drivers/tca64xx: Add support for PCAL6416
- Added new part support for PCAL6416 - Added pullup/pulldown configuration support Signed-off-by: Jouni Ukkonen <jouni.ukkonen@unikie.com> Signed-off-by: Jukka Laitinen <jukka.laitinen@tii.ae>
This commit is contained in:
Jouni Ukkonen
Xiang Xiao
parent
710bd199e5
commit
9b8c8bdd7b
3 changed files with 160 additions and 7 deletions
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@ -53,6 +53,9 @@ static uint8_t tca64_input_reg(FAR struct tca64_dev_s *priv, uint8_t pin);
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static uint8_t tca64_output_reg(FAR struct tca64_dev_s *priv, uint8_t pin);
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static uint8_t tca64_polarity_reg(FAR struct tca64_dev_s *priv, uint8_t pin);
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static uint8_t tca64_config_reg(FAR struct tca64_dev_s *priv, uint8_t pin);
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static uint8_t tca64_pdenable_reg(FAR struct tca64_dev_s *priv, uint8_t pin);
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static uint8_t tca64_pdselect_reg(FAR struct tca64_dev_s *priv, uint8_t pin);
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static int tca64_getreg(FAR struct tca64_dev_s *priv, uint8_t regaddr,
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FAR uint8_t *regval, unsigned int count);
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static int tca64_putreg(struct tca64_dev_s *priv, uint8_t regaddr,
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@ -134,6 +137,8 @@ static const struct tca64_part_s g_tca64_parts[TCA64_NPARTS] =
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TCA6408_OUTPUT_REG,
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TCA6408_POLARITY_REG,
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TCA6408_CONFIG_REG,
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TCA64XX_INVALID_REG,
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TCA64XX_INVALID_REG,
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},
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{
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TCA6416_PART,
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@ -142,6 +147,8 @@ static const struct tca64_part_s g_tca64_parts[TCA64_NPARTS] =
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TCA6416_OUTPUT0_REG,
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TCA6416_POLARITY0_REG,
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TCA6416_CONFIG0_REG,
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TCA64XX_INVALID_REG,
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TCA64XX_INVALID_REG,
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},
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{
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TCA6424_PART,
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@ -150,6 +157,18 @@ static const struct tca64_part_s g_tca64_parts[TCA64_NPARTS] =
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TCA6424_OUTPUT0_REG,
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TCA6424_POLARITY0_REG,
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TCA6424_CONFIG0_REG,
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TCA64XX_INVALID_REG,
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TCA64XX_INVALID_REG,
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},
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{
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PCAL6416A_PART,
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MIN(PCAL6416A_NR_GPIOS, CONFIG_IOEXPANDER_NPINS),
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PCAL6416A_INPUT0_REG,
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PCAL6416A_OUTPUT0_REG,
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PCAL6416A_POLARITY0_REG,
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PCAL6416A_CONFIG0_REG,
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PCAL6416A_PU_ENABLE0_REG,
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PCAL6416A_PUPD_SELECT0_REG,
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},
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};
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@ -256,6 +275,50 @@ static uint8_t tca64_config_reg(FAR struct tca64_dev_s *priv, uint8_t pin)
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return reg + (pin >> 3);
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}
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/****************************************************************************
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* Name: tca64_pdenable_reg
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*
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* Description:
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* Return the address of the pu/pd enable register for the specified pin.
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*
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****************************************************************************/
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static uint8_t tca64_pdenable_reg(FAR struct tca64_dev_s *priv, uint8_t pin)
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{
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FAR const struct tca64_part_s *part = tca64_getpart(priv);
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uint8_t reg = part->tp_puenable;
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if (reg == TCA64XX_INVALID_REG)
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{
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return reg;
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}
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DEBUGASSERT(pin <= part->tp_ngpios);
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return reg + (pin >> 3);
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}
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/****************************************************************************
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* Name: tca64_pdselect_reg
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*
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* Description:
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* Return the address of the pu/pd selection register for the specified pin.
