diff options
Diffstat (limited to 'drivers/media/video/davinci/vpif.c')
| -rw-r--r-- | drivers/media/video/davinci/vpif.c | 45 |
1 files changed, 43 insertions, 2 deletions
diff --git a/drivers/media/video/davinci/vpif.c b/drivers/media/video/davinci/vpif.c index af9680273ff..b3637aff8fe 100644 --- a/drivers/media/video/davinci/vpif.c +++ b/drivers/media/video/davinci/vpif.c @@ -1,5 +1,5 @@ /* - * vpif - DM646x Video Port Interface driver + * vpif - Video Port Interface driver * VPIF is a receiver and transmitter for video data. It has two channels(0, 1) * that receiveing video byte stream and two channels(2, 3) for video output. * The hardware supports SDTV, HDTV formats, raw data capture. @@ -23,6 +23,8 @@ #include <linux/spinlock.h> #include <linux/kernel.h> #include <linux/io.h> +#include <linux/clk.h> +#include <linux/err.h> #include <mach/hardware.h> #include "vpif.h" @@ -40,6 +42,7 @@ static struct resource *res; spinlock_t vpif_lock; void __iomem *vpif_base; +struct clk *vpif_clk; /** * ch_params: video standard configuration parameters for vpif @@ -346,7 +349,7 @@ static void config_vpif_params(struct vpif_params *vpifparams, value = regr(reg); /* Set data width */ - value &= ((~(unsigned int)(0x3)) << + value &= ~(0x3u << VPIF_CH_DATA_WIDTH_BIT); value |= ((vpifparams->params.data_sz) << VPIF_CH_DATA_WIDTH_BIT); @@ -434,10 +437,19 @@ static int __init vpif_probe(struct platform_device *pdev) goto fail; } + vpif_clk = clk_get(&pdev->dev, "vpif"); + if (IS_ERR(vpif_clk)) { + status = PTR_ERR(vpif_clk); + goto clk_fail; + } + clk_enable(vpif_clk); + spin_lock_init(&vpif_lock); dev_info(&pdev->dev, "vpif probe success\n"); return 0; +clk_fail: + iounmap(vpif_base); fail: release_mem_region(res->start, res_len); return status; @@ -445,15 +457,44 @@ fail: static int __devexit vpif_remove(struct platform_device *pdev) { + if (vpif_clk) { + clk_disable(vpif_clk); + clk_put(vpif_clk); + } + iounmap(vpif_base); release_mem_region(res->start, res_len); return 0; } +#ifdef CONFIG_PM +static int vpif_suspend(struct device *dev) +{ + clk_disable(vpif_clk); + return 0; +} + +static int vpif_resume(struct device *dev) +{ + clk_enable(vpif_clk); + return 0; +} + +static const struct dev_pm_ops vpif_pm = { + .suspend = vpif_suspend, + .resume = vpif_resume, +}; + +#define vpif_pm_ops (&vpif_pm) +#else +#define vpif_pm_ops NULL +#endif + static struct platform_driver vpif_driver = { .driver = { .name = "vpif", .owner = THIS_MODULE, + .pm = vpif_pm_ops, }, .remove = __devexit_p(vpif_remove), .probe = vpif_probe, |