diff options
Diffstat (limited to 'drivers/pinctrl/intel/pinctrl-intel.c')
| -rw-r--r-- | drivers/pinctrl/intel/pinctrl-intel.c | 1580 |
1 files changed, 1580 insertions, 0 deletions
diff --git a/drivers/pinctrl/intel/pinctrl-intel.c b/drivers/pinctrl/intel/pinctrl-intel.c new file mode 100644 index 000000000..5e0adb00b --- /dev/null +++ b/drivers/pinctrl/intel/pinctrl-intel.c @@ -0,0 +1,1580 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Intel pinctrl/GPIO core driver. + * + * Copyright (C) 2015, Intel Corporation + * Authors: Mathias Nyman <mathias.nyman@linux.intel.com> + * Mika Westerberg <mika.westerberg@linux.intel.com> + */ + +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/gpio/driver.h> +#include <linux/log2.h> +#include <linux/platform_device.h> +#include <linux/pinctrl/pinctrl.h> +#include <linux/pinctrl/pinmux.h> +#include <linux/pinctrl/pinconf.h> +#include <linux/pinctrl/pinconf-generic.h> + +#include "../core.h" +#include "pinctrl-intel.h" + +/* Offset from regs */ +#define REVID 0x000 +#define REVID_SHIFT 16 +#define REVID_MASK GENMASK(31, 16) + +#define PADBAR 0x00c +#define GPI_IS 0x100 + +#define PADOWN_BITS 4 +#define PADOWN_SHIFT(p) ((p) % 8 * PADOWN_BITS) +#define PADOWN_MASK(p) (0xf << PADOWN_SHIFT(p)) +#define PADOWN_GPP(p) ((p) / 8) + +/* Offset from pad_regs */ +#define PADCFG0 0x000 +#define PADCFG0_RXEVCFG_SHIFT 25 +#define PADCFG0_RXEVCFG_MASK (3 << PADCFG0_RXEVCFG_SHIFT) +#define PADCFG0_RXEVCFG_LEVEL 0 +#define PADCFG0_RXEVCFG_EDGE 1 +#define PADCFG0_RXEVCFG_DISABLED 2 +#define PADCFG0_RXEVCFG_EDGE_BOTH 3 +#define PADCFG0_PREGFRXSEL BIT(24) +#define PADCFG0_RXINV BIT(23) +#define PADCFG0_GPIROUTIOXAPIC BIT(20) +#define PADCFG0_GPIROUTSCI BIT(19) +#define PADCFG0_GPIROUTSMI BIT(18) +#define PADCFG0_GPIROUTNMI BIT(17) +#define PADCFG0_PMODE_SHIFT 10 +#define PADCFG0_PMODE_MASK (0xf << PADCFG0_PMODE_SHIFT) +#define PADCFG0_PMODE_GPIO 0 +#define PADCFG0_GPIORXDIS BIT(9) +#define PADCFG0_GPIOTXDIS BIT(8) +#define PADCFG0_GPIORXSTATE BIT(1) +#define PADCFG0_GPIOTXSTATE BIT(0) + +#define PADCFG1 0x004 +#define PADCFG1_TERM_UP BIT(13) +#define PADCFG1_TERM_SHIFT 10 +#define PADCFG1_TERM_MASK (7 << PADCFG1_TERM_SHIFT) +#define PADCFG1_TERM_20K 4 +#define PADCFG1_TERM_2K 3 +#define PADCFG1_TERM_5K 2 +#define PADCFG1_TERM_1K 1 + +#define PADCFG2 0x008 +#define PADCFG2_DEBEN BIT(0) +#define PADCFG2_DEBOUNCE_SHIFT 1 +#define PADCFG2_DEBOUNCE_MASK GENMASK(4, 1) + +#define DEBOUNCE_PERIOD 31250 /* ns */ + +struct intel_pad_context { + u32 padcfg0; + u32 padcfg1; + u32 padcfg2; +}; + +struct intel_community_context { + u32 *intmask; +}; + +struct intel_pinctrl_context { + struct intel_pad_context *pads; + struct intel_community_context *communities; +}; + +/** + * struct intel_pinctrl - Intel pinctrl private structure + * @dev: Pointer to the device structure + * @lock: Lock to serialize register access + * @pctldesc: Pin controller description + * @pctldev: Pointer to the pin controller device + * @chip: GPIO chip in this pin controller + * @soc: SoC/PCH specific pin configuration data + * @communities: All communities in this pin controller + * @ncommunities: Number of communities in this pin controller + * @context: Configuration saved over system sleep + * @irq: pinctrl/GPIO chip irq number + */ +struct intel_pinctrl { + struct device *dev; + raw_spinlock_t lock; + struct pinctrl_desc pctldesc; + struct pinctrl_dev *pctldev; + struct gpio_chip chip; + const struct intel_pinctrl_soc_data *soc; + struct intel_community *communities; + size_t ncommunities; + struct intel_pinctrl_context context; + int irq; +}; + +#define pin_to_padno(c, p) ((p) - (c)->pin_base) +#define padgroup_offset(g, p) ((p) - (g)->base) + +static struct intel_community *intel_get_community(struct intel_pinctrl *pctrl, + unsigned pin) +{ + struct intel_community *community; + int i; + + for (i = 0; i < pctrl->ncommunities; i++) { + community = &pctrl->communities[i]; + if (pin >= community->pin_base && + pin < community->pin_base + community->npins) + return community; + } + + dev_warn(pctrl->dev, "failed to find community for pin %u\n", pin); + return NULL; +} + +static const struct intel_padgroup * +intel_community_get_padgroup(const struct intel_community *community, + unsigned pin) +{ + int i; + + for (i = 0; i < community->ngpps; i++) { + const struct intel_padgroup *padgrp = &community->gpps[i]; + + if (pin >= padgrp->base && pin < padgrp->base + padgrp->size) + return padgrp; + } + + return NULL; +} + +static void __iomem *intel_get_padcfg(struct intel_pinctrl *pctrl, unsigned pin, + unsigned reg) +{ + const struct intel_community *community; + unsigned padno; + size_t nregs; + + community = intel_get_community(pctrl, pin); + if (!community) + return NULL; + + padno = pin_to_padno(community, pin); + nregs = (community->features & PINCTRL_FEATURE_DEBOUNCE) ? 4 : 2; + + if (reg == PADCFG2 && !