| /kernel/linux/linux-4.19/drivers/pwm/ |
| D | Kconfig | 1 menuconfig PWM config
2 bool "Pulse-Width Modulation (PWM) Support"
4 Generic Pulse-Width Modulation (PWM) support.
13 This framework provides a generic interface to PWM devices
15 to register and unregister a PWM chip, an abstraction of a PWM
16 controller, that supports one or more PWM devices. Client
17 drivers can request PWM devices and use the generic framework
20 This generic framework replaces the legacy PWM framework which
29 if PWM
36 tristate "AB8500 PWM support"
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| D | core.c | 23 #include <linux/pwm.h>
33 #include <dt-bindings/pwm/pwm.h>
44 static struct pwm_device *pwm_to_device(unsigned int pwm) in pwm_to_device() argument
46 return radix_tree_lookup(&pwm_tree, pwm); in pwm_to_device()
49 static int alloc_pwms(int pwm, unsigned int count) in alloc_pwms() argument
54 if (pwm >= MAX_PWMS) in alloc_pwms()
57 if (pwm >= 0) in alloc_pwms()
58 from = pwm; in alloc_pwms()
63 if (pwm >= 0 && start != pwm) in alloc_pwms()
77 struct pwm_device *pwm = &chip->pwms[i]; in free_pwms() local
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| D | Makefile | 4 obj-$(CONFIG_PWM_AB8500) += pwm-ab8500.o
5 obj-$(CONFIG_PWM_ATMEL) += pwm-atmel.o
6 obj-$(CONFIG_PWM_ATMEL_HLCDC_PWM) += pwm-atmel-hlcdc.o
7 obj-$(CONFIG_PWM_ATMEL_TCB) += pwm-atmel-tcb.o
8 obj-$(CONFIG_PWM_BCM_IPROC) += pwm-bcm-iproc.o
9 obj-$(CONFIG_PWM_BCM_KONA) += pwm-bcm-kona.o
10 obj-$(CONFIG_PWM_BCM2835) += pwm-bcm2835.o
11 obj-$(CONFIG_PWM_BERLIN) += pwm-berlin.o
12 obj-$(CONFIG_PWM_BRCMSTB) += pwm-brcmstb.o
13 obj-$(CONFIG_PWM_CLPS711X) += pwm-clps711x.o
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| D | pwm-renesas-tpu.c | 2 * R-Mobile TPU PWM driver
26 #include <linux/pwm.h>
71 TPU_PIN_PWM, /* Pin is driven by PWM */
100 static void tpu_pwm_write(struct tpu_pwm_device *pwm, int reg_nr, u16 value) in tpu_pwm_write() argument
102 void __iomem *base = pwm->tpu->base + TPU_CHANNEL_OFFSET in tpu_pwm_write()
103 + pwm->channel * TPU_CHANNEL_SIZE; in tpu_pwm_write()
108 static void tpu_pwm_set_pin(struct tpu_pwm_device *pwm, in tpu_pwm_set_pin() argument
111 static const char * const states[] = { "inactive", "PWM", "active" }; in tpu_pwm_set_pin()
113 dev_dbg(&pwm->tpu->pdev->dev, "%u: configuring pin as %s\n", in tpu_pwm_set_pin()
114 pwm->channel, states[state]); in tpu_pwm_set_pin()
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| D | pwm-berlin.c | 2 * Marvell Berlin PWM driver
18 #include <linux/pwm.h>
72 static int berlin_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm) in berlin_pwm_request() argument
80 return pwm_set_chip_data(pwm, channel); in berlin_pwm_request()
83 static void berlin_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm) in berlin_pwm_free() argument
85 struct berlin_pwm_channel *channel = pwm_get_chip_data(pwm); in berlin_pwm_free()
93 struct berlin_pwm_chip *pwm = to_berlin_pwm_chip(chip); in berlin_pwm_config() local
98 cycles = clk_get_rate(pwm->clk); in berlin_pwm_config()
115 value = berlin_pwm_readl(pwm, pwm_dev->hwpwm, BERLIN_PWM_CONTROL); in berlin_pwm_config()
120 berlin_pwm_writel(pwm, pwm_dev->hwpwm, value, BERLIN_PWM_CONTROL); in berlin_pwm_config()
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| D | pwm-pxa.c | 2 * drivers/pwm/pwm-pxa.c
4 * simple driver for PWM (Pulse Width Modulator) controller
21 #include <linux/pwm.h>
29 /* PWM has_secondary_pwm? */
30 { "pxa25x-pwm", 0 },
31 { "pxa27x-pwm", HAS_SECONDARY_PWM },
32 { "pxa168-pwm", 0 },
33 { "pxa910-pwm", 0 },
38 /* PWM registers and bits definitions */
63 static int pxa_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, in pxa_pwm_config() argument
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| /kernel/linux/linux-5.10/drivers/pwm/ |
| D | Kconfig | 2 menuconfig PWM config
3 bool "Pulse-Width Modulation (PWM) Support"
