diff options
author | Michael Hennerich <michael.hennerich@analog.com> | 2010-10-26 21:22:36 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-26 23:52:14 (GMT) |
commit | a4bd394956f20d0bfc0ca6ecfac2af4150da274a (patch) | |
tree | 5513a0ad4c7cedeb98fc0c521ff13d39752e729d /drivers/misc | |
parent | 5f400cf40fc703673aa791966ffb1c628c1ff45a (diff) | |
download | linux-fsl-qoriq-a4bd394956f20d0bfc0ca6ecfac2af4150da274a.tar.xz |
drivers/misc/ad525x_dpot.c: new features
Add support for AD5270, AD5271, AD5272, AD5274 digital potentiometers.
Add 20-TP feature for AD5291 and AD5292 parts, and update feature list.
AD5291 rdac read back must be shifted by two.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Chris Verges <chrisv@cyberswitching.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc')
-rw-r--r-- | drivers/misc/Kconfig | 3 | ||||
-rw-r--r-- | drivers/misc/ad525x_dpot-i2c.c | 2 | ||||
-rw-r--r-- | drivers/misc/ad525x_dpot-spi.c | 2 | ||||
-rw-r--r-- | drivers/misc/ad525x_dpot.c | 107 | ||||
-rw-r--r-- | drivers/misc/ad525x_dpot.h | 23 |
5 files changed, 123 insertions, 14 deletions
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 1f69743..3d57adf 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -24,7 +24,8 @@ config AD525X_DPOT AD5260, AD5262, AD5263, AD5290, AD5291, AD5292, AD5293, AD7376, AD8400, AD8402, AD8403, ADN2850, AD5241, AD5242, AD5243, AD5245, AD5246, AD5247, AD5248, AD5280, AD5282, - ADN2860, AD5273, AD5171, AD5170, AD5172, AD5173 + ADN2860, AD5273, AD5171, AD5170, AD5172, AD5173, AD5270, + AD5271, AD5272, AD5274 digital potentiometer chips. See Documentation/misc-devices/ad525x_dpot.txt for the diff --git a/drivers/misc/ad525x_dpot-i2c.c b/drivers/misc/ad525x_dpot-i2c.c index 374352a..4ff73c2 100644 --- a/drivers/misc/ad525x_dpot-i2c.c +++ b/drivers/misc/ad525x_dpot-i2c.c @@ -102,6 +102,8 @@ static const struct i2c_device_id ad_dpot_id[] = { {"ad5170", AD5170_ID}, {"ad5172", AD5172_ID}, {"ad5173", AD5173_ID}, + {"ad5272", AD5272_ID}, + {"ad5274", AD5274_ID}, {} }; MODULE_DEVICE_TABLE(i2c, ad_dpot_id); diff --git a/drivers/misc/ad525x_dpot-spi.c b/drivers/misc/ad525x_dpot-spi.c index 6cfcb63..7f9a55a 100644 --- a/drivers/misc/ad525x_dpot-spi.c +++ b/drivers/misc/ad525x_dpot-spi.c @@ -38,6 +38,8 @@ static const struct ad_dpot_id ad_dpot_spi_devlist[] = { {.name = "ad8402", .devid = AD8402_ID}, {.name = "ad8403", .devid = AD8403_ID}, {.name = "adn2850", .devid = ADN2850_ID}, + {.name = "ad5270", .devid = AD5270_ID}, + {.name = "ad5271", .devid = AD5271_ID}, {} }; diff --git a/drivers/misc/ad525x_dpot.c b/drivers/misc/ad525x_dpot.c index 9698c75..7cb9110 100644 --- a/drivers/misc/ad525x_dpot.c +++ b/drivers/misc/ad525x_dpot.c @@ -29,9 +29,9 @@ * AD5262 2 256 20, 50, 200 * AD5263 4 256 20, 50, 200 * AD5290 1 256 10, 50, 100 - * AD5291 1 256 20 - * AD5292 1 1024 20 - * AD5293 1 1024 20 + * AD5291 1 256 20, 50, 100 (20-TP) + * AD5292 1 1024 20, 50, 100 (20-TP) + * AD5293 1 1024 20, 50, 100 * AD7376 1 128 10, 50, 100, 1M * AD8400 1 256 1, 10, 50, 100 * AD8402 2 256 1, 10, 50, 100 @@ -52,6 +52,10 @@ * 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) + * AD5270 1 1024 20, 50, 100 (50-TP) + * AD5271 1 256 20, 50, 100 (50-TP) + * AD5272 1 1024 20, 50, 100 (50-TP) + * AD5274 1 256 20, 50, 100 (50-TP) * * See Documentation/misc-devices/ad525x_dpot.txt for more info. * @@ -126,18 +130,38 @@ static inline int dpot_write_r8d16(struct dpot_data *dpot, u8 reg, u16 val) static s32 dpot_read_spi(struct dpot_data *dpot, u8 reg) { unsigned ctrl = 0; + int value; if (!