video: tegra: drop prefix from file names
Dir name is enough.
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
diff --git a/drivers/video/tegra/dc-pwm-backlight.c b/drivers/video/tegra/dc-pwm-backlight.c
new file mode 100644
index 0000000..eff10b5
--- /dev/null
+++ b/drivers/video/tegra/dc-pwm-backlight.c
@@ -0,0 +1,150 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2022 Svyatoslav Ryhel <clamor95@gmail.com>
+ */
+
+#define LOG_CATEGORY UCLASS_PANEL_BACKLIGHT
+
+#include <backlight.h>
+#include <dm.h>
+#include <i2c.h>
+#include <log.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+
+#include <asm/io.h>
+#include <asm/gpio.h>
+
+#include "dc.h"
+
+#define TEGRA_PWM_BL_MIN_BRIGHTNESS 0x10
+#define TEGRA_PWM_BL_MAX_BRIGHTNESS 0xFF
+
+#define TEGRA_PWM_BL_PERIOD 0xFF
+#define TEGRA_PWM_BL_CLK_DIV 0x14
+#define TEGRA_PWM_BL_CLK_SELECT 0x00
+
+#define PM_PERIOD_SHIFT 18
+#define PM_CLK_DIVIDER_SHIFT 4
+
+#define TEGRA_PWM_PM0 0
+#define TEGRA_PWM_PM1 1
+
+struct tegra_pwm_backlight_priv {
+ struct dc_ctlr *dc; /* Display controller regmap */
+
+ u32 pwm_source;
+ u32 period;
+ u32 clk_div;
+ u32 clk_select;
+ u32 dft_brightness;
+};
+
+static int tegra_pwm_backlight_set_brightness(struct udevice *dev, int percent)
+{
+ struct tegra_pwm_backlight_priv *priv = dev_get_priv(dev);
+ struct dc_cmd_reg *cmd = &priv->dc->cmd;
+ struct dc_com_reg *com = &priv->dc->com;
+ unsigned int ctrl;
+ unsigned long out_sel;
+ unsigned long cmd_state;
+
+ if (percent == BACKLIGHT_DEFAULT)
+ percent = priv->dft_brightness;
+
+ if (percent < TEGRA_PWM_BL_MIN_BRIGHTNESS)
+ percent = TEGRA_PWM_BL_MIN_BRIGHTNESS;
+
+ if (percent > TEGRA_PWM_BL_MAX_BRIGHTNESS)
+ percent = TEGRA_PWM_BL_MAX_BRIGHTNESS;
+
+ ctrl = ((priv->period << PM_PERIOD_SHIFT) |
+ (priv->clk_div << PM_CLK_DIVIDER_SHIFT) |
+ priv->clk_select);
+
+ /* The new value should be effected immediately */
+ cmd_state = readl(&cmd->state_access);
+ writel((cmd_state | (1 << 2)), &cmd->state_access);
+
+ switch (priv->pwm_source) {
+ case TEGRA_PWM_PM0:
+ /* Select the LM0 on PM0 */
+ out_sel = readl(&com->pin_output_sel[5]);
+ out_sel &= ~(7 << 0);
+ out_sel |= (3 << 0);
+ writel(out_sel, &com->pin_output_sel[5]);
+ writel(ctrl, &com->pm0_ctrl);
+ writel(percent, &com->pm0_duty_cycle);
+ break;
+ case TEGRA_PWM_PM1:
+ /* Select the LM1 on PM1 */
+ out_sel = readl(&com->pin_output_sel[5]);
+ out_sel &= ~(7 << 4);
+ out_sel |= (3 << 4);
+ writel(out_sel, &com->pin_output_sel[5]);
+ writel(ctrl, &com->pm1_ctrl);
+ writel(percent, &com->pm1_duty_cycle);
+ break;
+ default:
+ break;
+ }
+
+ writel(cmd_state, &cmd->state_access);
+ return 0;
+}
+
+static int tegra_pwm_backlight_enable(struct udevice *dev)
+{
+ struct tegra_pwm_backlight_priv *priv = dev_get_priv(dev);
+
+ return tegra_pwm_backlight_set_brightness(dev, priv->dft_brightness);
+}
+
+static int tegra_pwm_backlight_probe(struct udevice *dev)
+{
+ struct tegra_pwm_backlight_priv *priv = dev_get_priv(dev);
+ ofnode dc = ofnode_get_parent(dev_ofnode(dev));
+
+ priv->dc = (struct dc_ctlr *)ofnode_get_addr(dc);
+ if (!priv->dc) {
+ log_err("%s: failed to get DC controller\n", __func__);
+ return -EINVAL;
+ }
+
+ priv->pwm_source =
+ dev_read_u32_default(dev, "nvidia,pwm-source",
+ TEGRA_PWM_PM0);
+ priv->period =
+ dev_read_u32_default(dev, "nvidia,period",
+ TEGRA_PWM_BL_PERIOD);
+ priv->clk_div =
+ dev_read_u32_default(dev, "nvidia,clock-div",
+ TEGRA_PWM_BL_CLK_DIV);
+ priv->clk_select =
+ dev_read_u32_default(dev, "nvidia,clock-select",
+ TEGRA_PWM_BL_CLK_SELECT);
+ priv->dft_brightness =
+ dev_read_u32_default(dev, "nvidia,default-brightness",
+ TEGRA_PWM_BL_MAX_BRIGHTNESS);
+
+ return 0;
+}
+
+static const struct backlight_ops tegra_pwm_backlight_ops = {
+ .enable = tegra_pwm_backlight_enable,
+ .set_brightness = tegra_pwm_backlight_set_brightness,
+};
+
+static const struct udevice_id tegra_pwm_backlight_ids[] = {
+ { .compatible = "nvidia,tegra-pwm-backlight" },
+ { }
+};
+
+U_BOOT_DRIVER(tegra_pwm_backlight) = {
+ .name = "tegra_pwm_backlight",
+ .id = UCLASS_PANEL_BACKLIGHT,
+ .of_match = tegra_pwm_backlight_ids,
+ .probe = tegra_pwm_backlight_probe,
+ .ops = &tegra_pwm_backlight_ops,
+ .priv_auto = sizeof(struct tegra_pwm_backlight_priv),
+};