diff --git a/Documentation/devicetree/bindings/pwm/bcm-kona-pwm.txt b/Documentation/devicetree/bindings/pwm/bcm-kona-pwm.txt
new file mode 100644
index 0000000000000000000000000000000000000000..8eae9fe7841cf8e9891000231297125fa13b13d6
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/bcm-kona-pwm.txt
@@ -0,0 +1,21 @@
+Broadcom Kona PWM controller device tree bindings
+
+This controller has 6 channels.
+
+Required Properties :
+- compatible: should contain "brcm,kona-pwm"
+- reg: physical base address and length of the controller's registers
+- clocks: phandle + clock specifier pair for the external clock
+- #pwm-cells: Should be 3. See pwm.txt in this directory for a
+ description of the cells format.
+
+Refer to clocks/clock-bindings.txt for generic clock consumer properties.
+
+Example:
+
+pwm: pwm@3e01a000 {
+ compatible = "brcm,bcm11351-pwm", "brcm,kona-pwm";
+ reg = <0x3e01a000 0xc4>;
+ clocks = <&pwm_clk>;
+ #pwm-cells = <3>;
+};
diff --git a/Documentation/pwm.txt b/Documentation/pwm.txt
index 93cb979749860f323bb797ce2adc2923d629e1ed..ca895fd211e4e9f5f6bd0fc6a13bf60d9a0c14b2 100644
--- a/Documentation/pwm.txt
+++ b/Documentation/pwm.txt
@@ -19,7 +19,8 @@ should instead register a static mapping that can be used to match PWM
consumers to providers, as given in the following example:
static struct pwm_lookup board_pwm_lookup[] = {
- PWM_LOOKUP("tegra-pwm", 0, "pwm-backlight", NULL),
+ PWM_LOOKUP("tegra-pwm", 0, "pwm-backlight", NULL,
+ 50000, PWM_POLARITY_NORMAL),
};
static void __init board_init(void)
@@ -97,6 +98,13 @@ pwm_chip as argument which provides a description of the PWM chip, the
number of PWM devices provided by the chip and the chip-specific
implementation of the supported PWM operations to the framework.
+When implementing polarity support in a PWM driver, make sure to respect the
+signal conventions in the PWM framework. By definition, normal polarity
+characterizes a signal starts high for the duration of the duty cycle and
+goes low for the remainder of the period. Conversely, a signal with inversed
+polarity starts low for the duration of the duty cycle and goes high for the
+remainder of the period.
+
Locking
-------
diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c
index 660bfc5a70d7e26edd82ebc2db1368ff3d91eeee..e2e52031f0565e09d4c815b6c0e9f026b5e13467 100644
--- a/arch/arm/mach-omap2/board-omap3beagle.c
+++ b/arch/arm/mach-omap2/board-omap3beagle.c
@@ -60,7 +60,8 @@
static struct pwm_lookup pwm_lookup[] = {
/* LEDB -> PMU_STAT */
- PWM_LOOKUP("twl-pwmled", 1, "leds_pwm", "beagleboard::pmu_stat"),
+ PWM_LOOKUP("twl-pwmled", 1, "leds_pwm", "beagleboard::pmu_stat",
+ 7812500, PWM_POLARITY_NORMAL),
};
static struct led_pwm pwm_leds[] = {
diff --git a/arch/arm/mach-pxa/hx4700.c b/arch/arm/mach-pxa/hx4700.c
index a7c30eb0c8db18aaffd429ec7e637a14a892ad81..c66ad4edc5e35e64512a03f999c69a24805566fa 100644
--- a/arch/arm/mach-pxa/hx4700.c
+++ b/arch/arm/mach-pxa/hx4700.c
@@ -574,7 +574,8 @@ static struct platform_device backlight = {
};
static struct pwm_lookup hx4700_pwm_lookup[] = {
- PWM_LOOKUP("pxa27x-pwm.1", 0, "pwm-backlight", NULL),
+ PWM_LOOKUP("pxa27x-pwm.1", 0, "pwm-backlight", NULL,
+ 30923, PWM_POLARITY_NORMAL),
};
/*
diff --git a/arch/arm/mach-shmobile/board-armadillo800eva.c b/arch/arm/mach-shmobile/board-armadillo800eva.c
index 01f81100c330e44db0364d37b442ea24d90f3040..30fcac73a540f84b8a47e00ac3fa2abc755b4d90 100644
--- a/arch/arm/mach-shmobile/board-armadillo800eva.c
+++ b/arch/arm/mach-shmobile/board-armadillo800eva.c
@@ -31,7 +31,7 @@
#include <linux/gpio_keys.h>
#include <linux/regulator/driver.h>
#include <linux/pinctrl/machine.h>
-#include <linux/platform_data/pwm-renesas-tpu.h>
+#include <linux/pwm.h>
#include <linux/pwm_backlight.h>
#include <linux/regulator/fixed.h>
#include <linux/regulator/gpio-regulator.h>
@@ -399,24 +399,16 @@ static struct resource pwm_resources[] = {
},
};
-static struct tpu_pwm_platform_data pwm_device_data = {
- .channels[2] = {
- .polarity = PWM_POLARITY_INVERSED,
- }
-};
-
static struct platform_device pwm_device = {
.name = "renesas-tpu-pwm",
.id = -1,
- .dev = {
- .platform_data = &pwm_device_data,
- },
.num_resources = ARRAY_SIZE(pwm_resources),
.resource = pwm_resources,
};
static struct pwm_lookup pwm_lookup[] = {
- PWM_LOOKUP("renesas-tpu-pwm", 2, "pwm-backlight.0", NULL),
+ PWM_LOOKUP("renesas-tpu-pwm", 2, "pwm-backlight.0", NULL,
+ 33333, PWM_POLARITY_INVERSED),
};
/* LCDC and backlight */
diff --git a/arch/arm/plat-samsung/dev-backlight.c b/arch/arm/plat-samsung/dev-backlight.c
index be4ad0b21c082abf990d00bec2f14d665672e78d..2157c5b539e6c9ad88baab1b41985b27f525042d 100644
--- a/arch/arm/plat-samsung/dev-backlight.c
+++ b/arch/arm/plat-samsung/dev-backlight.c
@@ -124,8 +124,6 @@ void __init samsung_bl_set(struct samsung_bl_gpio_info *gpio_info,
samsung_bl_data->pwm_period_ns = bl_data->pwm_period_ns;
if (bl_data->enable_gpio >= 0)
samsung_bl_data->enable_gpio = bl_data->enable_gpio;
- if (bl_data->enable_gpio_flags)
- samsung_bl_data->enable_gpio_flags = bl_data->enable_gpio_flags;
if (bl_data->init)
samsung_bl_data->init = bl_data->init;
if (bl_data->notify)
diff --git a/drivers/leds/leds-pwm.c b/drivers/leds/leds-pwm.c
index 7d0aaed1e23a881ab28997b09df13e372d538c36..aa770ec1e8928cc6b8f8eeaf9d6daea314e46d65 100644
--- a/drivers/leds/leds-pwm.c
+++ b/drivers/leds/leds-pwm.c
@@ -181,7 +181,6 @@ static int led_pwm_probe(struct platform_device *pdev)
led_dat->cdev.name = cur_led->name;
led_dat->cdev.default_trigger = cur_led->default_trigger;
led_dat->active_low = cur_led->active_low;
- led_dat->period = cur_led->pwm_period_ns;
led_dat->cdev.brightness_set = led_pwm_set;
led_dat->cdev.brightness = LED_OFF;
led_dat->cdev.max_brightness = cur_led->max_brightness;
@@ -191,6 +190,10 @@ static int led_pwm_probe(struct platform_device *pdev)
if (led_dat->can_sleep)
INIT_WORK(&led_dat->work, led_pwm_work);
+ led_dat->period = pwm_get_period(led_dat->pwm);
+ if (!led_dat->period && (cur_led->pwm_period_ns > 0))
+ led_dat->period = cur_led->pwm_period_ns;
+
ret = led_classdev_register(&pdev->dev, &led_dat->cdev);
if (ret < 0)
goto err;
diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
index 5b34ff29ea38042c84b19424ba3bc1826fab24a2..4ad7b89a4cb44c4ee200b79036750fcce267e674 100644
--- a/drivers/pwm/Kconfig
+++ b/drivers/pwm/Kconfig
@@ -62,6 +62,15 @@ config PWM_ATMEL_TCB
To compile this driver as a module, choose M here: the module
will be called pwm-atmel-tcb.
