The ST Micro variant supports the option of using a feedback clock signal in favor of the clockout pin when latching incoming signals on the data bus.
Since this is matter of how pins are being routed we need to provide a new DT binding to be able to configure this through DT. Signed-off-by: Ulf Hansson <[email protected]> --- Documentation/devicetree/bindings/mmc/mmci.txt | 2 ++ drivers/mmc/host/mmci.c | 2 ++ 2 files changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/mmc/mmci.txt b/Documentation/devicetree/bindings/mmc/mmci.txt index 9bd2ffa..2c8756f 100644 --- a/Documentation/devicetree/bindings/mmc/mmci.txt +++ b/Documentation/devicetree/bindings/mmc/mmci.txt @@ -24,6 +24,7 @@ Optional properties: - st,sig-dir-dat31 : bus signal direction pin used for DAT[3] and DAT[1]. - st,sig-dir-dat74 : bus signal direction pin used for DAT[4] to DAT[7]. - st,sig-dir-cmd : cmd signal direction pin used for CMD. +- st,sig-pin-fbclk : feedback clock signal pin used. Example: @@ -47,6 +48,7 @@ sdi0_per1@80126000 { st,sig-dir-dat0; st,sig-dir-dat2; st,sig-dir-cmd; + st,sig-pin-fbclk; vmmc-supply = <&ab8500_ldo_aux3_reg>; vqmmc-supply = <&vmmci>; diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index c99ec88..3663bc15 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -1402,6 +1402,8 @@ static void mmci_dt_populate_generic_pdata(struct device_node *np, pdata->sigdir |= MCI_ST_DATA74DIREN; if (of_get_property(np, "st,sig-dir-cmd", NULL)) pdata->sigdir |= MCI_ST_CMDDIREN; + if (of_get_property(np, "st,sig-pin-fbclk", NULL)) + pdata->sigdir |= MCI_ST_FBCLKEN; pdata->gpio_wp = of_get_named_gpio(np, "wp-gpios", 0); pdata->gpio_cd = of_get_named_gpio(np, "cd-gpios", 0); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
