diff options
Diffstat (limited to 'drivers/mmc/host/s3cmci.c')
| -rw-r--r-- | drivers/mmc/host/s3cmci.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c index bf4df3a82f8..45f5e21a100 100644 --- a/drivers/mmc/host/s3cmci.c +++ b/drivers/mmc/host/s3cmci.c @@ -56,6 +56,8 @@ static const int dbgmap_err = dbg_fail; static const int dbgmap_info = dbg_info | dbg_conf; static const int dbgmap_debug = dbg_err | dbg_debug; +static int f_max = -1; /* override maximum frequency limit */ + #define dbg(host, channels, args...) \ do { \ if (dbgmap_err & channels) \ @@ -1394,6 +1396,18 @@ static int __devinit s3cmci_probe(struct platform_device *pdev, int is2440) mmc->f_min = host->clk_rate / (host->clk_div * 256); mmc->f_max = host->clk_rate / host->clk_div; + if (f_max >= 0) { + unsigned f = f_max; + + if (f < mmc->f_min) + f = mmc->f_min; + if (mmc->f_max > f) { + dev_info(&pdev->dev, "f_max lowered from %u to %u Hz\n", + mmc->f_max, f); + mmc->f_max = f; + } + } + if (host->pdata->ocr_avail) mmc->ocr_avail = host->pdata->ocr_avail; @@ -1575,6 +1589,8 @@ static void __exit s3cmci_exit(void) module_init(s3cmci_init); module_exit(s3cmci_exit); +module_param(f_max, int, 0644) + MODULE_DESCRIPTION("Samsung S3C MMC/SD Card Interface driver"); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Thomas Kleffel <tk@maintech.de>, Ben Dooks <ben-linux@fluff.org>"); |