[kernel] clean up pwm patches and drivers

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@32901 3c298f89-4303-0410-b956-a3cf2f4a3e73

5 files changed, 28 insertions, 608 deletions

diff --git a/target/linux/at91/modules.mk b/target/linux/at91/modules.mk
index 0c6c03ab59..9c8ef3d5a8 100644
--- a/target/linux/at91/modules.mk
+++ b/target/linux/at91/modules.mk
@@ -24,10 +24,9 @@ define KernelPackage/pwm-atmel
   SUBMENU:=$(OTHER_MENU)
   TITLE:=PWM on atmel SoC
   DEPENDS:=@TARGET_at91
-  KCONFIG:=CONFIG_GENERIC_PWM \
-		CONFIG_ATMEL_PWM
-  FILES:=$(LINUX_DIR)/drivers/pwm/atmel-pwm.ko
-  AUTOLOAD:=$(call AutoLoad,51,atmel-pwm)
+  KCONFIG:=CONFIG_ATMEL_PWM
+  FILES:=$(LINUX_DIR)/drivers/misc/atmel_pwm.ko
+  AUTOLOAD:=$(call AutoLoad,51,atmel_pwm)
 endef
 
 define KernelPackage/pwm-atmel/description
diff --git a/target/linux/generic/files/drivers/pwm/Kconfig b/target/linux/generic/files/drivers/pwm/Kconfig
index 1c24e11077..70f4442eab 100644
--- a/target/linux/generic/files/drivers/pwm/Kconfig
+++ b/target/linux/generic/files/drivers/pwm/Kconfig
@@ -11,17 +11,6 @@ menuconfig GENERIC_PWM
 
 if GENERIC_PWM
 
-config ATMEL_PWM
-	tristate "Atmel AT32/AT91 PWM support"
-	depends on AVR32 || ARCH_AT91
-	help
-	  This option enables device driver support for the PWMC
-	  peripheral channels found on certain Atmel processors.
-	  Pulse Width Modulation is used many for purposes, including
-	  software controlled power-efficient backlights on LCD
-	  displays, motor control, and waveform generation.  If
-	  unsure, say N.
-
 config GPIO_PWM
        tristate "PWM emulation using GPIO"
        help
diff --git a/target/linux/generic/files/drivers/pwm/Makefile b/target/linux/generic/files/drivers/pwm/Makefile
index af22041bf2..3a0e996744 100644
--- a/target/linux/generic/files/drivers/pwm/Makefile
+++ b/target/linux/generic/files/drivers/pwm/Makefile
@@ -2,5 +2,4 @@
 # Makefile for pwm devices
 #
 obj-$(CONFIG_GENERIC_PWM) := pwm.o
-obj-$(CONFIG_ATMEL_PWM)		+= atmel-pwm.o
 obj-$(CONFIG_GPIO_PWM)		+= gpio-pwm.o
diff --git a/target/linux/generic/files/drivers/pwm/atmel-pwm.c b/target/linux/generic/files/drivers/pwm/atmel-pwm.c
deleted file mode 100644
index 158bb922c1..0000000000
--- a/target/linux/generic/files/drivers/pwm/atmel-pwm.c
+++ /dev/null
@@ -1,592 +0,0 @@
-/*
- * drivers/pwm/atmel-pwm.c
- *
- * Copyright (C) 2010 Bill Gatliff <bgat@billgatliff.com>
- * Copyright (C) 2007 David Brownell
- *
- * This program is free software; you may redistribute and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- * USA
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/pwm/pwm.h>
-
-enum {
-	/* registers common to the PWMC peripheral */
