diff options
Diffstat (limited to 'drivers/pinctrl/uniphier/pinctrl-uniphier-core.c')
| -rw-r--r-- | drivers/pinctrl/uniphier/pinctrl-uniphier-core.c | 912 |
1 files changed, 912 insertions, 0 deletions
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c new file mode 100644 index 000000000..ade348b49 --- /dev/null +++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c @@ -0,0 +1,912 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// Copyright (C) 2015-2017 Socionext Inc. +// Author: Masahiro Yamada <yamada.masahiro@socionext.com> + +#include <linux/list.h> +#include <linux/mfd/syscon.h> +#include <linux/of.h> +#include <linux/pinctrl/pinconf.h> +#include <linux/pinctrl/pinconf-generic.h> +#include <linux/pinctrl/pinctrl.h> +#include <linux/pinctrl/pinmux.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> + +#include "../core.h" +#include "../pinctrl-utils.h" +#include "pinctrl-uniphier.h" + +#define UNIPHIER_PINCTRL_PINMUX_BASE 0x1000 +#define UNIPHIER_PINCTRL_LOAD_PINMUX 0x1700 +#define UNIPHIER_PINCTRL_DRVCTRL_BASE 0x1800 +#define UNIPHIER_PINCTRL_DRV2CTRL_BASE 0x1900 +#define UNIPHIER_PINCTRL_DRV3CTRL_BASE 0x1980 +#define UNIPHIER_PINCTRL_PUPDCTRL_BASE 0x1a00 +#define UNIPHIER_PINCTRL_IECTRL_BASE 0x1d00 + +struct uniphier_pinctrl_reg_region { + struct list_head node; + unsigned int base; + unsigned int nregs; + u32 vals[]; +}; + +struct uniphier_pinctrl_priv { + struct pinctrl_desc pctldesc; + struct pinctrl_dev *pctldev; + struct regmap *regmap; + const struct uniphier_pinctrl_socdata *socdata; + struct list_head reg_regions; +}; + +static int uniphier_pctl_get_groups_count(struct pinctrl_dev *pctldev) +{ + struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev); + + return priv->socdata->groups_count; +} + +static const char *uniphier_pctl_get_group_name(struct pinctrl_dev *pctldev, + unsigned selector) +{ + struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev); + + return priv->socdata->groups[selector].name; +} + +static int uniphier_pctl_get_group_pins(struct pinctrl_dev *pctldev, + unsigned selector, + const unsigned **pins, + unsigned *num_pins) +{ + struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev); + + *pins = priv->socdata->groups[selector].pins; + *num_pins = priv->socdata->groups[selector].num_pins; + + return 0; +} + +#ifdef CONFIG_DEBUG_FS +static void uniphier_pctl_pin_dbg_show(struct pinctrl_dev *pctldev, + struct seq_file *s, unsigned offset) +{ + const struct pin_desc *desc = pin_desc_get(pctldev, offset); + const char *pull_dir, *drv_type; + + switch (uniphier_pin_get_pull_dir(desc->drv_data)) { + case UNIPHIER_PIN_PULL_UP: + pull_dir = "UP"; + break; + case UNIPHIER_PIN_PULL_DOWN: + pull_dir = "DOWN"; + break; + case UNIPHIER_PIN_PULL_UP_FIXED: + pull_dir = "UP(FIXED)"; + break; + case UNIPHIER_PIN_PULL_DOWN_FIXED: + pull_dir = "DOWN(FIXED)"; + break; + case UNIPHIER_PIN_PULL_NONE: + pull_dir = "NONE"; + break; + default: + BUG(); + } + + switch (uniphier_pin_get_drv_type(desc->drv_data)) { + case UNIPHIER_PIN_DRV_1BIT: + drv_type = "4/8(mA)"; + break; + case UNIPHIER_PIN_DRV_2BIT: + drv_type = "8/12/16/20(mA)"; + break; + case UNIPHIER_PIN_DRV_3BIT: + drv_type = "4/5/7/9/11/12/14/16(mA)"; + break; + case UNIPHIER_PIN_DRV_FIXED4: + drv_type = "4(mA)"; + break; + case UNIPHIER_PIN_DRV_FIXED5: + drv_type = "5(mA)"; + break; + case UNIPHIER_PIN_DRV_FIXED8: + drv_type = "8(mA)"; + break; + case UNIPHIER_PIN_DRV_NONE: + drv_type = "NONE"; + break; + default: + BUG(); + } + + seq_printf(s, " PULL_DIR=%s DRV_TYPE=%s", pull_dir, drv_type); +} +#endif + +static const struct pinctrl_ops uniphier_pctlops = { + .get_groups_count = uniphier_pctl_get_groups_count, + .get_group_name = uniphier_pctl_get_group_name, + .get_group_pins = uniphier_pctl_get_group_pins, +#ifdef CONFIG_DEBUG_FS + .pin_dbg_show = uniphier_pctl_pin_dbg_show, +#endif + .dt_node_to_map = pinconf_generic_dt_node_to_map_all, + .dt_free_map = pinctrl_utils_free_map, +}; + +static const unsigned int uniphier_conf_drv_strengths_1bit[] = {4, 8}; +static const unsigned int uniphier_conf_drv_strengths_2bit[] = {8, 12, 16, 20}; +static const unsigned int uniphier_conf_drv_strengths_3bit[] = {4, 5, 7, 9, 11, + 12, 14, 16}; +static const unsigned int uniphier_conf_drv_strengths_fixed4[] = {4}; +static const unsigned int uniphier_conf_drv_strengths_fixed5[] = {5}; +static const unsigned int uniphier_conf_drv_strengths_fixed8[] = {8}; + +static int uniphier_conf_get_drvctrl_data(struct pinctrl_dev *pctldev, + unsigned int pin, unsigned int *reg, + unsigned int *shift, + unsigned int *mask, + const unsigned int **strengths) +{ + const struct pin_desc *desc = pin_desc_get(pctldev, pin); + enum uniphier_pin_drv_type type = + uniphier_pin_get_drv_type(desc->drv_data); + unsigned int base = 0; + unsigned int stride = 0; + unsigned int width = 0; + unsigned int drvctrl; + + switch (type) { + case UNIPHIER_PIN_DRV_1BIT: + *strengths = uniphier_conf_drv_strengths_1bit; + base = UNIPHIER_PINCTRL_DRVCTRL_BASE; + stride = 1; + width = 1; + break; + case UNIPHIER_PIN_DRV_2BIT: + *strengths = uniphier_conf_drv_strengths_2bit; + base = UNIPHIER_PINCTRL_DRV2CTRL_BASE; + stride = 2; + width = 2; + break; + case UNIPHIER_PIN_DRV_3BIT: + *strengths = uniphier_conf_drv_strengths_3bit; + base = UNIPHIER_PINCTRL_DRV3CTRL_BASE; + stride = 4; + width = 3; + break; + case UNIPHIER_PIN_DRV_FIXED4: + *strengths = uniphier_conf_drv_strengths_fixed4; + break; + case UNIPHIER_PIN_DRV_FIXED5: + *strengths = uniphier_conf_drv_strengths_fixed5; + break; + case UNIPHIER_PIN_DRV_FIXED8: + *strengths = uniphier_conf_drv_strengths_fixed8; + break; + default: + /* drive strength control is not supported for this pin */ + return -EINVAL; + } + + drvctrl = uniphier_pin_get_drvctrl(desc->drv_data); + drvctrl *= stride; + + *reg = base + drvctrl / 32 * 4; + *shift = drvctrl % 32; + *mask = (1U << width) - 1; + + return 0; +} + +static int uniphier_conf_pin_bias_get(struct pinctrl_dev *pctldev, + unsigned int pin, + enum pin_config_param param) +{ + struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev); + const struct pin_desc *desc = pin_desc_get(pctldev, pin); + enum uniphier_pin_pull_dir pull_dir = + uniphier_pin_get_pull_dir(desc->drv_data); + unsigned int pupdctrl, reg, shift, val; + unsigned int expected = 1; + int ret; + + switch (param) { + case PIN_CONFIG_BIAS_DISABLE: + if (pull_dir == UNIPHIER_PIN_PULL_NONE) + return 0; + if (pull_dir == UNIPHIER_PIN_PULL_UP_FIXED || + pull_dir == UNIPHIER_PIN_PULL_DOWN_FIXED) + return -EINVAL; + expected = 0; + break; + case PIN_CONFIG_BIAS_PULL_UP: + if (pull_dir == UNIPHIER_PIN_PULL_UP_FIXED) + return 0; + if (pull_dir != UNIPHIER_PIN_PULL_UP) + return -EINVAL; + break; + case PIN_CONFIG_BIAS_PULL_DOWN: + if (pull_dir == UNIPHIER_PIN_PULL_DOWN_FIXED) + return 0; + if (pull_dir != UNIPHIER_PIN_PULL_DOWN) + return -EINVAL; + break; + default: + BUG(); + } + + pupdctrl = uniphier_pin_get_pupdctrl(desc->drv_data); + + reg = UNIPHIER_PINCTRL_PUPDCTRL_BASE + pupdctrl / 32 * 4; + shift = pupdctrl % 32; + + ret = regmap_read(priv->regmap, reg, &val); + if (ret) + return ret; + + val = (val >> shift) & 1; + + return (val == expected) ? 