+config PWM_BCM_KONA
+ tristate "Kona PWM support"
+ depends on ARCH_BCM_MOBILE
+ help
+ Generic PWM framework driver for Broadcom Kona PWM block.
+
+ To compile this driver as a module, choose M here: the module
+ will be called pwm-bcm-kona.
+
config PWM_BFIN
tristate "Blackfin PWM support"
depends on BFIN_GPTIMERS
diff --git a/drivers/pwm/Makefile b/drivers/pwm/Makefile
index e57d2c38a79403902d4855295cfbf7c469510b7f..5c86a19d5d39c052adda3fecf3f05b69f7e17bc7 100644
--- a/drivers/pwm/Makefile
+++ b/drivers/pwm/Makefile
@@ -3,6 +3,7 @@ obj-$(CONFIG_PWM_SYSFS) += sysfs.o
obj-$(CONFIG_PWM_AB8500) += pwm-ab8500.o
obj-$(CONFIG_PWM_ATMEL) += pwm-atmel.o
obj-$(CONFIG_PWM_ATMEL_TCB) += pwm-atmel-tcb.o
+obj-$(CONFIG_PWM_BCM_KONA) += pwm-bcm-kona.o
obj-$(CONFIG_PWM_BFIN) += pwm-bfin.o
obj-$(CONFIG_PWM_CLPS711X) += pwm-clps711x.o
obj-$(CONFIG_PWM_EP93XX) += pwm-ep93xx.o
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index a80471399c20314edb69442bac0fe57cf06efec9..4b66bf09ee550fc391b8b22155dc4610ae649022 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -661,10 +661,16 @@ struct pwm_device *pwm_get(struct device *dev, const char *con_id)
}
}
+ mutex_unlock(&pwm_lookup_lock);
+
if (chip)
pwm = pwm_request_from_chip(chip, index, con_id ?: dev_id);
+ if (IS_ERR(pwm))
+ return pwm;
+
+ pwm_set_period(pwm, p->period);
+ pwm_set_polarity(pwm, p->polarity);
- mutex_unlock(&pwm_lookup_lock);
return pwm;
}
diff --git a/drivers/pwm/pwm-ab8500.c b/drivers/pwm/pwm-ab8500.c
index 1d07a6f9937541f46de1afc07962974498f69cdc..4c07a8420b373ddd4322e013a18b1fc7a5902f93 100644
--- a/drivers/pwm/pwm-ab8500.c
+++ b/drivers/pwm/pwm-ab8500.c
@@ -20,10 +20,6 @@
#define AB8500_PWM_OUT_CTRL2_REG 0x61
#define AB8500_PWM_OUT_CTRL7_REG 0x66
-/* backlight driver constants */
-#define ENABLE_PWM 1
-#define DISABLE_PWM 0
-
struct ab8500_pwm_chip {
struct pwm_chip chip;
};
@@ -64,7 +60,7 @@ static int ab8500_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
ret = abx500_mask_and_set_register_interruptible(chip->dev,
AB8500_MISC, AB8500_PWM_OUT_CTRL7_REG,
- 1 << (chip->base - 1), ENABLE_PWM);
+ 1 << (chip->base - 1), 1 << (chip->base - 1));
if (ret < 0)
dev_err(chip->dev, "%s: Failed to enable PWM, Error %d\n",
pwm->label, ret);
@@ -77,11 +73,10 @@ static void ab8500_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
ret = abx500_mask_and_set_register_interruptible(chip->dev,
AB8500_MISC, AB8500_PWM_OUT_CTRL7_REG,
- 1 << (chip->base - 1), DISABLE_PWM);
+ 1 << (chip->base - 1), 0);
if (ret < 0)
dev_err(chip->dev, "%s: Failed to disable PWM, Error %d\n",
pwm->label, ret);
- return;
}
static const struct pwm_ops ab8500_pwm_ops = {
@@ -101,10 +96,8 @@ static int ab8500_pwm_probe(struct platform_device *pdev)
* device which is required for ab8500 read and write
*/
ab8500 = devm_kzalloc(&pdev->dev, sizeof(*ab8500), GFP_KERNEL);
- if (ab8500 == NULL) {
- dev_err(&pdev->dev, "failed to allocate memory\n");
+ if (ab8500 == NULL)
return -ENOMEM;
- }
ab8500->chip.dev = &pdev->dev;
ab8500->chip.ops = &ab8500_pwm_ops;
diff --git a/drivers/pwm/pwm-atmel.c b/drivers/pwm/pwm-atmel.c
index 0adc952cc4ef5e95d8a5bd0fa0a680663150b7e8..6e700a541ca32ded0d5881842214a53d87ffe0f6 100644
--- a/drivers/pwm/pwm-atmel.c
+++ b/drivers/pwm/pwm-atmel.c
@@ -357,6 +357,7 @@ static int atmel_pwm_probe(struct platform_device *pdev)
atmel_pwm->chip.base = -1;
atmel_pwm->chip.npwm = 4;
+ atmel_pwm->chip.can_sleep = true;
atmel_pwm->config = data->config;
ret = pwmchip_add(&atmel_pwm->chip);
diff --git a/drivers/pwm/pwm-bcm-kona.c b/drivers/pwm/pwm-bcm-kona.c
new file mode 100644
index 0000000000000000000000000000000000000000..02bc048892a9f3cf4b50bb1499f6b9715311c74a
--- /dev/null
+++ b/drivers/pwm/pwm-bcm-kona.c
@@ -0,0 +1,318 @@
+/*
+ * Copyright (C) 2014 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/math64.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pwm.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+/*
+ * The Kona PWM has some unusual characteristics. Here are the main points.
+ *
+ * 1) There is no disable bit and the hardware docs advise programming a zero
+ * duty to achieve output equivalent to that of a normal disable operation.
+ *
+ * 2) Changes to prescale, duty, period, and polarity do not take effect until
+ * a subsequent rising edge of the trigger bit.
+ *
+ * 3) If the smooth bit and trigger bit are both low, the output is a constant
+ * high signal. Otherwise, the earlier waveform continues to be output.
+ *
+ * 4) If the smooth bit is set on the rising edge of the trigger bit, output
+ * will transition to the new settings on a period boundary (which could be
+ * seconds away). If the smooth bit is clear, new settings will be applied
+ * as soon as possible (the hardware always has a 400ns delay).