-	PWMC_MR = 0,
-	PWMC_ENA = 4,
-	PWMC_DIS = 8,
-	PWMC_SR = 0xc,
-	PWMC_IER = 0x10,
-	PWMC_IDR = 0x14,
-	PWMC_IMR = 0x18,
-	PWMC_ISR = 0x1c,
-
-	/* registers per each PWMC channel */
-	PWMC_CMR = 0,
-	PWMC_CDTY = 4,
-	PWMC_CPRD = 8,
-	PWMC_CCNT = 0xc,
-	PWMC_CUPD = 0x10,
-
-	/* how to find each channel */
-	PWMC_CHAN_BASE = 0x200,
-	PWMC_CHAN_STRIDE = 0x20,
-
-	/* CMR bits of interest */
-	PWMC_CMR_CPD = 10,
-	PWMC_CMR_CPOL = 9,
-	PWMC_CMR_CALG = 8,
-	PWMC_CMR_CPRE_MASK = 0xf,
-};
-
-struct atmel_pwm {
-	struct pwm_device pwm;
-	spinlock_t lock;
-	void __iomem *iobase;
-	struct clk *clk;
-	u32 *sync_mask;
-	int irq;
-	u32 ccnt_mask;
-};
-
-static inline struct atmel_pwm *to_atmel_pwm(const struct pwm_channel *p)
-{
-	return container_of(p->pwm, struct atmel_pwm, pwm);
-}
-
-static inline void
-pwmc_writel(const struct atmel_pwm *p,
-	    unsigned offset, u32 val)
-{
-	__raw_writel(val, p->iobase + offset);
-}
-
-static inline u32
-pwmc_readl(const struct atmel_pwm *p,
-	   unsigned offset)
-{
-	return __raw_readl(p->iobase + offset);
-}
-
-static inline void
-pwmc_chan_writel(const struct pwm_channel *p,
-		 u32 offset, u32 val)
-{
-	const struct atmel_pwm *ap = to_atmel_pwm(p);
-
-	if (PWMC_CMR == offset)
-		val &= ((1 << PWMC_CMR_CPD)
-			| (1 << PWMC_CMR_CPOL)
-			| (1 << PWMC_CMR_CALG)
-			| (PWMC_CMR_CPRE_MASK));
-	else
-		val &= ap->ccnt_mask;
-
-	pwmc_writel(ap, offset + PWMC_CHAN_BASE
-		    + (p->chan * PWMC_CHAN_STRIDE), val);
-}
-
-static inline u32
-pwmc_chan_readl(const struct pwm_channel *p,
-		u32 offset)
-{
-	const struct atmel_pwm *ap = to_atmel_pwm(p);
-
-	return pwmc_readl(ap, offset + PWMC_CHAN_BASE
-			  + (p->chan * PWMC_CHAN_STRIDE));
-}
-
-static inline int
-__atmel_pwm_is_on(struct pwm_channel *p)
-{
-	struct atmel_pwm *ap = to_atmel_pwm(p);
-	return (pwmc_readl(ap, PWMC_SR) & (1 << p->chan)) ? 1 : 0;
-}
-
-static inline void
-__atmel_pwm_unsynchronize(struct pwm_channel *p,
-			  struct pwm_channel *to_p)
-{
-	const struct atmel_pwm *ap = to_atmel_pwm(p);
-	int wchan;
-
-	if (to_p) {
-		ap->sync_mask[p->chan] &= ~(1 << to_p->chan);
-		ap->sync_mask[to_p->chan] &= ~(1 << p->chan);
-		goto done;
-	}
-
-	ap->sync_mask[p->chan] = 0;
-	for (wchan = 0; wchan < ap->pwm.nchan; wchan++)
-		ap->sync_mask[wchan] &= ~(1 << p->chan);
-done:
-	dev_dbg(p->pwm->dev, "sync_mask %x\n", ap->sync_mask[p->chan]);
-}
-
-static inline void
-__atmel_pwm_synchronize(struct pwm_channel *p,
-			struct pwm_channel *to_p)
-{
-	const struct atmel_pwm *ap = to_atmel_pwm(p);
-
-	if (!to_p)
-		return;
-
-	ap->sync_mask[p->chan] |= (1 << to_p->chan);
-	ap->sync_mask[to_p->chan] |= (1 << p->chan);
-
-	dev_dbg(p->pwm->dev, "sync_mask %x\n", ap->sync_mask[p->chan]);