5 Generic Pulse-Width Modulation (PWM) support.
14 This framework provides a generic interface to PWM devices
16 to register and unregister a PWM chip, an abstraction of a PWM
17 controller, that supports one or more PWM devices. Client
18 drivers can request PWM devices and use the generic framework
21 This generic framework replaces the legacy PWM framework which
30 if PWM
37 bool "PWM lowlevel drivers additional checks and debug messages"
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| D | core.c | 11 #include <linux/pwm.h>
21 #include <dt-bindings/pwm/pwm.h>
24 #include <trace/events/pwm.h>
35 static struct pwm_device *pwm_to_device(unsigned int pwm) in pwm_to_device() argument
37 return radix_tree_lookup(&pwm_tree, pwm); in pwm_to_device()
40 static int alloc_pwms(int pwm, unsigned int count) in alloc_pwms() argument
45 if (pwm >= MAX_PWMS) in alloc_pwms()
48 if (pwm >= 0) in alloc_pwms()
49 from = pwm; in alloc_pwms()
54 if (pwm >= 0 && start != pwm) in alloc_pwms()
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| D | Makefile | 4 obj-$(CONFIG_PWM_AB8500) += pwm-ab8500.o
5 obj-$(CONFIG_PWM_ATMEL) += pwm-atmel.o
6 obj-$(CONFIG_PWM_ATMEL_HLCDC_PWM) += pwm-atmel-hlcdc.o
7 obj-$(CONFIG_PWM_ATMEL_TCB) += pwm-atmel-tcb.o
8 obj-$(CONFIG_PWM_BCM_IPROC) += pwm-bcm-iproc.o
9 obj-$(CONFIG_PWM_BCM_KONA) += pwm-bcm-kona.o
10 obj-$(CONFIG_PWM_BCM2835) += pwm-bcm2835.o
11 obj-$(CONFIG_PWM_BERLIN) += pwm-berlin.o
12 obj-$(CONFIG_PWM_BRCMSTB) += pwm-brcmstb.o
13 obj-$(CONFIG_PWM_CLPS711X) += pwm-clps711x.o
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| D | pwm-renesas-tpu.c | 3 * R-Mobile TPU PWM driver
18 #include <linux/pwm.h>
63 TPU_PIN_PWM, /* Pin is driven by PWM */
92 static void tpu_pwm_write(struct tpu_pwm_device *pwm, int reg_nr, u16 value) in tpu_pwm_write() argument
94 void __iomem *base = pwm->tpu->base + TPU_CHANNEL_OFFSET in tpu_pwm_write()
95 + pwm->channel * TPU_CHANNEL_SIZE; in tpu_pwm_write()
100 static void tpu_pwm_set_pin(struct tpu_pwm_device *pwm, in tpu_pwm_set_pin() argument
103 static const char * const states[] = { "inactive", "PWM", "active" }; in tpu_pwm_set_pin()
105 dev_dbg(&pwm->tpu->pdev->dev, "%u: configuring pin as %s\n", in tpu_pwm_set_pin()
106 pwm->channel, states[state]); in tpu_pwm_set_pin()
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| D | pwm-berlin.c | 2 * Marvell Berlin PWM driver
18 #include <linux/pwm.h>
72 static int berlin_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm) in berlin_pwm_request() argument
80 return pwm_set_chip_data(pwm, channel); in berlin_pwm_request()
83 static void berlin_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm) in berlin_pwm_free() argument
85 struct berlin_pwm_channel *channel = pwm_get_chip_data(pwm); in berlin_pwm_free()
93 struct berlin_pwm_chip *pwm = to_berlin_pwm_chip(chip); in berlin_pwm_config() local
98 cycles = clk_get_rate(pwm->clk); in berlin_pwm_config()
115 value = berlin_pwm_readl(pwm, pwm_dev->hwpwm, BERLIN_PWM_CONTROL); in berlin_pwm_config()
120 berlin_pwm_writel(pwm, pwm_dev->hwpwm, value, BERLIN_PWM_CONTROL); in berlin_pwm_config()
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| D | pwm-pxa.c | 3 * drivers/pwm/pwm-pxa.c
5 * simple driver for PWM (Pulse Width Modulator) controller
18 #include <linux/pwm.h>
26 /* PWM has_secondary_pwm? */
27 { "pxa25x-pwm", 0 },
28 { "pxa27x-pwm", HAS_SECONDARY_PWM },
29 { "pxa168-pwm", 0 },
30 { "pxa910-pwm", 0 },
35 /* PWM registers and bits definitions */
60 static int pxa_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, in pxa_pwm_config() argument
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| /kernel/linux/linux-4.19/Documentation/devicetree/bindings/pwm/ |
| D | pwm.txt | 1 Specifying PWM information for devices
4 1) PWM user nodes
7 PWM users should specify a list of PWM devices that they want to use
8 with a property containing a 'pwm-list':
10 pwm-list ::= <single-pwm> [pwm-list]
11 single-pwm ::= <pwm-phandle> <pwm-specifier>
12 pwm-phandle : phandle to PWM controller node
13 pwm-specifier : array of #pwm-cells specifying the given PWM
16 PWM properties should be named "pwms". The exact meaning of each pwms
18 An optional property "pwm-names" may contain a list of strings to label
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| /kernel/linux/linux-4.19/include/linux/ |
| D | pwm.h | 15 * enum pwm_polarity - polarity of a PWM signal
29 * struct pwm_args - board-dependent PWM arguments
33 * This structure describes board-dependent arguments attached to a PWM
34 * device. These arguments are usually retrieved from the PWM lookup table or
37 * Do not confuse this with the PWM state: PWM arguments represent the initial
38 * configuration that users want to use on this PWM device rather than the
39 * current PWM hardware state.
