From c8ebae37034c0ead62eb4df8ef88e999ddb8d5cf Mon Sep 17 00:00:00 2001 From: Russell King Date: Tue, 11 Jan 2011 19:35:53 +0000 Subject: ARM: mmci: add dmaengine-based DMA support Based on a patch from Linus Walleij. Add dmaengine based support for DMA to the MMCI driver, using the Primecell DMA engine interface. The changes over Linus' driver are: - rename txsize_threshold to dmasize_threshold, as this reflects the purpose more. - use 'mmci_dma_' as the function prefix rather than 'dma_mmci_'. - clean up requesting of dma channels. - don't release a single channel twice when it's shared between tx and rx. - get rid of 'dma_enable' bool - instead check whether the channel is NULL. - detect incomplete DMA at the end of a transfer. Some DMA controllers (eg, PL08x) are unable to be configured for scatter DMA and also listen to all four DMA request signals [BREQ,SREQ,LBREQ,LSREQ] from the MMCI. They can do one or other but not both. As MMCI uses LBREQ/LSREQ for the final burst/words, PL08x does not transfer the last few words. - map and unmap DMA buffers using the DMA engine struct device, not the MMCI struct device - the DMA engine is doing the DMA transfer, not us. - avoid double-unmapping of the DMA buffers on MMCI data errors. - don't check for negative values from the dmaengine tx submission function - Dan says this must never fail. - use new dmaengine helper functions rather than using the ugly function pointers directly. - allow DMA code to be fully optimized away using dma_inprogress() which is defined to constant 0 if DMA engine support is disabled. - request maximum segment size from the DMA engine struct device and set this appropriately. - removed checking of buffer alignment - the DMA engine should deal with its own restrictions on buffer alignment, not the individual DMA engine users. - removed setting DMAREQCTL - this confuses some DMA controllers as it causes LBREQ to be asserted for the last seven transfers, rather than six SREQ and one LSREQ. - removed burst setting - the DMA controller should not burst past the transfer size required to complete the DMA operation. Tested-by: Linus Walleij Signed-off-by: Russell King --- include/linux/amba/mmci.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'include/linux/amba') diff --git a/include/linux/amba/mmci.h b/include/linux/amba/mmci.h index f4ee9acc9721..f60227088b7b 100644 --- a/include/linux/amba/mmci.h +++ b/include/linux/amba/mmci.h @@ -6,6 +6,9 @@ #include +/* Just some dummy forwarding */ +struct dma_chan; + /** * struct mmci_platform_data - platform configuration for the MMCI * (also known as PL180) block. @@ -27,6 +30,17 @@ * @cd_invert: true if the gpio_cd pin value is active low * @capabilities: the capabilities of the block as implemented in * this platform, signify anything MMC_CAP_* from mmc/host.h + * @dma_filter: function used to select an apropriate RX and TX + * DMA channel to be used for DMA, if and only if you're deploying the + * generic DMA engine + * @dma_rx_param: parameter passed to the DMA allocation + * filter in order to select an apropriate RX channel. If + * there is a bidirectional RX+TX channel, then just specify + * this and leave dma_tx_param set to NULL + * @dma_tx_param: parameter passed to the DMA allocation + * filter in order to select an apropriate TX channel. If this + * is NULL the driver will attempt to use the RX channel as a + * bidirectional channel */ struct mmci_platform_data { unsigned int f_max; @@ -38,6 +52,9 @@ struct mmci_platform_data { int gpio_cd; bool cd_invert; unsigned long capabilities; + bool (*dma_filter)(struct dma_chan *chan, void *filter_param); + void *dma_rx_param; + void *dma_tx_param; }; #endif -- cgit v1.2.3-70-g09d2 From 394d5aefcdecb51bbf7d6df757e73559c9692a08 Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Sat, 12 Feb 2011 15:58:25 +0100 Subject: ARM: 6662/1: amba: make amba_bustype non-static Export amba_bustype struct so it can be used for things like registering bus notifiers. Signed-off-by: Rob Herring Signed-off-by: Russell King --- drivers/amba/bus.c | 2 +- include/linux/amba/bus.h | 2 ++ 2 files changed, 3 insertions(+), 1 deletion(-) (limited to 'include/linux/amba') diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c index e7df019d29d4..ca96b0a26303 100644 --- a/drivers/amba/bus.c +++ b/drivers/amba/bus.c @@ -106,7 +106,7 @@ static struct device_attribute amba_dev_attrs[] = { * Primecells are part of the Advanced Microcontroller Bus Architecture, * so we call the bus "amba". */ -static struct bus_type amba_bustype = { +struct bus_type amba_bustype = { .name = "amba", .dev_attrs = amba_dev_attrs, .match = amba_match, diff --git a/include/linux/amba/bus.h b/include/linux/amba/bus.h index 9e7f259346e1..a0ccf28e9741 100644 --- a/include/linux/amba/bus.h +++ b/include/linux/amba/bus.h @@ -56,6 +56,8 @@ enum amba_vendor { AMBA_VENDOR_ST = 0x80, }; +extern struct bus_type amba_bustype; + #define amba_get_drvdata(d) dev_get_drvdata(&d->dev) #define amba_set_drvdata(d,p) dev_set_drvdata(&d->dev, p) -- cgit v1.2.3-70-g09d2 From aa25afad2ca60d19457849ea75e9c31236f4e174 Mon Sep 17 00:00:00 2001 From: Russell King Date: Sat, 19 Feb 2011 15:55:00 +0000 Subject: ARM: amba: make probe() functions take const id tables Make Primecell driver probe functions take a const pointer to their ID tables. Drivers should never modify their ID tables in their probe handler. Signed-off-by: Russell King --- arch/arm/kernel/etm.c | 4 ++-- drivers/char/hw_random/nomadik-rng.c | 2 +- drivers/dma/amba-pl08x.c | 2 +- drivers/dma/pl330.c | 2 +- drivers/gpio/pl061.c | 2 +- drivers/input/serio/ambakmi.c | 3 ++- drivers/mmc/host/mmci.c | 3 ++- drivers/rtc/rtc-pl030.c | 2 +- drivers/rtc/rtc-pl031.c | 2 +- drivers/spi/amba-pl022.c | 2 +- drivers/tty/serial/amba-pl010.c | 2 +- drivers/tty/serial/amba-pl011.c | 2 +- drivers/video/amba-clcd.c | 2 +- drivers/watchdog/sp805_wdt.c | 2 +- include/linux/amba/bus.h | 2 +- sound/arm/aaci.c | 3 ++- 16 files changed, 20 insertions(+), 17 deletions(-) (limited to 'include/linux/amba') diff --git a/arch/arm/kernel/etm.c b/arch/arm/kernel/etm.c index 11db62806a1a..052b509e2d5f 100644 --- a/arch/arm/kernel/etm.c +++ b/arch/arm/kernel/etm.c @@ -338,7 +338,7 @@ static struct miscdevice etb_miscdev = { .fops = &etb_fops, }; -static int __init etb_probe(struct amba_device *dev, struct amba_id *id) +static int __init etb_probe(struct amba_device *dev, const struct amba_id *id) { struct tracectx *t = &tracer; int ret = 0; @@ -530,7 +530,7 @@ static ssize_t trace_mode_store(struct kobject *kobj, static struct kobj_attribute trace_mode_attr = __ATTR(trace_mode, 0644, trace_mode_show, trace_mode_store); -static int __init etm_probe(struct amba_device *dev, struct amba_id *id) +static int __init etm_probe(struct amba_device *dev, const struct amba_id *id) { struct tracectx *t = &tracer; int ret = 0; diff --git a/drivers/char/hw_random/nomadik-rng.c b/drivers/char/hw_random/nomadik-rng.c index a348c7e9aa0b..dd1d143eb8ea 100644 --- a/drivers/char/hw_random/nomadik-rng.c +++ b/drivers/char/hw_random/nomadik-rng.c @@ -39,7 +39,7 @@ static struct hwrng nmk_rng = { .read = nmk_rng_read, }; -static int nmk_rng_probe(struct amba_device *dev, struct amba_id *id) +static int nmk_rng_probe(struct amba_device *dev, const struct amba_id *id) { void __iomem *base; int ret; diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c index 07bca4970e50..e6d7228b1479 100644 --- a/drivers/dma/amba-pl08x.c +++ b/drivers/dma/amba-pl08x.c @@ -1845,7 +1845,7 @@ static inline void init_pl08x_debugfs(struct pl08x_driver_data *pl08x) } #endif -static int pl08x_probe(struct amba_device *adev, struct amba_id *id) +static int pl08x_probe(struct amba_device *adev, const struct amba_id *id) { struct pl08x_driver_data *pl08x; const struct vendor_data *vd = id->data; diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c index 7c50f6dfd3f4..6abe1ec1f2ce 100644 --- a/drivers/dma/pl330.c +++ b/drivers/dma/pl330.c @@ -657,7 +657,7 @@ static irqreturn_t pl330_irq_handler(int irq, void *data) } static int __devinit -pl330_probe(struct amba_device *adev, struct amba_id *id) +pl330_probe(struct amba_device *adev, const struct amba_id *id) { struct dma_pl330_platdata *pdat; struct dma_pl330_dmac *pdmac; diff --git a/drivers/gpio/pl061.c b/drivers/gpio/pl061.c index 2975d22daffe..838ddbdf90cc 100644 --- a/drivers/gpio/pl061.c +++ b/drivers/gpio/pl061.c @@ -232,7 +232,7 @@ static void pl061_irq_handler(unsigned irq, struct irq_desc *desc) desc->irq_data.chip->irq_unmask(&desc->irq_data); } -static int pl061_probe(struct amba_device *dev, struct amba_id *id) +static int pl061_probe(struct amba_device *dev, const struct amba_id *id) { struct pl061_platform_data *pdata; struct pl061_gpio *chip; diff --git a/drivers/input/serio/ambakmi.c b/drivers/input/serio/ambakmi.c index 92563a681d65..12abc50508e5 100644 --- a/drivers/input/serio/ambakmi.c +++ b/drivers/input/serio/ambakmi.c @@ -107,7 +107,8 @@ static void amba_kmi_close(struct serio *io) clk_disable(kmi->clk); } -static int __devinit amba_kmi_probe(struct amba_device *dev, struct amba_id *id) +static int __devinit amba_kmi_probe(struct amba_device *dev, + const struct amba_id *id) { struct amba_kmi_port *kmi; struct serio *io; diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index 2d6de3e03e2d..67f17d61b978 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -713,7 +713,8 @@ static const struct mmc_host_ops mmci_ops = { .get_cd = mmci_get_cd, }; -static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id) +static int __devinit mmci_probe(struct amba_device *dev, + const struct amba_id *id) { struct mmci_platform_data *plat = dev->dev.platform_data; struct variant_data *variant = id->data; diff --git a/drivers/rtc/rtc-pl030.c b/drivers/rtc/rtc-pl030.c index bbdb2f02798a..baff724cd40f 100644 --- a/drivers/rtc/rtc-pl030.c +++ b/drivers/rtc/rtc-pl030.c @@ -103,7 +103,7 @@ static const struct rtc_class_ops pl030_ops = { .set_alarm = pl030_set_alarm, }; -static int pl030_probe(struct amba_device *dev, struct amba_id *id) +static int pl030_probe(struct amba_device *dev, const struct amba_id *id) { struct pl030_rtc *rtc; int ret; diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c index b7a6690e5b35..6568f4b37e19 100644 --- a/drivers/rtc/rtc-pl031.c +++ b/drivers/rtc/rtc-pl031.c @@ -358,7 +358,7 @@ static int pl031_remove(struct amba_device *adev) return 0; } -static int pl031_probe(struct amba_device *adev, struct amba_id *id) +static int pl031_probe(struct amba_device *adev, const struct amba_id *id) { int ret; struct pl031_local *ldata; diff --git a/drivers/spi/amba-pl022.c b/drivers/spi/amba-pl022.c index 71a1219a995d..95e58c70a2c9 100644 --- a/drivers/spi/amba-pl022.c +++ b/drivers/spi/amba-pl022.c @@ -2021,7 +2021,7 @@ static void pl022_cleanup(struct spi_device *spi) static int __devinit -pl022_probe(struct amba_device *adev, struct amba_id *id) +pl022_probe(struct amba_device *adev, const struct amba_id *id) { struct device *dev = &adev->dev; struct pl022_ssp_controller *platform_info = adev->dev.platform_data; diff --git a/drivers/tty/serial/amba-pl010.c b/drivers/tty/serial/amba-pl010.c index 2904aa044126..d742dd2c525c 100644 --- a/drivers/tty/serial/amba-pl010.c +++ b/drivers/tty/serial/amba-pl010.c @@ -676,7 +676,7 @@ static struct uart_driver amba_reg = { .cons = AMBA_CONSOLE, }; -static int pl010_probe(struct amba_device *dev, struct amba_id *id) +static int pl010_probe(struct amba_device *dev, const struct amba_id *id) { struct uart_amba_port *uap; void __iomem *base; diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index e76d7d000128..0dae46f91021 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -1349,7 +1349,7 @@ static struct uart_driver amba_reg = { .cons = AMBA_CONSOLE, }; -static int pl011_probe(struct amba_device *dev, struct amba_id *id) +static int pl011_probe(struct amba_device *dev, const struct amba_id *id) { struct uart_amba_port *uap; struct vendor_data *vendor = id->data; diff --git a/drivers/video/amba-clcd.c b/drivers/video/amba-clcd.c index 1c2c68356ea7..013c8ce57205 100644 --- a/drivers/video/amba-clcd.c +++ b/drivers/video/amba-clcd.c @@ -461,7 +461,7 @@ static int clcdfb_register(struct clcd_fb *fb) return ret; } -static int clcdfb_probe(struct amba_device *dev, struct amba_id *id) +static int clcdfb_probe(struct amba_device *dev, const struct amba_id *id) { struct clcd_board *board = dev->dev.platform_data; struct clcd_fb *fb; diff --git a/drivers/watchdog/sp805_wdt.c b/drivers/watchdog/sp805_wdt.c index 9127eda2145b..0a0efe713bc8 100644 --- a/drivers/watchdog/sp805_wdt.c +++ b/drivers/watchdog/sp805_wdt.c @@ -278,7 +278,7 @@ static struct miscdevice sp805_wdt_miscdev = { }; static int __devinit -sp805_wdt_probe(struct amba_device *adev, struct amba_id *id) +sp805_wdt_probe(struct amba_device *adev, const struct amba_id *id) { int ret = 0; diff --git a/include/linux/amba/bus.h b/include/linux/amba/bus.h index a0ccf28e9741..07b6374652dc 100644 --- a/include/linux/amba/bus.h +++ b/include/linux/amba/bus.h @@ -43,7 +43,7 @@ struct amba_id { struct amba_driver { struct device_driver drv; - int (*probe)(struct amba_device *, struct amba_id *); + int (*probe)(struct amba_device *, const struct amba_id *); int (*remove)(struct amba_device *); void (*shutdown)(struct amba_device *); int (*suspend)(struct amba_device *, pm_message_t); diff --git a/sound/arm/aaci.c b/sound/arm/aaci.c index 7c1fc64cb53d..d0821f8974a4 100644 --- a/sound/arm/aaci.c +++ b/sound/arm/aaci.c @@ -1011,7 +1011,8 @@ static unsigned int __devinit aaci_size_fifo(struct aaci *aaci) return i; } -static int __devinit aaci_probe(struct amba_device *dev, struct amba_id *id) +static int __devinit aaci_probe(struct amba_device *dev, + const struct amba_id *id) { struct aaci *aaci; int ret, i; -- cgit v1.2.3-70-g09d2 From 2d00880fa842e7dd34f5bb5eb3b5f8337b068be5 Mon Sep 17 00:00:00 2001 From: Russell King Date: Sat, 19 Feb 2011 15:55:48 +0000 Subject: ARM: amba: make amba_driver id_table const Now that the bus level code deals with a const id table, we can also make the ID table in the amba_driver structure also const. Signed-off-by: Russell King --- include/linux/amba/bus.