diff options
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/intel/pinctrl-cherryview.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/pinctrl/intel/pinctrl-cherryview.c b/drivers/pinctrl/intel/pinctrl-cherryview.c index f80134e3e0b6..83640afd825c 100644 --- a/drivers/pinctrl/intel/pinctrl-cherryview.c +++ b/drivers/pinctrl/intel/pinctrl-cherryview.c @@ -148,6 +148,7 @@ struct chv_community { size_t ngpio_ranges; size_t ngpios; size_t nirqs; + acpi_adr_space_type acpi_space_id; }; struct chv_pin_context { @@ -404,6 +405,7 @@ static const struct chv_community southwest_community = { * trigger GPEs. */ .nirqs = 8, + .acpi_space_id = 0x91, }; static const struct pinctrl_pin_desc north_pins[] = { @@ -493,6 +495,7 @@ static const struct chv_community north_community = { * GPEs. */ .nirqs = 8, + .acpi_space_id = 0x92, }; static const struct pinctrl_pin_desc east_pins[] = { @@ -536,6 +539,7 @@ static const struct chv_community east_community = { .ngpio_ranges = ARRAY_SIZE(east_gpio_ranges), .ngpios = ARRAY_SIZE(east_pins), .nirqs = 16, + .acpi_space_id = 0x93, }; static const struct pinctrl_pin_desc southeast_pins[] = { @@ -662,6 +666,7 @@ static const struct chv_community southeast_community = { .ngpio_ranges = ARRAY_SIZE(southeast_gpio_ranges), .ngpios = ARRAY_SIZE(southeast_pins), .nirqs = 16, + .acpi_space_id = 0x94, }; static const struct chv_community *chv_communities[] = { @@ -1586,11 +1591,34 @@ static int chv_gpio_probe(struct chv_pinctrl *pctrl, int irq) return 0; } +static acpi_status chv_pinctrl_mmio_access_handler(u32 function, + acpi_physical_address address, u32 bits, u64 *value, + void *handler_context, void *region_context) +{ + struct chv_pinctrl *pctrl = region_context; + unsigned long flags; + acpi_status ret = AE_OK; + + raw_spin_lock_irqsave(&chv_lock, flags); + + if (function == ACPI_WRITE) + chv_writel((u32)(*value), pctrl->regs + (u32)address); + else if (function == ACPI_READ) + *value = readl(pctrl->regs + (u32)address); + else + ret = AE_BAD_PARAMETER; + + raw_spin_unlock_irqrestore(&chv_lock, flags); + + return ret; +} + static int chv_pinctrl_probe(struct platform_device *pdev) { struct chv_pinctrl *pctrl; struct acpi_device *adev; struct resource *res; + acpi_status status; int ret, irq, i; adev = ACPI_COMPANION(&pdev->dev); @@ -1646,11 +1674,29 @@ static int chv_pinctrl_probe(struct platform_device *pdev) if (ret) return ret; + status = acpi_install_address_space_handler(adev->handle, + pctrl->community->acpi_space_id, + chv_pinctrl_mmio_access_handler, + NULL, pctrl); + if (ACPI_FAILURE(status)) + dev_err(&pdev->dev, "failed to install ACPI addr space handler\n"); + platform_set_drvdata(pdev, pctrl); return 0; } +static int chv_pinctrl_remove(struct platform_device *pdev) +{ + struct chv_pinctrl *pctrl = platform_get_drvdata(pdev); + + acpi_remove_address_space_handler(ACPI_COMPANION(&pdev->dev), + pctrl->community->acpi_space_id, + chv_pinctrl_mmio_access_handler); + + return 0; +} + #ifdef CONFIG_PM_SLEEP static int chv_pinctrl_suspend_noirq(struct device *dev) { @@ -1758,6 +1804,7 @@ MODULE_DEVICE_TABLE(acpi, chv_pinctrl_acpi_match); static struct platform_driver chv_pinctrl_driver = { .probe = chv_pinctrl_probe, + .remove = chv_pinctrl_remove, .driver = { .name = "cherryview-pinctrl", .pm = &chv_pinctrl_pm_ops, |