diff options
| -rw-r--r-- | arch/arm/include/asm/arch-stm32/gpio.h | 3 | ||||
| -rw-r--r-- | arch/arm/mach-stm32mp/include/mach/gpio.h | 4 | ||||
| -rw-r--r-- | drivers/gpio/stm32f7_gpio.c | 99 |
3 files changed, 92 insertions, 14 deletions
diff --git a/arch/arm/include/asm/arch-stm32/gpio.h b/arch/arm/include/asm/arch-stm32/gpio.h index 84859b1447..8ba15b7355 100644 --- a/arch/arm/include/asm/arch-stm32/gpio.h +++ b/arch/arm/include/asm/arch-stm32/gpio.h @@ -109,6 +109,9 @@ struct stm32_gpio_regs { struct stm32_gpio_priv { struct stm32_gpio_regs *regs; + unsigned int gpio_range; }; +int stm32_offset_to_index(struct udevice *dev, unsigned int offset); + #endif /* _GPIO_H_ */ diff --git a/arch/arm/mach-stm32mp/include/mach/gpio.h b/arch/arm/mach-stm32mp/include/mach/gpio.h index 5151150b8d..46bef21f79 100644 --- a/arch/arm/mach-stm32mp/include/mach/gpio.h +++ b/arch/arm/mach-stm32mp/include/mach/gpio.h @@ -110,5 +110,9 @@ struct stm32_gpio_regs { struct stm32_gpio_priv { struct stm32_gpio_regs *regs; + unsigned int gpio_range; }; + +int stm32_offset_to_index(struct udevice *dev, unsigned int offset); + #endif /* _STM32_GPIO_H_ */ diff --git a/drivers/gpio/stm32f7_gpio.c b/drivers/gpio/stm32f7_gpio.c index a690c437eb..55553c9477 100644 --- a/drivers/gpio/stm32f7_gpio.c +++ b/drivers/gpio/stm32f7_gpio.c @@ -20,12 +20,41 @@ #define MODE_BITS_MASK 3 #define BSRR_BIT(gpio_pin, value) BIT(gpio_pin + (value ? 0 : 16)) +/* + * convert gpio offset to gpio index taking into account gpio holes + * into gpio bank + */ +int stm32_offset_to_index(struct udevice *dev, unsigned int offset) +{ + struct stm32_gpio_priv *priv = dev_get_priv(dev); + int idx = 0; + int i; + + for (i = 0; i < STM32_GPIOS_PER_BANK; i++) { + if (priv->gpio_range & BIT(i)) { + if (idx == offset) + return idx; + idx++; + } + } + /* shouldn't happen */ + return -EINVAL; +} + static int stm32_gpio_direction_input(struct udevice *dev, unsigned offset) { struct stm32_gpio_priv *priv = dev_get_priv(dev); struct stm32_gpio_regs *regs = priv->regs; - int bits_index = MODE_BITS(offset); - int mask = MODE_BITS_MASK << bits_index; + int bits_index; + int mask; + int idx; + + idx = stm32_offset_to_index(dev, offset); + if (idx < 0) + return idx; + + bits_index = MODE_BITS(idx); + mask = MODE_BITS_MASK << bits_index; clrsetbits_le32(®s->moder, mask, STM32_GPIO_MODE_IN << bits_index); @@ -37,12 +66,20 @@ static int stm32_gpio_direction_output(struct udevice *dev, unsigned offset, { struct stm32_gpio_priv *priv = dev_get_priv(dev); struct stm32_gpio_regs *regs = priv->regs; - int bits_index = MODE_BITS(offset); - int mask = MODE_BITS_MASK << bits_index; + int bits_index; + int mask; + int idx; + + idx = stm32_offset_to_index(dev, offset); + if (idx < 0) + return idx; + + bits_index = MODE_BITS(idx); + mask = MODE_BITS_MASK << bits_index; clrsetbits_le32(®s->moder, mask, STM32_GPIO_MODE_OUT << bits_index); - writel(BSRR_BIT(offset, value), ®s->bsrr); + writel(BSRR_BIT(idx, value), ®s->bsrr); return 0; } @@ -51,16 +88,26 @@ static int stm32_gpio_get_value(struct udevice *dev, unsigned offset) { struct stm32_gpio_priv *priv = dev_get_priv(dev); struct stm32_gpio_regs *regs = priv->regs; + int idx; + + idx = stm32_offset_to_index(dev, offset); + if (idx < 0) + return idx; - return readl(®s->idr) & BIT(offset) ? 1 : 0; + return readl(®s->idr) & BIT(idx) ? 1 : 0; } static int stm32_gpio_set_value(struct udevice *dev, unsigned offset, int value) { struct stm32_gpio_priv *priv = dev_get_priv(dev); struct stm32_gpio_regs *regs = priv->regs; + int idx; - writel(BSRR_BIT(offset, value), ®s->bsrr); + idx = stm32_offset_to_index(dev, offset); + if (idx < 0) + return idx; + + writel(BSRR_BIT(idx, value), ®s->bsrr); return 0; } @@ -69,10 +116,18 @@ static int stm32_gpio_get_function(struct udevice *dev, unsigned int offset) { struct stm32_gpio_priv *priv = dev_get_priv(dev); struct stm32_gpio_regs *regs = priv->regs; - int bits_index = MODE_BITS(offset); - int mask = MODE_BITS_MASK << bits_index; + int bits_index; + int mask; + int idx; u32 mode; + idx = stm32_offset_to_index(dev, offset); + if (idx < 0) + return idx; + + bits_index = MODE_BITS(idx); + mask = MODE_BITS_MASK << bits_index; + mode = (readl(®s->moder) & mask) >> bits_index; if (mode == STM32_GPIO_MODE_OUT) return GPIOF_OUTPUT; @@ -96,8 +151,11 @@ static int gpio_stm32_probe(struct udevice *dev) { struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); struct stm32_gpio_priv *priv = dev_get_priv(dev); + struct ofnode_phandle_args args; fdt_addr_t addr; const char *name; + int ret; + int i; addr = dev_read_addr(dev); if (addr == FDT_ADDR_T_NONE) @@ -108,14 +166,27 @@ static int gpio_stm32_probe(struct udevice *dev) if (!name) return -EINVAL; uc_priv->bank_name = name; - uc_priv->gpio_count = dev_read_u32_default(dev, "ngpios", - STM32_GPIOS_PER_BANK); - debug("%s, addr = 0x%p, bank_name = %s\n", __func__, (u32 *)priv->regs, - uc_priv->bank_name); + + i = 0; + ret = dev_read_phandle_with_args(dev, "gpio-ranges", + NULL, 3, i, &args); + + while (ret != -ENOENT) { + priv->gpio_range |= GENMASK(args.args[2] + args.args[0] - 1, + args.args[0]); + + uc_priv->gpio_count += args.args[2]; + + ret = dev_read_phandle_with_args(dev, "gpio-ranges", NULL, 3, + ++i, &args); + } + + dev_dbg(dev, "addr = 0x%p bank_name = %s gpio_count = %d gpio_range = 0x%x\n", + (u32 *)priv->regs, uc_priv->bank_name, uc_priv->gpio_count, + priv->gpio_range); #ifdef CONFIG_CLK struct clk clk; - int ret; ret = clk_get_by_index(dev, 0, &clk); if (ret < 0) return ret; |