diff options
| author | Ben Dooks <ben-linux@fluff.org> | 2009-03-17 00:13:57 +0300 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2009-03-24 23:30:09 +0300 |
| commit | 4240ff0a02cb52f7d10dc1df6d82ba9c27dba07b (patch) | |
| tree | 99d88747457b500fe975832d6e721f76ec4e70c0 /drivers/mmc/host/sdhci.c | |
| parent | c5075a1089e808d8f471ce21b02810cc98ab2692 (diff) | |
| download | linux-4240ff0a02cb52f7d10dc1df6d82ba9c27dba07b.tar.xz | |
sdhci: Add get_{max,timeout}_clock callbacks
Some controllers do not provide clock information in their capabilities
(in the Samsung case, it is because there are multiple clock sources
available to the controller). Add hooks to allow the system to supply
clock information.
p.s.
In the original Ben's patch there was a bug that makes sdhci_add_host()
return -ENODEV even if callbacks were specified. This is fixed now.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc/host/sdhci.c')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index c814220d214e..34ab77bd12ae 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1674,19 +1674,27 @@ int sdhci_add_host(struct sdhci_host *host) host->max_clk = (caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT; + host->max_clk *= 1000000; if (host->max_clk == 0) { - printk(KERN_ERR "%s: Hardware doesn't specify base clock " - "frequency.\n", mmc_hostname(mmc)); - return -ENODEV; + if (!host->ops->get_max_clock) { + printk(KERN_ERR + "%s: Hardware doesn't specify base clock " + "frequency.\n", mmc_hostname(mmc)); + return -ENODEV; + } + host->max_clk = host->ops->get_max_clock(host); } - 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->ops->get_timeout_clock) { + printk(KERN_ERR + "%s: Hardware doesn't specify timeout clock " + "frequency.\n", mmc_hostname(mmc)); + return -ENODEV; + } + host->timeout_clk = host->ops->get_timeout_clock(host); } if (caps & SDHCI_TIMEOUT_CLK_UNIT) host->timeout_clk *= 1000; |