diff options
| author | Jaehoon Chung <jh80.chung@samsung.com> | 2011-02-25 02:08:14 (GMT) |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2011-03-17 19:35:22 (GMT) |
| commit | c07946a3350244d7c3d9bc1032325e04dd11575b (patch) | |
| tree | 8cab4261ebbdb857e7f46fe2dc6ed3d4652369f4 /drivers/mmc/host | |
| parent | e61cf1184d72e574460492fd6c6b6d8a3ace2089 (diff) | |
| download | linux-c07946a3350244d7c3d9bc1032325e04dd11575b.tar.xz | |
mmc: dw_mmc: support mmc power control with regulator
This patch adds support for power regulators.
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Will Newton <will.newton@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host')
| -rw-r--r-- | drivers/mmc/host/dw_mmc.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index 51ee2f5..5a61406 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -32,6 +32,7 @@ #include <linux/mmc/mmc.h> #include <linux/mmc/dw_mmc.h> #include <linux/bitops.h> +#include <linux/regulator/consumer.h> #include "dw_mmc.h" @@ -1440,6 +1441,13 @@ static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id) } #endif /* CONFIG_MMC_DW_IDMAC */ + host->vmmc = regulator_get(mmc_dev(mmc), "vmmc"); + if (IS_ERR(host->vmmc)) { + printk(KERN_INFO "%s: no vmmc regulator found\n", mmc_hostname(mmc)); + host->vmmc = NULL; + } else + regulator_enable(host->vmmc); + if (dw_mci_get_cd(mmc)) set_bit(DW_MMC_CARD_PRESENT, &slot->flags); else @@ -1704,6 +1712,12 @@ err_dmaunmap: host->sg_cpu, host->sg_dma); iounmap(host->regs); + if (host->vmmc) { + regulator_disable(host->vmmc); + regulator_put(host->vmmc); + } + + err_freehost: kfree(host); return ret; @@ -1735,6 +1749,11 @@ static int __exit dw_mci_remove(struct platform_device *pdev) if (host->use_dma && host->dma_ops->exit) host->dma_ops->exit(host); + if (host->vmmc) { + regulator_disable(host->vmmc); + regulator_put(host->vmmc); + } + iounmap(host->regs); kfree(host); @@ -1750,6 +1769,9 @@ static int dw_mci_suspend(struct platform_device *pdev, pm_message_t mesg) int i, ret; struct dw_mci *host = platform_get_drvdata(pdev); + if (host->vmmc) + regulator_enable(host->vmmc); + for (i = 0; i < host->num_slots; i++) { struct dw_mci_slot *slot = host->slot[i]; if (!slot) @@ -1765,6 +1787,9 @@ static int dw_mci_suspend(struct platform_device *pdev, pm_message_t mesg) } } + if (host->vmmc) + regulator_disable(host->vmmc); + return 0; } |