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