lkml.org 
[lkml]   [2009]   [Jan]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH 07/10] sdhci: Add support for hosts that don't specify clocks in the cap. register
FSL eSDHC hosts don't provide clocks bits in the capabilities register,
instead we're getting clocks values from the device tree.

There is somewhat similar change[1] from Ben Dooks, the change adds
callbacks for getting the clocks. But for eSDHC the callbacks are
superfluous, since the clocks are static.

[1] http://lkml.org/lkml/2008/12/2/157

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
---
drivers/mmc/host/sdhci.c | 31 +++++++++++++++----------------
1 files changed, 15 insertions(+), 16 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 57b8ffe..9ac088a 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1693,24 +1693,23 @@ int sdhci_add_host(struct sdhci_host *host)
mmc_dev(host->mmc)->dma_mask = &host->dma_mask;
}

- host->max_clk =
- (caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
- if (host->max_clk == 0) {
- printk(KERN_ERR "%s: Hardware doesn't specify base clock "
- "frequency.\n", mmc_hostname(mmc));
- return -ENODEV;
+ if (!host->max_clk) {
+ host->max_clk = (caps & SDHCI_CLOCK_BASE_MASK) >>
+ SDHCI_CLOCK_BASE_SHIFT;
+ if (host->max_clk == 0) {
+ printk(KERN_ERR "%s: Hardware doesn't specify base "
+ "clock frequency.\n", mmc_hostname(mmc));
+ return -ENODEV;
+ }
+ host->max_clk *= 1000000;
}
- host->max_clk *= 1000000;

- host->timeout_clk =
- (caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
- if (host->timeout_clk == 0) {
- printk(KERN_ERR "%s: Hardware doesn't specify timeout clock "
- "frequency.\n", mmc_hostname(mmc));
- return -ENODEV;
+ if (!host->timeout_clk) {
+ host->timeout_clk = (caps & SDHCI_TIMEOUT_CLK_MASK) >>
+ SDHCI_TIMEOUT_CLK_SHIFT;
+ if (caps & SDHCI_TIMEOUT_CLK_UNIT)
+ host->timeout_clk *= 1000;
}
- if (caps & SDHCI_TIMEOUT_CLK_UNIT)
- host->timeout_clk *= 1000;

/*
* Set host parameters.
--
1.5.6.5


\
 
 \ /
  Last update: 2009-01-22 03:05    [from the cache]
©2003-2011 Jasper Spaans