From 9d967a61b4fc77b12f4b038a9345b5cda5bb2a7a Mon Sep 17 00:00:00 2001 From: Vincent Yang Date: Tue, 20 Jan 2015 16:05:15 +0800 Subject: [PATCH] mmc: sdhci: add a voltage switch callback function This patch adds a callback function to do controller-specific actions when switching voltages. It is a preparation and will be used by Fujitsu SDHCI controller f_sdh30 driver. Signed-off-by: Vincent Yang Signed-off-by: Ulf Hansson --- drivers/mmc/host/sdhci.c | 4 ++++ drivers/mmc/host/sdhci.h | 1 + 2 files changed, 5 insertions(+) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 8b0c7d6ea04b..3e4fe967d7e5 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1829,6 +1829,10 @@ static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host, ctrl |= SDHCI_CTRL_VDD_180; sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); + /* Some controller need to do more when switching */ + if (host->ops->voltage_switch) + host->ops->voltage_switch(host); + /* 1.8V regulator output should be stable within 5 ms */ ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); if (ctrl & SDHCI_CTRL_VDD_180) diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 41a2c34299ed..0315e1844330 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -339,6 +339,7 @@ struct sdhci_ops { void (*adma_workaround)(struct sdhci_host *host, u32 intmask); void (*platform_init)(struct sdhci_host *host); void (*card_event)(struct sdhci_host *host); + void (*voltage_switch)(struct sdhci_host *host); }; #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS -- 2.34.1