diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-06 16:50:35 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-06 16:50:35 -0800 |
commit | 3c0cb7c31c206aaedb967e44b98442bbeb17a6c4 (patch) | |
tree | 3ecba45d7ffae4fba4a5aafaef4af5b0b1105bde /drivers/amba | |
parent | f70f5b9dc74ca7d0a64c4ead3fb28da09dc1b234 (diff) | |
parent | 404a02cbd2ae8bf256a2fa1169bdfe86bb5ebb34 (diff) |
Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (416 commits)
ARM: DMA: add support for DMA debugging
ARM: PL011: add DMA burst threshold support for ST variants
ARM: PL011: Add support for transmit DMA
ARM: PL011: Ensure IRQs are disabled in UART interrupt handler
ARM: PL011: Separate hardware FIFO size from TTY FIFO size
ARM: PL011: Allow better handling of vendor data
ARM: PL011: Ensure error flags are clear at startup
ARM: PL011: include revision number in boot-time port printk
ARM: vexpress: add sched_clock() for Versatile Express
ARM i.MX53: Make MX53 EVK bootable
ARM i.MX53: Some bug fix about MX53 MSL code
ARM: 6607/1: sa1100: Update platform device registration
ARM: 6606/1: sa1100: Fix platform device registration
ARM i.MX51: rename IPU irqs
ARM i.MX51: Add ipu clock support
ARM: imx/mx27_3ds: Add PMIC support
ARM: DMA: Replace page_to_dma()/dma_to_page() with pfn_to_dma()/dma_to_pfn()
mx51: fix usb clock support
MX51: Add support for usb host 2
arch/arm/plat-mxc/ehci.c: fix errors/typos
...
Diffstat (limited to 'drivers/amba')
-rw-r--r-- | drivers/amba/bus.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c index 2737b975220..e7df019d29d 100644 --- a/drivers/amba/bus.c +++ b/drivers/amba/bus.c @@ -147,6 +147,39 @@ static void amba_put_disable_pclk(struct amba_device *pcdev) clk_put(pclk); } +static int amba_get_enable_vcore(struct amba_device *pcdev) +{ + struct regulator *vcore = regulator_get(&pcdev->dev, "vcore"); + int ret; + + pcdev->vcore = vcore; + + if (IS_ERR(vcore)) { + /* It is OK not to supply a vcore regulator */ + if (PTR_ERR(vcore) == -ENODEV) + return 0; + return PTR_ERR(vcore); + } + + ret = regulator_enable(vcore); + if (ret) { + regulator_put(vcore); + pcdev->vcore = ERR_PTR(-ENODEV); + } + + return ret; +} + +static void amba_put_disable_vcore(struct amba_device *pcdev) +{ + struct regulator *vcore = pcdev->vcore; + + if (!IS_ERR(vcore)) { + regulator_disable(vcore); + regulator_put(vcore); + } +} + /* * These are the device model conversion veneers; they convert the * device model structures to our more specific structures. @@ -159,6 +192,10 @@ static int amba_probe(struct device *dev) int ret; do { + ret = amba_get_enable_vcore(pcdev); + if (ret) + break; + ret = amba_get_enable_pclk(pcdev); if (ret) break; @@ -168,6 +205,7 @@ static int amba_probe(struct device *dev) break; amba_put_disable_pclk(pcdev); + amba_put_disable_vcore(pcdev); } while (0); return ret; @@ -180,6 +218,7 @@ static int amba_remove(struct device *dev) int ret = drv->remove(pcdev); amba_put_disable_pclk(pcdev); + amba_put_disable_vcore(pcdev); return ret; } |