On 02/03/17 11:47, Yangbo Lu wrote:
> Add a callback for signal voltage switching to let host driver
> switch signal voltage in its own way.
That is not how we do things now. Please just replace the host operation
instead e.g.
host->mmc_host_ops.start_signal_voltage_switch =
esdhc_signal_voltage_switch;
>
> Signed-off-by: Yangbo Lu <yangbo.lu@xxxxxxx>
> ---
> drivers/mmc/host/sdhci.c | 6 ++++++
> drivers/mmc/host/sdhci.h | 2 ++
> 2 files changed, 8 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index 6fdd7a7..3c9a924 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -1852,6 +1852,12 @@ static int sdhci_start_signal_voltage_switch(struct mmc_host *mmc,
> if (host->version < SDHCI_SPEC_300)
> return 0;
>
> + if (host->ops->start_signal_voltage_switch) {
> + ret = host->ops->start_signal_voltage_switch(
> + host, ios->signal_voltage);
> + return ret;
> + }
> +
> ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
>
> switch (ios->signal_voltage) {
> diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
> index edf3adf..04af687 100644
> --- a/drivers/mmc/host/sdhci.h
> +++ b/drivers/mmc/host/sdhci.h
> @@ -566,6 +566,8 @@ struct sdhci_ops {
> struct mmc_card *card,
> unsigned int max_dtr, int host_drv,
> int card_drv, int *drv_type);
> + int (*start_signal_voltage_switch)(struct sdhci_host *host,
> + unsigned char signal_voltage);
> };
>
> #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
>
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