+ *
+ * 5) When the external clock that feeds the PWM is disabled, output is pegged
+ * high or low depending on its state at that exact instant.
+ */
+
+#define PWM_CONTROL_OFFSET (0x00000000)
+#define PWM_CONTROL_SMOOTH_SHIFT(chan) (24 + (chan))
+#define PWM_CONTROL_TYPE_SHIFT(chan) (16 + (chan))
+#define PWM_CONTROL_POLARITY_SHIFT(chan) (8 + (chan))
+#define PWM_CONTROL_TRIGGER_SHIFT(chan) (chan)
+
+#define PRESCALE_OFFSET (0x00000004)
+#define PRESCALE_SHIFT(chan) ((chan) << 2)
+#define PRESCALE_MASK(chan) (0x7 << PRESCALE_SHIFT(chan))
+#define PRESCALE_MIN (0x00000000)
+#define PRESCALE_MAX (0x00000007)
+
+#define PERIOD_COUNT_OFFSET(chan) (0x00000008 + ((chan) << 3))
+#define PERIOD_COUNT_MIN (0x00000002)
+#define PERIOD_COUNT_MAX (0x00ffffff)
+
+#define DUTY_CYCLE_HIGH_OFFSET(chan) (0x0000000c + ((chan) << 3))
+#define DUTY_CYCLE_HIGH_MIN (0x00000000)
+#define DUTY_CYCLE_HIGH_MAX (0x00ffffff)
+
+struct kona_pwmc {
+ struct pwm_chip chip;
+ void __iomem *base;
+ struct clk *clk;
+};
+
+static inline struct kona_pwmc *to_kona_pwmc(struct pwm_chip *_chip)
+{
+ return container_of(_chip, struct kona_pwmc, chip);
+}
+
+static void kona_pwmc_apply_settings(struct kona_pwmc *kp, unsigned int chan)
+{
+ unsigned int value = readl(kp->base + PWM_CONTROL_OFFSET);
+
+ /* Clear trigger bit but set smooth bit to maintain old output */
+ value |= 1 << PWM_CONTROL_SMOOTH_SHIFT(chan);
+ value &= ~(1 << PWM_CONTROL_TRIGGER_SHIFT(chan));
+ writel(value, kp->base + PWM_CONTROL_OFFSET);
+
+ /* Set trigger bit and clear smooth bit to apply new settings */
+ value &= ~(1 << PWM_CONTROL_SMOOTH_SHIFT(chan));
+ value |= 1 << PWM_CONTROL_TRIGGER_SHIFT(chan);
+ writel(value, kp->base + PWM_CONTROL_OFFSET);
+}
+
+static int kona_pwmc_config(struct pwm_chip *chip, struct pwm_device *pwm,
+ int duty_ns, int period_ns)
+{
+ struct kona_pwmc *kp = to_kona_pwmc(chip);
+ u64 val, div, rate;
+ unsigned long prescale = PRESCALE_MIN, pc, dc;
+ unsigned int value, chan = pwm->hwpwm;
+
+ /*
+ * Find period count, duty count and prescale to suit duty_ns and
+ * period_ns. This is done according to formulas described below:
+ *
+ * period_ns = 10^9 * (PRESCALE + 1) * PC / PWM_CLK_RATE
+ * duty_ns = 10^9 * (PRESCALE + 1) * DC / PWM_CLK_RATE
+ *
+ * PC = (PWM_CLK_RATE * period_ns) / (10^9 * (PRESCALE + 1))
+ * DC = (PWM_CLK_RATE * duty_ns) / (10^9 * (PRESCALE + 1))
+ */
+
+ rate = clk_get_rate(kp->clk);
+
+ while (1) {
+ div = 1000000000;
+ div *= 1 + prescale;
+ val = rate * period_ns;
+ pc = div64_u64(val, div);
+ val = rate * duty_ns;
+ dc = div64_u64(val, div);
+
+ /* If duty_ns or period_ns are not achievable then return */
+ if (pc < PERIOD_COUNT_MIN || dc < DUTY_CYCLE_HIGH_MIN)
+ return -EINVAL;
+
+ /* If pc and dc are in bounds, the calculation is done */
+ if (pc <= PERIOD_COUNT_MAX && dc <= DUTY_CYCLE_HIGH_MAX)
+ break;
+
+ /* Otherwise, increase prescale and recalculate pc and dc */
+ if (++prescale > PRESCALE_MAX)
+ return -EINVAL;
+ }
+
+ /* If the PWM channel is enabled, write the settings to the HW */
+ if (test_bit(PWMF_ENABLED, &pwm->flags)) {
+ value = readl(kp->base + PRESCALE_OFFSET);
+ value &= ~PRESCALE_MASK(chan);
+ value |= prescale << PRESCALE_SHIFT(chan);
+ writel(value, kp->base + PRESCALE_OFFSET);
+
+ writel(pc, kp->base + PERIOD_COUNT_OFFSET(chan));
+
+ writel(dc, kp->base + DUTY_CYCLE_HIGH_OFFSET(chan));
+
+ kona_pwmc_apply_settings(kp, chan);
+ }
+
+ return 0;
+}
+
+static int kona_pwmc_set_polarity(struct pwm_chip *chip, struct pwm_device *pwm,
+ enum pwm_polarity polarity)
+{
+ struct kona_pwmc *kp = to_kona_pwmc(chip);
+ unsigned int chan = pwm->hwpwm;
+ unsigned int value;
+ int ret;
+
+ ret = clk_prepare_enable(kp->clk);
+ if (ret < 0) {
+ dev_err(chip->dev, "failed to enable clock: %d\n", ret);
+ return ret;
+ }
+
+ value = readl(kp->base + PWM_CONTROL_OFFSET);
+
+ if (polarity == PWM_POLARITY_NORMAL)
+ value |= 1 << PWM_CONTROL_POLARITY_SHIFT(chan);
+ else
+ value &= ~(1 << PWM_CONTROL_POLARITY_SHIFT(chan));
+
+ writel(value, kp->base + PWM_CONTROL_OFFSET);
+
+ kona_pwmc_apply_settings(kp, chan);
+
+ /* Wait for waveform to settle before gating off the clock */
+ ndelay(400);
+
+ clk_disable_unprepare(kp->clk);
+
+ return 0;
+}
+
+static int kona_pwmc_enable(struct pwm_chip *chip, struct pwm_device *pwm)
+{
+ struct kona_pwmc *kp = to_kona_pwmc(chip);
+ int ret;
+
+ ret = clk_prepare_enable(kp->clk);
+ if (ret < 0) {
+ dev_err(chip->dev, "failed to enable clock: %d\n", ret);
+ return ret;
+ }
+
+ ret = kona_pwmc_config(chip, pwm, pwm->duty_cycle, pwm->period);
+ if (ret < 0) {
+ clk_disable_unprepare(kp->clk);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void kona_pwmc_disable(struct pwm_chip *chip, struct pwm_device *pwm)
+{
+ struct kona_pwmc *kp = to_kona_pwmc(chip);
+ unsigned int chan = pwm->hwpwm;
+
+ /* Simulate a disable by configuring for zero duty */
+ writel(0, kp->base + DUTY_CYCLE_HIGH_OFFSET(chan));
+ kona_pwmc_apply_settings(kp, chan);
+
+ /* Wait for waveform to settle before gating off the clock */
+ ndelay(400);
+
+ clk_disable_unprepare(kp->clk);
+}
+
+static const struct pwm_ops kona_pwm_ops = {
+ .config = kona_pwmc_config,
+ .set_polarity = kona_pwmc_set_polarity,
+ .enable = kona_pwmc_enable,
+ .disable = kona_pwmc_disable,
+ .owner = THIS_MODULE,
+};
+
+static int kona_pwmc_probe(struct platform_device *pdev)
+{
+ struct kona_pwmc *kp;