-}
-
-static inline void
-__atmel_pwm_stop(struct pwm_channel *p)
-{
-	struct atmel_pwm *ap = to_atmel_pwm(p);
-	u32 chid = 1 << p->chan;
-
-	pwmc_writel(ap, PWMC_DIS, ap->sync_mask[p->chan] | chid);
-}
-
-static inline void
-__atmel_pwm_start(struct pwm_channel *p)
-{
-	struct atmel_pwm *ap = to_atmel_pwm(p);
-	u32 chid = 1 << p->chan;
-
-	pwmc_writel(ap, PWMC_ENA, ap->sync_mask[p->chan] | chid);
-}
-
-static int
-atmel_pwm_synchronize(struct pwm_channel *p,
-		      struct pwm_channel *to_p)
-{
-	unsigned long flags;
-	spin_lock_irqsave(&p->lock, flags);
-	__atmel_pwm_synchronize(p, to_p);
-	spin_unlock_irqrestore(&p->lock, flags);
-	return 0;
-}
-
-static int
-atmel_pwm_unsynchronize(struct pwm_channel *p,
-			struct pwm_channel *from_p)
-{
-	unsigned long flags;
-	spin_lock_irqsave(&p->lock, flags);
-	__atmel_pwm_unsynchronize(p, from_p);
-	spin_unlock_irqrestore(&p->lock, flags);
-	return 0;
-}
-
-static inline int
-__atmel_pwm_config_polarity(struct pwm_channel *p,
-			    struct pwm_channel_config *c)
-{
-	u32 cmr = pwmc_chan_readl(p, PWMC_CMR);
-
-	if (c->polarity)
-		cmr &= ~BIT(PWMC_CMR_CPOL);
-	else
-		cmr |= BIT(PWMC_CMR_CPOL);
-	pwmc_chan_writel(p, PWMC_CMR, cmr);
-	p->active_high = c->polarity ? 1 : 0;
-
-	dev_dbg(p->pwm->dev, "polarity %d\n", c->polarity);
-	return 0;
-}
-
-static inline int
-__atmel_pwm_config_duty_ticks(struct pwm_channel *p,
-			      struct pwm_channel_config *c)
-{
-	u32 cmr, cprd, cpre, cdty;
-
-	cmr = pwmc_chan_readl(p, PWMC_CMR);
-	cprd = pwmc_chan_readl(p, PWMC_CPRD);
-
-	cpre = cmr & PWMC_CMR_CPRE_MASK;
-	cmr &= ~BIT(PWMC_CMR_CPD);
-
-	cdty = cprd - (c->duty_ticks >> cpre);
-
-	p->duty_ticks = c->duty_ticks;
-
-	if (__atmel_pwm_is_on(p)) {
-		pwmc_chan_writel(p, PWMC_CMR, cmr);
-		pwmc_chan_writel(p, PWMC_CUPD, cdty);
-	} else
-		pwmc_chan_writel(p, PWMC_CDTY, cdty);
-
-	dev_dbg(p->pwm->dev, "duty_ticks = %lu cprd = %x"
-		" cdty = %x cpre = %x\n", p->duty_ticks,
-		cprd, cdty, cpre);
-
-	return 0;
-}
-
-static inline int
-__atmel_pwm_config_period_ticks(struct pwm_channel *p,
-				struct pwm_channel_config *c)
-{
-	u32 cmr, cprd, cpre;
-
-	cpre = fls(c->period_ticks);
-	if (cpre < 16)
-		cpre = 0;
-	else {
-		cpre -= 15;
-		if (cpre > 10)
-			return -EINVAL;
-	}
-
-	cmr = pwmc_chan_readl(p, PWMC_CMR);
-	cmr &= ~PWMC_CMR_CPRE_MASK;
-	cmr |= cpre;
-
-	cprd = c->period_ticks >> cpre;
-
-	pwmc_chan_writel(p, PWMC_CMR, cmr);
-	pwmc_chan_writel(p, PWMC_CPRD, cprd);
-	p->period_ticks = c->period_ticks;
-
-	dev_dbg(p->pwm->dev, "period_ticks = %lu cprd = %x cpre = %x\n",
-		 p->period_ticks, cprd, cpre);
-
-	return 0;
-}
-
-static int
-atmel_pwm_config_nosleep(struct pwm_channel *p,
