From ec689a8a8155ce8b966bd5d7737a3916f5e48be3 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Tue, 2 Sep 2014 13:45:21 +0300 Subject: mfd: lpc_sch: Add support for Intel Quark X1000 Intel Quark X1000 SoC supports IRQ based GPIO. This patch will enable MFD support for Quark X1000 and provide IRQ resources to Quark X1000 GPIO device driver. Signed-off-by: Chang Rebecca Swee Fun Tested-by: Chang Rebecca Swee Fun Signed-off-by: Andy Shevchenko Signed-off-by: Lee Jones --- drivers/mfd/lpc_sch.c | 37 +++++++++++++++++++++++++++++++------ 1 file changed, 31 insertions(+), 6 deletions(-) (limited to 'drivers/mfd/lpc_sch.c') diff --git a/drivers/mfd/lpc_sch.c b/drivers/mfd/lpc_sch.c index bde070a3a3c0..ae614b2aca7e 100644 --- a/drivers/mfd/lpc_sch.c +++ b/drivers/mfd/lpc_sch.c @@ -37,6 +37,9 @@ #define GPIO_IO_SIZE 64 #define GPIO_IO_SIZE_CENTERTON 128 +/* Intel Quark X1000 GPIO IRQ Number */ +#define GPIO_IRQ_QUARK_X1000 9 + #define WDTBASE 0x84 #define WDT_IO_SIZE 64 @@ -44,28 +47,37 @@ enum sch_chipsets { LPC_SCH = 0, /* Intel Poulsbo SCH */ LPC_ITC, /* Intel Tunnel Creek */ LPC_CENTERTON, /* Intel Centerton */ + LPC_QUARK_X1000, /* Intel Quark X1000 */ }; struct lpc_sch_info { unsigned int io_size_smbus; unsigned int io_size_gpio; unsigned int io_size_wdt; + int irq_gpio; }; static struct lpc_sch_info sch_chipset_info[] = { [LPC_SCH] = { .io_size_smbus = SMBUS_IO_SIZE, .io_size_gpio = GPIO_IO_SIZE, + .irq_gpio = -1, }, [LPC_ITC] = { .io_size_smbus = SMBUS_IO_SIZE, .io_size_gpio = GPIO_IO_SIZE, .io_size_wdt = WDT_IO_SIZE, + .irq_gpio = -1, }, [LPC_CENTERTON] = { .io_size_smbus = SMBUS_IO_SIZE, .io_size_gpio = GPIO_IO_SIZE_CENTERTON, .io_size_wdt = WDT_IO_SIZE, + .irq_gpio = -1, + }, + [LPC_QUARK_X1000] = { + .io_size_gpio = GPIO_IO_SIZE, + .irq_gpio = GPIO_IRQ_QUARK_X1000, }, }; @@ -73,6 +85,7 @@ static const struct pci_device_id lpc_sch_ids[] = { { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_SCH_LPC), LPC_SCH }, { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ITC_LPC), LPC_ITC }, { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CENTERTON_ILB), LPC_CENTERTON }, + { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_QUARK_X1000_ILB), LPC_QUARK_X1000 }, { 0, } }; MODULE_DEVICE_TABLE(pci, lpc_sch_ids); @@ -110,13 +123,13 @@ static int lpc_sch_get_io(struct pci_dev *pdev, int where, const char *name, } static int lpc_sch_populate_cell(struct pci_dev *pdev, int where, - const char *name, int size, int id, - struct mfd_cell *cell) + const char *name, int size, int irq, + int id, struct mfd_cell *cell) { struct resource *res; int ret; - res = devm_kzalloc(&pdev->dev, sizeof(*res), GFP_KERNEL); + res = devm_kcalloc(&pdev->dev, 2, sizeof(*res), GFP_KERNEL); if (!res) return -ENOMEM; @@ -132,6 +145,18 @@ static int lpc_sch_populate_cell(struct pci_dev *pdev, int where, cell->ignore_resource_conflicts = true; cell->id = id; + /* Check if we need to add an IRQ resource */ + if (irq < 0) + return 0; + + res++; + + res->start = irq; + res->end = irq; + res->flags = IORESOURCE_IRQ; + + cell->num_resources++; + return 0; } @@ -143,7 +168,7 @@ static int lpc_sch_probe(struct pci_dev *dev, const struct pci_device_id *id) int ret; ret = lpc_sch_populate_cell(dev, SMBASE, "isch_smbus", - info->io_size_smbus, + info->io_size_smbus, -1, id->device, &lpc_sch_cells[cells]); if (ret < 0) return ret; @@ -151,7 +176,7 @@ static int lpc_sch_probe(struct pci_dev *dev, const struct pci_device_id *id) cells++; ret = lpc_sch_populate_cell(dev, GPIOBASE, "sch_gpio", - info->io_size_gpio, + info->io_size_gpio, info->irq_gpio, id->device, &lpc_sch_cells[cells]); if (ret < 0) return ret; @@ -159,7 +184,7 @@ static int lpc_sch_probe(struct pci_dev *dev, const struct pci_device_id *id) cells++; ret = lpc_sch_populate_cell(dev, WDTBASE, "ie6xx_wdt", - info->io_size_wdt, + info->io_size_wdt, -1, id->device, &lpc_sch_cells[cells]); if (ret < 0) return ret; -- cgit v1.2.3