(community->features & PINCTRL_FEATURE_DEBOUNCE)) + return NULL; + + return community->pad_regs + reg + padno * nregs * 4; +} + +static bool intel_pad_owned_by_host(struct intel_pinctrl *pctrl, unsigned pin) +{ + const struct intel_community *community; + const struct intel_padgroup *padgrp; + unsigned gpp, offset, gpp_offset; + void __iomem *padown; + + community = intel_get_community(pctrl, pin); + if (!community) + return false; + if (!community->padown_offset) + return true; + + padgrp = intel_community_get_padgroup(community, pin); + if (!padgrp) + return false; + + gpp_offset = padgroup_offset(padgrp, pin); + gpp = PADOWN_GPP(gpp_offset); + offset = community->padown_offset + padgrp->padown_num * 4 + gpp * 4; + padown = community->regs + offset; + + return !(readl(padown) & PADOWN_MASK(gpp_offset)); +} + +static bool intel_pad_acpi_mode(struct intel_pinctrl *pctrl, unsigned pin) +{ + const struct intel_community *community; + const struct intel_padgroup *padgrp; + unsigned offset, gpp_offset; + void __iomem *hostown; + + community = intel_get_community(pctrl, pin); + if (!community) + return true; + if (!community->hostown_offset) + return false; + + padgrp = intel_community_get_padgroup(community, pin); + if (!padgrp) + return true; + + gpp_offset = padgroup_offset(padgrp, pin); + offset = community->hostown_offset + padgrp->reg_num * 4; + hostown = community->regs + offset; + + return !(readl(hostown) & BIT(gpp_offset)); +} + +static bool intel_pad_locked(struct intel_pinctrl *pctrl, unsigned pin) +{ + struct intel_community *community; + const struct intel_padgroup *padgrp; + unsigned offset, gpp_offset; + u32 value; + + community = intel_get_community(pctrl, pin); + if (!community) + return true; + if (!community->padcfglock_offset) + return false; + + padgrp = intel_community_get_padgroup(community, pin); + if (!padgrp) + return true; + + gpp_offset = padgroup_offset(padgrp, pin); + + /* + * If PADCFGLOCK and PADCFGLOCKTX bits are both clear for this pad, + * the pad is considered unlocked. Any other case means that it is + * either fully or partially locked and we don't touch it. + */ + offset = community->padcfglock_offset + padgrp->reg_num * 8; + value = readl(community->regs + offset); + if (value & BIT(gpp_offset)) + return true; + + offset = community->padcfglock_offset + 4 + padgrp->reg_num * 8; + value = readl(community->regs + offset); + if (value & BIT(gpp_offset)) + return true; + + return false; +} + +static bool intel_pad_usable(struct intel_pinctrl *pctrl, unsigned pin) +{ + return intel_pad_owned_by_host(pctrl, pin) && + !intel_pad_locked(pctrl, pin); +} + +static int intel_get_groups_count(struct pinctrl_dev *pctldev) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + + return pctrl->soc->ngroups; +} + +static const char *intel_get_group_name(struct pinctrl_dev *pctldev, + unsigned group) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + + return pctrl->soc->groups[group].name; +} + +static int intel_get_group_pins(struct pinctrl_dev *pctldev, unsigned group, + const unsigned **pins, unsigned *npins) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + + *pins = pctrl->soc->groups[group].pins; + *npins = pctrl->soc->groups[group].npins; + return 0; +} + +static void intel_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, + unsigned pin) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + void __iomem *padcfg; + u32 cfg0, cfg1, mode; + bool locked, acpi; + + if (!intel_pad_owned_by_host(pctrl, pin)) { + seq_puts(s, "not available"); + return; + } + + cfg0 = readl(intel_get_padcfg(pctrl, pin, PADCFG0)); + cfg1 = readl(intel_get_padcfg(pctrl, pin, PADCFG1)); + + mode = (cfg0 & PADCFG0_PMODE_MASK) >> PADCFG0_PMODE_SHIFT; + if (mode == PADCFG0_PMODE_GPIO) + seq_puts(s, "GPIO "); + else + seq_printf(s, "mode %d ", mode); + + seq_printf(s, "0x%08x 0x%08x", cfg0, cfg1); + + /* Dump the additional PADCFG registers if available */ + padcfg = intel_get_padcfg(pctrl, pin, PADCFG2); + if (padcfg) + seq_printf(s, " 0x%08x", readl(padcfg)); + + locked = intel_pad_locked(pctrl, pin); + acpi = intel_pad_acpi_mode(pctrl, pin); + + if (locked || acpi) { + seq_puts(s, " ["); + if (locked) { + seq_puts(s, "LOCKED"); + if (acpi) + seq_puts(s, ", "); + } + if (acpi) + seq_puts(s, "ACPI"); + seq_puts(s, "]"); + } +} + +static const struct pinctrl_ops intel_pinctrl_ops = { + .get_groups_count = intel_get_groups_count, + .get_group_name = intel_get_group_name, + .get_group_pins = intel_get_group_pins, + .pin_dbg_show = intel_pin_dbg_show, +}; + +static int intel_get_functions_count(struct pinctrl_dev *pctldev) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + + return pctrl->soc->nfunctions; +} + +static const char *intel_get_function_name(struct pinctrl_dev *pctldev, + unsigned function) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + + return pctrl->soc->functions[function].name; +} + +static int intel_get_function_groups(struct pinctrl_dev *pctldev, + unsigned function, + const char * const **groups, + unsigned * const ngroups) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + + *groups = pctrl->soc->functions[function].groups; + *ngroups = pctrl->soc->functions[function].ngroups; + return 0; +} + +static int intel_pinmux_set_mux(struct pinctrl_dev *pctldev, unsigned function, + unsigned group) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + const struct intel_pingroup *grp = &pctrl->soc->groups[group]; + unsigned long flags; + int i; + + raw_spin_lock_irqsave(&pctrl->lock, flags); + + /* + * All pins in the groups needs to be accessible and writable + * before we can enable the mux for this group. + */ + for (i = 0; i < grp->npins; i++) { + if (!intel_pad_usable(pctrl, grp->pins[i])) { + raw_spin_unlock_irqrestore(&pctrl->lock, flags); + return -EBUSY; + } + } + + /* Now enable the mux setting for each pin in the group */ + for (i = 0; i < grp->npins; i++) { + void __iomem *padcfg0; + u32 value; + + padcfg0 = intel_get_padcfg(pctrl, grp->pins[i], PADCFG0); + value = readl(padcfg0); + + value &= ~PADCFG0_PMODE_MASK; + + if (grp->modes) + value |= grp->modes[i] << PADCFG0_PMODE_SHIFT; + else + value |= grp->mode << PADCFG0_PMODE_SHIFT; + + writel(value, padcfg0); + } + + raw_spin_unlock_irqrestore(&pctrl->lock, flags); + + return 0; +} + +static void __intel_gpio_set_direction(void __iomem *padcfg0, bool input) +{ + u32 value; + + value = readl(padcfg0); + if (input) { + value &= ~PADCFG0_GPIORXDIS; + value |= PADCFG0_GPIOTXDIS; + } else { + value &= ~PADCFG0_GPIOTXDIS; + value |= PADCFG0_GPIORXDIS; + } + writel(value, padcfg0); +} + +static int intel_gpio_get_gpio_mode(void __iomem *padcfg0) +{ + return (readl(padcfg0) & PADCFG0_PMODE_MASK) >> PADCFG0_PMODE_SHIFT; +} + +static void intel_gpio_set_gpio_mode(void __iomem *padcfg0) +{ + u32 value; + + /* Put the pad into GPIO mode */ + value = readl(padcfg0) & ~PADCFG0_PMODE_MASK; + /* Disable SCI/SMI/NMI generation */ + value &= ~(PADCFG0_GPIROUTIOXAPIC | PADCFG0_GPIROUTSCI); + value &= ~(PADCFG0_GPIROUTSMI | PADCFG0_GPIROUTNMI); + writel(value, padcfg0); +} + +static int intel_gpio_request_enable(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned pin) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + void __iomem *padcfg0; + unsigned long flags; + + raw_spin_lock_irqsave(&pctrl->lock, flags); + + if (!intel_pad_usable(pctrl, pin)) { + raw_spin_unlock_irqrestore(&pctrl->lock, flags); + return -EBUSY; + } + + padcfg0 = intel_get_padcfg(pctrl, pin, PADCFG0); + + /* + * If pin is already configured in GPIO mode, we assume that + * firmware provides correct settings. In such case we avoid + * potential glitches on the pin. Otherwise, for the pin in + * alternative mode, consumer has to supply respective flags. + */ + if (intel_gpio_get_gpio_mode(padcfg0) == PADCFG0_PMODE_GPIO) { + raw_spin_unlock_irqrestore(&pctrl->lock, flags); + return 0; + } + + intel_gpio_set_gpio_mode(padcfg0); + + /* Disable TX buffer and enable RX (this will be input) */ + __intel_gpio_set_direction(padcfg0, true); + + raw_spin_unlock_irqrestore(&pctrl->lock, flags); + + return 0; +} + +static int intel_gpio_set_direction(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned pin, bool input) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + void __iomem *padcfg0; + unsigned long flags; + + raw_spin_lock_irqsave(&pctrl->lock, flags); + + padcfg0 = intel_get_padcfg(pctrl, pin, PADCFG0); + __intel_gpio_set_direction(padcfg0, input); + + raw_spin_unlock_irqrestore(&pctrl->lock, flags); + + return 0; +} + +static const struct pinmux_ops intel_pinmux_ops = { + .get_functions_count = intel_get_functions_count, + .get_function_name = intel_get_function_name, + .get_function_groups = intel_get_function_groups, + .set_mux = intel_pinmux_set_mux, + .gpio_request_enable = intel_gpio_request_enable, + .gpio_set_direction = intel_gpio_set_direction, +}; + +static int intel_config_get(struct pinctrl_dev *pctldev, unsigned pin, + unsigned long *config) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + enum pin_config_param param = pinconf_to_config_param(*config); + const struct intel_community *community; + u32 value, term; + u32 arg = 0; + + if (!intel_pad_owned_by_host(pctrl, pin)) + return -ENOTSUPP; + + community = intel_get_community(pctrl, pin); + value = readl(intel_get_padcfg(pctrl, pin, PADCFG1)); + term = (value & PADCFG1_TERM_MASK) >> PADCFG1_TERM_SHIFT; + + switch (param) { + case PIN_CONFIG_BIAS_DISABLE: + if (term) + return -EINVAL; + break; + + case PIN_CONFIG_BIAS_PULL_UP: + if (!term || !(value & PADCFG1_TERM_UP)) + return -EINVAL; + + switch (term) { + case PADCFG1_TERM_1K: + arg = 1000; + break; + case PADCFG1_TERM_2K: + arg = 2000; + break; + case PADCFG1_TERM_5K: + arg = 5000; + break; + case PADCFG1_TERM_20K: + arg = 20000; + break; + } + + break; + + case PIN_CONFIG_BIAS_PULL_DOWN: + if (!term || value & PADCFG1_TERM_UP) + return -EINVAL; + + switch (term) { + case PADCFG1_TERM_1K: + if (!(community->features & PINCTRL_FEATURE_1K_PD)) + return -EINVAL; + arg = 1000; + break; + case PADCFG1_TERM_5K: + arg = 5000; + break; + case PADCFG1_TERM_20K: + arg = 20000; + break; + } + + break; + + case PIN_CONFIG_INPUT_DEBOUNCE: { + void __iomem *padcfg2; + u32 v; + + padcfg2 = intel_get_padcfg(pctrl, pin, PADCFG2); + if (!padcfg2) + return -ENOTSUPP; + + v = readl(padcfg2); + if (!