+ struct resource *res;
+ unsigned int chan;
+ unsigned int value = 0;
+ int ret = 0;
+
+ kp = devm_kzalloc(&pdev->dev, sizeof(*kp), GFP_KERNEL);
+ if (kp == NULL)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, kp);
+
+ kp->chip.dev = &pdev->dev;
+ kp->chip.ops = &kona_pwm_ops;
+ kp->chip.base = -1;
+ kp->chip.npwm = 6;
+ kp->chip.of_xlate = of_pwm_xlate_with_flags;
+ kp->chip.of_pwm_n_cells = 3;
+ kp->chip.can_sleep = true;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ kp->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(kp->base))
+ return PTR_ERR(kp->base);
+
+ kp->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(kp->clk)) {
+ dev_err(&pdev->dev, "failed to get clock: %ld\n",
+ PTR_ERR(kp->clk));
+ return PTR_ERR(kp->clk);
+ }
+
+ ret = clk_prepare_enable(kp->clk);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to enable clock: %d\n", ret);
+ return ret;
+ }
+
+ /* Set smooth mode, push/pull, and normal polarity for all channels */
+ for (chan = 0; chan < kp->chip.npwm; chan++) {
+ value |= (1 << PWM_CONTROL_SMOOTH_SHIFT(chan));
+ value |= (1 << PWM_CONTROL_TYPE_SHIFT(chan));
+ value |= (1 << PWM_CONTROL_POLARITY_SHIFT(chan));
+ }
+
+ writel(value, kp->base + PWM_CONTROL_OFFSET);
+
+ clk_disable_unprepare(kp->clk);
+
+ ret = pwmchip_add(&kp->chip);
+ if (ret < 0)
+ dev_err(&pdev->dev, "failed to add PWM chip: %d\n", ret);
+
+ return ret;
+}
+
+static int kona_pwmc_remove(struct platform_device *pdev)
+{
+ struct kona_pwmc *kp = platform_get_drvdata(pdev);
+ unsigned int chan;
+
+ for (chan = 0; chan < kp->chip.npwm; chan++)
+ if (test_bit(PWMF_ENABLED, &kp->chip.pwms[chan].flags))
+ clk_disable_unprepare(kp->clk);
+
+ return pwmchip_remove(&kp->chip);
+}
+
+static const struct of_device_id bcm_kona_pwmc_dt[] = {
+ { .compatible = "brcm,kona-pwm" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, bcm_kona_pwmc_dt);
+
+static struct platform_driver kona_pwmc_driver = {
+ .driver = {
+ .name = "bcm-kona-pwm",
+ .of_match_table = bcm_kona_pwmc_dt,
+ },
+ .probe = kona_pwmc_probe,
+ .remove = kona_pwmc_remove,
+};
+module_platform_driver(kona_pwmc_driver);
+
+MODULE_AUTHOR("Broadcom Corporation <bcm-kernel-feedback-list@broadcom.com>");
+MODULE_AUTHOR("Tim Kryger <tkryger@broadcom.com>");
+MODULE_DESCRIPTION("Broadcom Kona PWM driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/pwm/pwm-fsl-ftm.c b/drivers/pwm/pwm-fsl-ftm.c
index 420169e96b5f0b2532d3785dbef58739365bfe5b..a18bc8fea3853bf96671938ab021cb1d9c71f66b 100644
--- a/drivers/pwm/pwm-fsl-ftm.c
+++ b/drivers/pwm/pwm-fsl-ftm.c
@@ -454,6 +454,7 @@ static int fsl_pwm_probe(struct platform_device *pdev)
fpc->chip.of_pwm_n_cells = 3;
fpc->chip.base = -1;
fpc->chip.npwm = 8;
+ fpc->chip.can_sleep = true;
ret = pwmchip_add(&fpc->chip);
if (ret < 0) {
diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c
index cc477334487494fe014ba8993feb8c674fadad3f..d797c7b84c3feb4b23bd2c2d21651902eda6784f 100644
--- a/drivers/pwm/pwm-imx.c
+++ b/drivers/pwm/pwm-imx.c
@@ -241,10 +241,8 @@ static int imx_pwm_probe(struct platform_device *pdev)
return -ENODEV;
imx = devm_kzalloc(&pdev->dev, sizeof(*imx), GFP_KERNEL);
- if (imx == NULL) {
- dev_err(&pdev->dev, "failed to allocate memory\n");
+ if (imx == NULL)
return -ENOMEM;
- }
imx->clk_per = devm_clk_get(&pdev->dev, "per");
if (IS_ERR(imx->clk_per)) {
diff --git a/drivers/pwm/pwm-lp3943.c b/drivers/pwm/pwm-lp3943.c
index a40b9c34e9fffcd2bce08169cd7a256de067027f..2c39b0e50fa4a3eab0b48a6db8ddfdf3c7318e49 100644
--- a/drivers/pwm/pwm-lp3943.c
+++ b/drivers/pwm/pwm-lp3943.c
@@ -278,6 +278,7 @@ static int lp3943_pwm_probe(struct platform_device *pdev)
lp3943_pwm->chip.dev = &pdev->dev;
lp3943_pwm->chip.ops = &lp3943_pwm_ops;
lp3943_pwm->chip.npwm = LP3943_NUM_PWMS;
+ lp3943_pwm->chip.can_sleep = true;
platform_set_drvdata(pdev, lp3943_pwm);
diff --git a/drivers/pwm/pwm-lpss.c b/drivers/pwm/pwm-lpss.c
index 449e372050a0ed3953cf6b21aa4f905ea5ee7a7d..44ce6c6103ae4088abbb9382f6f69ac5ae4ff412 100644
--- a/drivers/pwm/pwm-lpss.c
+++ b/drivers/pwm/pwm-lpss.c
@@ -6,6 +6,7 @@
* Author: Chew Kean Ho <kean.ho.chew@intel.com>
* Author: Chang Rebecca Swee Fun <rebecca.swee.fun.chang@intel.com>
* Author: Chew Chiau Ee <chiau.ee.chew@intel.com>
+ * Author: Alan Cox <alan@linux.intel.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -19,6 +20,9 @@
#include <linux/module.h>
#include <linux/pwm.h>
#include <linux/platform_device.h>
+#include <linux/pci.h>
+
+static int pci_drv, plat_drv; /* So we know which drivers registered */
#define PWM 0x00000000
#define PWM_ENABLE BIT(31)
@@ -34,6 +38,16 @@ struct pwm_lpss_chip {
struct pwm_chip chip;
void __iomem *regs;
struct clk *clk;
+ unsigned long clk_rate;
+};
+
+struct pwm_lpss_boardinfo {
+ unsigned long clk_rate;
+};
+
+/* BayTrail */
+static const struct pwm_lpss_boardinfo byt_info = {
+ 25000000
};
static inline struct pwm_lpss_chip *to_lpwm(struct pwm_chip *chip)
@@ -55,7 +69,7 @@ static int pwm_lpss_config(struct pwm_chip *chip, struct pwm_device *pwm,
/* The equation is: base_unit = ((freq / c) * 65536) + correction */
base_unit = freq * 65536;
- c = clk_get_rate(lpwm->clk);
+ c = lpwm->clk_rate;
if (!c)
return -EINVAL;
@@ -113,52 +127,48 @@ static const struct pwm_ops pwm_lpss_ops = {
.owner = THIS_MODULE,
};
-static const struct acpi_device_id pwm_lpss_acpi_match[] = {
- { "80860F09", 0 },
