diff options
| author | R Raj Kumar <rrajk@nvidia.com> | 2014-01-08 16:42:41 +0530 |
|---|---|---|
| committer | R Raj Kumar <rrajk@nvidia.com> | 2014-01-09 01:10:41 -0800 |
| commit | 41f0aeb44644e331dc0414c564b9cbc739afece4 (patch) | |
| tree | 9afe6abba73541ebd26fac74ce39e271f520aee9 /drivers | |
| parent | 4ecd5ac1204847401082c612878a028566ca456f (diff) | |
mmc: tegra: Verify return status of clock APIs
Added debug prints for verifying the return status of
clock APIs that are used in the sdhci driver.
Bug 1424839
Change-Id: Ifd5999314a2809d8995f9640bc730f1797ed8dee
Signed-off-by: R Raj Kumar <rrajk@nvidia.com>
Reviewed-on: http://git-master/r/353275
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Venu Byravarasu <vbyravarasu@nvidia.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/host/sdhci-tegra.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c index 5d83c64d3c08..98c479a855f9 100644 --- a/drivers/mmc/host/sdhci-tegra.c +++ b/drivers/mmc/host/sdhci-tegra.c @@ -1228,6 +1228,7 @@ static void tegra_sdhci_set_clock(struct sdhci_host *sdhci, unsigned int clock) struct sdhci_tegra *tegra_host = pltfm_host->priv; struct platform_device *pdev = to_platform_device(mmc_dev(sdhci->mmc)); u8 ctrl; + int ret = 0; mutex_lock(&tegra_host->set_clock_mutex); pr_debug("%s %s %u enabled=%u\n", __func__, @@ -1235,7 +1236,12 @@ static void tegra_sdhci_set_clock(struct sdhci_host *sdhci, unsigned int clock) if (clock) { if (!tegra_host->clk_enabled) { pm_runtime_get_sync(&pdev->dev); - clk_prepare_enable(pltfm_host->clk); + ret = clk_prepare_enable(pltfm_host->clk); + if (ret) { + dev_err(mmc_dev(sdhci->mmc), + "clock enable is failed, ret: %d\n", ret); + return; + } tegra_host->clk_enabled = true; sdhci->is_clk_on = tegra_host->clk_enabled; ctrl = sdhci_readb(sdhci, SDHCI_VNDR_CLK_CTRL); @@ -1245,11 +1251,21 @@ static void tegra_sdhci_set_clock(struct sdhci_host *sdhci, unsigned int clock) tegra_sdhci_set_clk_rate(sdhci, clock); if (tegra_host->emc_clk && (!tegra_host->is_sdmmc_emc_clk_on)) { - clk_prepare_enable(tegra_host->emc_clk); + ret = clk_prepare_enable(tegra_host->emc_clk); + if (ret) { + dev_err(mmc_dev(sdhci->mmc), + "clock enable is failed, ret: %d\n", ret); + return; + } tegra_host->is_sdmmc_emc_clk_on = true; } if (tegra_host->sclk && (!tegra_host->is_sdmmc_sclk_on)) { - clk_prepare_enable(tegra_host->sclk); + ret = clk_prepare_enable(tegra_host->sclk); + if (ret) { + dev_err(mmc_dev(sdhci->mmc), + "clock enable is failed, ret: %d\n", ret); + return; + } tegra_host->is_sdmmc_sclk_on = true; } } else if (!clock && tegra_host->clk_enabled) { |