diff options
author | Adrian Hunter <adrian.hunter@nokia.com> | 2009-09-22 23:45:02 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 14:39:36 (GMT) |
commit | 2bec08937e3cdf6828d29421c7f870dca84f3b02 (patch) | |
tree | 1c6dc84d86515e347fc70c3f4d664d341f2ffc59 /drivers | |
parent | b62f622812c5aaacad217fd8f4445562b917df6d (diff) | |
download | linux-fsl-qoriq-2bec08937e3cdf6828d29421c7f870dca84f3b02.tar.xz |
omap_hsmmc: ensure all clock enables and disables are paired
[madhu.cr@ti.com: fix for the db clock failure message]
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Acked-by: Matt Fleming <matt@console-pimps.org>
Cc: Ian Molton <ian@mnementh.co.uk>
Cc: "Roberto A. Foglietta" <roberto.foglietta@gmail.com>
Cc: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Cc: Denis Karpov <ext-denis.2.karpov@nokia.com>
Cc: Pierre Ossman <pierre@ossman.eu>
Cc: Philip Langdale <philipl@overt.org>
Cc: "Madhusudhan" <madhu.cr@ti.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Madhusudhan Chikkature <madhu.cr@ti.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/mmc/host/omap_hsmmc.c | 60 |
1 files changed, 33 insertions, 27 deletions
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index a20fafe..14c58ca 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -162,7 +162,7 @@ struct omap_hsmmc_host { int use_dma, dma_ch; int dma_line_tx, dma_line_rx; int slot_id; - int dbclk_enabled; + int got_dbclk; int response_busy; int context_loss; int dpm_state; @@ -742,22 +742,24 @@ static int omap_hsmmc_switch_opcond(struct omap_hsmmc_host *host, int vdd) /* Disable the clocks */ clk_disable(host->fclk); clk_disable(host->iclk); - clk_disable(host->dbclk); + if (host->got_dbclk) + clk_disable(host->dbclk); /* Turn the power off */ ret = mmc_slot(host).set_power(host->dev, host->slot_id, 0, 0); - if (ret != 0) - goto err; /* Turn the power ON with given VDD 1.8 or 3.0v */ - ret = mmc_slot(host).set_power(host->dev, host->slot_id, 1, vdd); + if (!ret) + ret = mmc_slot(host).set_power(host->dev, host->slot_id, 1, + vdd); + clk_enable(host->iclk); + clk_enable(host->fclk); + if (host->got_dbclk) + clk_enable(host->dbclk); + if (ret != 0) goto err; - clk_enable(host->fclk); - clk_enable(host->iclk); - clk_enable(host->dbclk); - OMAP_HSMMC_WRITE(host->base, HCTL, OMAP_HSMMC_READ(host->base, HCTL) & SDVSCLR); reg_val = OMAP_HSMMC_READ(host->base, HCTL); @@ -1695,18 +1697,22 @@ static int __init omap_hsmmc_probe(struct platform_device *pdev) goto err1; } - host->dbclk = clk_get(&pdev->dev, "mmchsdb_fck"); - /* - * MMC can still work without debounce clock. - */ - if (IS_ERR(host->dbclk)) - dev_warn(mmc_dev(host->mmc), "Failed to get debounce clock\n"); - else - if (clk_enable(host->dbclk) != 0) - dev_dbg(mmc_dev(host->mmc), "Enabling debounce" - " clk failed\n"); + if (cpu_is_omap2430()) { + host->dbclk = clk_get(&pdev->dev, "mmchsdb_fck"); + /* + * MMC can still work without debounce clock. + */ + if (IS_ERR(host->dbclk)) + dev_warn(mmc_dev(host->mmc), + "Failed to get debounce clock\n"); else - host->dbclk_enabled = 1; + host->got_dbclk = 1; + + if (host->got_dbclk) + if (clk_enable(host->dbclk) != 0) + dev_dbg(mmc_dev(host->mmc), "Enabling debounce" + " clk failed\n"); + } /* Since we do only SG emulation, we can have as many segs * as we want. */ @@ -1820,7 +1826,7 @@ err_irq: clk_disable(host->iclk); clk_put(host->fclk); clk_put(host->iclk); - if (host->dbclk_enabled) { + if (host->got_dbclk) { clk_disable(host->dbclk); clk_put(host->dbclk); } @@ -1854,7 +1860,7 @@ static int omap_hsmmc_remove(struct platform_device *pdev) clk_disable(host->iclk); clk_put(host->fclk); clk_put(host->iclk); - if (host->dbclk_enabled) { + if (host->got_dbclk) { clk_disable(host->dbclk); clk_put(host->dbclk); } @@ -1905,7 +1911,8 @@ static int omap_hsmmc_suspend(struct platform_device *pdev, pm_message_t state) OMAP_HSMMC_READ(host->base, HCTL) & ~SDBP); mmc_host_disable(host->mmc); clk_disable(host->iclk); - clk_disable(host->dbclk); + if (host->got_dbclk) + clk_disable(host->dbclk); } else { host->suspended = 0; if (host->pdata->resume) { @@ -1936,15 +1943,14 @@ static int omap_hsmmc_resume(struct platform_device *pdev) if (ret) goto clk_en_err; - if (clk_enable(host->dbclk) != 0) - dev_dbg(mmc_dev(host->mmc), - "Enabling debounce clk failed\n"); - if (mmc_host_enable(host->mmc) != 0) { clk_disable(host->iclk); goto clk_en_err; } + if (host->got_dbclk) + clk_enable(host->dbclk); + omap_hsmmc_conf_bus_power(host); if (host->pdata->resume) { |