diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-04-25 15:57:07 +0400 |
|---|---|---|
| committer | Chris Ball <chris@printf.net> | 2014-05-22 15:26:27 +0400 |
| commit | 2317f56c055fcad524bf6a873df48a754e7ebc4d (patch) | |
| tree | 7b98b1deb93326d1dd2a5410d35a054d497a4ec3 /drivers/mmc/host/sdhci.c | |
| parent | 5b4f1f6c496aa3a90b617d1319274bf2017e639d (diff) | |
| download | linux-2317f56c055fcad524bf6a873df48a754e7ebc4d.tar.xz | |
mmc: sdhci: convert generic bus width setup to library function
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-by: Markus Pargmann <mpa@pengutronix.de>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <chris@printf.net>
Diffstat (limited to 'drivers/mmc/host/sdhci.c')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 45 |
1 files changed, 22 insertions, 23 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 8cd20ef0a9cb..15f6c5e08e9d 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1413,6 +1413,27 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq) spin_unlock_irqrestore(&host->lock, flags); } +void sdhci_set_bus_width(struct sdhci_host *host, int width) +{ + u8 ctrl; + + ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); + if (width == MMC_BUS_WIDTH_8) { + ctrl &= ~SDHCI_CTRL_4BITBUS; + if (host->version >= SDHCI_SPEC_300) + ctrl |= SDHCI_CTRL_8BITBUS; + } else { + if (host->version >= SDHCI_SPEC_300) + ctrl &= ~SDHCI_CTRL_8BITBUS; + if (width == MMC_BUS_WIDTH_4) + ctrl |= SDHCI_CTRL_4BITBUS; + else + ctrl &= ~SDHCI_CTRL_4BITBUS; + } + sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); +} +EXPORT_SYMBOL_GPL(sdhci_set_bus_width); + static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios) { unsigned long flags; @@ -1458,29 +1479,7 @@ static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios) if (host->ops->platform_send_init_74_clocks) host->ops->platform_send_init_74_clocks(host, ios->power_mode); - /* - * If your platform has 8-bit width support but is not a v3 controller, - * or if it requires special setup code, you should implement that in - * platform_bus_width(). - */ - if (host->ops->platform_bus_width) { - host->ops->platform_bus_width(host, ios->bus_width); - } else { - ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); - if (ios->bus_width == MMC_BUS_WIDTH_8) { - ctrl &= ~SDHCI_CTRL_4BITBUS; - if (host->version >= SDHCI_SPEC_300) - ctrl |= SDHCI_CTRL_8BITBUS; - } else { - if (host->version >= SDHCI_SPEC_300) - ctrl &= ~SDHCI_CTRL_8BITBUS; - if (ios->bus_width == MMC_BUS_WIDTH_4) - ctrl |= SDHCI_CTRL_4BITBUS; - else - ctrl &= ~SDHCI_CTRL_4BITBUS; - } - sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); - } + host->ops->set_bus_width(host, ios->bus_width); ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); |