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gpio: langwell: add Intel Merrifield support 

This patch implements a better way to handle multiple SoC's and adds
Intel Merrifield support to gpio-langwell.

It was based on previous work from Ning Li <ning.li@intel.com>

Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
Signed-off-by: Fei Yang <fei.yang@intel.com>
Signed-off-by: Ning Li <ning.li@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
hifive-unleashed-5.1
David Cohen 2013-10-04 13:01:40 -07:00 committed by Linus Walleij
parent 70b5341138
commit d56d6b3d7d
1 changed files with 82 additions and 11 deletions
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93
drivers/gpio/gpio-langwell.c
View File

@ -37,6 +37,9 @@
#include <linux/pm_runtime.h>
#include <linux/irqdomain.h>
#define LNW_IRQ_TYPE_EDGE (1 << 0)
#define LNW_IRQ_TYPE_LEVEL (1 << 1)
/*
* Langwell chip has 64 pins and thus there are 2 32bit registers to control
* each feature, while Penwell chip has 96 pins for each block, and need 3 32bit
@ -62,6 +65,16 @@ enum GPIO_REG {
GAFR, /* alt function */
};
/* langwell gpio driver data */
struct lnw_gpio_ddata {
u16 ngpio; /* number of gpio pins */
u32 gplr_offset; /* offset of first GPLR register from base */
u32 flis_base; /* base address of FLIS registers */
u32 flis_len; /* length of FLIS registers */
u32 (*get_flis_offset)(int gpio);
u32 chip_irq_type; /* chip interrupt type */
};
struct lnw_gpio {
struct gpio_chip chip;
void __iomem *reg_base;
@ -227,13 +240,71 @@ static struct irq_chip lnw_irqchip = {
.irq_set_type = lnw_irq_type,
};
static DEFINE_PCI_DEVICE_TABLE(lnw_gpio_ids) = { /* pin number */
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x080f), .driver_data = 64 },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x081f), .driver_data = 96 },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x081a), .driver_data = 96 },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x08eb), .driver_data = 96 },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x08f7), .driver_data = 96 },
{ 0, }
static const struct lnw_gpio_ddata gpio_lincroft = {
.ngpio = 64,
};
static const struct lnw_gpio_ddata gpio_penwell_aon = {
.ngpio = 96,
.chip_irq_type = LNW_IRQ_TYPE_EDGE,
};
static const struct lnw_gpio_ddata gpio_penwell_core = {
.ngpio = 96,
.chip_irq_type = LNW_IRQ_TYPE_EDGE,
};
static const struct lnw_gpio_ddata gpio_cloverview_aon = {
.ngpio = 96,
.chip_irq_type = LNW_IRQ_TYPE_EDGE | LNW_IRQ_TYPE_LEVEL,
};
static const struct lnw_gpio_ddata gpio_cloverview_core = {
.ngpio = 96,
.chip_irq_type = LNW_IRQ_TYPE_EDGE,
};
static const struct lnw_gpio_ddata gpio_tangier = {
.ngpio = 192,
.gplr_offset = 4,
.flis_base = 0xff0c0000,
.flis_len = 0x8000,
.get_flis_offset = NULL,
.chip_irq_type = LNW_IRQ_TYPE_EDGE,
};
static DEFINE_PCI_DEVICE_TABLE(lnw_gpio_ids) = {
{
/* Lincroft */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x080f),
.driver_data = (kernel_ulong_t)&gpio_lincroft,
},
{
/* Penwell AON */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x081f),
.driver_data = (kernel_ulong_t)&gpio_penwell_aon,
},
{
/* Penwell Core */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x081a),
.driver_data = (kernel_ulong_t)&gpio_penwell_core,
},
{
/* Cloverview Aon */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x08eb),
.driver_data = (kernel_ulong_t)&gpio_cloverview_aon,
},
{
/* Cloverview Core */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x08f7),
.driver_data = (kernel_ulong_t)&gpio_cloverview_core,
},
{
/* Tangier */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x1199),
.driver_data = (kernel_ulong_t)&gpio_tangier,
},
{ 0 }
};
MODULE_DEVICE_TABLE(pci, lnw_gpio_ids);
@ -316,7 +387,7 @@ static int lnw_gpio_probe(struct pci_dev *pdev,
u32 gpio_base;
u32 irq_base;
int retval;
int ngpio = id->driver_data;
struct lnw_gpio_ddata *ddata = (struct lnw_gpio_ddata *)id->driver_data;
retval = pcim_enable_device(pdev);
if (retval)
@ -351,14 +422,14 @@ static int lnw_gpio_probe(struct pci_dev *pdev,
lnw->chip.set = lnw_gpio_set;
lnw->chip.to_irq = lnw_gpio_to_irq;
lnw->chip.base = gpio_base;
lnw->chip.ngpio = ngpio;
lnw->chip.ngpio = ddata->ngpio;
lnw->chip.can_sleep = 0;
lnw->pdev = pdev;
spin_lock_init(&lnw->lock);
lnw->domain = irq_domain_add_simple(pdev->dev.of_node, ngpio, irq_base,
&lnw_gpio_irq_ops, lnw);
lnw->domain = irq_domain_add_simple(pdev->dev.of_node, ddata->ngpio,
irq_base, &lnw_gpio_irq_ops, lnw);
if (!lnw->domain)
return -ENOMEM;