diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-driver-st | 12 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/ufs/ufs-qcom.txt | 58 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt | 11 | ||||
| -rw-r--r-- | Documentation/scsi/st.txt | 4 |
4 files changed, 83 insertions, 2 deletions
diff --git a/Documentation/ABI/testing/sysfs-driver-st b/Documentation/ABI/testing/sysfs-driver-st new file mode 100644 index 000000000000..ba5d77008a85 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-driver-st @@ -0,0 +1,12 @@ +What: /sys/bus/scsi/drivers/st/debug_flag +Date: October 2015 +Kernel Version: ?.? +Contact: shane.seymour@hpe.com +Description: + This file allows you to turn debug output from the st driver + off if you write a '0' to the file or on if you write a '1'. + Note that debug output requires that the module be compiled + with the #define DEBUG set to a non-zero value (this is the + default). If DEBUG is set to 0 then this file will not + appear in sysfs as its presence is conditional upon debug + output support being compiled into the module. diff --git a/Documentation/devicetree/bindings/ufs/ufs-qcom.txt b/Documentation/devicetree/bindings/ufs/ufs-qcom.txt new file mode 100644 index 000000000000..070baf4d7d97 --- /dev/null +++ b/Documentation/devicetree/bindings/ufs/ufs-qcom.txt @@ -0,0 +1,58 @@ +* Qualcomm Technologies Inc Universal Flash Storage (UFS) PHY + +UFSPHY nodes are defined to describe on-chip UFS PHY hardware macro. +Each UFS PHY node should have its own node. + +To bind UFS PHY with UFS host controller, the controller node should +contain a phandle reference to UFS PHY node. + +Required properties: +- compatible : compatible list, contains "qcom,ufs-phy-qmp-20nm" + or "qcom,ufs-phy-qmp-14nm" according to the relevant phy in use. +- reg : should contain PHY register address space (mandatory), +- reg-names : indicates various resources passed to driver (via reg proptery) by name. + Required "reg-names" is "phy_mem". +- #phy-cells : This property shall be set to 0 +- vdda-phy-supply : phandle to main PHY supply for analog domain +- vdda-pll-supply : phandle to PHY PLL and Power-Gen block power supply +- clocks : List of phandle and clock specifier pairs +- clock-names : List of clock input name strings sorted in the same + order as the clocks property. "ref_clk_src", "ref_clk", + "tx_iface_clk" & "rx_iface_clk" are mandatory but + "ref_clk_parent" is optional + +Optional properties: +- vdda-phy-max-microamp : specifies max. load that can be drawn from phy supply +- vdda-pll-max-microamp : specifies max. load that can be drawn from pll supply +- vddp-ref-clk-supply : phandle to UFS device ref_clk pad power supply +- vddp-ref-clk-max-microamp : specifies max. load that can be drawn from this supply +- vddp-ref-clk-always-on : specifies if this supply needs to be kept always on + +Example: + + ufsphy1: ufsphy@0xfc597000 { + compatible = "qcom,ufs-phy-qmp-20nm"; + reg = <0xfc597000 0x800>; + reg-names = "phy_mem"; + #phy-cells = <0>; + vdda-phy-supply = <&pma8084_l4>; + vdda-pll-supply = <&pma8084_l12>; + vdda-phy-max-microamp = <50000>; + vdda-pll-max-microamp = <1000>; + clock-names = "ref_clk_src", + "ref_clk_parent", + "ref_clk", + "tx_iface_clk", + "rx_iface_clk"; + clocks = <&clock_rpm clk_ln_bb_clk>, + <&clock_gcc clk_pcie_1_phy_ldo >, + <&clock_gcc clk_ufs_phy_ldo>, + <&clock_gcc clk_gcc_ufs_tx_cfg_clk>, + <&clock_gcc clk_gcc_ufs_rx_cfg_clk>; + }; + + ufshc@0xfc598000 { + ... + phys = <&ufsphy1>; + phy-names = "ufsphy"; + }; diff --git a/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt b/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt index 53579197eca2..03c0e989e020 100644 --- a/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt +++ b/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt @@ -4,11 +4,18 @@ UFSHC nodes are defined to describe on-chip UFS host controllers. Each UFS controller instance should have its own node. Required properties: -- compatible : compatible list, contains "jedec,ufs-1.1" +- compatible : must contain "jedec,ufs-1.1", may also list one or more + of the following: + "qcom,msm8994-ufshc" + "qcom,msm8996-ufshc" + "qcom,ufshc" - interrupts : <interrupt mapping for UFS host controller IRQ> - reg : <registers mapping> Optional properties: +- phys : phandle to UFS PHY node +- phy-names : the string "ufsphy" when is found in a node, along + with "phys" attribute, provides phandle to UFS PHY node - vdd-hba-supply : phandle to UFS host controller supply regulator node - vcc-supply : phandle to VCC supply regulator node - vccq-supply : phandle to VCCQ supply regulator node @@ -54,4 +61,6 @@ Example: clocks = <&core 0>, <&ref 0>, <&iface 0>; clock-names = "core_clk", "ref_clk", "iface_clk"; freq-table-hz = <100000000 200000000>, <0 0>, <0 0>; + phys = <&ufsphy1>; + phy-names = "ufsphy"; }; diff --git a/Documentation/scsi/st.txt b/Documentation/scsi/st.txt index f29fa550665a..b3211af63b79 100644 --- a/Documentation/scsi/st.txt +++ b/Documentation/scsi/st.txt @@ -569,7 +569,9 @@ Debugging code is now compiled in by default but debugging is turned off with the kernel module parameter debug_flag defaulting to 0. Debugging can still be switched on and off with an ioctl. To enable debug at module load time add debug_flag=1 to the module load options, the -debugging output is not voluminous. +debugging output is not voluminous. Debugging can also be enabled +and disabled by writing a '0' (disable) or '1' (enable) to the sysfs +file /sys/bus/scsi/drivers/st/debug_flag. If the tape seems to hang, I would be very interested to hear where the driver is waiting. With the command 'ps -l' you can see the state |