(v & PADCFG2_DEBEN)) + return -EINVAL; + + v = (v & PADCFG2_DEBOUNCE_MASK) >> PADCFG2_DEBOUNCE_SHIFT; + arg = BIT(v) * DEBOUNCE_PERIOD / 1000; + + break; + } + + default: + return -ENOTSUPP; + } + + *config = pinconf_to_config_packed(param, arg); + return 0; +} + +static int intel_config_set_pull(struct intel_pinctrl *pctrl, unsigned pin, + unsigned long config) +{ + unsigned param = pinconf_to_config_param(config); + unsigned arg = pinconf_to_config_argument(config); + const struct intel_community *community; + void __iomem *padcfg1; + unsigned long flags; + int ret = 0; + u32 value; + + raw_spin_lock_irqsave(&pctrl->lock, flags); + + community = intel_get_community(pctrl, pin); + padcfg1 = intel_get_padcfg(pctrl, pin, PADCFG1); + value = readl(padcfg1); + + switch (param) { + case PIN_CONFIG_BIAS_DISABLE: + value &= ~(PADCFG1_TERM_MASK | PADCFG1_TERM_UP); + break; + + case PIN_CONFIG_BIAS_PULL_UP: + value &= ~PADCFG1_TERM_MASK; + + value |= PADCFG1_TERM_UP; + + /* Set default strength value in case none is given */ + if (arg == 1) + arg = 5000; + + switch (arg) { + case 20000: + value |= PADCFG1_TERM_20K << PADCFG1_TERM_SHIFT; + break; + case 5000: + value |= PADCFG1_TERM_5K << PADCFG1_TERM_SHIFT; + break; + case 2000: + value |= PADCFG1_TERM_2K << PADCFG1_TERM_SHIFT; + break; + case 1000: + value |= PADCFG1_TERM_1K << PADCFG1_TERM_SHIFT; + break; + default: + ret = -EINVAL; + } + + break; + + case PIN_CONFIG_BIAS_PULL_DOWN: + value &= ~(PADCFG1_TERM_UP | PADCFG1_TERM_MASK); + + /* Set default strength value in case none is given */ + if (arg == 1) + arg = 5000; + + switch (arg) { + case 20000: + value |= PADCFG1_TERM_20K << PADCFG1_TERM_SHIFT; + break; + case 5000: + value |= PADCFG1_TERM_5K << PADCFG1_TERM_SHIFT; + break; + case 1000: + if (!(community->features & PINCTRL_FEATURE_1K_PD)) { + ret = -EINVAL; + break; + } + value |= PADCFG1_TERM_1K << PADCFG1_TERM_SHIFT; + break; + default: + ret = -EINVAL; + } + + break; + } + + if (!ret) + writel(value, padcfg1); + + raw_spin_unlock_irqrestore(&pctrl->lock, flags); + + return ret; +} + +static int intel_config_set_debounce(struct intel_pinctrl *pctrl, unsigned pin, + unsigned debounce) +{ + void __iomem *padcfg0, *padcfg2; + unsigned long flags; + u32 value0, value2; + int ret = 0; + + padcfg2 = intel_get_padcfg(pctrl, pin, PADCFG2); + if (!padcfg2) + return -ENOTSUPP; + + padcfg0 = intel_get_padcfg(pctrl, pin, PADCFG0); + + raw_spin_lock_irqsave(&pctrl->lock, flags); + + value0 = readl(padcfg0); + value2 = readl(padcfg2); + + /* Disable glitch filter and debouncer */ + value0 &= ~PADCFG0_PREGFRXSEL; + value2 &= ~(PADCFG2_DEBEN | PADCFG2_DEBOUNCE_MASK); + + if (debounce) { + unsigned long v; + + v = order_base_2(debounce * 1000 / DEBOUNCE_PERIOD); + if (v < 3 || v > 15) { + ret = -EINVAL; + goto exit_unlock; + } else { + /* Enable glitch filter and debouncer */ + value0 |= PADCFG0_PREGFRXSEL; + value2 |= v << PADCFG2_DEBOUNCE_SHIFT; + value2 |= PADCFG2_DEBEN; + } + } + + writel(value0, padcfg0); + writel(value2, padcfg2); + +exit_unlock: + raw_spin_unlock_irqrestore(&pctrl->lock, flags); + + return ret; +} + +static int intel_config_set(struct pinctrl_dev *pctldev, unsigned pin, + unsigned long *configs, unsigned nconfigs) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + int i, ret; + + if (!intel_pad_usable(pctrl, pin)) + return -ENOTSUPP; + + for (i = 0; i < nconfigs; i++) { + switch (pinconf_to_config_param(configs[i])) { + case PIN_CONFIG_BIAS_DISABLE: + case PIN_CONFIG_BIAS_PULL_UP: + case PIN_CONFIG_BIAS_PULL_DOWN: + ret = intel_config_set_pull(pctrl, pin, configs[i]); + if (ret) + return ret; + break; + + case PIN_CONFIG_INPUT_DEBOUNCE: + ret = intel_config_set_debounce(pctrl, pin, + pinconf_to_config_argument(configs[i])); + if (ret) + return ret; + break; + + default: + return -ENOTSUPP; + } + } + + return 0; +} + +static const struct pinconf_ops intel_pinconf_ops = { + .is_generic = true, + .pin_config_get = intel_config_get, + .pin_config_set = intel_config_set, +}; + +static const struct pinctrl_desc intel_pinctrl_desc = { + .pctlops = &intel_pinctrl_ops, + .pmxops = &intel_pinmux_ops, + .confops = &intel_pinconf_ops, + .owner = THIS_MODULE, +}; + +/** + * intel_gpio_to_pin() - Translate from GPIO offset to pin number + * @pctrl: Pinctrl structure + * @offset: GPIO offset from gpiolib + * @commmunity: Community is filled here if not %NULL + * @padgrp: Pad group is filled here if not %NULL + * + * When coming through gpiolib irqchip, the GPIO offset is not + * automatically translated to pinctrl pin number. This function can be + * used to find out the corresponding pinctrl pin. + */ +static int intel_gpio_to_pin(struct intel_pinctrl *pctrl, unsigned offset, + const struct intel_community **community, + const struct intel_padgroup **padgrp) +{ + int i; + + for (i = 0; i < pctrl->ncommunities; i++) { + const struct intel_community *comm = &pctrl->communities[i]; + int j; + + for (j = 0; j < comm->ngpps; j++) { + const struct intel_padgroup *pgrp = &comm->gpps[j]; + + if (pgrp->gpio_base < 0) + continue; + + if (offset >= pgrp->gpio_base && + offset < pgrp->gpio_base + pgrp->size) { + int pin; + + pin = pgrp->base + offset - pgrp->gpio_base; + if (community) + *community = comm; + if (padgrp) + *padgrp = pgrp; + + return pin; + } + } + } + + return -EINVAL; +} + +static int intel_gpio_get(struct gpio_chip *chip, unsigned offset) +{ + struct intel_pinctrl *pctrl = gpiochip_get_data(chip); + void __iomem *reg; + u32 padcfg0; + int pin; + + pin = intel_gpio_to_pin(pctrl, offset, NULL, NULL); + if (pin < 0) + return -EINVAL; + + reg = intel_get_padcfg(pctrl, pin, PADCFG0); + if (!reg) + return -EINVAL; + + padcfg0 = readl(reg); + if (!(padcfg0 & PADCFG0_GPIOTXDIS)) + return !!(padcfg0 & PADCFG0_GPIOTXSTATE); + + return !!(padcfg0 & PADCFG0_GPIORXSTATE); +} + +static void intel_gpio_set(struct gpio_chip *chip, unsigned offset, int value) +{ + struct intel_pinctrl *pctrl = gpiochip_get_data(chip); + unsigned long flags; + void __iomem *reg; + u32 padcfg0; + int pin; + + pin = intel_gpio_to_pin(pctrl, offset, NULL, NULL); + if (pin < 0) + return; + + reg = intel_get_padcfg(pctrl, pin, PADCFG0); + if (!reg) + return; + + raw_spin_lock_irqsave(&pctrl->lock, flags); + padcfg0 = readl(reg); + if (value) + padcfg0 |= PADCFG0_GPIOTXSTATE; + else + padcfg0 &= ~PADCFG0_GPIOTXSTATE; + writel(padcfg0, reg); + raw_spin_unlock_irqrestore(&pctrl->lock, flags); +} + +static int intel_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) +{ + struct intel_pinctrl *pctrl = gpiochip_get_data(chip); + void __iomem *reg; + u32 padcfg0; + int pin; + + pin = intel_gpio_to_pin(pctrl, offset, NULL, NULL); + if (pin < 0) + return -EINVAL; + + reg = intel_get_padcfg(pctrl, pin, PADCFG0); + if (!reg) + return -EINVAL; + + padcfg0 = readl(reg); + + if (padcfg0 & PADCFG0_PMODE_MASK) + return -EINVAL; + + return !!(padcfg0 & PADCFG0_GPIOTXDIS); +} + +static int intel_gpio_direction_input(struct gpio_chip *chip, unsigned offset) +{ + return pinctrl_gpio_direction_input(chip->base + offset); +} + +static int intel_gpio_direction_output(struct gpio_chip *chip, unsigned offset, + int value) +{ + intel_gpio_set(chip, offset, value); + return pinctrl_gpio_direction_output(chip->base + offset); +} + +static const struct gpio_chip intel_gpio_chip = { + .owner = THIS_MODULE, + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, + .get_direction = intel_gpio_get_direction, + .direction_input = intel_gpio_direction_input, + .direction_output = intel_gpio_direction_output, + .get = intel_gpio_get, + .set = intel_gpio_set, + .set_config = gpiochip_generic_config, +}; + +static void intel_gpio_irq_ack(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct intel_pinctrl *pctrl = gpiochip_get_data(gc); + const struct intel_community *community; + const struct intel_padgroup *padgrp; + int pin; + + pin = intel_gpio_to_pin(pctrl, irqd_to_hwirq(d), &community, &padgrp); + if (pin >= 0) { + unsigned gpp, gpp_offset, is_offset; + + gpp = padgrp->reg_num; + gpp_offset = padgroup_offset(padgrp, pin); + is_offset = community->is_offset + gpp * 4; + + raw_spin_lock(&pctrl->lock); + writel(BIT(gpp_offset), community->regs + is_offset); + raw_spin_unlock(&pctrl->lock); + } +} + +static void intel_gpio_irq_enable(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct intel_pinctrl *pctrl = gpiochip_get_data(gc); + const struct intel_community *community; + const struct intel_padgroup *padgrp; + int pin; + + pin = intel_gpio_to_pin(pctrl, irqd_to_hwirq(d), &community, &padgrp); + if (pin >= 0) { + unsigned gpp, gpp_offset, is_offset; + unsigned long flags; + u32 value; + + gpp = padgrp->reg_num; + gpp_offset = padgroup_offset(padgrp, pin); + is_offset = community->is_offset + gpp * 4; + + raw_spin_lock_irqsave(&pctrl->lock, flags); + /* Clear interrupt status first to avoid unexpected interrupt */ + writel(BIT(gpp_offset), community->regs + is_offset); + + value = readl(community->regs + community->ie_offset + gpp * 4); + value |= BIT(gpp_offset); + writel(value, community->regs + community->ie_offset + gpp * 4); + raw_spin_unlock_irqrestore(&pctrl->lock, flags); + } +} + +static void intel_gpio_irq_mask_unmask(struct irq_data *d, bool mask) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct intel_pinctrl *pctrl = gpiochip_get_data(gc); + const struct intel_community *community; + const struct intel_padgroup *padgrp; + int pin; + + pin = intel_gpio_to_pin(pctrl, irqd_to_hwirq(d), &community, &padgrp); + if (pin >= 0) { + unsigned gpp, gpp_offset; + unsigned long flags; + void __iomem *reg; + u32 value; + + gpp = padgrp->reg_num; + gpp_offset = padgroup_offset(padgrp, pin); + + reg = community->regs + community->ie_offset + gpp * 4; + + raw_spin_lock_irqsave(&pctrl->lock, flags); + value = readl(reg); + if (mask) + value &= ~BIT(gpp_offset); + else + value |= BIT(gpp_offset); + writel(value, reg); + raw_spin_unlock_irqrestore(&pctrl->lock, flags); + } +} + +static void intel_gpio_irq_mask(struct irq_data *d) +{ + intel_gpio_irq_mask_unmask(d, true); +} + +static void intel_gpio_irq_unmask(struct irq_data *d) +{ + intel_gpio_irq_mask_unmask(d, false); +} + +static int intel_gpio_irq_type(struct irq_data *d, unsigned type) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct intel_pinctrl *pctrl = gpiochip_get_data(gc); + unsigned pin = intel_gpio_to_pin(pctrl, irqd_to_hwirq(d), NULL, NULL); + unsigned long flags; + void __iomem *reg; + u32 value; + + reg = intel_get_padcfg(pctrl, pin, PADCFG0); + if (!reg) + return -EINVAL; + + /* + * If the pin is in ACPI mode it is still usable as a GPIO but it + * cannot be used as IRQ because GPI_IS status bit will not be + * updated by the host controller hardware. + */ + if (intel_pad_acpi_mode(pctrl, pin)) { + dev_warn(pctrl->dev, "pin %u cannot be used as IRQ\n", pin); + return -EPERM; + } + + raw_spin_lock_irqsave(&pctrl->lock, flags); + + intel_gpio_set_gpio_mode(reg); + + value = readl(reg); + + value &= ~(PADCFG0_RXEVCFG_MASK | PADCFG0_RXINV); + + if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) { + value |= PADCFG0_RXEVCFG_EDGE_BOTH << PADCFG0_RXEVCFG_SHIFT; + } else if (type & IRQ_TYPE_EDGE_FALLING) { + value |= PADCFG0_RXEVCFG_EDGE << PADCFG0_RXEVCFG_SHIFT; + value |= PADCFG0_RXINV; + } else if (type & IRQ_TYPE_EDGE_RISING) { + value |= PADCFG0_RXEVCFG_EDGE << PADCFG0_RXEVCFG_SHIFT; + } else if (type & IRQ_TYPE_LEVEL_MASK) { + if (type & IRQ_TYPE_LEVEL_LOW) + value |= PADCFG0_RXINV; + } else { + value |= PADCFG0_RXEVCFG_DISABLED << PADCFG0_RXEVCFG_SHIFT; + } + + writel(value, reg); + + if (type & IRQ_TYPE_EDGE_BOTH) + irq_set_handler_locked(d, handle_edge_irq); + else if (type & IRQ_TYPE_LEVEL_MASK) + irq_set_handler_locked(d, handle_level_irq); + + raw_spin_unlock_irqrestore(&pctrl->lock, flags); + + return 0; +} + +static int intel_gpio_irq_wake(struct irq_data *d, unsigned int on) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct intel_pinctrl *pctrl = gpiochip_get_data(gc); + unsigned pin = intel_gpio_to_pin(pctrl, irqd_to_hwirq(d), NULL, NULL); + + if (on) + enable_irq_wake(pctrl->irq); + else + disable_irq_wake(pctrl->irq); + + dev_dbg(pctrl->dev, "%sable wake for pin %u\n", on ? "en" : "dis", pin); + return 0; +} + +static irqreturn_t intel_gpio_community_irq_handler(struct intel_pinctrl *pctrl, + const struct intel_community *community) +{ + struct gpio_chip *gc = &pctrl->chip; + irqreturn_t ret = IRQ_NONE; + int gpp; + + for (gpp = 0; gpp < community->ngpps; gpp++) { + const struct intel_padgroup *padgrp = &community->gpps[gpp]; + unsigned long pending, enabled, gpp_offset; + + pending = readl(community->regs + community->is_offset + + padgrp->reg_num * 4); + enabled = readl(community->regs + community->ie_offset + + padgrp->reg_num * 4); + + /* Only interrupts that are enabled */ + pending &= enabled; + + for_each_set_bit(gpp_offset, &pending, padgrp->size) { + unsigned irq; + + irq = irq_find_mapping(gc->irq.domain, + padgrp->gpio_base + gpp_offset); + generic_handle_irq(irq); + + ret |= IRQ_HANDLED; + } + } + + return ret; +} + +static irqreturn_t intel_gpio_irq(int irq, void *data) +{ + const struct intel_community *community; + struct intel_pinctrl *pctrl = data; + irqreturn_t ret = IRQ_NONE; + int i; + + /* Need to check all communities for pending interrupts */ + for (i = 0; i < pctrl->ncommunities; i++) { + community = &pctrl->communities[i]; + ret |= intel_gpio_community_irq_handler(pctrl, community); + } + + return ret; +} + +static struct irq_chip intel_gpio_irqchip = { + .name = "intel-gpio", + .irq_enable = intel_gpio_irq_enable, + .irq_ack = intel_gpio_irq_ack, + .irq_mask = intel_gpio_irq_mask, + .irq_unmask = intel_gpio_irq_unmask, + .irq_set_type = intel_gpio_irq_type, + .irq_set_wake = intel_gpio_irq_wake, + .flags = IRQCHIP_MASK_ON_SUSPEND, +}; + +static int intel_gpio_add_pin_ranges(struct intel_pinctrl *pctrl, + const struct intel_community *community) +{ + int ret = 0, i; + + for (i = 0; i < community->ngpps; i++) { + const struct intel_padgroup *gpp = &community->gpps[i]; + + if (gpp->gpio_base < 0) + continue; + + ret = gpiochip_add_pin_range(&pctrl->chip, dev_name(pctrl->dev), + gpp->gpio_base, gpp->base, + gpp->size); + if (ret) + return ret; + } + + return ret; +} + +static unsigned intel_gpio_ngpio(const struct intel_pinctrl *pctrl) +{ + const struct intel_community *community; + unsigned ngpio = 0; + int i, j; + + for (i = 0; i < pctrl->ncommunities; i++) { + community = &pctrl->communities[i]; + for (j = 0; j < community->ngpps; j++) { + const struct intel_padgroup *gpp = &community->gpps[j]; + + if (gpp->gpio_base < 0) + continue; + + if (gpp->gpio_base + gpp->size > ngpio) + ngpio = gpp->gpio_base + gpp->size; + } + } + + return ngpio; +} + +static int intel_gpio_probe(struct intel_pinctrl *pctrl, int irq) +{ + int ret, i; + + pctrl->chip = intel_gpio_chip; + + pctrl->chip.ngpio = intel_gpio_ngpio(pctrl); + pctrl->chip.label = dev_name(pctrl->dev); + pctrl->chip.parent = pctrl->dev; + pctrl->chip.base = -1; + pctrl->irq = irq; + + ret = devm_gpiochip_add_data(pctrl->dev, &pctrl->chip, pctrl); + if (ret) { + dev_err(pctrl->dev, "failed to register gpiochip\n"); + return ret; + } + + for (i = 0; i < pctrl->ncommunities; i++) { + struct intel_community *community = &pctrl->communities[i]; + + ret = intel_gpio_add_pin_ranges(pctrl, community); + if (ret) { + dev_err(pctrl->dev, "failed to add GPIO pin range\n"); + return ret; + } + } + + /* + * We need to request the interrupt here (instead of providing chip + * to the irq directly) because on some platforms several GPIO + * controllers share the same interrupt line. + */ + ret = devm_request_irq(pctrl->dev, irq, intel_gpio_irq, + IRQF_SHARED | IRQF_NO_THREAD, + dev_name(pctrl->dev), pctrl); + if (ret) { + dev_err(pctrl->dev, "failed to request interrupt\n"); + return ret; + } + + ret = gpiochip_irqchip_add(&pctrl->chip, &intel_gpio_irqchip, 0, + handle_bad_irq, IRQ_TYPE_NONE); + if (ret) { + dev_err(pctrl->dev, "failed to add irqchip\n"); + return ret; + } + + gpiochip_set_chained_irqchip(&pctrl->chip, &intel_gpio_irqchip, irq, + NULL); + return 0; +} + +static int intel_pinctrl_add_padgroups(struct intel_pinctrl *pctrl, + struct intel_community *community) +{ + struct intel_padgroup *gpps; + unsigned npins = community->npins; + unsigned padown_num = 0; + size_t ngpps, i; + + if (community->gpps) + ngpps = community->ngpps; + else + ngpps = DIV_ROUND_UP(community->npins, community->gpp_size); + + gpps = devm_kcalloc(pctrl->dev, ngpps, sizeof(*gpps), GFP_KERNEL); + if (!gpps) + return -ENOMEM; + + for (i = 0; i < ngpps; i++) { + if (community->gpps) { + gpps[i] = community->gpps[i]; + } else { + unsigned gpp_size = community->gpp_size; + + gpps[i].reg_num = i; + gpps[i].base = community->pin_base + i * gpp_size; + gpps[i].size = min(gpp_size, npins); + npins -= gpps[i].size; + } + + if (gpps[i].size > 32) + return -EINVAL; + + if (!gpps[i].gpio_base) + gpps[i].gpio_base = gpps[i].base; + + gpps[i].padown_num = padown_num; + + /* + * In older hardware the number of padown registers per + * group is fixed regardless of the group size. + */ + if (community->gpp_num_padown_regs) + padown_num += community->gpp_num_padown_regs; + else + padown_num += DIV_ROUND_UP(gpps[i].size * 4, 32); + } + + community->ngpps = ngpps; + community->gpps = gpps; + + return 0; +} + +static int intel_pinctrl_pm_init(struct intel_pinctrl *pctrl) +{ +#ifdef CONFIG_PM_SLEEP + const struct intel_pinctrl_soc_data *soc = pctrl->soc; + struct intel_community_context *communities; + struct intel_pad_context *pads; + int i; + + pads = devm_kcalloc(pctrl->dev, soc->npins, sizeof(*pads), GFP_KERNEL); + if (!pads) + return -ENOMEM; + + communities = devm_kcalloc(pctrl->dev, pctrl->ncommunities, + sizeof(*communities), GFP_KERNEL); + if (!communities) + return -ENOMEM; + + + for (i = 0; i < pctrl->ncommunities; i++) { + struct intel_community *community = &pctrl->communities[i]; + u32 *intmask; + + intmask = devm_kcalloc(pctrl->dev, community->ngpps, + sizeof(*intmask), GFP_KERNEL); + if (!intmask) + return -ENOMEM; + + communities[i].intmask = intmask; + } + + pctrl->context.pads = pads; + pctrl->context.communities = communities; +#endif + + return 0; +} + +int intel_pinctrl_probe(struct platform_device *pdev, + const struct intel_pinctrl_soc_data *soc_data) +{ + struct intel_pinctrl *pctrl; + int i, ret, irq; + + if (!soc_data) + return -EINVAL; + + pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL); + if (!pctrl) + return -ENOMEM; + + pctrl->dev = &pdev->dev; + pctrl->soc = soc_data; + raw_spin_lock_init(&pctrl->lock); + + /* + * Make a copy of the communities which we can use to hold pointers + * to the registers. + */ + pctrl->ncommunities = pctrl->soc->ncommunities; + pctrl->communities = devm_kcalloc(&pdev->dev, pctrl->ncommunities, + sizeof(*pctrl->communities), GFP_KERNEL); + if (!pctrl->communities) + return -ENOMEM; + + for (i = 0; i < pctrl->ncommunities; i++) { + struct intel_community *community = &pctrl->communities[i]; + struct resource *res; + void __iomem *regs; + u32 padbar; + + *community = pctrl->soc->communities[i]; + + res = platform_get_resource(pdev, IORESOURCE_MEM, + community->barno); + regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(regs)) + return PTR_ERR(regs); + + /* + * Determine community features based on the revision if + * not specified already. + */ + if (!community->features) { + u32 rev; + + rev = (readl(regs + REVID) & REVID_MASK) >> REVID_SHIFT; + if (rev >= 0x94) { + community->features |= PINCTRL_FEATURE_DEBOUNCE; + community->features |= PINCTRL_FEATURE_1K_PD; + } + } + + /* Read offset of the pad configuration registers */ + padbar = readl(regs + PADBAR); + + community->regs = regs; + community->pad_regs = regs + padbar; + + if (!community->is_offset) + community->is_offset = GPI_IS; + + ret = intel_pinctrl_add_padgroups(pctrl, community); + if (ret) + return ret; + } + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "failed to get interrupt number\n"); + return irq; + } + + ret = intel_pinctrl_pm_init(pctrl); + if (ret) + return ret; + + pctrl->pctldesc = intel_pinctrl_desc; + pctrl->pctldesc.name = dev_name(&pdev->dev); + pctrl->pctldesc.pins = pctrl->soc->pins; + pctrl->pctldesc.npins = pctrl->soc->npins; + + pctrl->pctldev = devm_pinctrl_register(&pdev->dev, &pctrl->pctldesc, + pctrl); + if (IS_ERR(pctrl->pctldev)) { + dev_err(&pdev->dev, "failed to register pinctrl driver\n"); + return PTR_ERR(pctrl->pctldev); + } + + ret = intel_gpio_probe(pctrl, irq); + if (ret) + return ret; + + platform_set_drvdata(pdev, pctrl); + + return 0; +} +EXPORT_SYMBOL_GPL(intel_pinctrl_probe); + +#ifdef CONFIG_PM_SLEEP +static bool intel_pinctrl_should_save(struct intel_pinctrl *pctrl, unsigned pin) +{ + const struct pin_desc *pd = pin_desc_get(pctrl->pctldev, pin); + + if (!pd || !intel_pad_usable(pctrl, pin)) + return false; + + /* + * Only restore the pin if it is actually in use by the kernel (or + * by userspace). It is possible that some pins are used by the + * BIOS during resume and those are not always locked down so leave + * them alone. + */ + if (pd->mux_owner || pd->gpio_owner || + gpiochip_line_is_irq(&pctrl->chip, pin)) + return true; + + return false; +} + +int intel_pinctrl_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct intel_pinctrl *pctrl = platform_get_drvdata(pdev); + struct intel_community_context *communities; + struct intel_pad_context *pads; + int i; + + pads = pctrl->context.pads; + for (i = 0; i < pctrl->soc->npins; i++) { + const struct pinctrl_pin_desc *desc = &pctrl->soc->pins[i]; + void __iomem *padcfg; + u32 val; + + if (!intel_pinctrl_should_save(pctrl, desc->number)) + continue; + + val = readl(intel_get_padcfg(pctrl, desc->number, PADCFG0)); + pads[i].padcfg0 = val & ~PADCFG0_GPIORXSTATE; + val = readl(intel_get_padcfg(pctrl, desc->number, PADCFG1)); + pads[i].padcfg1 = val; + + padcfg = intel_get_padcfg(pctrl, desc->number, PADCFG2); + if (padcfg) + pads[i].padcfg2 = readl(padcfg); + } + + communities = pctrl->context.communities; + for (i = 0; i < pctrl->ncommunities; i++) { + struct intel_community *community = &pctrl->communities[i]; + void __iomem *base; + unsigned gpp; + + base = community->regs + community->ie_offset; + for (gpp = 0; gpp < community->ngpps; gpp++) + communities[i].intmask[gpp] = readl(base + gpp * 4); + } + + return 0; +} +EXPORT_SYMBOL_GPL(intel_pinctrl_suspend); + +static void intel_gpio_irq_init(struct intel_pinctrl *pctrl) +{ + size_t i; + + for (i = 0; i < pctrl->ncommunities; i++) { + const struct intel_community *community; + void __iomem *base; + unsigned gpp; + + community = &pctrl->communities[i]; + base = community->regs; + + for (gpp = 0; gpp < community->ngpps; gpp++) { + /* Mask and clear all interrupts */ + writel(0, base + community->ie_offset + gpp * 4); + writel(0xffff, base + community->is_offset + gpp * 4); + } + } +} + +int intel_pinctrl_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct intel_pinctrl *pctrl = platform_get_drvdata(pdev); + const struct intel_community_context *communities; + const struct intel_pad_context *pads; + int i; + + /* Mask all interrupts */ + intel_gpio_irq_init(pctrl); + + pads = pctrl->context.pads; + for (i = 0; i < pctrl->soc->npins; i++) { + const struct pinctrl_pin_desc *desc = &pctrl->soc->pins[i]; + void __iomem *padcfg; + u32 val; + + if (!intel_pinctrl_should_save(pctrl, desc->number)) + continue; + + padcfg = intel_get_padcfg(pctrl, desc->number, PADCFG0); + val = readl(padcfg) & ~PADCFG0_GPIORXSTATE; + if (val != pads[i].padcfg0) { + writel(pads[i].padcfg0, padcfg); + dev_dbg(dev, "restored pin %u padcfg0 %#08x\n", + desc->number, readl(padcfg)); + } + + padcfg = intel_get_padcfg(pctrl, desc->number, PADCFG1); + val = readl(padcfg); + if (val != pads[i].padcfg1) { + writel(pads[i].padcfg1, padcfg); + dev_dbg(dev, "restored pin %u padcfg1 %#08x\n", + desc->number, readl(padcfg)); + } + + padcfg = intel_get_padcfg(pctrl, desc->number, PADCFG2); + if (padcfg) { + val = readl(padcfg); + if (val != pads[i].padcfg2) { + writel(pads[i].padcfg2, padcfg); + dev_dbg(dev, "restored pin %u padcfg2 %#08x\n", + desc->number, readl(padcfg)); + } + } + } + + communities = pctrl->context.communities; + for (i = 0; i < pctrl->ncommunities; i++) { + struct intel_community *community = &pctrl->communities[i]; + void __iomem *base; + unsigned gpp; + + base = community->regs + community->ie_offset; + for (gpp = 0; gpp < community->ngpps; gpp++) { + writel(communities[i].intmask[gpp], base + gpp * 4); + dev_dbg(dev, "restored mask %d/%u %#08x\n", i, gpp, + readl(base + gpp * 4)); + } + } + + return 0; +} +EXPORT_SYMBOL_GPL(intel_pinctrl_resume); +#endif + +MODULE_AUTHOR("Mathias Nyman <mathias.nyman@linux.intel.com>"); +MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>"); +MODULE_DESCRIPTION("Intel pinctrl/GPIO core driver"); +MODULE_LICENSE("GPL v2"); |