diff options
Diffstat (limited to 'drivers/pinctrl/qcom/pinctrl-msm.c')
| -rw-r--r-- | drivers/pinctrl/qcom/pinctrl-msm.c | 1528 |
1 files changed, 1528 insertions, 0 deletions
diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c new file mode 100644 index 000000000..8bf8b2195 --- /dev/null +++ b/drivers/pinctrl/qcom/pinctrl-msm.c @@ -0,0 +1,1528 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2013, Sony Mobile Communications AB. + * Copyright (c) 2013, The Linux Foundation. All rights reserved. + */ + +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/pinctrl/machine.h> +#include <linux/pinctrl/pinctrl.h> +#include <linux/pinctrl/pinmux.h> +#include <linux/pinctrl/pinconf.h> +#include <linux/pinctrl/pinconf-generic.h> +#include <linux/slab.h> +#include <linux/gpio/driver.h> +#include <linux/interrupt.h> +#include <linux/spinlock.h> +#include <linux/reboot.h> +#include <linux/pm.h> +#include <linux/log2.h> +#include <linux/qcom_scm.h> + +#include <linux/soc/qcom/irq.h> + +#include "../core.h" +#include "../pinconf.h" +#include "pinctrl-msm.h" +#include "../pinctrl-utils.h" + +#define MAX_NR_GPIO 300 +#define MAX_NR_TILES 4 +#define PS_HOLD_OFFSET 0x820 + +/** + * struct msm_pinctrl - state for a pinctrl-msm device + * @dev: device handle. + * @pctrl: pinctrl handle. + * @chip: gpiochip handle. + * @desc: pin controller descriptor + * @restart_nb: restart notifier block. + * @irq: parent irq for the TLMM irq_chip. + * @intr_target_use_scm: route irq to application cpu using scm calls + * @lock: Spinlock to protect register resources as well + * as msm_pinctrl data structures. + * @enabled_irqs: Bitmap of currently enabled irqs. + * @dual_edge_irqs: Bitmap of irqs that need sw emulated dual edge + * detection. + * @skip_wake_irqs: Skip IRQs that are handled by wakeup interrupt controller + * @disabled_for_mux: These IRQs were disabled because we muxed away. + * @ever_gpio: This bit is set the first time we mux a pin to gpio_func. + * @soc: Reference to soc_data of platform specific data. + * @regs: Base addresses for the TLMM tiles. + * @phys_base: Physical base address + */ +struct msm_pinctrl { + struct device *dev; + struct pinctrl_dev *pctrl; + struct gpio_chip chip; + struct pinctrl_desc desc; + struct notifier_block restart_nb; + + int irq; + + bool intr_target_use_scm; + + raw_spinlock_t lock; + + DECLARE_BITMAP(dual_edge_irqs, MAX_NR_GPIO); + DECLARE_BITMAP(enabled_irqs, MAX_NR_GPIO); + DECLARE_BITMAP(skip_wake_irqs, MAX_NR_GPIO); + DECLARE_BITMAP(disabled_for_mux, MAX_NR_GPIO); + DECLARE_BITMAP(ever_gpio, MAX_NR_GPIO); + + const struct msm_pinctrl_soc_data *soc; + void __iomem *regs[MAX_NR_TILES]; + u32 phys_base[MAX_NR_TILES]; +}; + +#define MSM_ACCESSOR(name) \ +static u32 msm_readl_##name(struct msm_pinctrl *pctrl, \ + const struct msm_pingroup *g) \ +{ \ + return readl(pctrl->regs[g->tile] + g->name##_reg); \ +} \ +static void msm_writel_##name(u32 val, struct msm_pinctrl *pctrl, \ + const struct msm_pingroup *g) \ +{ \ + writel(val, pctrl->regs[g->tile] + g->name##_reg); \ +} + +MSM_ACCESSOR(ctl) +MSM_ACCESSOR(io) +MSM_ACCESSOR(intr_cfg) +MSM_ACCESSOR(intr_status) +MSM_ACCESSOR(intr_target) + +static void msm_ack_intr_status(struct msm_pinctrl *pctrl, + const struct msm_pingroup *g) +{ + u32 val = g->intr_ack_high ? BIT(g->intr_status_bit) : 0; + + msm_writel_intr_status(val, pctrl, g); +} + +static int msm_get_groups_count(struct pinctrl_dev *pctldev) +{ + struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + + return pctrl->soc->ngroups; +} + +static const char *msm_get_group_name(struct pinctrl_dev *pctldev, + unsigned group) +{ + struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + + return pctrl->soc->groups[group].name; +} + +static int msm_get_group_pins(struct pinctrl_dev *pctldev, + unsigned group, + const unsigned **pins, + unsigned *num_pins) +{ + struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + + *pins = pctrl->soc->groups[group].pins; + *num_pins = pctrl->soc->groups[group].npins; + return 0; +} + +static const struct pinctrl_ops msm_pinctrl_ops = { + .get_groups_count = msm_get_groups_count, + .get_group_name = msm_get_group_name, + .get_group_pins = msm_get_group_pins, + .dt_node_to_map = pinconf_generic_dt_node_to_map_group, + .dt_free_map = pinctrl_utils_free_map, +}; + +static int msm_pinmux_request(struct pinctrl_dev *pctldev, unsigned offset) +{ + struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + struct gpio_chip *chip = &pctrl->chip; + + return gpiochip_line_is_valid(chip, offset) ? 