- { },
-};
-MODULE_DEVICE_TABLE(acpi, pwm_lpss_acpi_match);
-
-static int pwm_lpss_probe(struct platform_device *pdev)
+static struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev,
+ struct resource *r,
+ const struct pwm_lpss_boardinfo *info)
{
struct pwm_lpss_chip *lpwm;
- struct resource *r;
int ret;
- lpwm = devm_kzalloc(&pdev->dev, sizeof(*lpwm), GFP_KERNEL);
+ lpwm = devm_kzalloc(dev, sizeof(*lpwm), GFP_KERNEL);
if (!lpwm)
- return -ENOMEM;
-
- r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ return ERR_PTR(-ENOMEM);
- lpwm->regs = devm_ioremap_resource(&pdev->dev, r);
+ lpwm->regs = devm_ioremap_resource(dev, r);
if (IS_ERR(lpwm->regs))
- return PTR_ERR(lpwm->regs);
-
- lpwm->clk = devm_clk_get(&pdev->dev, NULL);
- if (IS_ERR(lpwm->clk)) {
- dev_err(&pdev->dev, "failed to get PWM clock\n");
- return PTR_ERR(lpwm->clk);
+ return ERR_CAST(lpwm->regs);
+
+ if (info) {
+ lpwm->clk_rate = info->clk_rate;
+ } else {
+ lpwm->clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(lpwm->clk)) {
+ dev_err(dev, "failed to get PWM clock\n");
+ return ERR_CAST(lpwm->clk);
+ }
+ lpwm->clk_rate = clk_get_rate(lpwm->clk);
}
- lpwm->chip.dev = &pdev->dev;
+ lpwm->chip.dev = dev;
lpwm->chip.ops = &pwm_lpss_ops;
lpwm->chip.base = -1;
lpwm->chip.npwm = 1;
ret = pwmchip_add(&lpwm->chip);
if (ret) {
- dev_err(&pdev->dev, "failed to add PWM chip: %d\n", ret);
- return ret;
+ dev_err(dev, "failed to add PWM chip: %d\n", ret);
+ return ERR_PTR(ret);
}
- platform_set_drvdata(pdev, lpwm);
- return 0;
+ return lpwm;
}
-static int pwm_lpss_remove(struct platform_device *pdev)
+static int pwm_lpss_remove(struct pwm_lpss_chip *lpwm)
{
- struct pwm_lpss_chip *lpwm = platform_get_drvdata(pdev);
u32 ctrl;
ctrl = readl(lpwm->regs + PWM);
@@ -167,15 +177,104 @@ static int pwm_lpss_remove(struct platform_device *pdev)
return pwmchip_remove(&lpwm->chip);
}
-static struct platform_driver pwm_lpss_driver = {
+static int pwm_lpss_probe_pci(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ const struct pwm_lpss_boardinfo *info;
+ struct pwm_lpss_chip *lpwm;
+ int err;
+
+ err = pci_enable_device(pdev);
+ if (err < 0)
+ return err;
+
+ info = (struct pwm_lpss_boardinfo *)id->driver_data;
+ lpwm = pwm_lpss_probe(&pdev->dev, &pdev->resource[0], info);
+ if (IS_ERR(lpwm))
+ return PTR_ERR(lpwm);
+
+ pci_set_drvdata(pdev, lpwm);
+ return 0;
+}
+
+static void pwm_lpss_remove_pci(struct pci_dev *pdev)
+{
+ struct pwm_lpss_chip *lpwm = pci_get_drvdata(pdev);
+
+ pwm_lpss_remove(lpwm);
+ pci_disable_device(pdev);
+}
+
+static struct pci_device_id pwm_lpss_pci_ids[] = {
+ { PCI_VDEVICE(INTEL, 0x0f08), (unsigned long)&byt_info},
+ { PCI_VDEVICE(INTEL, 0x0f09), (unsigned long)&byt_info},
+ { },
+};
+MODULE_DEVICE_TABLE(pci, pwm_lpss_pci_ids);
+
+static struct pci_driver pwm_lpss_driver_pci = {
+ .name = "pwm-lpss",
+ .id_table = pwm_lpss_pci_ids,
+ .probe = pwm_lpss_probe_pci,
+ .remove = pwm_lpss_remove_pci,
+};
+
+static int pwm_lpss_probe_platform(struct platform_device *pdev)
+{
+ struct pwm_lpss_chip *lpwm;
+ struct resource *r;
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ lpwm = pwm_lpss_probe(&pdev->dev, r, NULL);
+ if (IS_ERR(lpwm))
+ return PTR_ERR(lpwm);
+
+ platform_set_drvdata(pdev, lpwm);
+ return 0;
+}
+
+static int pwm_lpss_remove_platform(struct platform_device *pdev)
+{
+ struct pwm_lpss_chip *lpwm = platform_get_drvdata(pdev);
+
+ return pwm_lpss_remove(lpwm);
+}
+
+static const struct acpi_device_id pwm_lpss_acpi_match[] = {
+ { "80860F09", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, pwm_lpss_acpi_match);
+
+static struct platform_driver pwm_lpss_driver_platform = {
.driver = {
.name = "pwm-lpss",
.acpi_match_table = pwm_lpss_acpi_match,
},
- .probe = pwm_lpss_probe,
- .remove = pwm_lpss_remove,
+ .probe = pwm_lpss_probe_platform,
+ .remove = pwm_lpss_remove_platform,
};
-module_platform_driver(pwm_lpss_driver);
+
+static int __init pwm_init(void)
+{
+ pci_drv = pci_register_driver(&pwm_lpss_driver_pci);
+ plat_drv = platform_driver_register(&pwm_lpss_driver_platform);
+ if (pci_drv && plat_drv)
+ return pci_drv;
+
+ return 0;
+}
+module_init(pwm_init);
+
+static void __exit pwm_exit(void)
+{
+ if (!pci_drv)
+ pci_unregister_driver(&pwm_lpss_driver_pci);
+ if (!plat_drv)
+ platform_driver_unregister(&pwm_lpss_driver_platform);
+}
+module_exit(pwm_exit);
MODULE_DESCRIPTION("PWM driver for Intel LPSS");
MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
diff --git a/drivers/pwm/pwm-mxs.c b/drivers/pwm/pwm-mxs.c
index 9475bc7a6f97ded7ec293881151747073c198ff3..4f1bb4e0a426ee5dee75d5cd91d1ae93d5bc3a2c 100644
--- a/drivers/pwm/pwm-mxs.c
+++ b/drivers/pwm/pwm-mxs.c
@@ -147,6 +147,7 @@ static int mxs_pwm_probe(struct platform_device *pdev)
mxs->chip.dev = &pdev->dev;
mxs->chip.ops = &mxs_pwm_ops;
mxs->chip.base = -1;
+ mxs->chip.can_sleep = true;
ret = of_property_read_u32(np, "fsl,pwm-number", &mxs->chip.npwm);
if (ret < 0) {
dev_err(&pdev->dev, "failed to get pwm number: %d\n", ret);
diff --git a/drivers/pwm/pwm-pxa.c b/drivers/pwm/pwm-pxa.c
index cd356d8702441169773d030494a4c41c42dc7702..0b312ec420b6920b34cf3cb236a0f20c16c3f502 100644
--- a/drivers/pwm/pwm-pxa.c
+++ b/drivers/pwm/pwm-pxa.c
@@ -179,10 +179,8 @@ static int pwm_probe(struct platform_device *pdev)
return -EINVAL;
pwm = devm_kzalloc(&pdev->dev, sizeof(*pwm), GFP_KERNEL);
- if (pwm == NULL) {