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*
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****************************************************************************/
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static uint8_t tca64_pdselect_reg(FAR struct tca64_dev_s *priv, uint8_t pin)
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{
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FAR const struct tca64_part_s *part = tca64_getpart(priv);
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uint8_t reg = part->tp_puselect;
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if (reg == TCA64XX_INVALID_REG)
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{
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return reg;
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}
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DEBUGASSERT(pin <= part->tp_ngpios);
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return reg + (pin >> 3);
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}
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/****************************************************************************
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* Name: tca64_getreg
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*
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@ -375,12 +438,6 @@ static int tca64_direction(FAR struct ioexpander_dev_s *dev, uint8_t pin,
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uint8_t regval;
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int ret;
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if (direction != IOEXPANDER_DIRECTION_IN &&
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direction != IOEXPANDER_DIRECTION_OUT)
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{
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return -EINVAL;
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}
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DEBUGASSERT(priv != NULL && priv->config != NULL &&
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pin < CONFIG_IOEXPANDER_NPINS);
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@ -411,7 +468,9 @@ static int tca64_direction(FAR struct ioexpander_dev_s *dev, uint8_t pin,
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/* Set the pin direction in the I/O Expander */
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if (direction == IOEXPANDER_DIRECTION_IN)
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if ((direction == IOEXPANDER_DIRECTION_IN) ||
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(direction == IOEXPANDER_DIRECTION_IN_PULLDOWN) ||
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(direction == IOEXPANDER_DIRECTION_IN_PULLUP))
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{
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/* Configure pin as input. If a bit in the configuration register is
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* set to 1, the corresponding port pin is enabled as an input with a
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@ -441,6 +500,81 @@ static int tca64_direction(FAR struct ioexpander_dev_s *dev, uint8_t pin,
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regaddr, ret);
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}
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if ((direction == IOEXPANDER_DIRECTION_IN_PULLDOWN) ||
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(direction == IOEXPANDER_DIRECTION_IN_PULLUP))
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{
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regaddr = tca64_pdenable_reg(priv, pin);
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if (regaddr == TCA64XX_INVALID_REG)
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{
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gpioerr("ERROR: This part does not support PU/PD settings\n");
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ret = -EINVAL;
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goto errout_with_lock;
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}
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ret = tca64_getreg(priv, regaddr, ®val, 1);
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if (ret < 0)
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{
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gpioerr("ERROR: Failed to read pu config register at %u: %d\n",
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regaddr, ret);
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goto errout_with_lock;
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}
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regval |= (1 << (pin & 7));
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ret = tca64_putreg(priv, regaddr, ®val, 1);
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if (ret < 0)
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{
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gpioerr("ERROR: Failed to write pu config register at %u: %d\n",
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regaddr, ret);
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goto errout_with_lock;
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}
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regaddr = tca64_pdselect_reg(priv, pin);
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ret = tca64_getreg(priv, regaddr, ®val, 1);
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if (ret < 0)
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{
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gpioerr("ERROR: Failed to read pu select register at %u: %d\n",
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regaddr, ret);
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goto errout_with_lock;
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}
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if (direction == IOEXPANDER_DIRECTION_IN_PULLUP)
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{
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regval |= (1 << (pin & 7));
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}
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else
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{
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regval &= ~(1 << (pin & 7));
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}
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ret = tca64_putreg(priv, regaddr, ®val, 1);
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if (ret < 0)
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{
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gpioerr("ERROR: Failed to write pu select register at %u: %d\n",
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regaddr, ret);
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goto errout_with_lock;
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}
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}
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else if (direction == IOEXPANDER_DIRECTION_IN)
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{
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/* Disable pu/pd if that is available */
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regaddr = tca64_pdenable_reg(priv, pin);
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if (regaddr != TCA64XX_INVALID_REG)
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{
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ret = tca64_getreg(priv, regaddr, ®val, 1);
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if (ret < 0)
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{
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gpioerr("ERROR: Failed to read pu config register at %u: %d\n",
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regaddr, ret);
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goto errout_with_lock;
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}
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regval &= ~(1 << (pin & 7));
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ret = tca64_putreg(priv, regaddr, ®val, 1);
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}
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}
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errout_with_lock:
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nxmutex_unlock(&priv->lock);
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return ret;
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@ -99,6 +99,8 @@
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/* TCA64XX Parts ************************************************************/
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#define TCA64XX_INVALID_REG 0xff
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#define TCA6408_INPUT_REG 0x00
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#define TCA6408_OUTPUT_REG 0x01
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#define TCA6408_POLARITY_REG 0x02
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@ -134,6 +136,20 @@
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#define TCA64XX_NR_GPIO_MAX TCA6424_NR_GPIOS
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#define PCAL6416A_INPUT0_REG 0x00
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#define PCAL6416A_INPUT1_REG 0x01
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#define PCAL6416A_OUTPUT0_REG 0x02
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#define PCAL6416A_OUTPUT1_REG 0x03
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#define PCAL6416A_POLARITY0_REG 0x04
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#define PCAL6416A_POLARITY1_REG 0x05
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#define PCAL6416A_CONFIG0_REG 0x06
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#define PCAL6416A_CONFIG1_REG 0x07
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#define PCAL6416A_PU_ENABLE0_REG 0x46
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#define PCAL6416A_PU_ENABLE1_REG 0x47
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#define PCAL6416A_PUPD_SELECT0_REG 0x48
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#define PCAL6416A_PUPD_SELECT1_REG 0x49
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#define PCAL6416A_NR_GPIOS 16
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/* 1us (datasheet: reset pulse duration (Tw) is 4ns */
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#define TCA64XX_TW 1
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@ -183,6 +199,8 @@ struct tca64_part_s
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uint8_t tp_output; /* Address of first output register */
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uint8_t tp_polarity; /* Address of first polarity register */
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uint8_t tp_config; /* Address of first configuration register */
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uint8_t tp_puenable;
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uint8_t tp_puselect;
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};
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#ifdef CONFIG_IOEXPANDER_INT_ENABLE
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@ -43,6 +43,7 @@ enum tca64xx_part_e
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TCA6408_PART = 0,
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TCA6416_PART,
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TCA6424_PART,
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PCAL6416A_PART,
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TCA64_NPARTS
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};
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