0 : -EINVAL; +} + +static int uniphier_conf_pin_drive_get(struct pinctrl_dev *pctldev, + unsigned int pin, u32 *strength) +{ + struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev); + unsigned int reg, shift, mask, val; + const unsigned int *strengths; + int ret; + + ret = uniphier_conf_get_drvctrl_data(pctldev, pin, ®, &shift, + &mask, &strengths); + if (ret) + return ret; + + if (mask) { + ret = regmap_read(priv->regmap, reg, &val); + if (ret) + return ret; + } else { + val = 0; + } + + *strength = strengths[(val >> shift) & mask]; + + return 0; +} + +static int uniphier_conf_pin_input_enable_get(struct pinctrl_dev *pctldev, + unsigned int pin) +{ + struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev); + const struct pin_desc *desc = pin_desc_get(pctldev, pin); + unsigned int iectrl = uniphier_pin_get_iectrl(desc->drv_data); + unsigned int reg, mask, val; + int ret; + + if (iectrl == UNIPHIER_PIN_IECTRL_NONE) + /* This pin is always input-enabled. */ + return 0; + + if (priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_PERPIN_IECTRL) + iectrl = pin; + + reg = UNIPHIER_PINCTRL_IECTRL_BASE + iectrl / 32 * 4; + mask = BIT(iectrl % 32); + + ret = regmap_read(priv->regmap, reg, &val); + if (ret) + return ret; + + return val & mask ? 0 : -EINVAL; +} + +static int uniphier_conf_pin_config_get(struct pinctrl_dev *pctldev, + unsigned pin, + unsigned long *configs) +{ + enum pin_config_param param = pinconf_to_config_param(*configs); + bool has_arg = false; + u32 arg; + int ret; + + switch (param) { + case PIN_CONFIG_BIAS_DISABLE: + case PIN_CONFIG_BIAS_PULL_UP: + case PIN_CONFIG_BIAS_PULL_DOWN: + ret = uniphier_conf_pin_bias_get(pctldev, pin, param); + break; + case PIN_CONFIG_DRIVE_STRENGTH: + ret = uniphier_conf_pin_drive_get(pctldev, pin, &arg); + has_arg = true; + break; + case PIN_CONFIG_INPUT_ENABLE: + ret = uniphier_conf_pin_input_enable_get(pctldev, pin); + break; + default: + /* unsupported parameter */ + ret = -EINVAL; + break; + } + + if (ret == 0 && has_arg) + *configs = pinconf_to_config_packed(param, arg); + + return ret; +} + +static int uniphier_conf_pin_bias_set(struct pinctrl_dev *pctldev, + unsigned int pin, + enum pin_config_param param, u32 arg) +{ + struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev); + const struct pin_desc *desc = pin_desc_get(pctldev, pin); + enum uniphier_pin_pull_dir pull_dir = + uniphier_pin_get_pull_dir(desc->drv_data); + unsigned int pupdctrl, reg, shift; + unsigned int val = 1; + + switch (param) { + case PIN_CONFIG_BIAS_DISABLE: + if (pull_dir == UNIPHIER_PIN_PULL_NONE) + return 0; + if (pull_dir == UNIPHIER_PIN_PULL_UP_FIXED || + pull_dir == UNIPHIER_PIN_PULL_DOWN_FIXED) { + dev_err(pctldev->dev, + "can not disable pull register for pin %s\n", + desc->name); + return -EINVAL; + } + val = 0; + break; + case PIN_CONFIG_BIAS_PULL_UP: + if (pull_dir == UNIPHIER_PIN_PULL_UP_FIXED && arg != 0) + return 0; + if (pull_dir != UNIPHIER_PIN_PULL_UP) { + dev_err(pctldev->dev, + "pull-up is unsupported for pin %s\n", + desc->name); + return -EINVAL; + } + if (arg == 0) { + dev_err(pctldev->dev, "pull-up can not be total\n"); + return -EINVAL; + } + break; + case PIN_CONFIG_BIAS_PULL_DOWN: + if (pull_dir == UNIPHIER_PIN_PULL_DOWN_FIXED && arg != 0) + return 0; + if (pull_dir != UNIPHIER_PIN_PULL_DOWN) { + dev_err(pctldev->dev, + "pull-down is unsupported for pin %s\n", + desc->name); + return -EINVAL; + } + if (arg == 0) { + dev_err(pctldev->dev, "pull-down can not be total\n"); + return -EINVAL; + } + break; + case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT: + if (pull_dir == UNIPHIER_PIN_PULL_NONE) { + dev_err(pctldev->dev, + "pull-up/down is unsupported for pin %s\n", + desc->name); + return -EINVAL; + } + + if (arg == 0) + return 0; /* configuration ingored */ + break; + default: + BUG(); + } + + pupdctrl = uniphier_pin_get_pupdctrl(desc->drv_data); + + reg = UNIPHIER_PINCTRL_PUPDCTRL_BASE + pupdctrl / 32 * 4; + shift = pupdctrl % 32; + + return regmap_update_bits(priv->regmap, reg, 1 << shift, val << shift); +} + +static int uniphier_conf_pin_drive_set(struct pinctrl_dev *pctldev, + unsigned int pin, u32 strength) +{ + struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev); + const struct pin_desc *desc = pin_desc_get(pctldev, pin); + unsigned int reg, shift, mask, val; + const unsigned int *strengths; + int ret; + + ret = uniphier_conf_get_drvctrl_data(pctldev, pin, ®, &shift, + &mask, &strengths); + if (ret) { + dev_err(pctldev->dev, "cannot set drive strength for pin %s\n", + desc->name); + return ret; + } + + for (val = 0; val <= mask; val++) { + if (strengths[val] > strength) + break; + } + + if (val == 0) { + dev_err(pctldev->dev, + "unsupported drive strength %u mA for pin %s\n", + strength, desc->name); + return -EINVAL; + } + + if (!mask) + return 0; + + val--; + + return regmap_update_bits(priv->regmap, reg, + mask << shift, val << shift); +} + +static int uniphier_conf_pin_input_enable(struct pinctrl_dev *pctldev, + unsigned int pin, u32 enable) +{ + struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev); + const struct pin_desc *desc = pin_desc_get(pctldev, pin); + unsigned int iectrl = uniphier_pin_get_iectrl(desc->drv_data); + unsigned int reg, mask; + + /* + * Multiple pins share one input enable, per-pin disabling is + * impossible. + */ + if (!(priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_PERPIN_IECTRL) && + !enable) + return -EINVAL; + + /* UNIPHIER_PIN_IECTRL_NONE means the pin is always input-enabled */ + if (iectrl == UNIPHIER_PIN_IECTRL_NONE) + return enable ? 0 : -EINVAL; + + if (priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_PERPIN_IECTRL) + iectrl = pin; + + reg = UNIPHIER_PINCTRL_IECTRL_BASE + iectrl / 32 * 4; + mask = BIT(iectrl % 32); + + return regmap_update_bits(priv->regmap, reg, mask, enable ? mask : 0); +} + +static int uniphier_conf_pin_config_set(struct pinctrl_dev *pctldev, + unsigned pin, + unsigned long *configs, + unsigned num_configs) +{ + int i, ret; + + for (i = 0; i < num_configs; i++) { + enum pin_config_param param = + pinconf_to_config_param(configs[i]); + u32 arg = pinconf_to_config_argument(configs[i]); + + switch (param) { + case PIN_CONFIG_BIAS_DISABLE: + case PIN_CONFIG_BIAS_PULL_UP: + case PIN_CONFIG_BIAS_PULL_DOWN: + case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT: + ret = uniphier_conf_pin_bias_set(pctldev, pin, + param, arg); + break; + case PIN_CONFIG_DRIVE_STRENGTH: + ret = uniphier_conf_pin_drive_set(pctldev, pin, arg); + break; + case PIN_CONFIG_INPUT_ENABLE: + ret = uniphier_conf_pin_input_enable(pctldev, pin, arg); + break; + default: + dev_err(pctldev->dev, + "unsupported configuration parameter %u\n", + param); + return -EINVAL; + } + + if (ret) + return ret; + } + + return 0; +} + +static int uniphier_conf_pin_config_group_set(struct pinctrl_dev *pctldev, + unsigned selector, + unsigned long *configs, + unsigned num_configs) +{ + struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev); + const unsigned *pins = priv->socdata->groups[selector].pins; + unsigned num_pins = priv->socdata->groups[selector].num_pins; + int i, ret; + + for (i = 0; i < num_pins; i++) { + ret = uniphier_conf_pin_config_set(pctldev, pins[i], + configs, num_configs); + if (ret) + return ret; + } + + return 0; +} + +static const struct pinconf_ops uniphier_confops = { + .is_generic = true, + .pin_config_get = uniphier_conf_pin_config_get, + .pin_config_set = uniphier_conf_pin_config_set, + .pin_config_group_set = uniphier_conf_pin_config_group_set, +}; + +static int uniphier_pmx_get_functions_count(struct pinctrl_dev *pctldev) +{ + struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev); + + return priv->socdata->functions_count; +} + +static const char *uniphier_pmx_get_function_name(struct pinctrl_dev *pctldev, + unsigned selector) +{ + struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev); + + return priv->socdata->functions[selector].name; +} + +static int uniphier_pmx_get_function_groups(struct pinctrl_dev *pctldev, + unsigned selector, + const char * const **groups, + unsigned *num_groups) +{ + struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev); + + *groups = priv->socdata->functions[selector].groups; + *num_groups = priv->socdata->functions[selector].num_groups; + + return 0; +} + +static int uniphier_pmx_set_one_mux(struct pinctrl_dev *pctldev, unsigned pin, + int muxval) +{ + struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev); + unsigned int mux_bits, reg_stride, reg, reg_end, shift, mask; + bool load_pinctrl; + int ret; + + /* some pins need input-enabling */ + ret = uniphier_conf_pin_input_enable(pctldev, pin, 1); + if (ret) + return ret; + + if (muxval < 0) + return 0; /* dedicated pin; nothing to do for pin-mux */ + + if (priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_DBGMUX_SEPARATE) { + /* + * Mode reg_offset bit_position + * Normal 4 * n shift+3:shift + * Debug 4 * n shift+7:shift+4 + */ + mux_bits = 4; + reg_stride = 8; + load_pinctrl = true; + } else { + /* + * Mode reg_offset bit_position + * Normal 8 * n shift+3:shift + * Debug 8 * n + 4 shift+3:shift + */ + mux_bits = 8; + reg_stride = 4; + load_pinctrl = false; + } + + reg = UNIPHIER_PINCTRL_PINMUX_BASE + pin * mux_bits / 32 * reg_stride; + reg_end = reg + reg_stride; + shift = pin * mux_bits % 32; + mask = (1U << mux_bits) - 1; + + /* + * If reg_stride is greater than 4, the MSB of each pinsel shall be + * stored in the offset+4. + */ + for (; reg < reg_end; reg += 4) { + ret = regmap_update_bits(priv->regmap, reg, + mask << shift, muxval << shift); + if (ret) + return ret; + muxval >>= mux_bits; + } + + if (load_pinctrl) { + ret = regmap_write(priv->regmap, + UNIPHIER_PINCTRL_LOAD_PINMUX, 