From 870556a3dfb16d004f8e09dd59a1eddc727fcf0c Mon Sep 17 00:00:00 2001 From: Doug Anderson Date: Fri, 7 Jun 2013 10:28:29 -0700 Subject: mmc: dw_mmc: Handle late vmmc regulators with EPROBE_DEFER It is possible to specify a regulator that should be turned on when dw_mmc is probed. At the moment dw_mmc will fail to use the regulator properly if the regulator probes after dw_mmc. Fix this problem by honoring EPROBE_DEFER. At the same time move the regulator code out of the slot init code. We only specify one regulator for the whole device and other parts of the code (like suspend/resume) assume that the regulator has only been enabled once. Signed-off-by: Doug Anderson Signed-off-by: Chris Ball --- Documentation/devicetree/bindings/mmc/synopsis-dw-mshc.txt | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'Documentation/devicetree/bindings/mmc') diff --git a/Documentation/devicetree/bindings/mmc/synopsis-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/synopsis-dw-mshc.txt index 726fd2122a13..d5cc94ecd60e 100644 --- a/Documentation/devicetree/bindings/mmc/synopsis-dw-mshc.txt +++ b/Documentation/devicetree/bindings/mmc/synopsis-dw-mshc.txt @@ -55,6 +55,9 @@ Optional properties: * broken-cd: as documented in mmc core bindings. +* vmmc-supply: The phandle to the regulator to use for vmmc. If this is + specified we'll defer probe until we can find this regulator. + Aliases: - All the MSHC controller nodes should be represented in the aliases node using @@ -79,6 +82,7 @@ board specific portions as listed below. broken-cd; fifo-depth = <0x80>; card-detect-delay = <200>; + vmmc-supply = <&buck8>; slot@0 { reg = <0>; -- cgit v1.2.3 From 3c6d89ea34605df0f4fe6e6dac5abcb781f82f53 Mon Sep 17 00:00:00 2001 From: Doug Anderson Date: Fri, 7 Jun 2013 10:28:30 -0700 Subject: mmc: dw_mmc: Add the ability to set the ciu clock frequency As of now we rely on code outside of the driver to set the ciu clock frequency. There's no reason to do that. Add support for setting up the clock in the driver during probe. Signed-off-by: Doug Anderson Acked-by: Jaehoon Chung Signed-off-by: Chris Ball --- .../devicetree/bindings/mmc/synopsis-dw-mshc.txt | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'Documentation/devicetree/bindings/mmc') diff --git a/Documentation/devicetree/bindings/mmc/synopsis-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/synopsis-dw-mshc.txt index d5cc94ecd60e..dd31b00f0866 100644 --- a/Documentation/devicetree/bindings/mmc/synopsis-dw-mshc.txt +++ b/Documentation/devicetree/bindings/mmc/synopsis-dw-mshc.txt @@ -39,6 +39,19 @@ Required Properties: Optional properties: +* clocks: from common clock binding: handle to biu and ciu clocks for the + bus interface unit clock and the card interface unit clock. + +* clock-names: from common clock binding: Shall be "biu" and "ciu". + If the biu clock is missing we'll simply skip enabling it. If the + ciu clock is missing we'll just assume that the clock is running at + clock-frequency. It is an error to omit both the ciu clock and the + clock-frequency. + +* clock-frequency: should be the frequency (in Hz) of the ciu clock. If this + is specified and the ciu clock is specified then we'll try to set the ciu + clock to this at probe time. + * num-slots: specifies the number of slots supported by the controller. The number of physical slots actually used could be equal or less than the value specified by num-slots. If this property is not specified, the value @@ -70,6 +83,8 @@ board specific portions as listed below. dwmmc0@12200000 { compatible = "snps,dw-mshc"; + clocks = <&clock 351>, <&clock 132>; + clock-names = "biu", "ciu"; reg = <0x12200000 0x1000>; interrupts = <0 75 0>; #address-cells = <1>; @@ -77,6 +92,7 @@ board specific portions as listed below. }; dwmmc0@12200000 { + clock-frequency = <400000000>; num-slots = <1>; supports-highspeed; broken-cd; -- cgit v1.2.3 From 5a36d6bcdf23e408da1d0cbb5d5ad2a26089e9ca Mon Sep 17 00:00:00 2001 From: Ulf Hansson Date: Mon, 10 Jun 2013 17:03:47 +0200 Subject: mmc: core: Add DT-bindings for MMC_CAP2_FULL_PWR_CYCLE The DT-binding for MMC_CAP2_FULL_PWR_CYCLE, is used to indicate whether it is possible to perform a full power cycle of the card. Signed-off-by: Ulf Hansson Signed-off-by: Chris Ball --- Documentation/devicetree/bindings/mmc/mmc.txt | 1 + 1 file changed, 1 insertion(+) (limited to 'Documentation/devicetree/bindings/mmc') diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt index 85aada2263d5..458b57f199af 100644 --- a/Documentation/devicetree/bindings/mmc/mmc.txt +++ b/Documentation/devicetree/bindings/mmc/mmc.txt @@ -28,6 +28,7 @@ Optional properties: - cap-mmc-highspeed: MMC high-speed timing is supported - cap-power-off-card: powering off the card is safe - cap-sdio-irq: enable SDIO IRQ signalling on this interface +- full-pwr-cycle: full power cycle of the card is supported *NOTE* on CD and WP polarity. To use common for all SD/MMC host controllers line polarity properties, we have to fix the meaning of the "normal" and "inverted" -- cgit v1.2.3 From c73e41c898bb59aaf50098c2c672c7132a88fdbc Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Heiko=20St=C3=BCbner?= Date: Thu, 27 Jun 2013 11:55:35 -0400 Subject: mmc: dw_mmc-pltfm: add Rockchip variant Cortex-A9 SoCs from Rockchip use a slightly modified variant of dw_mmc controllers that seems to require the SDMMC_CMD_USE_HOLD_REG bit to always be set. There also seem to be no other modifications (additional register etc) present, so to keep the footprint low, add this small variant to the pltfm driver. Signed-off-by: Heiko Stuebner Acked-by: Seungwon Jeon Signed-off-by: Chris Ball --- .../devicetree/bindings/mmc/rockchip-dw-mshc.txt | 23 ++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt (limited to 'Documentation/devicetree/bindings/mmc') diff --git a/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt new file mode 100644 index 000000000000..8a3d91d47b6a --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt @@ -0,0 +1,23 @@ +* Rockchip specific extensions to the Synopsis Designware Mobile + Storage Host Controller + +The Synopsis designware mobile storage host controller is used to interface +a SoC with storage medium such as eMMC or SD/MMC cards. This file documents +differences between the core Synopsis dw mshc controller properties described +by synopsis-dw-mshc.txt and the properties used by the Rockchip specific +extensions to the Synopsis Designware Mobile Storage Host Controller. + +Required Properties: + +* compatible: should be + - "rockchip,rk2928-dw-mshc": for Rockchip RK2928 and following + +Example: + + rkdwmmc0@12200000 { + compatible = "rockchip,rk2928-dw-mshc"; + reg = <0x12200000 0x1000>; + interrupts = <0 75 0>; + #address-cells = <1>; + #size-cells = <0>; + }; -- cgit v1.2.3