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gpio-pch: modify gpio_nums and mask

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Currently, the number of GPIO pins is set fixed value(=12).
Also PIN MASK is set as '0xfff'.
However the pins differs by IOH.
This patch sets the value correctly.

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Tomoya MORINAGA 2011-07-21 09:19:57 +09:00 committed by Grant Likely
parent c3520a1a84
commit d4260e6ddd
1 changed files with 25 additions and 6 deletions
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31
drivers/gpio/gpio-pch.c
View file

@ -18,9 +18,6 @@
#include <linux/pci.h>
#include <linux/gpio.h>
#define PCH_GPIO_ALL_PINS 0xfff /* Mask for GPIO pins 0 to 11 */
#define GPIO_NUM_PINS 12 /* Specifies number of GPIO PINS GPIO0-GPIO11 */
struct pch_regs {
u32 ien;
u32 istatus;
@ -37,6 +34,19 @@ struct pch_regs {
u32 reset;
};
enum pch_type_t {
INTEL_EG20T_PCH,
OKISEMI_ML7223m_IOH, /* OKISEMI ML7223 IOH PCIe Bus-m */
OKISEMI_ML7223n_IOH /* OKISEMI ML7223 IOH PCIe Bus-n */
};
/* Specifies number of GPIO PINS */
static int gpio_pins[] = {
[INTEL_EG20T_PCH] = 12,
[OKISEMI_ML7223m_IOH] = 8,
[OKISEMI_ML7223n_IOH] = 8,
};
/**
* struct pch_gpio_reg_data - The register store data.
* @po_reg: To store contents of PO register.
@ -55,6 +65,7 @@ struct pch_gpio_reg_data {
* @gpio: Data for GPIO infrastructure.
* @pch_gpio_reg: Memory mapped Register data is saved here
* when suspend.
* @ioh: IOH ID
* @spinlock: Used for register access protection in
* interrupt context pch_irq_mask,
* pch_irq_unmask and pch_irq_type;
@ -66,6 +77,7 @@ struct pch_gpio {
struct gpio_chip gpio;
struct pch_gpio_reg_data pch_gpio_reg;
struct mutex lock;
enum pch_type_t ioh;
spinlock_t spinlock;
};
@ -100,7 +112,7 @@ static int pch_gpio_direction_output(struct gpio_chip *gpio, unsigned nr,
u32 reg_val;
mutex_lock(&chip->lock);
pm = ioread32(&chip->reg->pm) & PCH_GPIO_ALL_PINS;
pm = ioread32(&chip->reg->pm) & ((1 << gpio_pins[chip->ioh]) - 1);
pm |= (1 << nr);
iowrite32(pm, &chip->reg->pm);
@ -122,7 +134,7 @@ static int pch_gpio_direction_input(struct gpio_chip *gpio, unsigned nr)
u32 pm;
mutex_lock(&chip->lock);
pm = ioread32(&chip->reg->pm) & PCH_GPIO_ALL_PINS; /*bits 0-11*/
pm = ioread32(&chip->reg->pm) & ((1 << gpio_pins[chip->ioh]) - 1);
pm &= ~(1 << nr);
iowrite32(pm, &chip->reg->pm);
mutex_unlock(&chip->lock);
@ -162,7 +174,7 @@ static void pch_gpio_setup(struct pch_gpio *chip)
gpio->set = pch_gpio_set;
gpio->dbg_show = NULL;
gpio->base = -1;
gpio->ngpio = GPIO_NUM_PINS;
gpio->ngpio = gpio_pins[chip->ioh];
gpio->can_sleep = 0;
}
@ -196,6 +208,13 @@ static int __devinit pch_gpio_probe(struct pci_dev *pdev,
goto err_iomap;
}
if (pdev->device == 0x8803)
chip->ioh = INTEL_EG20T_PCH;
else if (pdev->device == 0x8014)
chip->ioh = OKISEMI_ML7223m_IOH;
else if (pdev->device == 0x8043)
chip->ioh = OKISEMI_ML7223n_IOH;
chip->reg = chip->base;
pci_set_drvdata(pdev, chip);
mutex_init(&chip->lock);