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@@ -0,0 +1,250 @@
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+// SPDX-License-Identifier: GPL-2.0+
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+/*
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+ * Copyright (C) 2019 Philippe Reynes <philippe.reynes@softathome.com>
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+ *
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+ * based on:
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+ * drivers/led/led_bcm6328.c
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+ * drivers/led/led_bcm6358.c
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+ */
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+
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+#include <common.h>
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+#include <dm.h>
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+#include <errno.h>
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+#include <led.h>
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+#include <asm/io.h>
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+#include <dm/lists.h>
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+
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+#define LEDS_MAX 32
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+#define LEDS_WAIT 100
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+
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+/* LED Mode register */
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+#define LED_MODE_REG 0x0
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+#define LED_MODE_OFF 0
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+#define LED_MODE_ON 1
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+#define LED_MODE_MASK 1
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+
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+/* LED Controller Global settings register */
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+#define LED_CTRL_REG 0x00
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+#define LED_CTRL_MASK 0x1f
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+#define LED_CTRL_LED_TEST_MODE BIT(0)
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+#define LED_CTRL_SERIAL_LED_DATA_PPOL BIT(1)
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+#define LED_CTRL_SERIAL_LED_CLK_POL BIT(2)
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+#define LED_CTRL_SERIAL_LED_EN_POL BIT(3)
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+#define LED_CTRL_SERIAL_LED_MSB_FIRST BIT(4)
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+
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+/* LED Controller IP LED source select register */
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+#define LED_HW_LED_EN_REG 0x08
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+/* LED Flash control register0 */
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+#define LED_FLASH_RATE_CONTROL_REG0 0x10
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+/* Soft LED input register */
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+#define LED_SW_LED_IP_REG 0xb8
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+/* Soft LED input polarity register */
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+#define LED_SW_LED_IP_PPOL_REG 0xbc
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+
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+struct bcm6858_led_priv {
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+ void __iomem *regs;
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+ u8 pin;
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+};
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+
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+#ifdef CONFIG_LED_BLINK
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+/*
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+ * The value for flash rate are:
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+ * 0 : no blinking
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+ * 1 : rate is 25 Hz => 40 ms (period)
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+ * 2 : rate is 12.5 Hz => 80 ms (period)
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+ * 3 : rate is 6.25 Hz => 160 ms (period)
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+ * 4 : rate is 3.125 Hz => 320 ms (period)
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+ * 5 : rate is 1.5625 Hz => 640 ms (period)
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+ * 6 : rate is 0.7815 Hz => 1280 ms (period)
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+ * 7 : rate is 0.390625 Hz => 2560 ms (period)
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+ */
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+static const int bcm6858_flash_rate[8] = {
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+ 0, 40, 80, 160, 320, 640, 1280, 2560
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+};
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+
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+static u32 bcm6858_flash_rate_value(int period_ms)
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+{
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+ unsigned long value = 7;
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+ int i;
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+
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+ for (i = 0; i < ARRAY_SIZE(bcm6858_flash_rate); i++) {
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+ if (period_ms <= bcm6858_flash_rate[i]) {
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+ value = i;
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+ break;
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+ }
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+ }
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+
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+ return value;
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+}
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+
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+static int bcm6858_led_set_period(struct udevice *dev, int period_ms)
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+{
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+ struct bcm6858_led_priv *priv = dev_get_priv(dev);
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+ u32 offset, shift, mask, value;
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+
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+ offset = (priv->pin / 8) * 4;
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+ shift = (priv->pin % 8) * 4;
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+ mask = 0x7 << shift;
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+ value = bcm6858_flash_rate_value(period_ms) << shift;
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+
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+ clrbits_32(priv->regs + LED_FLASH_RATE_CONTROL_REG0 + offset, mask);
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+ setbits_32(priv->regs + LED_FLASH_RATE_CONTROL_REG0 + offset, value);
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+
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+ return 0;
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+}
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+#endif
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+
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+static enum led_state_t bcm6858_led_get_state(struct udevice *dev)
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+{
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+ struct bcm6858_led_priv *priv = dev_get_priv(dev);
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+ enum led_state_t state = LEDST_OFF;
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+ u32 sw_led_ip;
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+
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+ sw_led_ip = readl(priv->regs + LED_SW_LED_IP_REG);
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+ if (sw_led_ip & (1 << priv->pin))
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+ state = LEDST_ON;
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+
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+ return state;
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+}
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+
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+static int bcm6858_led_set_state(struct udevice *dev, enum led_state_t state)
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+{
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+ struct bcm6858_led_priv *priv = dev_get_priv(dev);
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+
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+ switch (state) {
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+ case LEDST_OFF:
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+ clrbits_32(priv->regs + LED_SW_LED_IP_REG, (1 << priv->pin));
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+#ifdef CONFIG_LED_BLINK
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+ bcm6858_led_set_period(dev, 0);
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+#endif
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+ break;
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+ case LEDST_ON:
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+ setbits_32(priv->regs + LED_SW_LED_IP_REG, (1 << priv->pin));
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+#ifdef CONFIG_LED_BLINK