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux/amba') diff --git a/include/linux/amba/bus.h b/include/linux/amba/bus.h index 07b6374652dc..227d590cd8d5 100644 --- a/include/linux/amba/bus.h +++ b/include/linux/amba/bus.h @@ -48,7 +48,7 @@ struct amba_driver { void (*shutdown)(struct amba_device *); int (*suspend)(struct amba_device *, pm_message_t); int (*resume)(struct amba_device *); - struct amba_id *id_table; + const struct amba_id *id_table; }; enum amba_vendor { -- cgit v1.2.3-70-g09d2 From ba74ec7f6b2bf9e1b5d0f2c5cef08766944cb2c8 Mon Sep 17 00:00:00 2001 From: Rabin Vincent Date: Wed, 23 Feb 2011 04:33:17 +0100 Subject: ARM: 6758/1: amba: support pm ops Support pm_ops in the AMBA bus, required to allow drivers to use runtime pm. The implementation of AMBA bus pm ops is based on the platform bus implementation. Acked-by: Rafael J. Wysocki Acked-by: Linus Walleij Signed-off-by: Rabin Vincent Signed-off-by: Russell King --- drivers/amba/bus.c | 340 +++++++++++++++++++++++++++++++++++++++++++---- include/linux/amba/bus.h | 2 + 2 files changed, 319 insertions(+), 23 deletions(-) (limited to 'include/linux/amba') diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c index 43088996a07a..6d2bb2524b6e 100644 --- a/drivers/amba/bus.c +++ b/drivers/amba/bus.c @@ -13,12 +13,13 @@ #include #include #include +#include +#include #include #include #include -#define to_amba_device(d) container_of(d, struct amba_device, dev) #define to_amba_driver(d) container_of(d, struct amba_driver, drv) static const struct amba_id * @@ -57,26 +58,6 @@ static int amba_uevent(struct device *dev, struct kobj_uevent_env *env) #define amba_uevent NULL #endif -static int amba_suspend(struct device *dev, pm_message_t state) -{ - struct amba_driver *drv = to_amba_driver(dev->driver); - int ret = 0; - - if (dev->driver && drv->suspend) - ret = drv->suspend(to_amba_device(dev), state); - return ret; -} - -static int amba_resume(struct device *dev) -{ - struct amba_driver *drv = to_amba_driver(dev->driver); - int ret = 0; - - if (dev->driver && drv->resume) - ret = drv->resume(to_amba_device(dev)); - return ret; -} - #define amba_attr_func(name,fmt,arg...) \ static ssize_t name##_show(struct device *_dev, \ struct device_attribute *attr, char *buf) \ @@ -102,6 +83,320 @@ static struct device_attribute amba_dev_attrs[] = { __ATTR_NULL, }; +#ifdef CONFIG_PM_SLEEP + +static int amba_legacy_suspend(struct device *dev, pm_message_t mesg) +{ + struct amba_driver *adrv = to_amba_driver(dev->driver); + struct amba_device *adev = to_amba_device(dev); + int ret = 0; + + if (dev->driver && adrv->suspend) + ret = adrv->suspend(adev, mesg); + + return ret; +} + +static int amba_legacy_resume(struct device *dev) +{ + struct amba_driver *adrv = to_amba_driver(dev->driver); + struct amba_device *adev = to_amba_device(dev); + int ret = 0; + + if (dev->driver && adrv->resume) + ret = adrv->resume(adev); + + return ret; +} + +static int amba_pm_prepare(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (drv && drv->pm && drv->pm->prepare) + ret = drv->pm->prepare(dev); + + return ret; +} + +static void amba_pm_complete(struct device *dev) +{ + struct device_driver *drv = dev->driver; + + if (drv && drv->pm && drv->pm->complete) + drv->pm->complete(dev); +} + +#else /* !CONFIG_PM_SLEEP */ + +#define amba_pm_prepare NULL +#define amba_pm_complete NULL + +#endif /* !CONFIG_PM_SLEEP */ + +#ifdef CONFIG_SUSPEND + +static int amba_pm_suspend(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->suspend) + ret = drv->pm->suspend(dev); + } else { + ret = amba_legacy_suspend(dev, PMSG_SUSPEND); + } + + return ret; +} + +static int amba_pm_suspend_noirq(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->suspend_noirq) + ret = drv->pm->suspend_noirq(dev); + } + + return ret; +} + +static int amba_pm_resume(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->resume) + ret = drv->pm->resume(dev); + } else { + ret = amba_legacy_resume(dev); + } + + return ret; +} + +static int