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authorLinus Torvalds <torvalds@linux-foundation.org>2015-02-11 10:56:48 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-11 10:56:48 -0800
commitaa7ed01f93ff7e149cad46f13f66b269d59c9bc0 (patch)
treeab46a44f3c83c75e1c81f211acd0d68ffe60dd7c /Documentation/devicetree/bindings
parent7796c11c728ad40ba4151d559a949c002deffb9a (diff)
parent017210d1c0dc2e2d3b142985cb31d90b98dc0f0f (diff)
Merge tag 'mmc-v3.20-1' of git://git.linaro.org/people/ulf.hansson/mmc
Pull MMC updates from Ulf Hansson: "MMC core: - Support for MMC power sequences. - SDIO function devicetree subnode parsing. - Refactor the hardware reset routines and enable it for SD cards. - Various code quality improvements, especially for slot-gpio. MMC host: - dw_mmc: Various fixes and cleanups. - dw_mmc: Convert to mmc_send_tuning(). - moxart: Fix probe logic. - sdhci: Various fixes and cleanups - sdhci: Asynchronous request handling support. - sdhci-pxav3: Various fixes and cleanups. - sdhci-tegra: Fixes for T114, T124 and T132. - rtsx: Various fixes and cleanups. - rtsx: Support for SDIO. - sdhi/tmio: Refactor and cleanup of header files. - omap_hsmmc: Use slot-gpio and common MMC DT parser. - Make all hosts to deal with errors from mmc_of_parse(). - sunxi: Various fixes and cleanups. - sdhci: Support for Fujitsu SDHCI controller f_sdh30" * tag 'mmc-v3.20-1' of git://git.linaro.org/people/ulf.hansson/mmc: (117 commits) mmc: sdhci-s3c: solve problem with sleeping in atomic context mmc: pwrseq: add driver for emmc hardware reset mmc: moxart: fix probe logic mmc: core: Invoke mmc_pwrseq_post_power_on() prior MMC_POWER_ON state mmc: pwrseq_simple: Add optional reference clock support mmc: pwrseq: Document optional clock for the simple power sequence mmc: pwrseq_simple: Extend to support more pins mmc: pwrseq: Document that simple sequence support more than one GPIO mmc: Add hardware dependencies for sdhci-pxav3 and sdhci-pxav2 mmc: sdhci-pxav3: Modify clock settings for the SDR50 and DDR50 modes mmc: sdhci-pxav3: Extend binding with SDIO3 conf reg for the Armada 38x mmc: sdhci-pxav3: Fix Armada 38x controller's caps according to erratum ERR-7878951 mmc: sdhci-pxav3: Fix SDR50 and DDR50 capabilities for the Armada 38x flavor mmc: sdhci: switch voltage before sdhci_set_ios in runtime resume mmc: tegra: Write xfer_mode, CMD regs in together mmc: Resolve BKOPS compatability issue mmc: sdhci-pxav3: fix setting of pdata->clk_delay_cycles mmc: dw_mmc: rockchip: remove incorrect __exit_p() mmc: dw_mmc: exynos: remove incorrect __exit_p() mmc: Fix menuconfig alignment of MMC_SDHCI_* options ...
Diffstat (limited to 'Documentation/devicetree/bindings')
-rw-r--r--Documentation/devicetree/bindings/mmc/mmc-pwrseq-emmc.txt25
-rw-r--r--Documentation/devicetree/bindings/mmc/mmc-pwrseq-simple.txt25
-rw-r--r--Documentation/devicetree/bindings/mmc/mmc.txt62
-rw-r--r--Documentation/devicetree/bindings/mmc/sdhci-fujitsu.txt30
-rw-r--r--Documentation/devicetree/bindings/mmc/sdhci-pxa.txt15
5 files changed, 152 insertions, 5 deletions
diff --git a/Documentation/devicetree/bindings/mmc/mmc-pwrseq-emmc.txt b/Documentation/devicetree/bindings/mmc/mmc-pwrseq-emmc.txt
new file mode 100644
index 000000000000..0cb827bf9435
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/mmc-pwrseq-emmc.txt
@@ -0,0 +1,25 @@
+* The simple eMMC hardware reset provider
+
+The purpose of this driver is to perform standard eMMC hw reset
+procedure, as descibed by Jedec 4.4 specification. This procedure is
+performed just after MMC core enabled power to the given mmc host (to
+fix possible issues if bootloader has left eMMC card in initialized or
+unknown state), and before performing complete system reboot (also in
+case of emergency reboot call). The latter is needed on boards, which
+doesn't have hardware reset logic connected to emmc card and (limited or
+broken) ROM bootloaders are unable to read second stage from the emmc
+card if the card is left in unknown or already initialized state.