- dev_err(&pdev->dev, "failed to allocate memory\n");
+ if (pwm == NULL)
return -ENOMEM;
- }
pwm->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(pwm->clk))
diff --git a/drivers/pwm/pwm-renesas-tpu.c b/drivers/pwm/pwm-renesas-tpu.c
index aff6ba9b49e7b4b3bac9d566af39f01c6136b6bb..3b71b42e89d505cf5120f87d173f7e78f05e6550 100644
--- a/drivers/pwm/pwm-renesas-tpu.c
+++ b/drivers/pwm/pwm-renesas-tpu.c
@@ -21,13 +21,14 @@
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
-#include <linux/platform_data/pwm-renesas-tpu.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/pwm.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
+#define TPU_CHANNEL_MAX 4
+
#define TPU_TSTR 0x00 /* Timer start register (shared) */
#define TPU_TCRn 0x00 /* Timer control register */
@@ -87,7 +88,6 @@ struct tpu_pwm_device {
struct tpu_device {
struct platform_device *pdev;
- enum pwm_polarity polarities[TPU_CHANNEL_MAX];
struct pwm_chip chip;
spinlock_t lock;
@@ -229,7 +229,7 @@ static int tpu_pwm_request(struct pwm_chip *chip, struct pwm_device *_pwm)
pwm->tpu = tpu;
pwm->channel = _pwm->hwpwm;
- pwm->polarity = tpu->polarities[pwm->channel];
+ pwm->polarity = PWM_POLARITY_NORMAL;
pwm->prescaler = 0;
pwm->period = 0;
pwm->duty = 0;
@@ -388,16 +388,6 @@ static const struct pwm_ops tpu_pwm_ops = {
* Probe and remove
*/
-static void tpu_parse_pdata(struct tpu_device *tpu)
-{
- struct tpu_pwm_platform_data *pdata = tpu->pdev->dev.platform_data;
- unsigned int i;
-
- for (i = 0; i < ARRAY_SIZE(tpu->polarities); ++i)
- tpu->polarities[i] = pdata ? pdata->channels[i].polarity
- : PWM_POLARITY_NORMAL;
-}
-
static int tpu_probe(struct platform_device *pdev)
{
struct tpu_device *tpu;
@@ -405,17 +395,12 @@ static int tpu_probe(struct platform_device *pdev)
int ret;
tpu = devm_kzalloc(&pdev->dev, sizeof(*tpu), GFP_KERNEL);
- if (tpu == NULL) {
- dev_err(&pdev->dev, "failed to allocate driver data\n");
+ if (tpu == NULL)
return -ENOMEM;
- }
spin_lock_init(&tpu->lock);
tpu->pdev = pdev;
- /* Initialize device configuration from platform data. */
- tpu_parse_pdata(tpu);
-
/* Map memory, get clock and pin control. */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
tpu->base = devm_ioremap_resource(&pdev->dev, res);
diff --git a/drivers/pwm/pwm-samsung.c b/drivers/pwm/pwm-samsung.c
index d66529a995a193cc28057957ce408ba9daf124cb..ba6b650cf8dc166cf529e067b3b4844691e0cfd1 100644
--- a/drivers/pwm/pwm-samsung.c
+++ b/drivers/pwm/pwm-samsung.c
@@ -335,9 +335,6 @@ static int pwm_samsung_config(struct pwm_chip *chip, struct pwm_device *pwm,
writel(tcnt, our_chip->base + REG_TCNTB(pwm->hwpwm));
writel(tcmp, our_chip->base + REG_TCMPB(pwm->hwpwm));
- if (test_bit(PWMF_ENABLED, &pwm->flags))
- pwm_samsung_enable(chip, pwm);
-
chan->period_ns = period_ns;
chan->tin_ns = tin_ns;
chan->duty_ns = duty_ns;
diff --git a/drivers/pwm/pwm-spear.c b/drivers/pwm/pwm-spear.c
index cb2d4f0f97114b30cfa04cf29daf13dccf8cc3a7..6fd93e6a4122b0a6e021b60cf8ca792e5054d889 100644
--- a/drivers/pwm/pwm-spear.c
+++ b/drivers/pwm/pwm-spear.c
@@ -179,10 +179,8 @@ static int spear_pwm_probe(struct platform_device *pdev)
u32 val;
pc = devm_kzalloc(&pdev->dev, sizeof(*pc), GFP_KERNEL);
- if (!pc) {
- dev_err(&pdev->dev, "failed to allocate memory\n");
+ if (!pc)
return -ENOMEM;
- }
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
pc->mmio_base = devm_ioremap_resource(&pdev->dev, r);
@@ -222,7 +220,7 @@ static int spear_pwm_probe(struct platform_device *pdev)
}
ret = pwmchip_add(&pc->chip);
- if (!ret) {
+ if (ret < 0) {
clk_unprepare(pc->clk);
dev_err(&pdev->dev, "pwmchip_add() failed: %d\n", ret);
}
diff --git a/drivers/pwm/pwm-tegra.c b/drivers/pwm/pwm-tegra.c
index 74298c561c4e57f303f675a13987f6b70ecb5dc4..61d86b9498caa8bb381dbe274e1c0c6e65ee755b 100644
--- a/drivers/pwm/pwm-tegra.c
+++ b/drivers/pwm/pwm-tegra.c
@@ -173,10 +173,8 @@ static int tegra_pwm_probe(struct platform_device *pdev)
int ret;
pwm = devm_kzalloc(&pdev->dev, sizeof(*pwm), GFP_KERNEL);
- if (!pwm) {
- dev_err(&pdev->dev, "failed to allocate memory\n");
+ if (!pwm)
return -ENOMEM;
- }
pwm->dev = &pdev->dev;
diff --git a/drivers/pwm/pwm-tiecap.c b/drivers/pwm/pwm-tiecap.c
index 032092c7a6ae3d23705ca79d6d1e175b2a524768..74efbe7f20c3ab084939421dcafa40b108baee95 100644
--- a/drivers/pwm/pwm-tiecap.c
+++ b/drivers/pwm/pwm-tiecap.c
@@ -209,10 +209,8 @@ static int ecap_pwm_probe(struct platform_device *pdev)
u16 status;
pc = devm_kzalloc(&pdev->dev, sizeof(*pc), GFP_KERNEL);
- if (!pc) {
- dev_err(&pdev->dev, "failed to allocate memory\n");
+ if (!pc)
return -ENOMEM;
- }
clk = devm_clk_get(&pdev->dev, "fck");
if (IS_ERR(clk)) {
diff --git a/drivers/pwm/pwm-tiehrpwm.c b/drivers/pwm/pwm-tiehrpwm.c
index aee4471424d14a98da494f877909ae5e9f804990..cb75133085a8b9b0adaa71a3374645520a0023c6 100644
--- a/drivers/pwm/pwm-tiehrpwm.c
+++ b/drivers/pwm/pwm-tiehrpwm.c
@@ -138,12 +138,12 @@ static inline struct ehrpwm_pwm_chip *to_ehrpwm_pwm_chip(struct pwm_chip *chip)
return container_of(chip, struct ehrpwm_pwm_chip, chip);
}
-static u16 ehrpwm_read(void __iomem *base, int offset)
+static inline u16 ehrpwm_read(void __iomem *base, int offset)
{
return readw(base + offset);
}
-static void ehrpwm_write(void __iomem *base, int offset, unsigned int val)
+static inline void ehrpwm_write(void __iomem *base, int offset, unsigned int val)
{
writew(val & 0xFFFF, base + offset);
