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@@ -0,0 +1,298 @@
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+// SPDX-License-Identifier: GPL-2.0+
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+
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+/*
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+ * Copyright (C) 2020 Cortina-Access
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+ * Author: Jway Lin <jway.lin@cortina-access.com>
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+ *
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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 <log.h>
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+#include <asm/io.h>
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+#include <dm/lists.h>
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+#include <linux/bitops.h>
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+
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+#define LED_MAX_HW_BLINK 127
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+#define LED_MAX_COUNT 16
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+
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+/* LED_CONTROL fields */
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+#define LED_BLINK_RATE1_SHIFT 0
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+#define LED_BLINK_RATE1_MASK 0xff
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+#define LED_BLINK_RATE2_SHIFT 8
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+#define LED_BLINK_RATE2_MASK 0xff
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+#define LED_CLK_TEST BIT(16)
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+#define LED_CLK_POLARITY BIT(17)
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+#define LED_CLK_TEST_MODE BIT(16)
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+#define LED_CLK_TEST_RX_TEST BIT(30)
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+#define LED_CLK_TEST_TX_TEST BIT(31)
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+
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+/* LED_CONFIG fields */
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+#define LED_EVENT_ON_SHIFT 0
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+#define LED_EVENT_ON_MASK 0x7
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+#define LED_EVENT_BLINK_SHIFT 3
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+#define LED_EVENT_BLINK_MASK 0x7
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+#define LED_EVENT_OFF_SHIFT 6
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+#define LED_EVENT_OFF_MASK 0x7
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+#define LED_OFF_ON_SHIFT 9
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+#define LED_OFF_ON_MASK 0x3
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+#define LED_PORT_SHIFT 11
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+#define LED_PORT_MASK 0x7
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+#define LED_OFF_VAL BIT(14)
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+#define LED_SW_EVENT BIT(15)
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+#define LED_BLINK_SEL BIT(16)
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+
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+/* LED_CONFIG structures */
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+struct cortina_led_cfg {
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+ void __iomem *regs;
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+ u32 pin; /* LED pin nubmer */
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+ bool active_low; /*Active-High or Active-Low*/
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+ u32 off_event; /* set led off event (RX,TX,SW)*/
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+ u32 blink_event; /* set led blink event (RX,TX,SW)*/
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+ u32 on_event; /* set led on event (RX,TX,SW)*/
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+ u32 port; /* corresponding ethernet port */
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+ int blink_sel; /* select blink-rate1 or blink-rate2 */
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+};
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+
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+/* LED_control structures */
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+struct cortina_led_platdata {
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+ void __iomem *ctrl_regs;
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+ u16 rate1; /* blink rate setting 0 */
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+ u16 rate2; /* blink rate setting 1 */
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+};
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+
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+enum ca_led_state_t {
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+ CA_EVENT_MODE = 0,
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+ CA_LED_ON = 1,
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+ CA_LED_OFF,
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+};
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+
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+static void cortina_led_write(void __iomem *reg, unsigned long data)
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+{
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+ writel(data, reg);
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+}
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+
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+static unsigned long cortina_led_read(void __iomem *reg)
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+{
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+ return readl(reg);
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+}
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+
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+static enum led_state_t cortina_led_get_state(struct udevice *dev)
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+{
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+ struct cortina_led_cfg *priv = dev_get_priv(dev);
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+ enum led_state_t state = LEDST_OFF;
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+ u32 val;
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+
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+ val = readl(priv->regs);
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+
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+ if (val & LED_SW_EVENT)
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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 cortina_led_set_state(struct udevice *dev, enum led_state_t state)
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+{
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+ u32 val;
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+ struct cortina_led_cfg *priv = dev_get_priv(dev);
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+
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+ val = readl(priv->regs);
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+ val &= ~(LED_OFF_ON_MASK << LED_OFF_ON_SHIFT);
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+
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+ switch (state) {
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+ case LEDST_OFF:
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+ val &= ~LED_SW_EVENT;
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+ val |= CA_LED_OFF << LED_OFF_ON_SHIFT;
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+ cortina_led_write(priv->regs, val);
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+ break;
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+ case LEDST_ON:
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+ val |= LED_SW_EVENT;
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+ val |= CA_LED_ON << LED_OFF_ON_SHIFT;
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+ cortina_led_write(priv->regs, val);
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+ break;
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+ case LEDST_TOGGLE:
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+ if (cortina_led_get_state(dev) == LEDST_OFF)
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+ return cortina_led_set_state(dev, LEDST_ON);
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+ else
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+ return cortina_led_set_state(dev, LEDST_OFF);
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+ break;
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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 cortina_led_ops = {
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+ .get_state = cortina_led_get_state,
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+ .set_state = cortina_led_set_state,
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+};
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+
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+static int ca_led_ofdata_to_platdata(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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+ struct cortina_led_platdata *plt = dev_get_platdata(dev);
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+
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+ plt->rate1 =