52 * struct pwm_state - state of a PWM channel
53 * @period: PWM period (in nanoseconds)
54 * @duty_cycle: PWM duty cycle (in nanoseconds)
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| /kernel/linux/linux-5.10/include/linux/ |
| D | pwm.h | 15 * enum pwm_polarity - polarity of a PWM signal
29 * struct pwm_args - board-dependent PWM arguments
33 * This structure describes board-dependent arguments attached to a PWM
34 * device. These arguments are usually retrieved from the PWM lookup table or
37 * Do not confuse this with the PWM state: PWM arguments represent the initial
38 * configuration that users want to use on this PWM device rather than the
39 * current PWM hardware state.
52 * struct pwm_state - state of a PWM channel
53 * @period: PWM period (in nanoseconds)
54 * @duty_cycle: PWM duty cycle (in nanoseconds)
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| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/pwm/ |
| D | pwm.txt | 1 Specifying PWM information for devices
4 1) PWM user nodes
7 PWM users should specify a list of PWM devices that they want to use
8 with a property containing a 'pwm-list':
10 pwm-list ::= <single-pwm> [pwm-list]
11 single-pwm ::= <pwm-phandle> <pwm-specifier>
12 pwm-phandle : phandle to PWM controller node
13 pwm-specifier : array of #pwm-cells specifying the given PWM
16 PWM properties should be named "pwms". The exact meaning of each pwms
18 An optional property "pwm-names" may contain a list of strings to label
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| D | pwm-samsung.yaml | 4 $id: http://devicetree.org/schemas/pwm/pwm-samsung.yaml#
7 title: Samsung SoC PWM timers
14 Samsung SoCs contain PWM timer blocks which can be used for system clock source
15 and clock event timers, as well as to drive SoC outputs with PWM signal. Each
16 PWM timer block provides 5 PWM channels (not all of them can drive physical
24 - samsung,s3c2410-pwm # 16-bit, S3C24xx
25 - samsung,s3c6400-pwm # 32-bit, S3C64xx
26 - samsung,s5p6440-pwm # 32-bit, S5P64x0
27 - samsung,s5pc100-pwm # 32-bit, S5PC100, S5PV210, Exynos4210 rev0 SoCs
28 - samsung,exynos4210-pwm # 32-bit, Exynos
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| D | renesas,pwm-rcar.yaml | 4 $id: http://devicetree.org/schemas/pwm/renesas,pwm-rcar.yaml#
7 title: Renesas R-Car PWM Timer Controller
16 - renesas,pwm-r8a7742 # RZ/G1H
17 - renesas,pwm-r8a7743 # RZ/G1M
18 - renesas,pwm-r8a7744 # RZ/G1N
19 - renesas,pwm-r8a7745 # RZ/G1E
20 - renesas,pwm-r8a77470 # RZ/G1C
21 - renesas,pwm-r8a774a1 # RZ/G2M
22 - renesas,pwm-r8a774b1 # RZ/G2N
23 - renesas,pwm-r8a774c0 # RZ/G2E
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| D | imx-pwm.yaml | 4 $id: http://devicetree.org/schemas/pwm/imx-pwm.yaml#
7 title: Freescale i.MX PWM controller
13 "#pwm-cells":
15 Should be 2 for i.MX1 and 3 for i.MX27 and newer SoCs. See pwm.yaml
24 - fsl,imx1-pwm
25 - fsl,imx27-pwm
28 - fsl,imx25-pwm
29 - fsl,imx31-pwm
30 - fsl,imx50-pwm
31 - fsl,imx51-pwm
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| /kernel/linux/linux-4.19/drivers/clocksource/ |
| D | samsung_pwm_timer.c | 83 static struct samsung_pwm_clocksource pwm; variable
96 reg = readl(pwm.base + REG_TCFG0); in samsung_timer_set_prescale()
99 writel(reg, pwm.base + REG_TCFG0); in samsung_timer_set_prescale()
111 bits = (fls(divisor) - 1) - pwm.variant.div_base; in samsung_timer_set_divisor()
115 reg = readl(pwm.base + REG_TCFG1); in samsung_timer_set_divisor()
118 writel(reg, pwm.base + REG_TCFG1); in samsung_timer_set_divisor()
133 tcon = readl_relaxed(pwm.base + REG_TCON); in samsung_time_stop()
135 writel_relaxed(tcon, pwm.base + REG_TCON); in samsung_time_stop()