}
@@ -440,10 +440,8 @@ static int ehrpwm_pwm_probe(struct platform_device *pdev)
u16 status;
pc = devm_kzalloc(&pdev->dev, sizeof(*pc), GFP_KERNEL);
- if (!pc) {
- dev_err(&pdev->dev, "failed to allocate memory\n");
+ if (!pc)
return -ENOMEM;
- }
clk = devm_clk_get(&pdev->dev, "fck");
if (IS_ERR(clk)) {
@@ -531,6 +529,7 @@ static int ehrpwm_pwm_remove(struct platform_device *pdev)
return pwmchip_remove(&pc->chip);
}
+#ifdef CONFIG_PM_SLEEP
static void ehrpwm_pwm_save_context(struct ehrpwm_pwm_chip *pc)
{
pm_runtime_get_sync(pc->chip.dev);
@@ -557,7 +556,6 @@ static void ehrpwm_pwm_restore_context(struct ehrpwm_pwm_chip *pc)
ehrpwm_write(pc->mmio_base, TBCTL, pc->ctx.tbctl);
}
-#ifdef CONFIG_PM_SLEEP
static int ehrpwm_pwm_suspend(struct device *dev)
{
struct ehrpwm_pwm_chip *pc = dev_get_drvdata(dev);
diff --git a/drivers/pwm/pwm-twl.c b/drivers/pwm/pwm-twl.c
index b99a50e626a64f82ca98783cc373bd2bc4c82e01..04f76725d59158e1da8fa6968b470edfc0670d36 100644
--- a/drivers/pwm/pwm-twl.c
+++ b/drivers/pwm/pwm-twl.c
@@ -263,14 +263,6 @@ static void twl6030_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
val |= TWL6030_PWM_TOGGLE(pwm->hwpwm, TWL6030_PWMXR);
val &= ~TWL6030_PWM_TOGGLE(pwm->hwpwm, TWL6030_PWMXS | TWL6030_PWMXEN);
- ret = twl_i2c_write_u8(TWL6030_MODULE_ID1, val, TWL6030_TOGGLE3_REG);
- if (ret < 0) {
- dev_err(chip->dev, "%s: Failed to read TOGGLE3\n", pwm->label);
- goto out;
- }
-
- val |= TWL6030_PWM_TOGGLE(pwm->hwpwm, TWL6030_PWMXS | TWL6030_PWMXEN);
-
ret = twl_i2c_write_u8(TWL6030_MODULE_ID1, val, TWL6030_TOGGLE3_REG);
if (ret < 0) {
dev_err(chip->dev, "%s: Failed to disable PWM\n", pwm->label);
diff --git a/drivers/pwm/pwm-vt8500.c b/drivers/pwm/pwm-vt8500.c
index 323125abf3f4ddae2d6f2c48abe956c8b497b40e..652e6b5b859b92d6cdd2585506e9e24a7528f35b 100644
--- a/drivers/pwm/pwm-vt8500.c
+++ b/drivers/pwm/pwm-vt8500.c
@@ -211,10 +211,8 @@ static int vt8500_pwm_probe(struct platform_device *pdev)
}
chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
- if (chip == NULL) {
- dev_err(&pdev->dev, "failed to allocate memory\n");
+ if (chip == NULL)
return -ENOMEM;
- }
chip->chip.dev = &pdev->dev;
chip->chip.ops = &vt8500_pwm_ops;
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index b75201ff46f6d1bc133a5cae571b90082d11347d..38ca88bc5c3ed0c199e73b8a533ac43448506bfb 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -10,8 +10,8 @@
* published by the Free Software Foundation.
*/
+#include <linux/gpio/consumer.h>
#include <linux/gpio.h>
-#include <linux/of_gpio.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
@@ -32,8 +32,7 @@ struct pwm_bl_data {
unsigned int *levels;
bool enabled;
struct regulator *power_supply;
- int enable_gpio;
- unsigned long enable_gpio_flags;
+ struct gpio_desc *enable_gpio;
unsigned int scale;
int (*notify)(struct device *,
int brightness);
@@ -54,12 +53,8 @@ static void pwm_backlight_power_on(struct pwm_bl_data *pb, int brightness)
if (err < 0)
dev_err(pb->dev, "failed to enable power supply\n");
- if (gpio_is_valid(pb->enable_gpio)) {
- if (pb->enable_gpio_flags & PWM_BACKLIGHT_GPIO_ACTIVE_LOW)
- gpio_set_value(pb->enable_gpio, 0);
- else
- gpio_set_value(pb->enable_gpio, 1);
- }
+ if (pb->enable_gpio)
+ gpiod_set_value(pb->enable_gpio, 1);
pwm_enable(pb->pwm);
pb->enabled = true;
@@ -73,12 +68,8 @@ static void pwm_backlight_power_off(struct pwm_bl_data *pb)
pwm_config(pb->pwm, 0, pb->period);
pwm_disable(pb->pwm);
- if (gpio_is_valid(pb->enable_gpio)) {
- if (pb->enable_gpio_flags & PWM_BACKLIGHT_GPIO_ACTIVE_LOW)
- gpio_set_value(pb->enable_gpio, 1);
- else
- gpio_set_value(pb->enable_gpio, 0);
- }
+ if (pb->enable_gpio)
+ gpiod_set_value(pb->enable_gpio, 0);
regulator_disable(pb->power_supply);
pb->enabled = false;
@@ -148,7 +139,6 @@ static int pwm_backlight_parse_dt(struct device *dev,
struct platform_pwm_backlight_data *data)
{
struct device_node *node = dev->of_node;
- enum of_gpio_flags flags;
struct property *prop;
int length;
u32 value;
@@ -189,14 +179,6 @@ static int pwm_backlight_parse_dt(struct device *dev,
data->max_brightness--;
}
- data->enable_gpio = of_get_named_gpio_flags(node, "enable-gpios", 0,
- &flags);
- if (data->enable_gpio == -EPROBE_DEFER)
- return -EPROBE_DEFER;
-
- if (gpio_is_valid(data->enable_gpio) && (flags & OF_GPIO_ACTIVE_LOW))
- data->enable_gpio_flags |= PWM_BACKLIGHT_GPIO_ACTIVE_LOW;
-
return 0;
}
@@ -256,8 +238,6 @@ static int pwm_backlight_probe(struct platform_device *pdev)
} else
pb->scale = data->max_brightness;
- pb->enable_gpio = data->enable_gpio;
- pb->enable_gpio_flags = data->enable_gpio_flags;
pb->notify = data->notify;
pb->notify_after = data->notify_after;
pb->check_fb = data->check_fb;
@@ -265,26 +245,38 @@ static int pwm_backlight_probe(struct platform_device *pdev)
pb->dev = &pdev->dev;
pb->enabled = false;
- if (gpio_is_valid(pb->enable_gpio)) {
- unsigned long flags;
-
- if (pb->enable_gpio_flags & PWM_BACKLIGHT_GPIO_ACTIVE_LOW)
- flags = GPIOF_OUT_INIT_HIGH;
+ pb->enable_gpio = devm_gpiod_get(&pdev->dev, "enable");
+ if (IS_ERR(pb->enable_gpio)) {
+ ret = PTR_ERR(pb->enable_gpio);
+ if (ret == -ENOENT)
+ pb->enable_gpio = NULL;
else
- flags = GPIOF_OUT_INIT_LOW;
+ goto err_alloc;
+ }
- ret = gpio_request_one(pb->enable_gpio, flags, "enable");
+ /*
+ * Compatibility fallback for drivers still using the integer GPIO
+ * platform data. Must go away soon.