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+ dev_read_u32_default(dev, "Cortina,blink-rate1", 256);
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+ plt->rate2 =
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+ dev_read_u32_default(dev, "Cortina,blink-rate2", 512);
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+ plt->ctrl_regs = dev_remap_addr(dev);
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+ } else {
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+ struct cortina_led_cfg *priv = dev_get_priv(dev);
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+
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+ priv->regs = dev_remap_addr(dev_get_parent(dev));
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+ priv->pin = dev_read_u32_default(dev, "pin", LED_MAX_COUNT);
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+ priv->blink_sel = dev_read_u32_default(dev, "blink-sel", 0);
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+ priv->off_event = dev_read_u32_default(dev, "off-event", 0);
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+ priv->blink_event = dev_read_u32_default(dev, "blink-event", 0);
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+ priv->on_event = dev_read_u32_default(dev, "on-event", 0);
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+ priv->port = dev_read_u32_default(dev, "port", 0);
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+
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+ if (dev_read_bool(dev, "active-low"))
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+ priv->active_low = true;
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+ else
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+ priv->active_low = false;
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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 cortina_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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+ struct cortina_led_platdata *platdata = dev_get_platdata(dev);
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+ u32 reg_value, val;
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+ u16 rate1, rate2;
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+
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+ if (!platdata->ctrl_regs)
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+ return -EINVAL;
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+
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+ reg_value = 0;
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+ reg_value |= LED_CLK_POLARITY;
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+
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+ rate1 = platdata->rate1;
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+ rate2 = platdata->rate2;
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+
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+ val = rate1 / 16 - 1;
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+ rate1 = val > LED_MAX_HW_BLINK ?
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+ LED_MAX_HW_BLINK : val;
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+ reg_value |= (rate1 & LED_BLINK_RATE1_MASK) <<
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+ LED_BLINK_RATE1_SHIFT;
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+
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+ val = rate2 / 16 - 1;
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+ rate2 = val > LED_MAX_HW_BLINK ?
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+ LED_MAX_HW_BLINK : val;
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+ reg_value |= (rate2 & LED_BLINK_RATE2_MASK) <<
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+ LED_BLINK_RATE2_SHIFT;
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+
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+ cortina_led_write(platdata->ctrl_regs, reg_value);
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+
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+ } else {
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+ struct cortina_led_cfg *priv = dev_get_priv(dev);
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+ void __iomem *regs;
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+ u32 val, port, off_event, blink_event, on_event;
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+
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+ regs = priv->regs;
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+ if (!regs)
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+ return -EINVAL;
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+
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+ if (priv->pin >= LED_MAX_COUNT)
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+ return -EINVAL;
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+
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+ priv->regs = regs + 4 + priv->pin * 4;
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+
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+ val = cortina_led_read(priv->regs);
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+
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+ if (priv->active_low)
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+ val |= LED_OFF_VAL;
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+ else
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+ val &= ~LED_OFF_VAL;
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+
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+ if (priv->blink_sel == 0)
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+ val &= ~LED_BLINK_SEL;
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+ else if (priv->blink_sel == 1)
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+ val |= LED_BLINK_SEL;
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+
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+ off_event = priv->off_event;
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+ val &= ~(LED_EVENT_OFF_MASK << LED_EVENT_OFF_SHIFT);
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+ if (off_event != 0)
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+ val |= BIT(off_event) << LED_EVENT_OFF_SHIFT;
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+
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+ blink_event = priv->blink_event;
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+ val &= ~(LED_EVENT_BLINK_MASK << LED_EVENT_BLINK_SHIFT);
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+ if (blink_event != 0)
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+ val |= BIT(blink_event) << LED_EVENT_BLINK_SHIFT;
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+
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+ on_event = priv->on_event;
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+ val &= ~(LED_EVENT_ON_MASK << LED_EVENT_ON_SHIFT);
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+ if (on_event != 0)
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+ val |= BIT(on_event) << LED_EVENT_ON_SHIFT;
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+
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+ port = priv->port;
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+ val &= ~(LED_PORT_MASK << LED_PORT_SHIFT);
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+ val |= port << LED_PORT_SHIFT;
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+
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+ /* force off */
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+ val &= ~(LED_OFF_ON_MASK << LED_OFF_ON_SHIFT);
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+ val |= CA_LED_OFF << LED_OFF_ON_SHIFT;
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+
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+ cortina_led_write(priv->regs, val);
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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 cortina_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, "ca-leds",
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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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+ 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 ca_led_ids[] = {
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+ { .compatible = "cortina,ca-leds" },
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+ { /* sentinel */ }
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+};
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+
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+U_BOOT_DRIVER(cortina_led) = {
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+ .name = "ca-leds",
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+ .id = UCLASS_LED,
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+ .of_match = ca_led_ids,
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+ .ofdata_to_platdata = ca_led_ofdata_to_platdata,
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+ .bind = cortina_led_bind,
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+ .probe = cortina_led_probe,
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+ .platdata_auto_alloc_size = sizeof(struct cortina_led_platdata),
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+ .priv_auto_alloc_size = sizeof(struct cortina_led_cfg),
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+ .ops = &cortina_led_ops,
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+};
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