diff options
Diffstat (limited to 'drivers/pinctrl/qcom/pinctrl-lpass-lpi.c')
| -rw-r--r-- | drivers/pinctrl/qcom/pinctrl-lpass-lpi.c | 70 |
1 files changed, 45 insertions, 25 deletions
diff --git a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c index 9651aed048..0d98008e33 100644 --- a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c +++ b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c @@ -186,6 +186,41 @@ static int lpi_config_get(struct pinctrl_dev *pctldev, return 0; } +static int lpi_config_set_slew_rate(struct lpi_pinctrl *pctrl, + const struct lpi_pingroup *g, + unsigned int group, unsigned int slew) +{ + unsigned long sval; + void __iomem *reg; + int slew_offset; + + if (slew > LPI_SLEW_RATE_MAX) { + dev_err(pctrl->dev, "invalid slew rate %u for pin: %d\n", + slew, group); + return -EINVAL; + } + + slew_offset = g->slew_offset; + if (slew_offset == LPI_NO_SLEW) + return 0; + + if (pctrl->data->flags & LPI_FLAG_SLEW_RATE_SAME_REG) + reg = pctrl->tlmm_base + LPI_TLMM_REG_OFFSET * group + LPI_GPIO_CFG_REG; + else + reg = pctrl->slew_base + LPI_SLEW_RATE_CTL_REG; + + mutex_lock(&pctrl->lock); + + sval = ioread32(reg); + sval &= ~(LPI_SLEW_RATE_MASK << slew_offset); + sval |= slew << slew_offset; + iowrite32(sval, reg); + + mutex_unlock(&pctrl->lock); + + return 0; +} + static int lpi_config_set(struct pinctrl_dev *pctldev, unsigned int group, unsigned long *configs, unsigned int nconfs) { @@ -193,8 +228,7 @@ static int lpi_config_set(struct pinctrl_dev *pctldev, unsigned int group, unsigned int param, arg, pullup = LPI_GPIO_BIAS_DISABLE, strength = 2; bool value, output_enabled = false; const struct lpi_pingroup *g; - unsigned long sval; - int i, slew_offset; + int i, ret; u32 val; g = &pctrl->data->groups[group]; @@ -226,24 +260,9 @@ static int lpi_config_set(struct pinctrl_dev *pctldev, unsigned int group, strength = arg; break; case PIN_CONFIG_SLEW_RATE: - if (arg > LPI_SLEW_RATE_MAX) { - dev_err(pctldev->dev, "invalid slew rate %u for pin: %d\n", - arg, group); - return -EINVAL; - } - - slew_offset = g->slew_offset; - if (slew_offset == LPI_NO_SLEW) - break; - - mutex_lock(&pctrl->lock); - - sval = ioread32(pctrl->slew_base + LPI_SLEW_RATE_CTL_REG); - sval &= ~(LPI_SLEW_RATE_MASK << slew_offset); - sval |= arg << slew_offset; - iowrite32(sval, pctrl->slew_base + LPI_SLEW_RATE_CTL_REG); - - mutex_unlock(&pctrl->lock); + ret = lpi_config_set_slew_rate(pctrl, g, group, arg); + if (ret) + return ret; break; default: return -EINVAL; @@ -319,7 +338,6 @@ static void lpi_gpio_set(struct gpio_chip *chip, unsigned int pin, int value) } #ifdef CONFIG_DEBUG_FS -#include <linux/seq_file.h> static unsigned int lpi_regval_to_drive(u32 val) { @@ -439,10 +457,12 @@ int lpi_pinctrl_probe(struct platform_device *pdev) return dev_err_probe(dev, PTR_ERR(pctrl->tlmm_base), "TLMM resource not provided\n"); - pctrl->slew_base = devm_platform_ioremap_resource(pdev, 1); - if (IS_ERR(pctrl->slew_base)) - return dev_err_probe(dev, PTR_ERR(pctrl->slew_base), - "Slew resource not provided\n"); + if (!(data->flags & LPI_FLAG_SLEW_RATE_SAME_REG)) { + pctrl->slew_base = devm_platform_ioremap_resource(pdev, 1); + if (IS_ERR(pctrl->slew_base)) + return dev_err_probe(dev, PTR_ERR(pctrl->slew_base), + "Slew resource not provided\n"); + } ret = devm_clk_bulk_get_optional(dev, MAX_LPI_NUM_CLKS, pctrl->clks); if (ret) |