(reg & (DPOT_ADDR_EEPROM | DPOT_ADDR_CMD))) { if (dpot->feat & F_RDACS_WONLY) return dpot->rdac_cache[reg & DPOT_RDAC_MASK]; - if (dpot->uid == DPOT_UID(AD5291_ID) || dpot->uid == DPOT_UID(AD5292_ID) || - dpot->uid == DPOT_UID(AD5293_ID)) - return dpot_read_r8d8(dpot, + dpot->uid == DPOT_UID(AD5293_ID)) { + + value = dpot_read_r8d8(dpot, DPOT_AD5291_READ_RDAC << 2); + if (dpot->uid == DPOT_UID(AD5291_ID)) + value = value >> 2; + + return value; + } else if (dpot->uid == DPOT_UID(AD5270_ID) || + dpot->uid == DPOT_UID(AD5271_ID)) { + + value = dpot_read_r8d8(dpot, + DPOT_AD5270_1_2_4_READ_RDAC << 2); + + if (value < 0) + return value; + + if (dpot->uid == DPOT_UID(AD5271_ID)) + value = value >> 2; + + return value; + } + ctrl = DPOT_SPI_READ_RDAC; } else if (reg & DPOT_ADDR_EEPROM) { ctrl = DPOT_SPI_READ_EEPROM; @@ -153,6 +177,7 @@ static s32 dpot_read_spi(struct dpot_data *dpot, u8 reg) static s32 dpot_read_i2c(struct dpot_data *dpot, u8 reg) { + int value; unsigned ctrl = 0; switch (dpot->uid) { case DPOT_UID(AD5246_ID): @@ -177,6 +202,25 @@ static s32 dpot_read_i2c(struct dpot_data *dpot, u8 reg) ctrl = ((reg & DPOT_RDAC_MASK) == DPOT_RDAC0) ? 0 : DPOT_AD5172_3_A0; return dpot_read_r8d8(dpot, ctrl); + case DPOT_UID(AD5272_ID): + case DPOT_UID(AD5274_ID): + dpot_write_r8d8(dpot, + (DPOT_AD5270_1_2_4_READ_RDAC << 2), 0); + + value = dpot_read_r8d16(dpot, + DPOT_AD5270_1_2_4_RDAC << 2); + + if (value < 0) + return value; + /* + * AD5272/AD5274 returns high byte first, however + * underling smbus expects low byte first. + */ + value = swab16(value); + + if (dpot->uid == DPOT_UID(AD5271_ID)) + value = value >> 2; + return value; default: if ((reg & DPOT_REG_TOL) || (dpot->max_pos > 256)) return dpot_read_r8d16(dpot, (reg & 0xF8) | @@ -198,7 +242,7 @@ static s32 dpot_write_spi(struct dpot_data *dpot, u8 reg, u16 value) { unsigned val = 0; - if (!(reg & (DPOT_ADDR_EEPROM | DPOT_ADDR_CMD))) { + if (!(reg & (DPOT_ADDR_EEPROM | DPOT_ADDR_CMD | DPOT_ADDR_OTP))) { if (dpot->feat & F_RDACS_WONLY) dpot->rdac_cache[reg & DPOT_RDAC_MASK] = value; @@ -219,11 +263,30 @@ static s32 dpot_write_spi(struct dpot_data *dpot, u8 reg, u16 value) } else { if (dpot->uid == DPOT_UID(AD5291_ID) || dpot->uid == DPOT_UID(AD5292_ID) || - dpot->uid == DPOT_UID(AD5293_ID)) + dpot->uid == DPOT_UID(AD5293_ID)) { + + dpot_write_r8d8(dpot, DPOT_AD5291_CTRLREG << 2, + DPOT_AD5291_UNLOCK_CMD); + + if (dpot->uid == DPOT_UID(AD5291_ID)) + value = value << 2; + return dpot_write_r8d8(dpot, (DPOT_AD5291_RDAC << 2) | (value >> 8), value & 0xFF); + } else if (dpot->uid == DPOT_UID(AD5270_ID) || + dpot->uid == DPOT_UID(AD5271_ID)) { + dpot_write_r8d8(dpot, + DPOT_AD5270_1_2_4_CTRLREG << 2, + DPOT_AD5270_1_2_4_UNLOCK_CMD); + + if (dpot->uid == DPOT_UID(AD5271_ID)) + value = value << 2; + return dpot_write_r8d8(dpot, + (DPOT_AD5270_1_2_4_RDAC << 2) | + (value >> 8), value & 0xFF); + } val = DPOT_SPI_RDAC | (reg & DPOT_RDAC_MASK); } } else if (reg & DPOT_ADDR_EEPROM) { @@ -243,6 +306,16 @@ static s32 dpot_write_spi(struct dpot_data *dpot, u8 reg, u16 value) val = DPOT_SPI_INC_ALL; break; } + } else if (reg & DPOT_ADDR_OTP) { + if (dpot->uid == DPOT_UID(AD5291_ID) || + dpot->uid == DPOT_UID(AD5292_ID)) { + return dpot_write_r8d8(dpot, + DPOT_AD5291_STORE_XTPM << 2, 0); + } else if (dpot->uid == DPOT_UID(AD5270_ID) || + dpot->uid == DPOT_UID(AD5271_ID)) { + return dpot_write_r8d8(dpot, + DPOT_AD5270_1_2_4_STORE_XTPM << 2, 0); + } } else BUG(); @@ -303,10 +376,25 @@ static s32 dpot_write_i2c(struct dpot_data *dpot, u8 reg, u16 value) tmp = dpot_read_r8d16(dpot, tmp); if (tmp >> 14) /* Ready to Program? */ return -EFAULT; - ctrl = DPOT_AD5270_2_3_FUSE; + ctrl = DPOT_AD5170_2_3_FUSE; } return dpot_write_r8d8(dpot, ctrl, value); break; + case DPOT_UID(AD5272_ID): + case DPOT_UID(AD5274_ID): + dpot_write_r8d8(dpot, DPOT_AD5270_1_2_4_CTRLREG << 2, + DPOT_AD5270_1_2_4_UNLOCK_CMD); + + if (reg & DPOT_ADDR_OTP) + return dpot_write_r8d8(dpot, + DPOT_AD5270_1_2_4_STORE_XTPM << 2, 0); + + if (dpot->uid == DPOT_UID(AD5274_ID)) + value = value << 2; + + return dpot_write_r8d8(dpot, (DPOT_AD5270_1_2_4_RDAC << 2) | + (value >> 8), value & 0xFF); + break; default: if (reg & DPOT_ADDR_CMD) return dpot_write_d8(dpot, reg); @@ -320,7 +408,6 @@ static s32 dpot_write_i2c(struct dpot_data *dpot, u8 reg, u16 value) } } - static s32 dpot_write(struct dpot_data *dpot, u8 reg, u16 value) { if (dpot->feat & F_SPI) diff --git a/drivers/misc/ad525x_dpot.h b/drivers/misc/ad525x_dpot.h index 7609d49..3b9e355 100644 --- a/drivers/misc/ad525x_dpot.h +++ b/drivers/misc/ad525x_dpot.h @@ -93,8 +93,10 @@ enum dpot_devid { BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 23), AD5290_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT, BRDAC0, 8, 24), - AD5291_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT, BRDAC0, 8, 25), - AD5292_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT, BRDAC0, 10, 26), + AD5291_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT | F_CMD_OTP, + BRDAC0, 8, 25), + AD5292_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT | F_CMD_OTP, + BRDAC0, 10, 26), AD5293_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT, BRDAC0, 10, 27), AD7376_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT, BRDAC0, 7, 28), @@ -122,6 +124,12 @@ enum dpot_devid { AD5170_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0, 8, 45), AD5172_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0 | BRDAC1, 8, 46), AD5173_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0 | BRDAC1, 8, 47), + AD5270_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP | F_SPI_16BIT, + BRDAC0, 10, 48), + AD5271_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP | F_SPI_16BIT, + BRDAC0, 8, 49), + AD5272_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0, 10, 50), + AD5274_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0, 8, 51), }; #define DPOT_RDAC0 0 @@ -165,10 +173,19 @@ enum dpot_devid { /* AD5291/2/3 use special commands */ #define DPOT_AD5291_RDAC 0x01 #define DPOT_AD5291_READ_RDAC 0x02 +#define DPOT_AD5291_STORE_XTPM 0x03 +#define DPOT_AD5291_CTRLREG 0x06 +#define DPOT_AD5291_UNLOCK_CMD 0x03 -#define DPOT_AD5291_RDAC_AB 0x80 +/* AD5270/1/2/4 use special commands */ +#define DPOT_AD5270_1_2_4_RDAC 0x01 +#define DPOT_AD5270_1_2_4_READ_RDAC 0x02 +#define DPOT_AD5270_1_2_4_STORE_XTPM 0x03 +#define DPOT_AD5270_1_2_4_CTRLREG 0x07 +#define DPOT_AD5270_1_2_4_UNLOCK_CMD 0x03 #define DPOT_AD5282_RDAC_AB 0x80 + #define DPOT_AD5273_FUSE 0x80 #define DPOT_AD5170_2_3_FUSE 0x20 #define DPOT_AD5170_2_3_OW 0x08 |