-			 struct pwm_channel_config *c)
-{
-	int ret = 0;
-	unsigned long flags;
-
-	spin_lock_irqsave(&p->lock, flags);
-
-	switch (c->config_mask) {
-
-	case PWM_CONFIG_DUTY_TICKS:
-		__atmel_pwm_config_duty_ticks(p, c);
-		break;
-
-	case PWM_CONFIG_STOP:
-		__atmel_pwm_stop(p);
-		break;
-
-	case PWM_CONFIG_START:
-		__atmel_pwm_start(p);
-		break;
-
-	case PWM_CONFIG_POLARITY:
-		__atmel_pwm_config_polarity(p, c);
-		break;
-
-	default:
-		ret = -EINVAL;
-		break;
-	}
-
-	spin_unlock_irqrestore(&p->lock, flags);
-	return ret;
-}
-
-static int
-atmel_pwm_stop_sync(struct pwm_channel *p)
-{
-	struct atmel_pwm *ap = container_of(p->pwm, struct atmel_pwm, pwm);
-	int ret;
-	int was_on = __atmel_pwm_is_on(p);
-
-	if (was_on) {
-		do {
-			init_completion(&p->complete);
-			set_bit(FLAG_STOP, &p->flags);
-			pwmc_writel(ap, PWMC_IER, 1 << p->chan);
-
-			dev_dbg(p->pwm->dev, "waiting on stop_sync completion...\n");
-
-			ret = wait_for_completion_interruptible(&p->complete);
-
-			dev_dbg(p->pwm->dev, "stop_sync complete (%d)\n", ret);
-
-			if (ret)
-				return ret;
-		} while (p->flags & BIT(FLAG_STOP));
-	}
-
-	return was_on;
-}
-
-static int
-atmel_pwm_config(struct pwm_channel *p,
-		 struct pwm_channel_config *c)
-{
-	int was_on = 0;
-
-	if (p->pwm->config_nosleep) {
-		if (!p->pwm->config_nosleep(p, c))
-			return 0;
-	}
-
-	might_sleep();
-
-	dev_dbg(p->pwm->dev, "config_mask %x\n", c->config_mask);
-
-	was_on = atmel_pwm_stop_sync(p);
-	if (was_on < 0)
-		return was_on;
-
-	if (c->config_mask & PWM_CONFIG_PERIOD_TICKS) {
-		__atmel_pwm_config_period_ticks(p, c);
-		if (!(c->config_mask & PWM_CONFIG_DUTY_TICKS)) {
-			struct pwm_channel_config d = {
-				.config_mask = PWM_CONFIG_DUTY_TICKS,
-				.duty_ticks = p->duty_ticks,
-			};
-			__atmel_pwm_config_duty_ticks(p, &d);
-		}
-	}
-
-	if (c->config_mask & PWM_CONFIG_DUTY_TICKS)
-		__atmel_pwm_config_duty_ticks(p, c);
-
-	if (c->config_mask & PWM_CONFIG_POLARITY)
-		__atmel_pwm_config_polarity(p, c);
-
-	if ((c->config_mask & PWM_CONFIG_START)
-	    || (was_on && !(c->config_mask & PWM_CONFIG_STOP)))
-		__atmel_pwm_start(p);
-
-	return 0;
-}
-
-static void
-__atmel_pwm_set_callback(struct pwm_channel *p,
-			 pwm_callback_t callback)
-{
-	struct atmel_pwm *ap = container_of(p->pwm, struct atmel_pwm, pwm);
-
-	p->callback = callback;
-	pwmc_writel(ap, p->callback ? PWMC_IER : PWMC_IDR, 1 << p->chan);
-}
-
-static int
-atmel_pwm_set_callback(struct pwm_channel *p,
-		       pwm_callback_t callback)
-{
-	struct atmel_pwm *ap = to_atmel_pwm(p);
-	unsigned long flags;
-
-	spin_lock_irqsave(&ap->lock, flags);
-	__atmel_pwm_set_callback(p, callback);
