From 52f5336db2d6c32a807ca37cc1c45060a88a2506 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Wed, 29 Jun 2016 16:24:15 +0300 Subject: [PATCH] mmc: sdhci: Split sdhci_add_host() Split sdhci-add_host() in order to further our objective to make sdhci into a library. The split divides code that sets up mmc and sdhci parameters, from code that actually activates things - such as tasklet initialization, requesting the irq, and adding (and starting) the host. This gives drivers an opportunity to change various settings before committing to start the host. Drivers can continue to call sdhci_add_host() but drivers that want to take advantage of the split instead call sdhci_setup_host() followed by __sdhci_add_host(). Signed-off-by: Adrian Hunter Signed-off-by: Ulf Hansson --- drivers/mmc/host/sdhci.c | 39 ++++++++++++++++++++++++++++++++++++--- drivers/mmc/host/sdhci.h | 2 ++ 2 files changed, 38 insertions(+), 3 deletions(-) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 7009c862ca9b..22061faf7fa4 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2833,7 +2833,7 @@ static int sdhci_set_dma_mask(struct sdhci_host *host) return ret; } -int sdhci_add_host(struct sdhci_host *host) +int sdhci_setup_host(struct sdhci_host *host) { struct mmc_host *mmc; u32 caps[2] = {0, 0}; @@ -3314,6 +3314,28 @@ int sdhci_add_host(struct sdhci_host *host) */ mmc->max_blk_count = (host->quirks & SDHCI_QUIRK_NO_MULTIBLOCK) ? 1 : 65535; + return 0; + +unreg: + if (!IS_ERR(mmc->supply.vqmmc)) + regulator_disable(mmc->supply.vqmmc); +undma: + if (host->align_buffer) + dma_free_coherent(mmc_dev(mmc), host->align_buffer_sz + + host->adma_table_sz, host->align_buffer, + host->align_addr); + host->adma_table = NULL; + host->align_buffer = NULL; + + return ret; +} +EXPORT_SYMBOL_GPL(sdhci_setup_host); + +int __sdhci_add_host(struct sdhci_host *host) +{ + struct mmc_host *mmc = host->mmc; + int ret; + /* * Init tasklets. */ @@ -3370,10 +3392,10 @@ unirq: free_irq(host->irq, host); untasklet: tasklet_kill(&host->finish_tasklet); -unreg: + if (!IS_ERR(mmc->supply.vqmmc)) regulator_disable(mmc->supply.vqmmc); -undma: + if (host->align_buffer) dma_free_coherent(mmc_dev(mmc), host->align_buffer_sz + host->adma_table_sz, host->align_buffer, @@ -3383,7 +3405,18 @@ undma: return ret; } +EXPORT_SYMBOL_GPL(__sdhci_add_host); + +int sdhci_add_host(struct sdhci_host *host) +{ + int ret; + + ret = sdhci_setup_host(host); + if (ret) + return ret; + return __sdhci_add_host(host); +} EXPORT_SYMBOL_GPL(sdhci_add_host); void sdhci_remove_host(struct sdhci_host *host, int dead) diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 609f87ca536b..b16aec2faa2e 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -645,6 +645,8 @@ static inline void *sdhci_priv(struct sdhci_host *host) } extern void sdhci_card_detect(struct sdhci_host *host); +extern int sdhci_setup_host(struct sdhci_host *host); +extern int __sdhci_add_host(struct sdhci_host *host); extern int sdhci_add_host(struct sdhci_host *host); extern void sdhci_remove_host(struct sdhci_host *host, int dead); extern void sdhci_send_command(struct sdhci_host *host, -- 2.20.1