1); + if (ret) + return ret; + } + + return 0; +} + +static int uniphier_pmx_set_mux(struct pinctrl_dev *pctldev, + unsigned func_selector, + unsigned group_selector) +{ + struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev); + const struct uniphier_pinctrl_group *grp = + &priv->socdata->groups[group_selector]; + int i; + int ret; + + for (i = 0; i < grp->num_pins; i++) { + ret = uniphier_pmx_set_one_mux(pctldev, grp->pins[i], + grp->muxvals[i]); + if (ret) + return ret; + } + + return 0; +} + +static int uniphier_pmx_gpio_request_enable(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned offset) +{ + struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev); + unsigned int gpio_offset; + int muxval, i; + + if (range->pins) { + for (i = 0; i < range->npins; i++) + if (range->pins[i] == offset) + break; + + if (WARN_ON(i == range->npins)) + return -EINVAL; + + gpio_offset = i; + } else { + gpio_offset = offset - range->pin_base; + } + + gpio_offset += range->id; + + muxval = priv->socdata->get_gpio_muxval(offset, gpio_offset); + + return uniphier_pmx_set_one_mux(pctldev, offset, muxval); +} + +static const struct pinmux_ops uniphier_pmxops = { + .get_functions_count = uniphier_pmx_get_functions_count, + .get_function_name = uniphier_pmx_get_function_name, + .get_function_groups = uniphier_pmx_get_function_groups, + .set_mux = uniphier_pmx_set_mux, + .gpio_request_enable = uniphier_pmx_gpio_request_enable, + .strict = true, +}; + +#ifdef CONFIG_PM_SLEEP +static int uniphier_pinctrl_suspend(struct device *dev) +{ + struct uniphier_pinctrl_priv *priv = dev_get_drvdata(dev); + struct uniphier_pinctrl_reg_region *r; + int ret; + + list_for_each_entry(r, &priv->reg_regions, node) { + ret = regmap_bulk_read(priv->regmap, r->base, r->vals, + r->nregs); + if (ret) + return ret; + } + + return 0; +} + +static int uniphier_pinctrl_resume(struct device *dev) +{ + struct uniphier_pinctrl_priv *priv = dev_get_drvdata(dev); + struct uniphier_pinctrl_reg_region *r; + int ret; + + list_for_each_entry(r, &priv->reg_regions, node) { + ret = regmap_bulk_write(priv->regmap, r->base, r->vals, + r->nregs); + if (ret) + return ret; + } + + if (priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_DBGMUX_SEPARATE) { + ret = regmap_write(priv->regmap, + UNIPHIER_PINCTRL_LOAD_PINMUX, 1); + if (ret) + return ret; + } + + return 0; +} + +static int uniphier_pinctrl_add_reg_region(struct device *dev, + struct uniphier_pinctrl_priv *priv, + unsigned int base, + unsigned int count, + unsigned int width) +{ + struct uniphier_pinctrl_reg_region *region; + unsigned int nregs; + + if (!count) + return 0; + + nregs = DIV_ROUND_UP(count * width, 32); + + region = devm_kzalloc(dev, struct_size(region, vals, nregs), + GFP_KERNEL); + if (!region) + return -ENOMEM; + + region->base = base; + region->nregs = nregs; + + list_add_tail(®ion->node, &priv->reg_regions); + + return 0; +} +#endif + +static int uniphier_pinctrl_pm_init(struct device *dev, + struct uniphier_pinctrl_priv *priv) +{ +#ifdef CONFIG_PM_SLEEP + const struct uniphier_pinctrl_socdata *socdata = priv->socdata; + unsigned int num_drvctrl = 0; + unsigned int num_drv2ctrl = 0; + unsigned int num_drv3ctrl = 0; + unsigned int num_pupdctrl = 0; + unsigned int num_iectrl = 0; + unsigned int iectrl, drvctrl, pupdctrl; + enum uniphier_pin_drv_type drv_type; + enum uniphier_pin_pull_dir