+
+Required properties:
+- compatible : contains "mmc-pwrseq-emmc".
+- reset-gpios : contains a GPIO specifier. The reset GPIO is asserted
+ and then deasserted to perform eMMC card reset. To perform
+ reset procedure as described in Jedec 4.4 specification, the
+ gpio line should be defined as GPIO_ACTIVE_LOW.
+
+Example:
+
+ sdhci0_pwrseq {
+ compatible = "mmc-pwrseq-emmc";
+ reset-gpios = <&gpio1 12 GPIO_ACTIVE_LOW>;
+ }
diff --git a/Documentation/devicetree/bindings/mmc/mmc-pwrseq-simple.txt b/Documentation/devicetree/bindings/mmc/mmc-pwrseq-simple.txt
new file mode 100644
index 000000000000..a462c50f19a8
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/mmc-pwrseq-simple.txt
@@ -0,0 +1,25 @@
+* The simple MMC power sequence provider
+
+The purpose of the simple MMC power sequence provider is to supports a set of
+common properties between various SOC designs. It thus enables us to use the
+same provider for several SOC designs.
+
+Required properties:
+- compatible : contains "mmc-pwrseq-simple".
+
+Optional properties:
+- reset-gpios : contains a list of GPIO specifiers. The reset GPIOs are asserted
+ at initialization and prior we start the power up procedure of the card.
+ They will be de-asserted right after the power has been provided to the
+ card.
+- clocks : Must contain an entry for the entry in clock-names.
+ See ../clocks/clock-bindings.txt for details.
+- clock-names : Must include the following entry:
+ "ext_clock" (External clock provided to the card).
+
+Example:
+
+ sdhci0_pwrseq {
+ compatible = "mmc-pwrseq-simple";
+ reset-gpios = <&gpio1 12 0>;
+ }
diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt
index b52628b18a53..438899e8829b 100644
--- a/Documentation/devicetree/bindings/mmc/mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/mmc.txt
@@ -64,7 +64,43 @@ Optional SDIO properties:
- keep-power-in-suspend: Preserves card power during a suspend/resume cycle
- enable-sdio-wakeup: Enables wake up of host system on SDIO IRQ assertion
-Example:
+
+MMC power sequences:
+--------------------
+
+System on chip designs may specify a specific MMC power sequence. To
+successfully detect an (e)MMC/SD/SDIO card, that power sequence must be
+maintained while initializing the card.
+
+Optional property:
+- mmc-pwrseq: phandle to the MMC power sequence node. See "mmc-pwrseq-*"
+ for documentation of MMC power sequence bindings.
+
+
+Use of Function subnodes
+------------------------
+
+On embedded systems the cards connected to a host may need additional
+properties. These can be specified in subnodes to the host controller node.
+The subnodes are identified by the standard 'reg' property.
+Which information exactly can be specified depends on the bindings for the
+SDIO function driver for the subnode, as specified by the compatible string.
+
+Required host node properties when using function subnodes:
+- #address-cells: should be one. The cell is the slot id.
+- #size-cells: should be zero.
+
+Required function subnode properties:
+- compatible: name of SDIO function following generic names recommended practice
+- reg: Must contain the SDIO function number of the function this subnode
+ describes. A value of 0 denotes the memory SD function, values from
+ 1 to 7 denote the SDIO functions.