0 : -EINVAL; +} + +static int msm_get_functions_count(struct pinctrl_dev *pctldev) +{ + struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + + return pctrl->soc->nfunctions; +} + +static const char *msm_get_function_name(struct pinctrl_dev *pctldev, + unsigned function) +{ + struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + + return pctrl->soc->functions[function].name; +} + +static int msm_get_function_groups(struct pinctrl_dev *pctldev, + unsigned function, + const char * const **groups, + unsigned * const num_groups) +{ + struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + + *groups = pctrl->soc->functions[function].groups; + *num_groups = pctrl->soc->functions[function].ngroups; + return 0; +} + +static int msm_pinmux_set_mux(struct pinctrl_dev *pctldev, + unsigned function, + unsigned group) +{ + struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + struct gpio_chip *gc = &pctrl->chip; + unsigned int irq = irq_find_mapping(gc->irq.domain, group); + struct irq_data *d = irq_get_irq_data(irq); + unsigned int gpio_func = pctrl->soc->gpio_func; + unsigned int egpio_func = pctrl->soc->egpio_func; + const struct msm_pingroup *g; + unsigned long flags; + u32 val, mask; + int i; + + g = &pctrl->soc->groups[group]; + mask = GENMASK(g->mux_bit + order_base_2(g->nfuncs) - 1, g->mux_bit); + + for (i = 0; i < g->nfuncs; i++) { + if (g->funcs[i] == function) + break; + } + + if (WARN_ON(i == g->nfuncs)) + return -EINVAL; + + /* + * If an GPIO interrupt is setup on this pin then we need special + * handling. Specifically interrupt detection logic will still see + * the pin twiddle even when we're muxed away. + * + * When we see a pin with an interrupt setup on it then we'll disable + * (mask) interrupts on it when we mux away until we mux back. Note + * that disable_irq() refcounts and interrupts are disabled as long as + * at least one disable_irq() has been called. + */ + if (d && i != gpio_func && + !test_and_set_bit(d->hwirq, pctrl->disabled_for_mux)) + disable_irq(irq); + + raw_spin_lock_irqsave(&pctrl->lock, flags); + + val = msm_readl_ctl(pctrl, g); + + /* + * If this is the first time muxing to GPIO and the direction is + * output, make sure that we're not going to be glitching the pin + * by reading the current state of the pin and setting it as the + * output. + */ + if (i == gpio_func && (val & BIT(g->oe_bit)) && + !test_and_set_bit(group, pctrl->ever_gpio)) { + u32 io_val = msm_readl_io(pctrl, g); + + if (io_val & BIT(g->in_bit)) { + if (!(io_val & BIT(g->out_bit))) + msm_writel_io(io_val | BIT(g->out_bit), pctrl, g); + } else { + if (io_val & BIT(g->out_bit)) + msm_writel_io(io_val & ~BIT(g->out_bit), pctrl, g); + } + } + + if (egpio_func && i == egpio_func) { + if (val & BIT(g->egpio_present)) + val &= ~BIT(g->egpio_enable); + } else { + val &= ~mask; + val |= i << g->mux_bit; + /* Claim ownership of pin if egpio capable */ + if (egpio_func && val & BIT(g->egpio_present)) + val |= BIT(g->egpio_enable); + } + + msm_writel_ctl(val, pctrl, g); + + raw_spin_unlock_irqrestore(&pctrl->lock, flags); + + if (d && i == gpio_func && + test_and_clear_bit(d->hwirq, pctrl->disabled_for_mux)) { + /* + * Clear interrupts detected while not GPIO since we only + * masked things. + */ + if (d->parent_data && test_bit(d->hwirq, pctrl->skip_wake_irqs)) + irq_chip_set_parent_state(d, IRQCHIP_STATE_PENDING, false); + else + msm_ack_intr_status(pctrl, g); + + enable_irq(irq); + } + + return 0; +} + +static int msm_pinmux_request_gpio(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned offset) +{ + struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + const struct msm_pingroup *g = &pctrl->soc->groups[offset]; + + /* No funcs? Probably ACPI so can't do anything here */ + if (!g->nfuncs) + return 0; + + return msm_pinmux_set_mux(pctldev, g->funcs[pctrl->soc->gpio_func], offset); +} + +static const struct pinmux_ops msm_pinmux_ops = { + .request = msm_pinmux_request, + .get_functions_count = msm_get_functions_count, + .get_function_name = msm_get_function_name, + .get_function_groups = msm_get_function_groups, + .gpio_request_enable = msm_pinmux_request_gpio, + .set_mux = msm_pinmux_set_mux, +}; + +static int msm_config_reg(struct msm_pinctrl *pctrl, + const struct msm_pingroup *g, + unsigned param, + unsigned *mask, + unsigned *bit) +{ + switch (param) { + case PIN_CONFIG_BIAS_DISABLE: + case PIN_CONFIG_BIAS_PULL_DOWN: + case PIN_CONFIG_BIAS_BUS_HOLD: + case PIN_CONFIG_BIAS_PULL_UP: + *bit = g->pull_bit; + *mask = 3; + break; + case PIN_CONFIG_DRIVE_OPEN_DRAIN: + *bit = g->od_bit; + *mask = 1; + break; + case PIN_CONFIG_DRIVE_STRENGTH: + *bit = g->drv_bit; + *mask = 7; + break; + case PIN_CONFIG_OUTPUT: + case PIN_CONFIG_INPUT_ENABLE: + *bit = g->oe_bit; + *mask = 1; + break; + default: + return -ENOTSUPP; + } + + return 0; +} + +#define MSM_NO_PULL 0 +#define MSM_PULL_DOWN 1 +#define MSM_KEEPER 2 +#define MSM_PULL_UP_NO_KEEPER 2 +#define MSM_PULL_UP 3 + +static unsigned msm_regval_to_drive(u32 val) +{ + return (val + 1) * 2; +} + +static int msm_config_group_get(struct pinctrl_dev *pctldev, + unsigned int group, + unsigned long *config) +{ + const struct msm_pingroup *g; + struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + unsigned param = pinconf_to_config_param(*config); + unsigned mask; + unsigned arg; + unsigned bit; + int ret; + u32 val; + + g = &pctrl->soc->groups[group]; + + ret = msm_config_reg(pctrl, g, param, &mask, &bit); + if (ret < 0) + return ret; + + val = msm_readl_ctl(pctrl, g); + arg = (val >> bit) & mask; + + /* Convert register value to pinconf value */ + switch (param) { + case PIN_CONFIG_BIAS_DISABLE: + if (arg != MSM_NO_PULL) + return -EINVAL; + arg = 1; + break; + case PIN_CONFIG_BIAS_PULL_DOWN: + if (arg != MSM_PULL_DOWN) + return -EINVAL; + arg = 1; + break; + case PIN_CONFIG_BIAS_BUS_HOLD: + if (pctrl->soc->pull_no_keeper) + return -ENOTSUPP; + + if (arg != MSM_KEEPER) + return -EINVAL; + arg = 1; + break; + case PIN_CONFIG_BIAS_PULL_UP: + if (pctrl->soc->pull_no_keeper) + arg = arg == MSM_PULL_UP_NO_KEEPER; + else + arg = arg == MSM_PULL_UP; + if (!arg) + return -EINVAL; + break; + case PIN_CONFIG_DRIVE_OPEN_DRAIN: + /* Pin is not open-drain */ + if (!arg) + return -EINVAL; + arg = 1; + break; + case PIN_CONFIG_DRIVE_STRENGTH: + arg = msm_regval_to_drive(arg); + break; + case PIN_CONFIG_OUTPUT: + /* Pin is not output */ + if (!arg) + return -EINVAL; + + val = msm_readl_io(pctrl, g); + arg = !!(val & BIT(g->in_bit)); + break; + case PIN_CONFIG_INPUT_ENABLE: + /* Pin is output */ + if (arg) + return -EINVAL; + arg = 1; + break; + default: + return -ENOTSUPP; + } + + *config = pinconf_to_config_packed(param, arg); + + return 0; +} + +static int msm_config_group_set(struct pinctrl_dev *pctldev, + unsigned group, + unsigned long *configs, + unsigned num_configs) +{ + const struct msm_pingroup *g; + struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + unsigned long flags; + unsigned param; + unsigned mask; + unsigned arg; + unsigned bit; + int ret; + u32 val; + int i; + + g = &pctrl->soc->groups[group]; + + for (i = 0; i < num_configs; i++) { + param = pinconf_to_config_param(configs[i]); + arg = pinconf_to_config_argument(configs[i]); + + ret = msm_config_reg(pctrl, g, param, &mask, &bit); + if (ret < 0) + return ret; + + /* Convert pinconf values to register values */ + switch (param) { + case PIN_CONFIG_BIAS_DISABLE: + arg = MSM_NO_PULL; + break; + case PIN_CONFIG_BIAS_PULL_DOWN: + arg = MSM_PULL_DOWN; + break; + case PIN_CONFIG_BIAS_BUS_HOLD: + if (pctrl->soc->pull_no_keeper) + return -ENOTSUPP; + + arg = MSM_KEEPER; + break; + case PIN_CONFIG_BIAS_PULL_UP: + if (pctrl->soc->pull_no_keeper) + arg = MSM_PULL_UP_NO_KEEPER; + else + arg = MSM_PULL_UP; + break; + case PIN_CONFIG_DRIVE_OPEN_DRAIN: + arg = 1; + break; + case PIN_CONFIG_DRIVE_STRENGTH: + /* Check for invalid values */ + if (arg > 16 || arg < 2 || (arg % 2) != 0) + arg = -1; + else + arg = (arg / 2) - 1; + break; + case PIN_CONFIG_OUTPUT: + /* set output value */ + raw_spin_lock_irqsave(&pctrl->lock, flags); + val = msm_readl_io(pctrl, g); + if (arg) + val |= BIT(g->out_bit); + else + val &= ~BIT(g->out_bit); + msm_writel_io(val, pctrl, g); + raw_spin_unlock_irqrestore(&pctrl->lock, flags); + + /* enable output */ + arg = 1; + break; + case PIN_CONFIG_INPUT_ENABLE: + /* disable output */ + arg = 0; + break; + default: + dev_err(pctrl->dev, "Unsupported config parameter: %x\n", + param); + return -EINVAL; + } + + /* Range-check user-supplied value */ + if (arg & ~mask) { + dev_err(pctrl->dev, "config %x: %x is invalid\n", param, arg); + return -EINVAL; + } + + raw_spin_lock_irqsave(&pctrl->lock, flags); + val = msm_readl_ctl(pctrl, g); + val &= ~(mask << bit); + val |= arg << bit; + msm_writel_ctl(val, pctrl, g); + raw_spin_unlock_irqrestore(&pctrl->lock, flags); + } + + return 0; +} + +static const struct pinconf_ops msm_pinconf_ops = { + .is_generic = true, + .pin_config_group_get = msm_config_group_get, + .pin_config_group_set = msm_config_group_set, +}; + +static int msm_gpio_direction_input(struct gpio_chip *chip, unsigned offset) +{ + const struct msm_pingroup *g; + struct msm_pinctrl *pctrl = gpiochip_get_data(chip); + unsigned long flags; + u32 val; + + g = &pctrl->soc->groups[offset]; + + raw_spin_lock_irqsave(&pctrl->lock, flags); + + val = msm_readl_ctl(pctrl, g); + val &= ~BIT(g->oe_bit); + msm_writel_ctl(val, pctrl, g); + + raw_spin_unlock_irqrestore(&pctrl->lock, flags); + + return 0; +} + +static int msm_gpio_direction_output(struct gpio_chip *chip, unsigned offset, int value) +{ + const struct msm_pingroup *g; + struct msm_pinctrl *pctrl = gpiochip_get_data(chip); + unsigned long flags; + u32 val; + + g = &pctrl->soc->groups[offset]; + + raw_spin_lock_irqsave(&pctrl->lock, flags); + + val = msm_readl_io(pctrl, g); + if (value) + val |= BIT(g->out_bit); + else + val &= ~BIT(g->out_bit); + msm_writel_io(val, pctrl, g); + + val = msm_readl_ctl(pctrl, g); + val |= BIT(g->oe_bit); + msm_writel_ctl(val, pctrl, g); + + raw_spin_unlock_irqrestore(&pctrl->lock, flags); + + return 0; +} + +static int msm_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) +{ + struct msm_pinctrl *pctrl = gpiochip_get_data(chip); + const struct msm_pingroup *g; + u32 val; + + g = &pctrl->soc->groups[offset]; + + val = msm_readl_ctl(pctrl, g); + + return val & BIT(g->oe_bit) ? GPIO_LINE_DIRECTION_OUT : + GPIO_LINE_DIRECTION_IN; +} + +static int msm_gpio_get(struct gpio_chip *chip, unsigned offset) +{ + const struct msm_pingroup *g; + struct msm_pinctrl *pctrl = gpiochip_get_data(chip); + u32 val; + + g = &pctrl->soc->groups[offset]; + + val = msm_readl_io(pctrl, g); + return !!