amba_pm_resume_noirq(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->resume_noirq) + ret = drv->pm->resume_noirq(dev); + } + + return ret; +} + +#else /* !CONFIG_SUSPEND */ + +#define amba_pm_suspend NULL +#define amba_pm_resume NULL +#define amba_pm_suspend_noirq NULL +#define amba_pm_resume_noirq NULL + +#endif /* !CONFIG_SUSPEND */ + +#ifdef CONFIG_HIBERNATION + +static int amba_pm_freeze(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->freeze) + ret = drv->pm->freeze(dev); + } else { + ret = amba_legacy_suspend(dev, PMSG_FREEZE); + } + + return ret; +} + +static int amba_pm_freeze_noirq(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->freeze_noirq) + ret = drv->pm->freeze_noirq(dev); + } + + return ret; +} + +static int amba_pm_thaw(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->thaw) + ret = drv->pm->thaw(dev); + } else { + ret = amba_legacy_resume(dev); + } + + return ret; +} + +static int amba_pm_thaw_noirq(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->thaw_noirq) + ret = drv->pm->thaw_noirq(dev); + } + + return ret; +} + +static int amba_pm_poweroff(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->poweroff) + ret = drv->pm->poweroff(dev); + } else { + ret = amba_legacy_suspend(dev, PMSG_HIBERNATE); + } + + return ret; +} + +static int amba_pm_poweroff_noirq(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->poweroff_noirq) + ret = drv->pm->poweroff_noirq(dev); + } + + return ret; +} + +static int amba_pm_restore(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->restore) + ret = drv->pm->restore(dev); + } else { + ret = amba_legacy_resume(dev); + } + + return ret; +} + +static int amba_pm_restore_noirq(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->restore_noirq) + ret = drv->pm->restore_noirq(dev); + } + + return ret; +} + +#else /* !CONFIG_HIBERNATION */ + +#define amba_pm_freeze NULL +#define amba_pm_thaw NULL +#define amba_pm_poweroff NULL +#define amba_pm_restore NULL +#define amba_pm_freeze_noirq NULL +#define amba_pm_thaw_noirq NULL +#define amba_pm_poweroff_noirq NULL +#define amba_pm_restore_noirq NULL + +#endif /* !CONFIG_HIBERNATION */ + +#ifdef CONFIG_PM + +static const struct dev_pm_ops amba_pm = { + .prepare = amba_pm_prepare, + .complete = amba_pm_complete, + .suspend = amba_pm_suspend, + .resume = amba_pm_resume, + .freeze = amba_pm_freeze, + .thaw = amba_pm_thaw, + .poweroff = amba_pm_poweroff, + .restore = amba_pm_restore, + .suspend_noirq = amba_pm_suspend_noirq, + .resume_noirq = amba_pm_resume_noirq, + .freeze_noirq = amba_pm_freeze_noirq, + .thaw_noirq = amba_pm_thaw_noirq, + .poweroff_noirq = amba_pm_poweroff_noirq, + .restore_noirq = amba_pm_restore_noirq, + SET_RUNTIME_PM_OPS( + pm_generic_runtime_suspend, + pm_generic_runtime_resume, + pm_generic_runtime_idle + ) +}; + +#define AMBA_PM (&amba_pm) + +#else /* !CONFIG_PM */ + +#define AMBA_PM NULL + +#endif /* !CONFIG_PM */ + /* * Primecells are part of the Advanced Microcontroller Bus Architecture, * so we call the bus "amba". @@ -111,8 +406,7 @@ struct bus_type amba_bustype = { .dev_attrs = amba_dev_attrs, .match = amba_match, .uevent = amba_uevent, - .suspend = amba_suspend, - .resume = amba_resume, + .pm = AMBA_PM, }; static int __init amba_init(void) diff --git a/include/linux/amba/bus.h b/include/linux/amba/bus.h index 227d590cd8d5..fcbbe71a3cc1 100644 --- a/include/linux/amba/bus.h +++ b/include/linux/amba/bus.h @@ -58,6 +58,8 @@ enum amba_vendor { extern struct bus_type amba_bustype; +#define to_amba_device(d) container_of(d, struct amba_device, dev) + #define amba_get_drvdata(d) dev_get_drvdata(&d->dev) #define amba_set_drvdata(d,p) dev_set_drvdata(&d->dev, p) -- cgit v1.2.3-70-g09d2