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+ bcm6858_led_set_period(dev, 0);
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+#endif
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+ break;
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+ case LEDST_TOGGLE:
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+ if (bcm6858_led_get_state(dev) == LEDST_OFF)
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+ return bcm6858_led_set_state(dev, LEDST_ON);
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+ else
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+ return bcm6858_led_set_state(dev, LEDST_OFF);
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+ break;
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+#ifdef CONFIG_LED_BLINK
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+ case LEDST_BLINK:
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+ setbits_32(priv->regs + LED_SW_LED_IP_REG, (1 << priv->pin));
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+ break;
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+#endif
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+ default:
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+ return -EINVAL;
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+ }
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+
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+ return 0;
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+}
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+
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+static const struct led_ops bcm6858_led_ops = {
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+ .get_state = bcm6858_led_get_state,
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+ .set_state = bcm6858_led_set_state,
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+#ifdef CONFIG_LED_BLINK
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+ .set_period = bcm6858_led_set_period,
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+#endif
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+};
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+
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+static int bcm6858_led_probe(struct udevice *dev)
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+{
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+ struct led_uc_plat *uc_plat = dev_get_uclass_platdata(dev);
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+
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+ /* Top-level LED node */
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+ if (!uc_plat->label) {
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+ void __iomem *regs;
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+ u32 set_bits = 0;
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+
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+ regs = dev_remap_addr(dev);
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+ if (!regs)
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+ return -EINVAL;
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+
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+ if (dev_read_bool(dev, "brcm,serial-led-msb-first"))
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+ set_bits |= LED_CTRL_SERIAL_LED_MSB_FIRST;
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+ if (dev_read_bool(dev, "brcm,serial-led-en-pol"))
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+ set_bits |= LED_CTRL_SERIAL_LED_EN_POL;
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+ if (dev_read_bool(dev, "brcm,serial-led-clk-pol"))
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+ set_bits |= LED_CTRL_SERIAL_LED_CLK_POL;
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+ if (dev_read_bool(dev, "brcm,serial-led-data-ppol"))
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+ set_bits |= LED_CTRL_SERIAL_LED_DATA_PPOL;
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+ if (dev_read_bool(dev, "brcm,led-test-mode"))
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+ set_bits |= LED_CTRL_LED_TEST_MODE;
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+
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+ clrsetbits_32(regs + LED_CTRL_REG, ~0, set_bits);
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+ } else {
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+ struct bcm6858_led_priv *priv = dev_get_priv(dev);
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+ void __iomem *regs;
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+ unsigned int pin;
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+
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+ regs = dev_remap_addr(dev_get_parent(dev));
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+ if (!regs)
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+ return -EINVAL;
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+
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+ pin = dev_read_u32_default(dev, "reg", LEDS_MAX);
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+ if (pin >= LEDS_MAX)
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+ return -EINVAL;
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+
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+ priv->regs = regs;
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+ priv->pin = pin;
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+
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+ /* this led is managed by software */
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+ clrbits_32(regs + LED_HW_LED_EN_REG, 1 << pin);
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+
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+ /* configure the polarity */
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+ if (dev_read_bool(dev, "active-low"))
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+ clrbits_32(regs + LED_SW_LED_IP_PPOL_REG, 1 << pin);
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+ else
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+ setbits_32(regs + LED_SW_LED_IP_PPOL_REG, 1 << pin);
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+ }
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+
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+ return 0;
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+}
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+
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+static int bcm6858_led_bind(struct udevice *parent)
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+{
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+ ofnode node;
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+
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+ dev_for_each_subnode(node, parent) {
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+ struct led_uc_plat *uc_plat;
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+ struct udevice *dev;
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+ const char *label;
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+ int ret;
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+
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+ label = ofnode_read_string(node, "label");
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+ if (!label) {
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+ debug("%s: node %s has no label\n", __func__,
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+ ofnode_get_name(node));
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+ return -EINVAL;
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+ }
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+
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+ ret = device_bind_driver_to_node(parent, "bcm6858-led",
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+ ofnode_get_name(node),
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+ node, &dev);
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+ if (ret)
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+ return ret;
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+
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+ uc_plat = dev_get_uclass_platdata(dev);
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+ uc_plat->label = label;
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+ }
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+
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+ return 0;
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+}
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+
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+static const struct udevice_id bcm6858_led_ids[] = {
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+ { .compatible = "brcm,bcm6858-leds" },
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+ { /* sentinel */ }
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+};
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+
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+U_BOOT_DRIVER(bcm6858_led) = {
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+ .name = "bcm6858-led",
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+ .id = UCLASS_LED,
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+ .of_match = bcm6858_led_ids,
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+ .bind = bcm6858_led_bind,
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+ .probe = bcm6858_led_probe,
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+ .priv_auto_alloc_size = sizeof(struct bcm6858_led_priv),
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+ .ops = &bcm6858_led_ops,
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+};
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