[U-Boot] [PATCH v6 04/26] tegra: Move the pwm into tegra-common

Simon Glass
2015-04-15T03:03:22Z

This is needed for tegra124 also, so make it common and add a header file
for tegra124.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

Changes in v6: None
Changes in v4: None
Changes in v3: None
Changes in v2: None

arch/arm/include/asm/arch-tegra/pwm.h | 60 ++++++++++++++++++++++++++++++++
arch/arm/include/asm/arch-tegra124/pwm.h | 14 ++++++++
arch/arm/include/asm/arch-tegra20/pwm.h | 54 +++-------------------------
arch/arm/mach-tegra/Makefile | 1 +
arch/arm/mach-tegra/{tegra20 => }/pwm.c | 2 +-
arch/arm/mach-tegra/tegra20/Makefile | 1 -
6 files changed, 80 insertions(+), 52 deletions(-)
create mode 100644 arch/arm/include/asm/arch-tegra/pwm.h
create mode 100644 arch/arm/include/asm/arch-tegra124/pwm.h
rename arch/arm/mach-tegra/{tegra20 => }/pwm.c (97%)

diff --git a/arch/arm/include/asm/arch-tegra/pwm.h b/arch/arm/include/asm/arch-tegra/pwm.h
new file mode 100644
index 0000000..8e7397d
--- /dev/null
+++ b/arch/arm/include/asm/arch-tegra/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 */
diff --git a/arch/arm/include/asm/arch-tegra124/pwm.h b/arch/arm/include/asm/arch-tegra124/pwm.h
new file mode 100644
index 0000000..3d2c432
--- /dev/null
+++ b/arch/arm/include/asm/arch-tegra124/pwm.h
@@ -0,0 +1,14 @@
+/*
+ * Tegra pulse width frequency modulator definitions
+ *
+ * Copyright (c) 2011 The Chromium OS Authors.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __ASM_ARCH_TEGRA124_PWM_H
+#define __ASM_ARCH_TEGRA124_PWM_H
+
+#include <asm/arch-tegra/pwm.h>
+
+#endif /* __ASM_ARCH_TEGRA124_PWM_H */
diff --git a/arch/arm/include/asm/arch-tegra20/pwm.h b/arch/arm/include/asm/arch-tegra20/pwm.h
index 8e7397d..2207d9c 100644
--- a/arch/arm/include/asm/arch-tegra20/pwm.h
+++ b/arch/arm/include/asm/arch-tegra20/pwm.h
@@ -6,55 +6,9 @@
* SPDX-License-Identifier: GPL-2.0+
*/

-#ifndef __ASM_ARCH_TEGRA_PWM_H
-#define __ASM_ARCH_TEGRA_PWM_H
+#ifndef __ASM_ARCH_TEGRA20_PWM_H
+#define __ASM_ARCH_TEGRA20_PWM_H

-/* This is a single PWM channel */
-struct pwm_ctlr {
- uint control; /* Control register */
- uint reserved[3]; /* Space space */
-};
+#include <asm/arch-tegra/pwm.h>

-#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 */
+#endif /* __ASM_ARCH_TEGRA20_PWM_H */
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index 04cef0a..68eec5c 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -12,6 +12,7 @@ obj-y += spl.o
obj-y += cpu.o
else
obj-$(CONFIG_CMD_ENTERRCM) += cmd_enterrcm.o
+obj-$(CONFIG_PWM_TEGRA) += pwm.o
endif

obj-y += ap.o
diff --git a/arch/arm/mach-tegra/tegra20/pwm.c b/arch/arm/mach-tegra/pwm.c
similarity index 97%
rename from arch/arm/mach-tegra/tegra20/pwm.c
rename to arch/arm/mach-tegra/pwm.c
index 5b88636..8664200 100644
--- a/arch/arm/mach-tegra/tegra20/pwm.c
+++ b/arch/arm/mach-tegra/pwm.c
@@ -1,5 +1,5 @@
/*
- * Tegra2 pulse width frequency modulator definitions
+ * Tegra pulse width frequency modulator definitions
*
* Copyright (c) 2011 The Chromium OS Authors.
*
diff --git a/arch/arm/mach-tegra/tegra20/Makefile b/arch/arm/mach-tegra/tegra20/Makefile
index d48f9bb..fc3fb4a 100644
--- a/arch/arm/mach-tegra/tegra20/Makefile
+++ b/arch/arm/mach-tegra/tegra20/Makefile
@@ -7,7 +7,6 @@
ifdef CONFIG_SPL_BUILD
obj-y += cpu.o
else
-obj-$(CONFIG_PWM_TEGRA) += pwm.o
obj-$(CONFIG_VIDEO_TEGRA) += display.o
endif

--
2.2.0.rc0.207.ga3a616c