(val & BIT(g->in_bit)); +} + +static void msm_gpio_set(struct gpio_chip *chip, unsigned offset, int value) +{ + const struct msm_pingroup *g; + struct msm_pinctrl *pctrl = gpiochip_get_data(chip); + unsigned long flags; + u32 val; + + g = &pctrl->soc->groups[offset]; + + raw_spin_lock_irqsave(&pctrl->lock, flags); + + val = msm_readl_io(pctrl, g); + if (value) + val |= BIT(g->out_bit); + else + val &= ~BIT(g->out_bit); + msm_writel_io(val, pctrl, g); + + raw_spin_unlock_irqrestore(&pctrl->lock, flags); +} + +#ifdef CONFIG_DEBUG_FS +#include <linux/seq_file.h> + +static void msm_gpio_dbg_show_one(struct seq_file *s, + struct pinctrl_dev *pctldev, + struct gpio_chip *chip, + unsigned offset, + unsigned gpio) +{ + const struct msm_pingroup *g; + struct msm_pinctrl *pctrl = gpiochip_get_data(chip); + unsigned func; + int is_out; + int drive; + int pull; + int val; + int egpio_enable; + u32 ctl_reg, io_reg; + + static const char * const pulls_keeper[] = { + "no pull", + "pull down", + "keeper", + "pull up" + }; + + static const char * const pulls_no_keeper[] = { + "no pull", + "pull down", + "pull up", + }; + + if (!gpiochip_line_is_valid(chip, offset)) + return; + + g = &pctrl->soc->groups[offset]; + ctl_reg = msm_readl_ctl(pctrl, g); + io_reg = msm_readl_io(pctrl, g); + + is_out = !!(ctl_reg & BIT(g->oe_bit)); + func = (ctl_reg >> g->mux_bit) & 7; + drive = (ctl_reg >> g->drv_bit) & 7; + pull = (ctl_reg >> g->pull_bit) & 3; + egpio_enable = 0; + if (pctrl->soc->egpio_func && ctl_reg & BIT(g->egpio_present)) + egpio_enable = !(ctl_reg & BIT(g->egpio_enable)); + + if (is_out) + val = !!(io_reg & BIT(g->out_bit)); + else + val = !!(io_reg & BIT(g->in_bit)); + + if (egpio_enable) { + seq_printf(s, " %-8s: egpio\n", g->name); + return; + } + + seq_printf(s, " %-8s: %-3s", g->name, is_out ? "out" : "in"); + seq_printf(s, " %-4s func%d", val ? "high" : "low", func); + seq_printf(s, " %dmA", msm_regval_to_drive(drive)); + if (pctrl->soc->pull_no_keeper) + seq_printf(s, " %s", pulls_no_keeper[pull]); + else + seq_printf(s, " %s", pulls_keeper[pull]); + seq_puts(s, "\n"); +} + +static void msm_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) +{ + unsigned gpio = chip->base; + unsigned i; + + for (i = 0; i < chip->ngpio; i++, gpio++) + msm_gpio_dbg_show_one(s, NULL, chip, i, gpio); +} + +#else +#define msm_gpio_dbg_show NULL +#endif + +static int msm_gpio_init_valid_mask(struct gpio_chip *gc, + unsigned long *valid_mask, + unsigned int ngpios) +{ + struct msm_pinctrl *pctrl = gpiochip_get_data(gc); + int ret; + unsigned int len, i; + const int *reserved = pctrl->soc->reserved_gpios; + u16 *tmp; + + /* Driver provided reserved list overrides DT and ACPI */ + if (reserved) { + bitmap_fill(valid_mask, ngpios); + for (i = 0; reserved[i] >= 0; i++) { + if (i >= ngpios || reserved[i] >= ngpios) { + dev_err(pctrl->dev, "invalid list of reserved GPIOs\n"); + return -EINVAL; + } + clear_bit(reserved[i], valid_mask); + } + + return 0; + } + + /* The number of GPIOs in the ACPI tables */ + len = ret = device_property_count_u16(pctrl->dev, "gpios"); + if (ret < 0) + return 0; + + if (ret > ngpios) + return -EINVAL; + + tmp = kmalloc_array(len, sizeof(*tmp), GFP_KERNEL); + if (!tmp) + return -ENOMEM; + + ret = device_property_read_u16_array(pctrl->dev, "gpios", tmp, len); + if (ret < 0) { + dev_err(pctrl->dev, "could not read list of GPIOs\n"); + goto out; + } + + bitmap_zero(valid_mask, ngpios); + for (i = 0; i < len; i++) + set_bit(tmp[i], valid_mask); + +out: + kfree(tmp); + return ret; +} + +static const struct gpio_chip msm_gpio_template = { + .direction_input = msm_gpio_direction_input, + .direction_output = msm_gpio_direction_output, + .get_direction = msm_gpio_get_direction, + .get = msm_gpio_get, + .set = msm_gpio_set, + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, + .dbg_show = msm_gpio_dbg_show, +}; + +/* For dual-edge interrupts in software, since some hardware has no + * such support: + * + * At appropriate moments, this function may be called to flip the polarity + * settings of both-edge irq lines to try and catch the next edge. + * + * The attempt is considered successful if: + * - the status bit goes high, indicating that an edge was caught, or + * - the input value of the gpio doesn't change during the attempt. + * If the value changes twice during the process, that would cause the first + * test to fail but would force the second, as two opposite + * transitions would cause a detection no matter the polarity setting. + * + * The do-loop tries to sledge-hammer closed the timing hole between + * the initial value-read and the polarity-write - if the line value changes + * during that window, an interrupt is lost, the new polarity setting is + * incorrect, and the first success test will fail, causing a retry. + * + * Algorithm comes from Google's msmgpio driver. + */ +static void msm_gpio_update_dual_edge_pos(struct msm_pinctrl *pctrl, + const struct msm_pingroup *g, + struct irq_data *d) +{ + int loop_limit = 100; + unsigned val, val2, intstat; + unsigned pol; + + do { + val = msm_readl_io(pctrl, g) & BIT(g->in_bit); + + pol = msm_readl_intr_cfg(pctrl, g); + pol ^= BIT(g->intr_polarity_bit); + msm_writel_intr_cfg(pol, pctrl, g); + + val2 = msm_readl_io(pctrl, g) & BIT(g->in_bit); + intstat = msm_readl_intr_status(pctrl, g); + if (intstat || (val == val2)) + return; + } while (loop_limit-- > 0); + dev_err(pctrl->dev, "dual-edge irq failed to stabilize, %#08x != %#08x\n", + val, val2); +} + +static void msm_gpio_irq_mask(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct msm_pinctrl *pctrl = gpiochip_get_data(gc); + const struct msm_pingroup *g; + unsigned long flags; + u32 val; + + if (d->parent_data) + irq_chip_mask_parent(d); + + if (test_bit(d->hwirq, pctrl->skip_wake_irqs)) + return; + + g = &pctrl->soc->groups[d->hwirq]; + + raw_spin_lock_irqsave(&pctrl->lock, flags); + + val = msm_readl_intr_cfg(pctrl, g); + /* + * There are two bits that control interrupt forwarding to the CPU. The + * RAW_STATUS_EN bit causes the level or edge sensed on the line to be + * latched into the interrupt status register when the hardware detects + * an irq that it's configured for (either edge for edge type or level + * for level type irq). The 'non-raw' status enable bit causes the + * hardware to assert the summary interrupt to the CPU if the latched + * status bit is set. There's a bug though, the edge detection logic + * seems to have a problem where toggling the RAW_STATUS_EN bit may + * cause the status bit to latch spuriously when there isn't any edge + * so we can't touch that bit for edge type irqs and we have to keep + * the bit set anyway so that edges are latched while the line is masked. + * + * To make matters more complicated, leaving the RAW_STATUS_EN bit + * enabled all the time causes level interrupts to re-latch into the + * status register because the level is still present on the line after + * we ack it. We clear the raw status enable bit during mask here and + * set the bit on unmask so the interrupt can't latch into the hardware + * while it's masked. + */ + if (irqd_get_trigger_type(d) & IRQ_TYPE_LEVEL_MASK) + val &= ~BIT(g->intr_raw_status_bit); + + val &= ~BIT(g->intr_enable_bit); + msm_writel_intr_cfg(val, pctrl, g); + + clear_bit(d->hwirq, pctrl->enabled_irqs); + + raw_spin_unlock_irqrestore(&pctrl->lock, flags); +} + +static void msm_gpio_irq_unmask(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct msm_pinctrl *pctrl = gpiochip_get_data(gc); + const struct msm_pingroup *g; + unsigned long flags; + u32 val; + + if (d->parent_data) + irq_chip_unmask_parent(d); + + if (test_bit(d->hwirq, pctrl->skip_wake_irqs)) + return; + + g = &pctrl->soc->groups[d->hwirq]; + + raw_spin_lock_irqsave(&pctrl->lock, flags); + + val = msm_readl_intr_cfg(pctrl, g); + val |= BIT(g->intr_raw_status_bit); + val |= BIT(g->intr_enable_bit); + msm_writel_intr_cfg(val, pctrl, g); + + set_bit(d->hwirq, pctrl->enabled_irqs); + + raw_spin_unlock_irqrestore(&pctrl->lock, flags); +} + +static void msm_gpio_irq_enable(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct msm_pinctrl *pctrl = gpiochip_get_data(gc); + + gpiochip_enable_irq(gc, d->hwirq); + + if (d->parent_data) + irq_chip_enable_parent(d); + + if (!test_bit(d->hwirq, pctrl->skip_wake_irqs)) + msm_gpio_irq_unmask(d); +} + +static void msm_gpio_irq_disable(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct msm_pinctrl *pctrl = gpiochip_get_data(gc); + + if (d->parent_data) + irq_chip_disable_parent(d); + + if (!test_bit(d->hwirq, pctrl->skip_wake_irqs)) + msm_gpio_irq_mask(d); + + gpiochip_disable_irq(gc, d->hwirq); +} + +/** + * msm_gpio_update_dual_edge_parent() - Prime next edge for IRQs handled by parent. + * @d: The irq dta. + * + * This is much like msm_gpio_update_dual_edge_pos() but for IRQs that are + * normally handled by the parent irqchip. The logic here is slightly + * different due to what's easy to do with our parent, but in principle it's + * the same. + */ +static void msm_gpio_update_dual_edge_parent(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct msm_pinctrl *pctrl = gpiochip_get_data(gc); + const struct msm_pingroup *g = &pctrl->soc->groups[d->hwirq]; + int loop_limit = 100; + unsigned int val; + unsigned int type; + + /* Read the value and make a guess about what edge we need to catch */ + val = msm_readl_io(pctrl, g) & BIT(g->in_bit); + type = val ? IRQ_TYPE_EDGE_FALLING : IRQ_TYPE_EDGE_RISING; + + do { + /* Set the parent to catch the next edge */ + irq_chip_set_type_parent(d, type); + + /* + * Possibly the line changed between when we last read "val" + * (and decided what edge we needed) and when set the edge. + * If the value didn't change (or changed and then changed + * back) then we're done. + */ + val = msm_readl_io(pctrl, g) & BIT(g->in_bit); + if (type == IRQ_TYPE_EDGE_RISING) { + if (!val) + return; + type = IRQ_TYPE_EDGE_FALLING; + } else if (type == IRQ_TYPE_EDGE_FALLING) { + if (val) + return; + type = IRQ_TYPE_EDGE_RISING; + } + } while (loop_limit-- > 0); + dev_warn_once(pctrl->dev, "dual-edge irq failed to stabilize\n"); +} + +static void msm_gpio_irq_ack(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct msm_pinctrl *pctrl = gpiochip_get_data(gc); + const struct msm_pingroup *g; + unsigned long flags; + + if (test_bit(d->hwirq, pctrl->skip_wake_irqs)) { + if (test_bit(d->hwirq, pctrl->dual_edge_irqs)) + msm_gpio_update_dual_edge_parent(d); + return; + } + + g = &pctrl->soc->groups[d->hwirq]; + + raw_spin_lock_irqsave(&pctrl->lock, flags); + + msm_ack_intr_status(pctrl, g); + + if (test_bit(d->hwirq, pctrl->dual_edge_irqs)) + msm_gpio_update_dual_edge_pos(pctrl, g, d); + + raw_spin_unlock_irqrestore(&pctrl->lock, flags); +} + +static void msm_gpio_irq_eoi(struct irq_data *d) +{ + d = d->parent_data; + + if (d) + d->chip->irq_eoi(d); +} + +static bool msm_gpio_needs_dual_edge_parent_workaround(struct irq_data *d, + unsigned int type) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct msm_pinctrl *pctrl = gpiochip_get_data(gc); + + return type == IRQ_TYPE_EDGE_BOTH && + pctrl->soc->wakeirq_dual_edge_errata && d->parent_data && + test_bit(d->hwirq, pctrl->skip_wake_irqs); +} + +static int msm_gpio_irq_set_type(struct irq_data *d, unsigned int type) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct msm_pinctrl *pctrl = gpiochip_get_data(gc); + const struct msm_pingroup *g; + unsigned long flags; + bool was_enabled; + u32 val; + + if (msm_gpio_needs_dual_edge_parent_workaround(d, type)) { + set_bit(d->hwirq, pctrl->dual_edge_irqs); + irq_set_handler_locked(d, handle_fasteoi_ack_irq); + msm_gpio_update_dual_edge_parent(d); + return 0; + } + + if (d->parent_data) + irq_chip_set_type_parent(d, type); + + if (test_bit(d->hwirq, pctrl->skip_wake_irqs)) { + clear_bit(d->hwirq, pctrl->dual_edge_irqs); + irq_set_handler_locked(d, handle_fasteoi_irq); + return 0; + } + + g = &pctrl->soc->groups[d->hwirq]; + + raw_spin_lock_irqsave(&pctrl->lock, flags); + + /* + * For hw without possibility of detecting both edges + */ + if (g->intr_detection_width == 1 && type == IRQ_TYPE_EDGE_BOTH) + set_bit(d->hwirq, pctrl->dual_edge_irqs); + else + clear_bit(d->hwirq, pctrl->dual_edge_irqs); + + /* Route interrupts to application cpu. + * With intr_target_use_scm interrupts are routed to + * application cpu using scm calls. + */ + if (pctrl->intr_target_use_scm) { + u32 addr = pctrl->phys_base[0] + g->intr_target_reg; + int ret; + + qcom_scm_io_readl(addr, &val); + + val &= ~(7 << g->intr_target_bit); + val |= g->intr_target_kpss_val << g->intr_target_bit; + + ret = qcom_scm_io_writel(addr, val); + if (ret) + dev_err(pctrl->dev, + "Failed routing %lu interrupt to Apps proc", + d->hwirq); + } else { + val = msm_readl_intr_target(pctrl, g); + val &= ~(7 << g->intr_target_bit); + val |= g->intr_target_kpss_val << g->intr_target_bit; + msm_writel_intr_target(val, pctrl, g); + } + + /* Update configuration for gpio. + * RAW_STATUS_EN is left on for all gpio irqs. Due to the + * internal circuitry of TLMM, toggling the RAW_STATUS + * could cause the INTR_STATUS to be set for EDGE interrupts. + */ + val = msm_readl_intr_cfg(pctrl, g); + was_enabled = val & BIT(g->intr_raw_status_bit); + val |= BIT(g->intr_raw_status_bit); + if (g->intr_detection_width == 2) { + val &= ~(3 << g->intr_detection_bit); + val &= ~(1 << g->intr_polarity_bit); + switch (type) { + case IRQ_TYPE_EDGE_RISING: + val |= 1 << g->intr_detection_bit; + val |= BIT(g->intr_polarity_bit); + break; + case IRQ_TYPE_EDGE_FALLING: + val |= 2 << g->intr_detection_bit; + val |= BIT(g->intr_polarity_bit); + break; + case IRQ_TYPE_EDGE_BOTH: + val |= 3 << g->intr_detection_bit; + val |= BIT(g->intr_polarity_bit); + break; + case IRQ_TYPE_LEVEL_LOW: + break; + case IRQ_TYPE_LEVEL_HIGH: + val |= BIT(g->intr_polarity_bit); + break; + } + } else if (g->intr_detection_width == 1) { + val &= ~(1 << g->intr_detection_bit); + val &= ~(1 << g->intr_polarity_bit); + switch (type) { + case IRQ_TYPE_EDGE_RISING: + val |= BIT(g->intr_detection_bit); + val |= BIT(g->intr_polarity_bit); + break; + case IRQ_TYPE_EDGE_FALLING: + val |= BIT(g->intr_detection_bit); + break; + case IRQ_TYPE_EDGE_BOTH: + val |= BIT(g->intr_detection_bit); + val |= BIT(g->intr_polarity_bit); + break; + case IRQ_TYPE_LEVEL_LOW: + break; + case IRQ_TYPE_LEVEL_HIGH: + val |= BIT(g->intr_polarity_bit); + break; + } + } else { + BUG(); + } + msm_writel_intr_cfg(val, pctrl, g); + + /* + * The first time we set RAW_STATUS_EN it could trigger an interrupt. + * Clear the interrupt. This is safe because we have + * IRQCHIP_SET_TYPE_MASKED. + */ + if (!was_enabled) + msm_ack_intr_status(pctrl, g); + + if (test_bit(d->hwirq, pctrl->dual_edge_irqs)) + msm_gpio_update_dual_edge_pos(pctrl, g, d); + + raw_spin_unlock_irqrestore(&pctrl->lock, flags); + + if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH)) + irq_set_handler_locked(d, handle_level_irq); + else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING)) + irq_set_handler_locked(d, handle_edge_irq); + + return 0; +} + +static int msm_gpio_irq_set_wake(struct irq_data *d, unsigned int on) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct msm_pinctrl *pctrl = gpiochip_get_data(gc); + + /* + * While they may not wake up when the TLMM is powered off, + * some GPIOs would