On Fri, Jan 25, 2013 at 04:17:41PM +0100, Jean-Christophe PLAGNIOL-VILLARD wrote:
> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@xxxxxxxxxxxx>
> ---
> drivers/mci/atmel_mci.c | 10 +++++++++-
> 1 file changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mci/atmel_mci.c b/drivers/mci/atmel_mci.c
> index d5fdd1d..bf0adb0 100644
> --- a/drivers/mci/atmel_mci.c
> +++ b/drivers/mci/atmel_mci.c
> @@ -28,6 +28,7 @@
> #include "atmel-mci-regs.h"
>
> struct atmel_mci_caps {
> + bool has_rwproof;
> bool has_odd_clk_div;
> };
>
> @@ -94,7 +95,13 @@ static void atmci_set_clk_rate(struct atmel_mci *host,
> dev_dbg(host->hw_dev, "atmel_set_clk_rate: clkIn=%ld clkIos=%d divider=%d\n",
> host->bus_hz, clock_min, clkdiv);
>
> - host->mode_reg |= ATMCI_MR_RDPROOF | ATMCI_MR_WRPROOF;
> + /*
> + * WRPROOF and RDPROOF prevent overruns/underruns by
> + * stopping the clock when the FIFO is full/empty.
> + * This state is not expected to last for long.
> + */
> + if (host->caps.has_rwproof)
> + host->mode_reg |= ATMCI_MR_RDPROOF | ATMCI_MR_WRPROOF;
>
> atmci_writel(host, ATMCI_MR, host->mode_reg);
> }
> @@ -470,6 +477,7 @@ static void atmci_get_cap(struct atmel_mci *host)
> case 0x400:
> case 0x300:
> case 0x200:
> + host->caps.has_rwproof = 1;
> case 0x100:
> case 0x0:
By 'since' in the subject do you mean 'up to'?
Sascha
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