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pmic: dm: Rewrite pmic_reg_{read|write|clrsetbits} to support 3 bytes transmissions

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This commit provides support for transmissions larger than 1 byte for
PMIC devices used with DM (e.g. MC34708 from NXP).

Signed-off-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Lukasz Majewski 2018-05-15 16:26:36 +02:00 • committed by Stefano Babic
parent b8a6d6777b
commit 655b24cea6
1 changed files with 30 additions and 12 deletions
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42
drivers/power/pmic/pmic-uclass.c
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@ -130,23 +130,35 @@ int pmic_write(struct udevice *dev, uint reg, const uint8_t *buffer, int len)
int pmic_reg_read(struct udevice *dev, uint reg)
{
u8 byte;
struct uc_pmic_priv *priv = dev_get_uclass_priv(dev);
u32 val = 0;
int ret;
debug("%s: reg=%x", __func__, reg);
ret = pmic_read(dev, reg, &byte, 1);
debug(", value=%x, ret=%d\n", byte, ret);
if (priv->trans_len < 1 || priv->trans_len > sizeof(val)) {
debug("Wrong transmission size [%d]\n", priv->trans_len);
return -EINVAL;
}
return ret ? ret : byte;
debug("%s: reg=%x priv->trans_len:%d", __func__, reg, priv->trans_len);
ret = pmic_read(dev, reg, (uint8_t *)&val, priv->trans_len);
debug(", value=%x, ret=%d\n", val, ret);
return ret ? ret : val;
}
int pmic_reg_write(struct udevice *dev, uint reg, uint value)
{
u8 byte = value;
struct uc_pmic_priv *priv = dev_get_uclass_priv(dev);
int ret;
debug("%s: reg=%x, value=%x", __func__, reg, value);
ret = pmic_write(dev, reg, &byte, 1);
if (priv->trans_len < 1 || priv->trans_len > sizeof(value)) {
debug("Wrong transmission size [%d]\n", priv->trans_len);
return -EINVAL;
}
debug("%s: reg=%x, value=%x priv->trans_len:%d", __func__, reg, value,
priv->trans_len);
ret = pmic_write(dev, reg, (uint8_t *)&value, priv->trans_len);
debug(", ret=%d\n", ret);
return ret;
@ -154,15 +166,21 @@ int pmic_reg_write(struct udevice *dev, uint reg, uint value)
int pmic_clrsetbits(struct udevice *dev, uint reg, uint clr, uint set)
{
u8 byte;
struct uc_pmic_priv *priv = dev_get_uclass_priv(dev);
u32 val = 0;
int ret;
ret = pmic_reg_read(dev, reg);
if (priv->trans_len < 1 || priv->trans_len > sizeof(val)) {
debug("Wrong transmission size [%d]\n", priv->trans_len);
return -EINVAL;
}
ret = pmic_read(dev, reg, (uint8_t *)&val, priv->trans_len);
if (ret < 0)
return ret;
byte = (ret & ~clr) | set;
return pmic_reg_write(dev, reg, byte);
val = (val & ~clr) | set;
return pmic_write(dev, reg, (uint8_t *)&val, priv->trans_len);
}
static int pmic_pre_probe(struct udevice *dev)