pull_dir; + int i, ret; + + for (i = 0; i < socdata->npins; i++) { + void *drv_data = socdata->pins[i].drv_data; + + drvctrl = uniphier_pin_get_drvctrl(drv_data); + drv_type = uniphier_pin_get_drv_type(drv_data); + pupdctrl = uniphier_pin_get_pupdctrl(drv_data); + pull_dir = uniphier_pin_get_pull_dir(drv_data); + iectrl = uniphier_pin_get_iectrl(drv_data); + + switch (drv_type) { + case UNIPHIER_PIN_DRV_1BIT: + num_drvctrl = max(num_drvctrl, drvctrl + 1); + break; + case UNIPHIER_PIN_DRV_2BIT: + num_drv2ctrl = max(num_drv2ctrl, drvctrl + 1); + break; + case UNIPHIER_PIN_DRV_3BIT: + num_drv3ctrl = max(num_drv3ctrl, drvctrl + 1); + break; + default: + break; + } + + if (pull_dir == UNIPHIER_PIN_PULL_UP || + pull_dir == UNIPHIER_PIN_PULL_DOWN) + num_pupdctrl = max(num_pupdctrl, pupdctrl + 1); + + if (iectrl != UNIPHIER_PIN_IECTRL_NONE) { + if (socdata->caps & UNIPHIER_PINCTRL_CAPS_PERPIN_IECTRL) + iectrl = i; + num_iectrl = max(num_iectrl, iectrl + 1); + } + } + + INIT_LIST_HEAD(&priv->reg_regions); + + ret = uniphier_pinctrl_add_reg_region(dev, priv, + UNIPHIER_PINCTRL_PINMUX_BASE, + socdata->npins, 8); + if (ret) + return ret; + + ret = uniphier_pinctrl_add_reg_region(dev, priv, + UNIPHIER_PINCTRL_DRVCTRL_BASE, + num_drvctrl, 1); + if (ret) + return ret; + + ret = uniphier_pinctrl_add_reg_region(dev, priv, + UNIPHIER_PINCTRL_DRV2CTRL_BASE, + num_drv2ctrl, 2); + if (ret) + return ret; + + ret = uniphier_pinctrl_add_reg_region(dev, priv, + UNIPHIER_PINCTRL_DRV3CTRL_BASE, + num_drv3ctrl, 3); + if (ret) + return ret; + + ret = uniphier_pinctrl_add_reg_region(dev, priv, + UNIPHIER_PINCTRL_PUPDCTRL_BASE, + num_pupdctrl, 1); + if (ret) + return ret; + + ret = uniphier_pinctrl_add_reg_region(dev, priv, + UNIPHIER_PINCTRL_IECTRL_BASE, + num_iectrl, 1); + if (ret) + return ret; +#endif + return 0; +} + +const struct dev_pm_ops uniphier_pinctrl_pm_ops = { + SET_LATE_SYSTEM_SLEEP_PM_OPS(uniphier_pinctrl_suspend, + uniphier_pinctrl_resume) +}; + +int uniphier_pinctrl_probe(struct platform_device *pdev, + const struct uniphier_pinctrl_socdata *socdata) +{ + struct device *dev = &pdev->dev; + struct uniphier_pinctrl_priv *priv; + struct device_node *parent; + int ret; + + if (!socdata || + !socdata->pins || !socdata->npins || + !socdata->groups || !socdata->groups_count || + !socdata->functions || !socdata->functions_count) { + dev_err(dev, "pinctrl socdata lacks necessary members\n"); + return -EINVAL; + } + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + parent = of_get_parent(dev->of_node); + priv->regmap = syscon_node_to_regmap(parent); + of_node_put(parent); + + if (IS_ERR(priv->regmap)) { + dev_err(dev, "failed to get regmap\n"); + return PTR_ERR(priv->regmap); + } + + priv->socdata = socdata; + priv->pctldesc.name = dev->driver->name; + priv->pctldesc.pins = socdata->pins; + priv->pctldesc.npins = socdata->npins; + priv->pctldesc.pctlops = &uniphier_pctlops; + priv->pctldesc.pmxops = &uniphier_pmxops; + priv->pctldesc.confops = &uniphier_confops; + priv->pctldesc.owner = dev->driver->owner; + + ret = uniphier_pinctrl_pm_init(dev, priv); + if (ret) + return ret; + + priv->pctldev = devm_pinctrl_register(dev, &priv->pctldesc, priv); + if (IS_ERR(priv->pctldev)) { + dev_err(dev, "failed to register UniPhier pinctrl driver\n"); + return PTR_ERR(priv->pctldev); + } + + platform_set_drvdata(pdev, priv); + + return 0; +} |