151 tcon = readl_relaxed(pwm.base + REG_TCON); in samsung_time_setup()
156 writel_relaxed(tcnt, pwm.base + REG_TCNTB(channel)); in samsung_time_setup()
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| /kernel/linux/linux-5.10/drivers/clocksource/ |
| D | samsung_pwm_timer.c | 80 static struct samsung_pwm_clocksource pwm; variable
93 reg = readl(pwm.base + REG_TCFG0); in samsung_timer_set_prescale()
96 writel(reg, pwm.base + REG_TCFG0); in samsung_timer_set_prescale()
108 bits = (fls(divisor) - 1) - pwm.variant.div_base; in samsung_timer_set_divisor()
112 reg = readl(pwm.base + REG_TCFG1); in samsung_timer_set_divisor()
115 writel(reg, pwm.base + REG_TCFG1); in samsung_timer_set_divisor()
130 tcon = readl_relaxed(pwm.base + REG_TCON); in samsung_time_stop()
132 writel_relaxed(tcon, pwm.base + REG_TCON); in samsung_time_stop()
148 tcon = readl_relaxed(pwm.base + REG_TCON); in samsung_time_setup()
153 writel_relaxed(tcnt, pwm.base + REG_TCNTB(channel)); in samsung_time_setup()
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| /kernel/linux/linux-4.19/Documentation/ |
| D | pwm.txt | 2 Pulse Width Modulation (PWM) interface
5 This provides an overview about the Linux PWM interface
9 the Linux PWM API (although they could). However, PWMs are often
12 this kind of flexibility the generic PWM API exists.
17 Users of the legacy PWM API use unique IDs to refer to PWM devices.
19 Instead of referring to a PWM device via its unique ID, board setup code
20 should instead register a static mapping that can be used to match PWM
24 PWM_LOOKUP("tegra-pwm", 0, "pwm-backlight", NULL,
38 Legacy users can request a PWM device using pwm_request() and free it
42 device or a consumer name. pwm_put() is used to free the PWM device. Managed
[all …]
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| /kernel/linux/linux-5.10/Documentation/driver-api/ |
| D | pwm.rst | 2 Pulse Width Modulation (PWM) interface
5 This provides an overview about the Linux PWM interface
9 the Linux PWM API (although they could). However, PWMs are often
12 this kind of flexibility the generic PWM API exists.
17 Users of the legacy PWM API use unique IDs to refer to PWM devices.
19 Instead of referring to a PWM device via its unique ID, board setup code
20 should instead register a static mapping that can be used to match PWM
24 PWM_LOOKUP("tegra-pwm", 0, "pwm-backlight", NULL,
38 Legacy users can request a PWM device using pwm_request() and free it
42 device or a consumer name. pwm_put() is used to free the PWM device. Managed
[all …]
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| /kernel/linux/linux-5.10/Documentation/ABI/testing/ |
| D | sysfs-class-pwm | 1 What: /sys/class/pwm/
6 The pwm/ class sub-directory belongs to the Generic PWM
7 Framework and provides a sysfs interface for using PWM
10 What: /sys/class/pwm/pwmchipN/
15 A /sys/class/pwm/pwmchipN directory is created for each
16 probed PWM controller/chip where N is the base of the
17 PWM chip.
19 What: /sys/class/pwm/pwmchipN/npwm
24 The number of PWM channels supported by the PWM chip.
26 What: /sys/class/pwm/pwmchipN/export
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| /kernel/linux/linux-4.19/Documentation/ABI/testing/ |
| D | sysfs-class-pwm | 1 What: /sys/class/pwm/
6 The pwm/ class sub-directory belongs to the Generic PWM
7 Framework and provides a sysfs interface for using PWM
10 What: /sys/class/pwm/pwmchipN/
15 A /sys/class/pwm/pwmchipN directory is created for each
16 probed PWM controller/chip where N is the base of the
17 PWM chip.
19 What: /sys/class/pwm/pwmchipN/npwm
24 The number of PWM channels supported by the PWM chip.
26 What: /sys/class/pwm/pwmchipN/export
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