPOT_RDAC0) ? + 0 : DPOT_AD5272_3_A0; + return dpot_read_r8d8(dpot, ctrl); default: if ((reg & DPOT_REG_TOL) || (dpot->max_pos > 256)) return dpot_read_r8d16(dpot, (reg & 0xF8) | @@ -242,7 +257,7 @@ static s32 dpot_write_spi(struct dpot_data *dpot, u8 reg, u16 value) static s32 dpot_write_i2c(struct dpot_data *dpot, u8 reg, u16 value) { /* Only write the instruction byte for certain commands */ - unsigned ctrl = 0; + unsigned tmp = 0, ctrl = 0; switch (dpot->uid) { case DPOT_UID(AD5246_ID): @@ -261,6 +276,37 @@ static s32 dpot_write_i2c(struct dpot_data *dpot, u8 reg, u16 value) 0 : DPOT_AD5291_RDAC_AB; return dpot_write_r8d8(dpot, ctrl, value); break; + case DPOT_UID(AD5171_ID): + case DPOT_UID(AD5273_ID): + if (reg & DPOT_ADDR_OTP) { + tmp = dpot_read_d8(dpot); + if (tmp >> 6) /* Ready to Program? */ + return -EFAULT; + ctrl = DPOT_AD5273_FUSE; + } + return dpot_write_r8d8(dpot, ctrl, value); + break; + case DPOT_UID(AD5172_ID): + case DPOT_UID(AD5173_ID): + ctrl = ((reg & DPOT_RDAC_MASK) == DPOT_RDAC0) ? + 0 : DPOT_AD5272_3_A0; + if (reg & DPOT_ADDR_OTP) { + tmp = dpot_read_r8d16(dpot, ctrl); + if (tmp >> 14) /* Ready to Program? */ + return -EFAULT; + ctrl |= DPOT_AD5270_2_3_FUSE; + } + return dpot_write_r8d8(dpot, ctrl, value); + break; + case DPOT_UID(AD5170_ID): + if (reg & DPOT_ADDR_OTP) { + tmp = dpot_read_r8d16(dpot, tmp); + if (tmp >> 14) /* Ready to Program? */ + return -EFAULT; + ctrl = DPOT_AD5270_2_3_FUSE; + } + return dpot_write_r8d8(dpot, ctrl, value); + break; default: if (reg & DPOT_ADDR_CMD) return dpot_write_d8(dpot, reg); @@ -292,6 +338,12 @@ static ssize_t sysfs_show_reg(struct device *dev, struct dpot_data *data = dev_get_drvdata(dev); s32 value; + if (reg & DPOT_ADDR_OTP_EN) + return sprintf(buf, "%s\n", + test_bit(DPOT_RDAC_MASK & reg, data->otp_en_mask) ? + "enabled" : "disabled"); + + mutex_lock(&data->update_lock); value = dpot_read(data, reg); mutex_unlock(&data->update_lock); @@ -320,6 +372,19 @@ static ssize_t sysfs_set_reg(struct device *dev, unsigned long value; int err; + if (reg & DPOT_ADDR_OTP_EN) { + if (!strncmp(buf, "enabled", sizeof("enabled"))) + set_bit(DPOT_RDAC_MASK & reg, data->otp_en_mask); + else + clear_bit(DPOT_RDAC_MASK & reg, data->otp_en_mask); + + return count; + } + + if ((reg & DPOT_ADDR_OTP) && + !test_bit(DPOT_RDAC_MASK & reg, data->otp_en_mask)) + return -EPERM; + err = strict_strtoul(buf, 10, &value); if (err) return err; @@ -331,6 +396,8 @@ static ssize_t sysfs_set_reg(struct device *dev, dpot_write(data, reg, value); if (reg & DPOT_ADDR_EEPROM) msleep(26); /* Sleep while the EEPROM updates */ + else if (reg & DPOT_ADDR_OTP) + msleep(400); /* Sleep while the OTP updates */ mutex_unlock(&data->update_lock); return count; @@ -378,26 +445,38 @@ static DEVICE_ATTR(name, S_IWUSR | S_IRUGO, show_##name, NULL); DPOT_DEVICE_SHOW_SET(rdac0, DPOT_ADDR_RDAC | DPOT_RDAC0); DPOT_DEVICE_SHOW_SET(eeprom0, DPOT_ADDR_EEPROM | DPOT_RDAC0); DPOT_DEVICE_SHOW_ONLY(tolerance0, DPOT_ADDR_EEPROM | DPOT_TOL_RDAC0); +DPOT_DEVICE_SHOW_SET(otp0, DPOT_ADDR_OTP | DPOT_RDAC0); +DPOT_DEVICE_SHOW_SET(otp0en, DPOT_ADDR_OTP_EN | DPOT_RDAC0); DPOT_DEVICE_SHOW_SET(rdac1, DPOT_ADDR_RDAC | DPOT_RDAC1); DPOT_DEVICE_SHOW_SET(eeprom1, DPOT_ADDR_EEPROM | DPOT_RDAC1); DPOT_DEVICE_SHOW_ONLY(tolerance1, DPOT_ADDR_EEPROM | DPOT_TOL_RDAC1); +DPOT_DEVICE_SHOW_SET(otp1, DPOT_ADDR_OTP | DPOT_RDAC1); +DPOT_DEVICE_SHOW_SET(otp1en, DPOT_ADDR_OTP_EN | DPOT_RDAC1); DPOT_DEVICE_SHOW_SET(rdac2, DPOT_ADDR_RDAC | DPOT_RDAC2); DPOT_DEVICE_SHOW_SET(eeprom2, DPOT_ADDR_EEPROM | DPOT_RDAC2); DPOT_DEVICE_SHOW_ONLY(tolerance2, DPOT_ADDR_EEPROM | DPOT_TOL_RDAC2); +DPOT_DEVICE_SHOW_SET(otp2, DPOT_ADDR_OTP | DPOT_RDAC2); +DPOT_DEVICE_SHOW_SET(otp2en, DPOT_ADDR_OTP_EN | DPOT_RDAC2); DPOT_DEVICE_SHOW_SET(rdac3, DPOT_ADDR_RDAC | DPOT_RDAC3); DPOT_DEVICE_SHOW_SET(eeprom3, DPOT_ADDR_EEPROM | DPOT_RDAC3); DPOT_DEVICE_SHOW_ONLY(tolerance3, DPOT_ADDR_EEPROM | DPOT_TOL_RDAC3); +DPOT_DEVICE_SHOW_SET(otp3, DPOT_ADDR_OTP | DPOT_RDAC3); +DPOT_DEVICE_SHOW_SET(otp3en, DPOT_ADDR_OTP_EN | DPOT_RDAC3); DPOT_DEVICE_SHOW_SET(rdac4, DPOT_ADDR_RDAC | DPOT_RDAC4); DPOT_DEVICE_SHOW_SET(eeprom4, DPOT_ADDR_EEPROM | DPOT_RDAC4); DPOT_DEVICE_SHOW_ONLY(tolerance4, DPOT_ADDR_EEPROM | DPOT_TOL_RDAC4); +DPOT_DEVICE_SHOW_SET(otp4, DPOT_ADDR_OTP | DPOT_RDAC4); +DPOT_DEVICE_SHOW_SET(otp4en, DPOT_ADDR_OTP_EN | DPOT_RDAC4); DPOT_DEVICE_SHOW_SET(rdac5, DPOT_ADDR_RDAC | DPOT_RDAC5); DPOT_DEVICE_SHOW_SET(eeprom5, DPOT_ADDR_EEPROM | DPOT_RDAC5); DPOT_DEVICE_SHOW_ONLY(tolerance5, DPOT_ADDR_EEPROM | DPOT_TOL_RDAC5); +DPOT_DEVICE_SHOW_SET(otp5, DPOT_ADDR_OTP | DPOT_RDAC5); +DPOT_DEVICE_SHOW_SET(otp5en, DPOT_ADDR_OTP_EN | DPOT_RDAC5); static const struct attribute *dpot_attrib_wipers[] = { &dev_attr_rdac0.attr, @@ -419,6 +498,26 @@ static const struct attribute *dpot_attrib_eeprom[] = { NULL }; +static const struct attribute *dpot_attrib_otp[] = { + &dev_attr_otp0.attr, + &dev_attr_otp1.attr, + &dev_attr_otp2.attr, + &dev_attr_otp3.attr, + &dev_attr_otp4.attr, + &dev_attr_otp5.attr, + NULL +}; + +static const struct attribute *dpot_attrib_otp_en[] = { + &dev_attr_otp0en.attr, + &dev_attr_otp1en.attr, + &dev_attr_otp2en.attr, + &dev_attr_otp3en.attr, + &dev_attr_otp4en.attr, + &dev_attr_otp5en.attr, + NULL +}; + static const struct attribute *dpot_attrib_tolerance[] = { &dev_attr_tolerance0.attr, &dev_attr_tolerance1.attr, @@ -468,6 +567,12 @@ __devinit int ad_dpot_add_files(struct device *dev, if (features & F_CMD_TOL) err |= sysfs_create_file(&dev->kobj, dpot_attrib_tolerance[rdac]); + if (features & F_CMD_OTP) { + err |= sysfs_create_file(&dev->kobj, + dpot_attrib_otp_en[rdac]); + err |= sysfs_create_file(&dev->kobj, + dpot_attrib_otp[rdac]); + } if (err) dev_err(dev, "failed to register sysfs hooks for RDAC%d\n", @@ -487,6 +592,12 @@ inline void ad_dpot_remove_files(struct device *dev, if (features & F_CMD_TOL) sysfs_remove_file(&dev->kobj, dpot_attrib_tolerance[rdac]); + if (features & F_CMD_OTP) { + sysfs_remove_file(&dev->kobj, + dpot_attrib_otp_en[rdac]); + sysfs_remove_file(&dev->kobj, + dpot_attrib_otp[rdac]); + } } __devinit int ad_dpot_probe(struct device *dev, @@ -514,7 +625,7 @@ __devinit int ad_dpot_probe(struct device *dev, data->uid = DPOT_UID(data->devid); data->wipers = DPOT_WIPERS(data->devid); - for (i = DPOT_RDAC0; i <= DPOT_RDAC5; i++) + for (i = DPOT_RDAC0; i < MAX_RDACS; i++) if (data->wipers & (1 << i)) { err = ad_dpot_add_files(dev, data->feat, i); if (err) @@ -538,7 +649,7 @@ __devinit int ad_dpot_probe(struct device *dev, return 0; exit_remove_files: - for (i = DPOT_RDAC0; i <= DPOT_RDAC5; i++) + for (i = DPOT_RDAC0; i < MAX_RDACS; i++) if (data->wipers & (1 << i)) ad_dpot_remove_files(dev, data->feat, i); @@ -557,7 +668,7 @@ __devexit int ad_dpot_remove(struct device *dev) struct dpot_data *data = dev_get_drvdata(dev); int i; - for (i = DPOT_RDAC0; i <= DPOT_RDAC5; i++) + for (i = DPOT_RDAC0; i < MAX_RDACS; i++) if (data->wipers & (1 << i)) ad_dpot_remove_files(dev, data->feat, i); |