like to wakeup the system from suspend + * when TLMM is powered on. To allow that, enable the GPIO + * summary line to be wakeup capable at GIC. + */ + if (d->parent_data && test_bit(d->hwirq, pctrl->skip_wake_irqs)) + return irq_chip_set_wake_parent(d, on); + + return irq_set_irq_wake(pctrl->irq, on); +} + +static int msm_gpio_irq_reqres(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct msm_pinctrl *pctrl = gpiochip_get_data(gc); + int ret; + + if (!try_module_get(gc->owner)) + return -ENODEV; + + ret = msm_pinmux_request_gpio(pctrl->pctrl, NULL, d->hwirq); + if (ret) + goto out; + msm_gpio_direction_input(gc, d->hwirq); + + if (gpiochip_lock_as_irq(gc, d->hwirq)) { + dev_err(gc->parent, + "unable to lock HW IRQ %lu for IRQ\n", + d->hwirq); + ret = -EINVAL; + goto out; + } + + /* + * The disable / clear-enable workaround we do in msm_pinmux_set_mux() + * only works if disable is not lazy since we only clear any bogus + * interrupt in hardware. Explicitly mark the interrupt as UNLAZY. + */ + irq_set_status_flags(d->irq, IRQ_DISABLE_UNLAZY); + + return 0; +out: + module_put(gc->owner); + return ret; +} + +static void msm_gpio_irq_relres(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + + gpiochip_unlock_as_irq(gc, d->hwirq); + module_put(gc->owner); +} + +static int msm_gpio_irq_set_affinity(struct irq_data *d, + const struct cpumask *dest, bool force) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct msm_pinctrl *pctrl = gpiochip_get_data(gc); + + if (d->parent_data && test_bit(d->hwirq, pctrl->skip_wake_irqs)) + return irq_chip_set_affinity_parent(d, dest, force); + + return -EINVAL; +} + +static int msm_gpio_irq_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct msm_pinctrl *pctrl = gpiochip_get_data(gc); + + if (d->parent_data && test_bit(d->hwirq, pctrl->skip_wake_irqs)) + return irq_chip_set_vcpu_affinity_parent(d, vcpu_info); + + return -EINVAL; +} + +static void msm_gpio_irq_handler(struct irq_desc *desc) +{ + struct gpio_chip *gc = irq_desc_get_handler_data(desc); + const struct msm_pingroup *g; + struct msm_pinctrl *pctrl = gpiochip_get_data(gc); + struct irq_chip *chip = irq_desc_get_chip(desc); + int handled = 0; + u32 val; + int i; + + chained_irq_enter(chip, desc); + + /* + * Each pin has it's own IRQ status register, so use + * enabled_irq bitmap to limit the number of reads. + */ + for_each_set_bit(i, pctrl->enabled_irqs, pctrl->chip.ngpio) { + g = &pctrl->soc->groups[i]; + val = msm_readl_intr_status(pctrl, g); + if (val & BIT(g->intr_status_bit)) { + generic_handle_domain_irq(gc->irq.domain, i); + handled++; + } + } + + /* No interrupts were flagged */ + if (handled == 0) + handle_bad_irq(desc); + + chained_irq_exit(chip, desc); +} + +static int msm_gpio_wakeirq(struct gpio_chip *gc, + unsigned int child, + unsigned int child_type, + unsigned int *parent, + unsigned int *parent_type) +{ + struct msm_pinctrl *pctrl = gpiochip_get_data(gc); + const struct msm_gpio_wakeirq_map *map; + int i; + + *parent = GPIO_NO_WAKE_IRQ; + *parent_type = IRQ_TYPE_EDGE_RISING; + + for (i = 0; i < pctrl->soc->nwakeirq_map; i++) { + map = &pctrl->soc->wakeirq_map[i]; + if (map->gpio == child) { + *parent = map->wakeirq; + break; + } + } + + return 0; +} + +static bool msm_gpio_needs_valid_mask(struct msm_pinctrl *pctrl) +{ + if (pctrl->soc->reserved_gpios) + return true; + + return device_property_count_u16(pctrl->dev, "gpios") > 0; +} + +static const struct irq_chip msm_gpio_irq_chip = { + .name = "msmgpio", + .irq_enable = msm_gpio_irq_enable, + .irq_disable = msm_gpio_irq_disable, + .irq_mask = msm_gpio_irq_mask, + .irq_unmask = msm_gpio_irq_unmask, + .irq_ack = msm_gpio_irq_ack, + .irq_eoi = msm_gpio_irq_eoi, + .irq_set_type = msm_gpio_irq_set_type, + .irq_set_wake = msm_gpio_irq_set_wake, + .irq_request_resources = msm_gpio_irq_reqres, + .irq_release_resources = msm_gpio_irq_relres, + .irq_set_affinity = msm_gpio_irq_set_affinity, + .irq_set_vcpu_affinity = msm_gpio_irq_set_vcpu_affinity, + .flags = (IRQCHIP_MASK_ON_SUSPEND | + IRQCHIP_SET_TYPE_MASKED | + IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND | + IRQCHIP_IMMUTABLE), +}; + +static int msm_gpio_init(struct msm_pinctrl *pctrl) +{ + struct gpio_chip *chip; + struct gpio_irq_chip *girq; + int i, ret; + unsigned gpio, ngpio = pctrl->soc->ngpios; + struct device_node *np; + bool skip; + + if (WARN_ON(ngpio > MAX_NR_GPIO)) + return -EINVAL; + + chip = &pctrl->chip; + chip->base = -1; + chip->ngpio = ngpio; + chip->label = dev_name(pctrl->dev); + chip->parent = pctrl->dev; + chip->owner = THIS_MODULE; + if (msm_gpio_needs_valid_mask(pctrl)) + chip->init_valid_mask = msm_gpio_init_valid_mask; + + np = of_parse_phandle(pctrl->dev->of_node, "wakeup-parent", 0); + if (np) { + chip->irq.parent_domain = irq_find_matching_host(np, + DOMAIN_BUS_WAKEUP); + of_node_put(np); + if (!chip->irq.parent_domain) + return -EPROBE_DEFER; + chip->irq.child_to_parent_hwirq = msm_gpio_wakeirq; + /* + * Let's skip handling the GPIOs, if the parent irqchip + * is handling the direct connect IRQ of the GPIO. + */ + skip = irq_domain_qcom_handle_wakeup(chip->irq.parent_domain); + for (i = 0; skip && i < pctrl->soc->nwakeirq_map; i++) { + gpio = pctrl->soc->wakeirq_map[i].gpio; + set_bit(gpio, pctrl->skip_wake_irqs); + } + } + + girq = &chip->irq; + gpio_irq_chip_set_chip(girq, &msm_gpio_irq_chip); + girq->parent_handler = msm_gpio_irq_handler; + girq->fwnode = pctrl->dev->fwnode; + girq->num_parents = 1; + girq->parents = devm_kcalloc(pctrl->dev, 1, sizeof(*girq->parents), + GFP_KERNEL); + if (!girq->parents) + return -ENOMEM; + girq->default_type = IRQ_TYPE_NONE; + girq->handler = handle_bad_irq; + girq->parents[0] = pctrl->irq; + + ret = gpiochip_add_data(&pctrl->chip, pctrl); + if (ret) { + dev_err(pctrl->dev, "Failed register gpiochip\n"); + return ret; + } + + /* + * For DeviceTree-supported systems, the gpio core checks the + * pinctrl's device node for the "gpio-ranges" property. + * If it is present, it takes care of adding the pin ranges + * for the driver. In this case the driver can skip ahead. + * + * In order to remain compatible with older, existing DeviceTree + * files which don't set the "gpio-ranges" property or systems that + * utilize ACPI the driver has to call gpiochip_add_pin_range(). + */ + if (!of_property_read_bool(pctrl->dev->of_node, "gpio-ranges")) { + ret = gpiochip_add_pin_range(&pctrl->chip, + dev_name(pctrl->dev), 0, 0, chip->ngpio); + if (ret) { + dev_err(pctrl->dev, "Failed to add pin range\n"); + gpiochip_remove(&pctrl->chip); + return ret; + } + } + + return 0; +} + +static int msm_ps_hold_restart(struct notifier_block *nb, unsigned long action, + void *data) +{ + struct msm_pinctrl *pctrl = container_of(nb, struct msm_pinctrl, restart_nb); + + writel(0, pctrl->regs[0] + PS_HOLD_OFFSET); + mdelay(1000); + return NOTIFY_DONE; +} + +static struct msm_pinctrl *poweroff_pctrl; + +static void msm_ps_hold_poweroff(void) +{ + msm_ps_hold_restart(&poweroff_pctrl->restart_nb, 0, NULL); +} + +static void msm_pinctrl_setup_pm_reset(struct msm_pinctrl *pctrl) +{ + int i; + const struct msm_function *func = pctrl->soc->functions; + + for (i = 0; i < pctrl->soc->nfunctions; i++) + if (!strcmp(func[i].name, "ps_hold")) { + pctrl->restart_nb.notifier_call = msm_ps_hold_restart; + pctrl->restart_nb.priority = 128; + if (register_restart_handler(&pctrl->restart_nb)) + dev_err(pctrl->dev, + "failed to setup restart handler.\n"); + poweroff_pctrl = pctrl; + pm_power_off = msm_ps_hold_poweroff; + break; + } +} + +static __maybe_unused int msm_pinctrl_suspend(struct device *dev) +{ + struct msm_pinctrl *pctrl = dev_get_drvdata(dev); + + return pinctrl_force_sleep(pctrl->pctrl); +} + +static __maybe_unused int msm_pinctrl_resume(struct device *dev) +{ + struct msm_pinctrl *pctrl = dev_get_drvdata(dev); + + return pinctrl_force_default(pctrl->pctrl); +} + +SIMPLE_DEV_PM_OPS(msm_pinctrl_dev_pm_ops, msm_pinctrl_suspend, + msm_pinctrl_resume); + +EXPORT_SYMBOL(msm_pinctrl_dev_pm_ops); + +int msm_pinctrl_probe(struct platform_device *pdev, + const struct msm_pinctrl_soc_data *soc_data) +{ + struct msm_pinctrl *pctrl; + struct resource *res; + int ret; + int i; + + pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL); + if (!pctrl) + return -ENOMEM; + + pctrl->dev = &pdev->dev; + pctrl->soc = soc_data; + pctrl->chip = msm_gpio_template; + pctrl->intr_target_use_scm = of_device_is_compatible( + pctrl->dev->of_node, + "qcom,ipq8064-pinctrl"); + + raw_spin_lock_init(&pctrl->lock); + + if (soc_data->tiles) { + for (i = 0; i < soc_data->ntiles; i++) { + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + soc_data->tiles[i]); + pctrl->regs[i] = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(pctrl->regs[i])) + return PTR_ERR(pctrl->regs[i]); + } + } else { + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + pctrl->regs[0] = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(pctrl->regs[0])) + return PTR_ERR(pctrl->regs[0]); + + pctrl->phys_base[0] = res->start; + } + + msm_pinctrl_setup_pm_reset(pctrl); + + pctrl->irq = platform_get_irq(pdev, 0); + if (pctrl->irq < 0) + return pctrl->irq; + + pctrl->desc.owner = THIS_MODULE; + pctrl->desc.pctlops = &msm_pinctrl_ops; + pctrl->desc.pmxops = &msm_pinmux_ops; + pctrl->desc.confops = &msm_pinconf_ops; + pctrl->desc.name = dev_name(&pdev->dev); + pctrl->desc.pins = pctrl->soc->pins; + pctrl->desc.npins = pctrl->soc->npins; + + pctrl->pctrl = devm_pinctrl_register(&pdev->dev, &pctrl->desc, pctrl); + if (IS_ERR(pctrl->pctrl)) { + dev_err(&pdev->dev, "Couldn't register pinctrl driver\n"); + return PTR_ERR(pctrl->pctrl); + } + + ret = msm_gpio_init(pctrl); + if (ret) + return ret; + + platform_set_drvdata(pdev, pctrl); + + dev_dbg(&pdev->dev, "Probed Qualcomm pinctrl driver\n"); + + return 0; +} +EXPORT_SYMBOL(msm_pinctrl_probe); + +int msm_pinctrl_remove(struct platform_device *pdev) +{ + struct msm_pinctrl *pctrl = platform_get_drvdata(pdev); + + gpiochip_remove(&pctrl->chip); + + unregister_restart_handler(&pctrl->restart_nb); + + return 0; +} +EXPORT_SYMBOL(msm_pinctrl_remove); + +MODULE_DESCRIPTION("Qualcomm Technologies, Inc. TLMM driver"); +MODULE_LICENSE("GPL v2"); |