+ */
+ if (!pb->enable_gpio && gpio_is_valid(data->enable_gpio)) {
+ ret = devm_gpio_request_one(&pdev->dev, data->enable_gpio,
+ GPIOF_OUT_INIT_HIGH, "enable");
if (ret < 0) {
dev_err(&pdev->dev, "failed to request GPIO#%d: %d\n",
- pb->enable_gpio, ret);
+ data->enable_gpio, ret);
goto err_alloc;
}
+
+ pb->enable_gpio = gpio_to_desc(data->enable_gpio);
}
+ if (pb->enable_gpio)
+ gpiod_direction_output(pb->enable_gpio, 1);
+
pb->power_supply = devm_regulator_get(&pdev->dev, "power");
if (IS_ERR(pb->power_supply)) {
ret = PTR_ERR(pb->power_supply);
- goto err_gpio;
+ goto err_alloc;
}
pb->pwm = devm_pwm_get(&pdev->dev, NULL);
@@ -295,7 +287,7 @@ static int pwm_backlight_probe(struct platform_device *pdev)
if (IS_ERR(pb->pwm)) {
dev_err(&pdev->dev, "unable to request legacy PWM\n");
ret = PTR_ERR(pb->pwm);
- goto err_gpio;
+ goto err_alloc;
}
}
@@ -304,12 +296,15 @@ static int pwm_backlight_probe(struct platform_device *pdev)
/*
* The DT case will set the pwm_period_ns field to 0 and store the
* period, parsed from the DT, in the PWM device. For the non-DT case,
- * set the period from platform data.
+ * set the period from platform data if it has not already been set
+ * via the PWM lookup table.
*/
- if (data->pwm_period_ns > 0)
+ pb->period = pwm_get_period(pb->pwm);
+ if (!pb->period && (data->pwm_period_ns > 0)) {
+ pb->period = data->pwm_period_ns;
pwm_set_period(pb->pwm, data->pwm_period_ns);
+ }
- pb->period = pwm_get_period(pb->pwm);
pb->lth_brightness = data->lth_brightness * (pb->period / pb->scale);
memset(&props, 0, sizeof(struct backlight_properties));
@@ -320,7 +315,7 @@ static int pwm_backlight_probe(struct platform_device *pdev)
if (IS_ERR(bl)) {
dev_err(&pdev->dev, "failed to register backlight\n");
ret = PTR_ERR(bl);
- goto err_gpio;
+ goto err_alloc;
}
if (data->dft_brightness > data->max_brightness) {
@@ -336,9 +331,6 @@ static int pwm_backlight_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, bl);
return 0;
-err_gpio:
- if (gpio_is_valid(pb->enable_gpio))
- gpio_free(pb->enable_gpio);
err_alloc:
if (data->exit)
data->exit(&pdev->dev);
@@ -359,6 +351,14 @@ static int pwm_backlight_remove(struct platform_device *pdev)
return 0;
}
+static void pwm_backlight_shutdown(struct platform_device *pdev)
+{
+ struct backlight_device *bl = platform_get_drvdata(pdev);
+ struct pwm_bl_data *pb = bl_get_data(bl);
+
+ pwm_backlight_power_off(pb);
+}
+
#ifdef CONFIG_PM_SLEEP
static int pwm_backlight_suspend(struct device *dev)
{
@@ -404,6 +404,7 @@ static struct platform_driver pwm_backlight_driver = {
},
.probe = pwm_backlight_probe,
.remove = pwm_backlight_remove,
+ .shutdown = pwm_backlight_shutdown,
};
module_platform_driver(pwm_backlight_driver);
diff --git a/include/linux/platform_data/pwm-renesas-tpu.h b/include/linux/platform_data/pwm-renesas-tpu.h
deleted file mode 100644
index a7220b10ddab59a60dbc872c32feb98d660aff16..0000000000000000000000000000000000000000
--- a/include/linux/platform_data/pwm-renesas-tpu.h
+++ /dev/null
@@ -1,16 +0,0 @@
-#ifndef __PWM_RENESAS_TPU_H__
-#define __PWM_RENESAS_TPU_H__
-
-#include <linux/pwm.h>
-
-#define TPU_CHANNEL_MAX 4
-
-struct tpu_pwm_channel_data {
- enum pwm_polarity polarity;
-};
-
-struct tpu_pwm_platform_data {
- struct tpu_pwm_channel_data channels[TPU_CHANNEL_MAX];
-};
-
-#endif /* __PWM_RENESAS_TPU_H__ */
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index 4717f54051cb70543c745ff7ebba1aad5ed23a7f..e90628cac8fae57e8a88ecd9f93d2a2f1342b9d5 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -274,14 +274,18 @@ struct pwm_lookup {
unsigned int index;
const char *dev_id;
const char *con_id;
+ unsigned int period;
+ enum pwm_polarity polarity;
};
-#define PWM_LOOKUP(_provider, _index, _dev_id, _con_id) \
+#define PWM_LOOKUP(_provider, _index, _dev_id, _con_id, _period, _polarity) \
{ \
.provider = _provider, \
.index = _index, \
.dev_id = _dev_id, \
.con_id = _con_id, \
+ .period = _period, \
+ .polarity = _polarity \
}
#if IS_ENABLED(CONFIG_PWM)
diff --git a/include/linux/pwm_backlight.h b/include/linux/pwm_backlight.h
index 2de2e275b2cbd1390ec6693d8f436b05352da16a..efdd9227a49c9c9e77e7b74fff7e891df27935b7 100644
--- a/include/linux/pwm_backlight.h
+++ b/include/linux/pwm_backlight.h
@@ -6,9 +6,6 @@
#include <linux/backlight.h>
-/* TODO: convert to gpiod_*() API once it has been merged */
-#define PWM_BACKLIGHT_GPIO_ACTIVE_LOW (1 << 0)
-
struct platform_pwm_backlight_data {
int pwm_id;
unsigned int max_brightness;
@@ -16,8 +13,8 @@ struct platform_pwm_backlight_data {
unsigned int lth_brightness;
unsigned int pwm_period_ns;
unsigned int *levels;
+ /* TODO remove once all users are switched to gpiod_* API */
int enable_gpio;
- unsigned long enable_gpio_flags;
int (*init)(struct device *dev);
int (*notify)(struct device *dev, int brightness);
void (*notify_after)(struct device *dev, int brightness);