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gpio: graniterapids: Fix incorrect BAR assignment

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Base Address of vGPIO MMIO register is provided directly by the BIOS
instead of using offsets. Update address assignment to reflect this
change in driver.

Cc: stable@vger.kernel.org
Signed-off-by: Alan Borzeszkowski <alan.borzeszkowski@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Andy Shevchenko <andy@kernel.org>
Link: https://lore.kernel.org/r/20241204070415.1034449-3-mika.westerberg@linux.intel.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Alan Borzeszkowski 2024-12-04 09:04:10 +02:00 committed by Bartosz Golaszewski
parent eb9640fd1c
commit 7382d2f0e8
1 changed files with 9 additions and 4 deletions
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13
drivers/gpio/gpio-graniterapids.c
View File

@ -32,7 +32,7 @@
#define GNR_PINS_PER_REG 32
#define GNR_NUM_REGS DIV_ROUND_UP(GNR_NUM_PINS, GNR_PINS_PER_REG)
#define GNR_CFG_BAR 0x00
#define GNR_CFG_PADBAR 0x00
#define GNR_CFG_LOCK_OFFSET 0x04
#define GNR_GPI_STATUS_OFFSET 0x20
#define GNR_GPI_ENABLE_OFFSET 0x24
@ -50,6 +50,7 @@
* struct gnr_gpio - Intel Granite Rapids-D vGPIO driver state
* @gc: GPIO controller interface
* @reg_base: base address of the GPIO registers
* @pad_base: base address of the vGPIO pad configuration registers
* @ro_bitmap: bitmap of read-only pins
* @lock: guard the registers
* @pad_backup: backup of the register state for suspend
@ -57,6 +58,7 @@
struct gnr_gpio {
struct gpio_chip gc;
void __iomem *reg_base;
void __iomem *pad_base;
DECLARE_BITMAP(ro_bitmap, GNR_NUM_PINS);
raw_spinlock_t lock;
u32 pad_backup[];
@ -65,7 +67,7 @@ struct gnr_gpio {
static void __iomem *gnr_gpio_get_padcfg_addr(const struct gnr_gpio *priv,
unsigned int gpio)
{
return priv->reg_base + gpio * sizeof(u32);
return priv->pad_base + gpio * sizeof(u32);
}
static int gnr_gpio_configure_line(struct gpio_chip *gc, unsigned int gpio,
@ -292,6 +294,7 @@ static int gnr_gpio_probe(struct platform_device *pdev)
struct gnr_gpio *priv;
void __iomem *regs;
int irq, ret;
u32 offset;
priv = devm_kzalloc(dev, struct_size(priv, pad_backup, num_backup_pins), GFP_KERNEL);
if (!priv)
@ -303,6 +306,10 @@ static int gnr_gpio_probe(struct platform_device *pdev)
if (IS_ERR(regs))
return PTR_ERR(regs);
priv->reg_base = regs;
offset = readl(priv->reg_base + GNR_CFG_PADBAR);
priv->pad_base = priv->reg_base + offset;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
@ -312,8 +319,6 @@ static int gnr_gpio_probe(struct platform_device *pdev)
if (ret)
return dev_err_probe(dev, ret, "failed to request interrupt\n");
priv->reg_base = regs + readl(regs + GNR_CFG_BAR);
gnr_gpio_init_pin_ro_bits(dev, priv->reg_base + GNR_CFG_LOCK_OFFSET,
priv->ro_bitmap);