diff options
Diffstat (limited to 'drivers/gpio/gpio-merrifield.c')
| -rw-r--r-- | drivers/gpio/gpio-merrifield.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-merrifield.c b/drivers/gpio/gpio-merrifield.c new file mode 100644 index 0000000000..421d7e3a6c --- /dev/null +++ b/drivers/gpio/gpio-merrifield.c @@ -0,0 +1,144 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Intel Merrifield SoC GPIO driver + * + * Copyright (c) 2016, 2023 Intel Corporation. + * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com> + */ + +#include <linux/acpi.h> +#include <linux/bitops.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/types.h> + +#include "gpio-tangier.h" + +/* Intel Merrifield has 192 GPIO pins */ +#define MRFLD_NGPIO 192 + +static const struct tng_gpio_pinrange mrfld_gpio_ranges[] = { + GPIO_PINRANGE(0, 11, 146), + GPIO_PINRANGE(12, 13, 144), + GPIO_PINRANGE(14, 15, 35), + GPIO_PINRANGE(16, 16, 164), + GPIO_PINRANGE(17, 18, 105), + GPIO_PINRANGE(19, 22, 101), + GPIO_PINRANGE(23, 30, 107), + GPIO_PINRANGE(32, 43, 67), + GPIO_PINRANGE(44, 63, 195), + GPIO_PINRANGE(64, 67, 140), + GPIO_PINRANGE(68, 69, 165), + GPIO_PINRANGE(70, 71, 65), + GPIO_PINRANGE(72, 76, 228), + GPIO_PINRANGE(77, 86, 37), + GPIO_PINRANGE(87, 87, 48), + GPIO_PINRANGE(88, 88, 47), + GPIO_PINRANGE(89, 96, 49), + GPIO_PINRANGE(97, 97, 34), + GPIO_PINRANGE(102, 119, 83), + GPIO_PINRANGE(120, 123, 79), + GPIO_PINRANGE(124, 135, 115), + GPIO_PINRANGE(137, 142, 158), + GPIO_PINRANGE(154, 163, 24), + GPIO_PINRANGE(164, 176, 215), + GPIO_PINRANGE(177, 189, 127), + GPIO_PINRANGE(190, 191, 178), +}; + +static const char *mrfld_gpio_get_pinctrl_dev_name(struct tng_gpio *priv) +{ + struct device *dev = priv->dev; + struct acpi_device *adev; + const char *name; + + adev = acpi_dev_get_first_match_dev("INTC1002", NULL, -1); + if (adev) { + name = devm_kstrdup(dev, acpi_dev_name(adev), GFP_KERNEL); + acpi_dev_put(adev); + } else { + name = "pinctrl-merrifield"; + } + + return name; +} + +static int mrfld_gpio_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + struct device *dev = &pdev->dev; + struct tng_gpio *priv; + u32 gpio_base, irq_base; + void __iomem *base; + int retval; + + retval = pcim_enable_device(pdev); + if (retval) + return retval; + + retval = pcim_iomap_regions(pdev, BIT(1) | BIT(0), pci_name(pdev)); + if (retval) + return dev_err_probe(dev, retval, "I/O memory mapping error\n"); + + base = pcim_iomap_table(pdev)[1]; + + irq_base = readl(base + 0 * sizeof(u32)); + gpio_base = readl(base + 1 * sizeof(u32)); + + /* Release the IO mapping, since we already get the info from BAR1 */ + pcim_iounmap_regions(pdev, BIT(1)); + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->dev = dev; + priv->reg_base = pcim_iomap_table(pdev)[0]; + + priv->pin_info.pin_ranges = mrfld_gpio_ranges; + priv->pin_info.nranges = ARRAY_SIZE(mrfld_gpio_ranges); + priv->pin_info.name = mrfld_gpio_get_pinctrl_dev_name(priv); + if (!priv->pin_info.name) + return -ENOMEM; + + priv->info.base = gpio_base; + priv->info.ngpio = MRFLD_NGPIO; + priv->info.first = irq_base; + + retval = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES); + if (retval < 0) + return retval; + + priv->irq = pci_irq_vector(pdev, 0); + + priv->wake_regs.gwmr = GWMR_MRFLD; + priv->wake_regs.gwsr = GWSR_MRFLD; + priv->wake_regs.gsir = GSIR_MRFLD; + + retval = devm_tng_gpio_probe(dev, priv); + if (retval) + return dev_err_probe(dev, retval, "tng_gpio_probe error\n"); + + pci_set_drvdata(pdev, priv); + return 0; +} + +static const struct pci_device_id mrfld_gpio_ids[] = { + { PCI_VDEVICE(INTEL, 0x1199) }, + { } +}; +MODULE_DEVICE_TABLE(pci, mrfld_gpio_ids); + +static struct pci_driver mrfld_gpio_driver = { + .name = "gpio-merrifield", + .id_table = mrfld_gpio_ids, + .probe = mrfld_gpio_probe, +}; +module_pci_driver(mrfld_gpio_driver); + +MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); +MODULE_DESCRIPTION("Intel Merrifield SoC GPIO driver"); +MODULE_LICENSE("GPL v2"); +MODULE_IMPORT_NS(GPIO_TANGIER); |