On 04/04/16 18:27, Ludovic Desroches wrote:
> In order to remove the SDHCI_QUIRK2_NEED_DELAY_AFTER_INT_CLK_RST and to
> reduce code duplication, put the code relative to the SD clock
> configuration in a function which can be used by hosts for the
> implementation of the set_clock() callback.
>
> Signed-off-by: Ludovic Desroches <ludovic.desroches@xxxxxxxxx>
> ---
> drivers/mmc/host/sdhci.c | 33 ++++++++++++++++++++++-----------
> drivers/mmc/host/sdhci.h | 1 +
> 2 files changed, 23 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index 6bd3d17..2c3dede 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -1091,23 +1091,13 @@ static u16 sdhci_get_preset_value(struct sdhci_host *host)
> return preset;
> }
>
> -void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
> +u16 sdhci_compute_clock_config(struct sdhci_host *host, unsigned int clock)
The function name 'sdhci_compute_clock_config' seems a bit long. How about
just sdhci_calc_clk.
Also it needs to calculate 'actual_clock' too, so it needs to do that and
return the value.
> {
> int div = 0; /* Initialized for compiler warning */
> int real_div = div, clk_mul = 1;
> u16 clk = 0;
> - unsigned long timeout;
> bool switch_base_clk = false;
>
> - host->mmc->actual_clock = 0;
> -
> - sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
> - if (host->quirks2 & SDHCI_QUIRK2_NEED_DELAY_AFTER_INT_CLK_RST)
> - mdelay(1);
> -
> - if (clock == 0)
> - return;
> -
> if (host->version >= SDHCI_SPEC_300) {
> if (host->preset_enabled) {
> u16 pre_val;
> @@ -1188,6 +1178,27 @@ clock_set:
> clk |= (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT;
> clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN)
> << SDHCI_DIVIDER_HI_SHIFT;
> +
> + return clk;
> +}
> +EXPORT_SYMBOL_GPL(sdhci_compute_clock_config);
> +
> +void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
> +{
> + u16 clk;
> + unsigned long timeout;
> +
> + host->mmc->actual_clock = 0;
> +
> + sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
> + if (host->quirks2 & SDHCI_QUIRK2_NEED_DELAY_AFTER_INT_CLK_RST)
> + mdelay(1);
> +
> + if (clock == 0)
> + return;
> +
> + clk = sdhci_compute_clock_config(host, clock);
> +
> clk |= SDHCI_CLOCK_INT_EN;
> sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
>
> diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
> index 0f39f4f..23ddd6e 100644
> --- a/drivers/mmc/host/sdhci.h
> +++ b/drivers/mmc/host/sdhci.h
> @@ -661,6 +661,7 @@ static inline bool sdhci_sdio_irq_enabled(struct sdhci_host *host)
> return !!(host->flags & SDHCI_SDIO_IRQ_ENABLED);
> }
>
> +u16 sdhci_compute_clock_config(struct sdhci_host *host, unsigned int clock);
> void sdhci_set_clock(struct sdhci_host *host, unsigned int clock);
> void sdhci_set_power(struct sdhci_host *host, unsigned char mode,
> unsigned short vdd);
>
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