-	spin_unlock_irqrestore(&ap->lock, flags);
-
-	return 0;
-}
-
-static int
-atmel_pwm_request(struct pwm_channel *p)
-{
-	struct atmel_pwm *ap = to_atmel_pwm(p);
-	unsigned long flags;
-
-	spin_lock_irqsave(&p->lock, flags);
-	clk_enable(ap->clk);
-	p->tick_hz = clk_get_rate(ap->clk);
-	__atmel_pwm_unsynchronize(p, NULL);
-	__atmel_pwm_stop(p);
-	spin_unlock_irqrestore(&p->lock, flags);
-
-	return 0;
-}
-
-static void
-atmel_pwm_free(struct pwm_channel *p)
-{
-	struct atmel_pwm *ap = to_atmel_pwm(p);
-	clk_disable(ap->clk);
-}
-
-static irqreturn_t
-atmel_pwmc_irq(int irq, void *data)
-{
-	struct atmel_pwm *ap = data;
-	struct pwm_channel *p;
-	u32 isr;
-	int chid;
-	unsigned long flags;
-
-	spin_lock_irqsave(&ap->lock, flags);
-
-	isr = pwmc_readl(ap, PWMC_ISR);
-	for (chid = 0; isr; chid++, isr >>= 1) {
-		p = &ap->pwm.channels[chid];
-		if (isr & 1) {
-			if (p->callback)
-				p->callback(p);
-			if (p->flags & BIT(FLAG_STOP)) {
-				__atmel_pwm_stop(p);
-				clear_bit(FLAG_STOP, &p->flags);
-			}
-			complete_all(&p->complete);
-		}
-	}
-
-	spin_unlock_irqrestore(&ap->lock, flags);
-
-	return IRQ_HANDLED;
-}
-
-static int __devinit
-atmel_pwmc_probe(struct platform_device *pdev)
-{
-	struct atmel_pwm *ap;
-	struct resource *r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	int ret = 0;
-
-	ap = kzalloc(sizeof(*ap), GFP_KERNEL);
-	if (!ap) {
-		ret = -ENOMEM;
-		goto err_atmel_pwm_alloc;
-	}
-
-	spin_lock_init(&ap->lock);
-	platform_set_drvdata(pdev, ap);
-
-	ap->pwm.dev = &pdev->dev;
-	ap->pwm.bus_id = dev_name(&pdev->dev);
-
-	ap->pwm.nchan = 4; /* TODO: true only for SAM9263 and AP7000 */
-	ap->ccnt_mask = 0xffffUL; /* TODO: true only for SAM9263 */
-
-	ap->sync_mask = kzalloc(ap->pwm.nchan * sizeof(u32), GFP_KERNEL);
-	if (!ap->sync_mask) {
-		ret = -ENOMEM;
-		goto err_alloc_sync_masks;
-	}
-
-	ap->pwm.owner = THIS_MODULE;
-	ap->pwm.request = atmel_pwm_request;
-	ap->pwm.free = atmel_pwm_free;
-	ap->pwm.config_nosleep = atmel_pwm_config_nosleep;
-	ap->pwm.config = atmel_pwm_config;
-	ap->pwm.synchronize = atmel_pwm_synchronize;
-	ap->pwm.unsynchronize = atmel_pwm_unsynchronize;
-	ap->pwm.set_callback = atmel_pwm_set_callback;
-
-	ap->clk = clk_get(&pdev->dev, "pwm_clk");
-	if (PTR_ERR(ap->clk)) {
-		ret = -ENODEV;
-		goto err_clk_get;
-	}
-
-	ap->iobase = ioremap_nocache(r->start, r->end - r->start + 1);
-	if (!ap->iobase) {
-		ret = -ENODEV;
-		goto err_ioremap;
-	}
-
-	clk_enable(ap->clk);
-	pwmc_writel(ap, PWMC_DIS, -1);
-	pwmc_writel(ap, PWMC_IDR, -1);
-	clk_disable(ap->clk);
-
-	ap->irq = platform_get_irq(pdev, 0);
-	if (ap->irq != -ENXIO) {
-		ret = request_irq(ap->irq, atmel_pwmc_irq, 0,
-				  ap->pwm.bus_id, ap);
