Merge tag 'rpi-2026.01-rc3' of https://source.denx.de/u-boot/custodians/u-boot-raspberrypi

Updates for RPi for 2026.01-rc4:

- rpi: Fix DRAM size reporting to show total RAM
- rpi: Use the U-Boot control FDT for fdt_addr
- pinctrl: bcm283x: Add GPIO pull-up/down control for BCM2835 and BCM2711
- rpi: Fix compilation with larger configs

1 files changed, 102 insertions, 3 deletions

diff --git a/drivers/pinctrl/broadcom/pinctrl-bcm283x.c b/drivers/pinctrl/broadcom/pinctrl-bcm283x.c
index cf9350c151e..4ecc8bac645 100644
--- a/drivers/pinctrl/broadcom/pinctrl-bcm283x.c
+++ b/drivers/pinctrl/broadcom/pinctrl-bcm283x.c
@@ -21,6 +21,8 @@
 #include <asm/system.h>
 #include <asm/io.h>
 #include <asm/gpio.h>
+#include <dt-bindings/pinctrl/bcm2835.h>
+#include <linux/delay.h>
 
 struct bcm283x_pinctrl_priv {
 	u32 *base_reg;
@@ -54,7 +56,66 @@ static int bcm2835_gpio_get_func_id(struct udevice *dev, unsigned int gpio)
 }
 
 /*
- * bcm283x_pinctrl_set_state: configure pin functions.
+ * bcm2835_gpio_set_pull: Set GPIO pull-up/down resistor for BCM2835
+ * @dev: the pinctrl device
+ * @gpio: the GPIO pin number
+ * @pull: pull setting (BCM2835_PUD_OFF, BCM2835_PUD_DOWN, BCM2835_PUD_UP)
+ */
+static void bcm2835_gpio_set_pull(struct udevice *dev, unsigned int gpio, int pull)
+{
+	struct bcm283x_pinctrl_priv *priv = dev_get_priv(dev);
+	u32 bank = BCM2835_GPPUDCLK0 + BCM2835_GPIO_COMMON_BANK(gpio);
+	u32 bit = BCM2835_GPIO_COMMON_SHIFT(gpio);
+
+	/* Set required control signal */
+	writel(pull & 0x3, &priv->base_reg[BCM2835_GPPUD]);
+	udelay(1);
+
+	/* Clock the control signal into the GPIO pads */
+	writel(1 << bit, &priv->base_reg[bank]);
+	udelay(1);
+
+	/* Remove the control signal and clock */
+	writel(0, &priv->base_reg[BCM2835_GPPUD]);
+	writel(0, &priv->base_reg[bank]);
+}
+
+/*
+ * bcm2711_gpio_set_pull: Set GPIO pull-up/down resistor for BCM2711
+ * @dev: the pinctrl device
+ * @gpio: the GPIO pin number
+ * @pull: pull setting (BCM2835_PUD_OFF, BCM2835_PUD_DOWN, BCM2835_PUD_UP)
+ */
+static void bcm2711_gpio_set_pull(struct udevice *dev, unsigned int gpio, int pull)
+{
+	struct bcm283x_pinctrl_priv *priv = dev_get_priv(dev);
+	u32 reg_offset;
+	u32 bit_shift;
+	u32 pull_bits;
+
+	/* Findout which GPIO_PUP_PDN_CNTRL register to use */
+	reg_offset = BCM2711_GPPUD_CNTRL_REG0 + BCM2711_PUD_REG_OFFSET(gpio);
+
+	/* Findout the bit position */
+	bit_shift = BCM2711_PUD_REG_SHIFT(gpio);
+
+	/* Update the 2-bit field for this GPIO */
+	pull_bits = pull & BCM2711_PUD_2711_MASK;
+	clrsetbits_le32(&priv->base_reg[reg_offset],
+			BCM2711_PUD_2711_MASK << bit_shift,
+			pull_bits << bit_shift);
+}
+
+static void bcm283x_gpio_set_pull(struct udevice *dev, unsigned int gpio, int pull)
+{
+	if (device_is_compatible(dev, "brcm,bcm2835-gpio"))
+		bcm2835_gpio_set_pull(dev, gpio, pull);
+	else
+		bcm2711_gpio_set_pull(dev, gpio, pull);
+}
+
+/*
+ * bcm283x_pinctrl_set_state: configure pin functions and pull states.
  * @dev: the pinctrl device to be configured.
  * @config: the state to be configured.
  * @return: 0 in success
@@ -62,8 +123,10 @@ static int bcm2835_gpio_get_func_id(struct udevice *dev, unsigned int gpio)
 int bcm283x_pinctrl_set_state(struct udevice *dev, struct udevice *config)
 {
 	u32 pin_arr[MAX_PINS_PER_BANK];
+	u32 pull_arr[MAX_PINS_PER_BANK];
 	int function;
-	int i, len, pin_count = 0;
+	int i, len, pin_count = 0, pull_len = 0, pull_count = 0;
+	int pull_value;
 
 	if (!dev_read_prop(config, "brcm,pins", &len) || !len ||
 	    len & 0x3 || dev_read_u32_array(config, "brcm,pins", pin_arr,
@@ -82,8 +145,44 @@ int bcm283x_pinctrl_set_state(struct udevice *dev, struct udevice *config)
 		return -EINVAL;
 	}
 
-	for (i = 0; i < pin_count; i++)
+	/* Check if brcm,pull property exists */
+	if (dev_read_prop(config, "brcm,pull", &pull_len) && pull_len > 0) {
+		if (pull_len & 0x3) {
+			debug("Invalid pull array length for pinconfig %s (%d)\n",
+			      config->name, pull_len);
+			return -EINVAL;
+		}
+
+		pull_count = pull_len / sizeof(u32);
+
+		if (pull_count != 1 && pull_count != pin_count) {
+			debug("Pull array count (%d) must be 1 or match pin count (%d) for pinconfig %s\n",
+			      pull_count, pin_count, config->name);
+			return -EINVAL;
+		}
+
+		if (dev_read_u32_array(config, "brcm,pull", pull_arr, pull_count)) {
+			debug("Failed reading pull array for pinconfig %s\n", config->name);
+			return -EINVAL;
+		}
+
+		/* Validate pull values */
+		for (i = 0; i < pull_count; i++) {
+			if (pull_arr[i] > 2) {
+				debug("Invalid pull value %d for pin %d in pinconfig %s\n",
+				      pull_arr[i], pin_arr[i], config->name);
+				return -EINVAL;
+			}
+		}
+	}
+
+	for (i = 0; i < pin_count; i++) {
 		bcm2835_gpio_set_func_id(dev, pin_arr[i], function);
+		if (pull_count > 0) {
+			pull_value = (pull_count == 1) ? pull_arr[0] : pull_arr[i];
+			bcm283x_gpio_set_pull(dev, pin_arr[i], pull_value);
+		}
+	}
 
 	return 0;
 }