Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / arm / include / asm / arch-tegra20 / pwm.h

diff --git a/qemu/roms/u-boot/arch/arm/include/asm/arch-tegra20/pwm.h b/qemu/roms/u-boot/arch/arm/include/asm/arch-tegra20/pwm.h
new file mode 100644 (file)
index 0000000..8e7397d
--- /dev/null
+++ b/qemu/roms/u-boot/arch/arm/include/asm/arch-tegra20/pwm.h
@@ -0,0 +1,60 @@
+/*
+ * Tegra pulse width frequency modulator definitions
+ *
+ * Copyright (c) 2011 The Chromium OS Authors.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#ifndef __ASM_ARCH_TEGRA_PWM_H
+#define __ASM_ARCH_TEGRA_PWM_H
+
+/* This is a single PWM channel */
+struct pwm_ctlr {
+       uint control;           /* Control register */
+       uint reserved[3];       /* Space space */
+};
+
+#define PWM_NUM_CHANNELS       4
+
+/* PWM_CONTROLLER_PWM_CSR_0/1/2/3_0 */
+#define PWM_ENABLE_SHIFT       31
+#define PWM_ENABLE_MASK        (0x1 << PWM_ENABLE_SHIFT)
+
+#define PWM_WIDTH_SHIFT        16
+#define PWM_WIDTH_MASK         (0x7FFF << PWM_WIDTH_SHIFT)
+
+#define PWM_DIVIDER_SHIFT      0
+#define PWM_DIVIDER_MASK       (0x1FFF << PWM_DIVIDER_SHIFT)
+
+/**
+ * Program the PWM with the given parameters.
+ *
+ * @param channel      PWM channel to update
+ * @param rate         Clock rate to use for PWM
+ * @param pulse_width  high pulse width: 0=always low, 1=1/256 pulse high,
+ *                     n = n/256 pulse high
+ * @param freq_divider frequency divider value (1 to use rate as is)
+ */
+void pwm_enable(unsigned channel, int rate, int pulse_width, int freq_divider);
+
+/**
+ * Request a pwm channel as referenced by a device tree node.
+ *
+ * This channel can then be passed to pwm_enable().
+ *
+ * @param blob         Device tree blob
+ * @param node         Node containing reference to pwm
+ * @param prop_name    Property name of pwm reference
+ * @return channel number, if ok, else -1
+ */
+int pwm_request(const void *blob, int node, const char *prop_name);
+
+/**
+ * Set up the pwm controller, by looking it up in the fdt.
+ *
+ * @return 0 if ok, -1 if the device tree node was not found or invalid.
+ */
+int pwm_init(const void *blob);
+
+#endif /* __ASM_ARCH_TEGRA_PWM_H */