-		if (ret)
-			goto err_request_irq;
-	}
-
-	ret = pwm_register(&ap->pwm);
-	if (ret)
-		goto err_pwm_register;
-
-	return 0;
-
-err_pwm_register:
-	if (ap->irq != -ENXIO)
-		free_irq(ap->irq, ap);
-err_request_irq:
-	iounmap(ap->iobase);
-err_ioremap:
-	clk_put(ap->clk);
-err_clk_get:
-	platform_set_drvdata(pdev, NULL);
-err_alloc_sync_masks:
-	kfree(ap);
-err_atmel_pwm_alloc:
-	return ret;
-}
-
-static int __devexit
-atmel_pwmc_remove(struct platform_device *pdev)
-{
-	struct atmel_pwm *ap = platform_get_drvdata(pdev);
-	int ret;
-
-	/* TODO: what can we do if this fails? */
-	ret = pwm_unregister(&ap->pwm);
-
-	clk_enable(ap->clk);
-	pwmc_writel(ap, PWMC_IDR, -1);
-	pwmc_writel(ap, PWMC_DIS, -1);
-	clk_disable(ap->clk);
-
-	if (ap->irq != -ENXIO)
-		free_irq(ap->irq, ap);
-
-	clk_put(ap->clk);
-	iounmap(ap->iobase);
-
-	kfree(ap);
-
-	return 0;
-}
-
-static struct platform_driver atmel_pwm_driver = {
-	.driver = {
-		.name = "atmel_pwmc",
-		.owner = THIS_MODULE,
-	},
-	.probe = atmel_pwmc_probe,
-	.remove = __devexit_p(atmel_pwmc_remove),
-};
-
-static int __init atmel_pwm_init(void)
-{
-	return platform_driver_register(&atmel_pwm_driver);
-}
-module_init(atmel_pwm_init);
-
-static void __exit atmel_pwm_exit(void)
-{
-	platform_driver_unregister(&atmel_pwm_driver);
-}
-module_exit(atmel_pwm_exit);
-
-MODULE_AUTHOR("Bill Gatliff <bgat@billgatliff.com>");
-MODULE_DESCRIPTION("Driver for Atmel PWMC peripheral");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:atmel_pwmc");
diff --git a/target/linux/generic/patches-3.3/865-gpiopwm.patch b/target/linux/generic/patches-3.3/865-gpiopwm.patch
new file mode 100644
index 0000000000..219de16257
--- /dev/null
+++ b/target/linux/generic/patches-3.3/865-gpiopwm.patch
@@ -0,0 +1,25 @@
+Index: linux-3.3.8/drivers/Kconfig
+===================================================================
+--- linux-3.3.8.orig/drivers/Kconfig	2012-06-01 09:16:13.000000000 +0200
++++ linux-3.3.8/drivers/Kconfig	2012-07-28 22:16:32.894397322 +0200
+@@ -60,6 +60,8 @@
+ 
+ source "drivers/gpio/Kconfig"
+ 
++source "drivers/pwm/Kconfig"
++
+ source "drivers/w1/Kconfig"
+ 
+ source "drivers/power/Kconfig"
+Index: linux-3.3.8/drivers/Makefile
+===================================================================
+--- linux-3.3.8.orig/drivers/Makefile	2012-06-01 09:16:13.000000000 +0200
++++ linux-3.3.8/drivers/Makefile	2012-07-28 22:16:17.990396684 +0200
+@@ -8,6 +8,7 @@
+ # GPIO must come after pinctrl as gpios may need to mux pins etc
+ obj-y				+= pinctrl/
+ obj-y				+= gpio/
++obj-$(CONFIG_GENERIC_PWM)	+= pwm/
+ obj-$(CONFIG_PCI)		+= pci/
+ obj-$(CONFIG_PARISC)		+= parisc/
+ obj-$(CONFIG_RAPIDIO)		+= rapidio/