+
+
+Examples
+--------
+
+Basic example:
sdhci@ab000000 {
compatible = "sdhci";
@@ -77,4 +113,28 @@ sdhci@ab000000 {
max-frequency = <50000000>;
keep-power-in-suspend;
enable-sdio-wakeup;
+ mmc-pwrseq = <&sdhci0_pwrseq>
}
+
+Example with sdio function subnode:
+
+mmc3: mmc@01c12000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&mmc3_pins_a>;
+ vmmc-supply = <&reg_vmmc3>;
+ bus-width = <4>;
+ non-removable;
+ mmc-pwrseq = <&sdhci0_pwrseq>
+ status = "okay";
+
+ brcmf: bcrmf@1 {
+ reg = <1>;
+ compatible = "brcm,bcm43xx-fmac";
+ interrupt-parent = <&pio>;
+ interrupts = <10 8>; /* PH10 / EINT10 */
+ interrupt-names = "host-wake";
+ };
+};
diff --git a/Documentation/devicetree/bindings/mmc/sdhci-fujitsu.txt b/Documentation/devicetree/bindings/mmc/sdhci-fujitsu.txt
new file mode 100644
index 000000000000..de2c53cff4f1
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/sdhci-fujitsu.txt
@@ -0,0 +1,30 @@
+* Fujitsu SDHCI controller
+
+This file documents differences between the core properties in mmc.txt
+and the properties used by the sdhci_f_sdh30 driver.
+
+Required properties:
+- compatible: "fujitsu,mb86s70-sdhci-3.0"
+- clocks: Must contain an entry for each entry in clock-names. It is a
+ list of phandles and clock-specifier pairs.
+ See ../clocks/clock-bindings.txt for details.
+- clock-names: Should contain the following two entries:
+ "iface" - clock used for sdhci interface
+ "core" - core clock for sdhci controller
+
+Optional properties:
+- vqmmc-supply: phandle to the regulator device tree node, mentioned
+ as the VCCQ/VDD_IO supply in the eMMC/SD specs.
+
+Example:
+
+ sdhci1: mmc@36600000 {
+ compatible = "fujitsu,mb86s70-sdhci-3.0";
+ reg = <0 0x36600000 0x1000>;
+ interrupts = <0 172 0x4>,
+ <0 173 0x4>;
+ bus-width = <4>;
+ vqmmc-supply = <&vccq_sdhci1>;
+ clocks = <&clock 2 2 0>, <&clock 2 3 0>;
+ clock-names = "iface", "core";
+ };
diff --git a/Documentation/devicetree/bindings/mmc/sdhci-pxa.txt b/Documentation/devicetree/bindings/mmc/sdhci-pxa.txt
index 4dd6deb90719..3d1b449d6097 100644
--- a/Documentation/devicetree/bindings/mmc/sdhci-pxa.txt
+++ b/Documentation/devicetree/bindings/mmc/sdhci-pxa.txt
@@ -9,9 +9,13 @@ Required properties:
- reg:
* for "mrvl,pxav2-mmc" and "mrvl,pxav3-mmc", one register area for
the SDHCI registers.
- * for "marvell,armada-380-sdhci", two register areas. The first one
- for the SDHCI registers themselves, and the second one for the
- AXI/Mbus bridge registers of the SDHCI unit.
+
+ * for "marvell,armada-380-sdhci", three register areas. The first
+ one for the SDHCI registers themselves, the second one for the
+ AXI/Mbus bridge registers of the SDHCI unit, the third one for the
+ SDIO3 Configuration register
+- reg names: should be "sdhci", "mbus", "conf-sdio3". only mandatory
+ for "marvell,armada-380-sdhci"
- clocks: Array of clocks required for SDHCI; requires at least one for
I/O clock.
- clock-names: Array of names corresponding to clocks property; shall be
@@ -35,7 +39,10 @@ sdhci@d4280800 {
sdhci@d8000 {
compatible = "marvell,armada-380-sdhci";
- reg = <0xd8000 0x1000>, <0xdc000 0x100>;
+ reg-names = "sdhci", "mbus", "conf-sdio3";
+ reg = <0xd8000 0x1000>,
+ <0xdc000 0x100>;
+ <0x18454 0x4>;
interrupts = <0 25 0x4>;
clocks = <&gateclk 17>;
clock-names = "io";