diff options
| author | Robby Cai <r63905@freescale.com> | 2009-10-10 16:30:06 +0800 |
|---|---|---|
| committer | Alejandro Gonzalez <alex.gonzalez@digi.com> | 2010-02-12 17:19:19 +0100 |
| commit | 1b830502003614bc4a328abe6291dbb47c5d14bb (patch) | |
| tree | 5ada195b3d700cc1335e10649404cfefadf9d103 /drivers/media/video/pxp.c | |
| parent | 6bed85a30de198de8eb9f463dcd7ffa9dcfb5280 (diff) | |
ENGR00116416-1 reset PXP module when it's inactive
Putting PXP in reset state gains the lowest power.
Restrore the PXP regs once PXP comes out of reset state.
Signed-off-by: Robby Cai <r63905@freescale.com>
Diffstat (limited to 'drivers/media/video/pxp.c')
| -rw-r--r-- | drivers/media/video/pxp.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/media/video/pxp.c b/drivers/media/video/pxp.c index 0c9d858630be..02b1fe3b364e 100644 --- a/drivers/media/video/pxp.c +++ b/drivers/media/video/pxp.c @@ -47,6 +47,14 @@ #define V4L2_OUTPUT_TYPE_INTERNAL 4 +#define REG_OFFSET 0x10 +#define REGS1_NUMS 16 +#define REGS2_NUMS 5 +#define REGS3_NUMS 32 +static u32 regs1[REGS1_NUMS]; +static u32 regs2[REGS2_NUMS]; +static u32 regs3[REGS3_NUMS]; + static struct pxp_data_format pxp_s0_formats[] = { { .name = "24-bit RGB", @@ -1204,12 +1212,59 @@ static int __devexit pxp_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM +static int pxp_suspend(struct platform_device *pdev, pm_message_t state) +{ + int i; + + while (HW_PXP_CTRL_RD() & BM_PXP_CTRL_ENABLE) + ; + + for (i = 0; i < REGS1_NUMS; i++) + regs1[i] = __raw_readl(HW_PXP_CTRL_ADDR + REG_OFFSET * i); + + for (i = 0; i < REGS2_NUMS; i++) + regs2[i] = __raw_readl(HW_PXP_PAGETABLE_ADDR + REG_OFFSET * i); + + for (i = 0; i < REGS3_NUMS; i++) + regs3[i] = __raw_readl(HW_PXP_OL0_ADDR + REG_OFFSET * i); + + HW_PXP_CTRL_SET(BM_PXP_CTRL_SFTRST); + + return 0; +} + +static int pxp_resume(struct platform_device *pdev) +{ + int i; + + /* Pull PxP out of reset */ + HW_PXP_CTRL_WR(0); + + for (i = 0; i < REGS1_NUMS; i++) + __raw_writel(regs1[i], HW_PXP_CTRL_ADDR + REG_OFFSET * i); + + for (i = 0; i < REGS2_NUMS; i++) + __raw_writel(regs2[i], HW_PXP_PAGETABLE_ADDR + REG_OFFSET * i); + + for (i = 0; i < REGS3_NUMS; i++) + __raw_writel(regs3[i], HW_PXP_OL0_ADDR + REG_OFFSET * i); + + return 0; +} +#else +#define pxp_suspend NULL +#define pxp_resume NULL +#endif + static struct platform_driver pxp_driver = { .driver = { .name = PXP_DRIVER_NAME, }, .probe = pxp_probe, .remove = __exit_p(pxp_remove), + .suspend = pxp_suspend, + .resume = pxp_resume, }; |