Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=64eb036af42d3816364c4db49d93be3a4614389c
Commit: 64eb036af42d3816364c4db49d93be3a4614389c
Parent: 9e2697ff371b4380dca108a66860868c19d8c4b6
Author: Bridge Wu <[EMAIL PROTECTED]>
AuthorDate: Thu Dec 13 07:24:30 2007 +0100
Committer: Russell King <[EMAIL PROTECTED]>
CommitDate: Sat Jan 26 15:07:52 2008 +0000
[ARM] 4709/1: pxa: mmc: add 26MHz support for pxa3[0|1]0 mmc controller
pxa3[0|1]0 mmc controller can support 26MHz clock mode, they support
SD spec 1.1 and MMC spec 4.0 which specify high speed mode. So host
caps will include MMC_CAP_MMC_HIGHSPEED and MMC_CAP_SD_HIGHSPEED for
pxa3[0|1]0.
This patch is to add 26MHz support for them. pxa host clock will be
set to 26MHz mode when the card supported max clock rate is higher
than or equal to 26MHz.
Signed-off-by: Bridge Wu <[EMAIL PROTECTED]>
Acked-by: Pierre Ossman <[EMAIL PROTECTED]>
Signed-off-by: Russell King <[EMAIL PROTECTED]>
---
drivers/mmc/host/pxamci.c | 31 ++++++++++++++++++++++---------
1 files changed, 22 insertions(+), 9 deletions(-)
diff --git a/drivers/mmc/host/pxamci.c b/drivers/mmc/host/pxamci.c
index 1654a33..80df4b0 100644
--- a/drivers/mmc/host/pxamci.c
+++ b/drivers/mmc/host/pxamci.c
@@ -375,14 +375,23 @@ static void pxamci_set_ios(struct mmc_host *mmc, struct
mmc_ios *ios)
if (host->clkrt == CLKRT_OFF)
clk_enable(host->clk);
- /*
- * clk might result in a lower divisor than we
- * desire. check for that condition and adjust
- * as appropriate.
- */
- if (rate / clk > ios->clock)
- clk <<= 1;
- host->clkrt = fls(clk) - 1;
+ if (ios->clock == 26000000) {
+ /* to support 26MHz on pxa300/pxa310 */
+ host->clkrt = 7;
+ } else {
+ /* to handle (19.5MHz, 26MHz) */
+ if (!clk)
+ clk = 1;
+
+ /*
+ * clk might result in a lower divisor than we
+ * desire. check for that condition and adjust
+ * as appropriate.
+ */
+ if (rate / clk > ios->clock)
+ clk <<= 1;
+ host->clkrt = fls(clk) - 1;
+ }
/*
* we write clkrt on the next command
@@ -519,7 +528,8 @@ static int pxamci_probe(struct platform_device *pdev)
* Calculate minimum clock rate, rounding up.
*/
mmc->f_min = (host->clkrate + 63) / 64;
- mmc->f_max = host->clkrate;
+ mmc->f_max = (cpu_is_pxa300() || cpu_is_pxa310()) ? 26000000
+ : host->clkrate;
mmc->ocr_avail = host->pdata ?
host->pdata->ocr_mask :
@@ -529,6 +539,9 @@ static int pxamci_probe(struct platform_device *pdev)
if (!cpu_is_pxa21x() && !cpu_is_pxa25x()) {
mmc->caps |= MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ;
host->cmdat |= CMDAT_SDIO_INT_EN;
+ if (cpu_is_pxa300() || cpu_is_pxa310())
+ mmc->caps |= MMC_CAP_MMC_HIGHSPEED |
+ MMC_CAP_SD_HIGHSPEED;
}
host->sg_cpu = dma_alloc_coherent(&pdev->dev, PAGE_SIZE, &host->sg_dma,
GFP_KERNEL);
-
To unsubscribe from this list: send the line "unsubscribe git-commits-head" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
