Merge tag 'pinctrl-mergebase-20120418' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl into next/pinctrl

By Stephen Warren (12) and others
via Linus Walleij
* tag 'pinctrl-mergebase-20120418' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (24 commits)
  pinctrl: show pin name for pingroups in sysfs
  pinctrl: show pin name when request pins
  pinctrl: implement devm_pinctrl_get()/put()
  pinctrl: a minor fix of pin config debug information
  pinctrl: pinconf: fix compilation error if PINCONF is not selected
  pinctrl: allow pctldevs to decode pin config in debugfs
  pinctrl: ifdef CONFIG_DEBUG_FS cleanup
  pinctrl: mark non-EXPERIMENTAL
  pinctrl: tegra: Add complete device tree support
  dt: Document Tegra20/30 pinctrl binding
  dt: Move Tegra20 pin mux binding into new pinctrl directory
  dt: pinctrl: Document device tree binding
  dt: add property iteration helpers
  pinctrl: implement pinctrl deferred probing
  pinctrl: add some error checking for user interfaces
  pinctrl: fix pinmux_check_ops error checking
  pinctrl: replace list_*() with get_*_count()
  pinctrl: mark const init data with __initconst instead of __initdata
  Documentation: pinctrl: add missing spi0_0 grp in example
  pinctrl: fix build when CONFIG_OF && !CONFIG_PINCTRL
  ...

Resolved conflicts in drivers/pinctrl/core.c due to same patch being
applied in two branches.

Signed-off-by: Olof Johansson <olof@lixom.net>

6 files changed, 447 insertions, 48 deletions

diff --git a/Documentation/devicetree/bindings/pinctrl/nvidia,tegra20-pinmux.txt b/Documentation/devicetree/bindings/pinctrl/nvidia,tegra20-pinmux.txt
new file mode 100644
index 00000000000..c8e578263ce
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/nvidia,tegra20-pinmux.txt
@@ -0,0 +1,132 @@
+NVIDIA Tegra20 pinmux controller
+
+Required properties:
+- compatible: "nvidia,tegra20-pinmux"
+- reg: Should contain the register physical address and length for each of
+  the tri-state, mux, pull-up/down, and pad control register sets.
+
+Please refer to pinctrl-bindings.txt in this directory for details of the
+common pinctrl bindings used by client devices, including the meaning of the
+phrase "pin configuration node".
+
+Tegra's pin configuration nodes act as a container for an abitrary number of
+subnodes. Each of these subnodes represents some desired configuration for a
+pin, a group, or a list of pins or groups. This configuration can include the
+mux function to select on those pin(s)/group(s), and various pin configuration
+parameters, such as pull-up, tristate, drive strength, etc.
+
+The name of each subnode is not important; all subnodes should be enumerated
+and processed purely based on their content.
+
+Each subnode only affects those parameters that are explicitly listed. In
+other words, a subnode that lists a mux function but no pin configuration
+parameters implies no information about any pin configuration parameters.
+Similarly, a pin subnode that describes a pullup parameter implies no
+information about e.g. the mux function or tristate parameter. For this
+reason, even seemingly boolean values are actually tristates in this binding:
+unspecified, off, or on. Unspecified is represented as an absent property,
+and off/on are represented as integer values 0 and 1.
+
+Required subnode-properties:
+- nvidia,pins : An array of strings. Each string contains the name of a pin or
+    group. Valid values for these names are listed below.
+
+Optional subnode-properties:
+- nvidia,function: A string containing the name of the function to mux to the
+  pin or group. Valid values for function names are listed below. See the Tegra
+  TRM to determine which are valid for each pin or group.
+- nvidia,pull: Integer, representing the pull-down/up to apply to the pin.
+    0: none, 1: down, 2: up.
+- nvidia,tristate: Integer.
+    0: drive, 1: tristate.
+- nvidia,high-speed-mode: Integer. Enable high speed mode the pins.
+    0: no, 1: yes.
+- nvidia,schmitt: Integer. Enables Schmitt Trigger on the input.
+    0: no, 1: yes.
+- nvidia,low-power-mode: Integer. Valid values 0-3. 0 is least power, 3 is
+    most power. Controls the drive power or current. See "Low Power Mode"
+    or "LPMD1" and "LPMD0" in the Tegra TRM.
+- nvidia,pull-down-strength: Integer. Controls drive strength. 0 is weakest.
+    The range of valid values depends on the pingroup. See "CAL_DRVDN" in the
+    Tegra TRM.
+- nvidia,pull-up-strength: Integer. Controls drive strength. 0 is weakest.
+    The range of valid values depends on the pingroup. See "CAL_DRVUP" in the
+    Tegra TRM.
+- nvidia,slew-rate-rising: Integer. Controls rising signal slew rate. 0 is
+    fastest. The range of valid values depends on the pingroup. See
+    "DRVDN_SLWR" in the Tegra TRM.
+- nvidia,slew-rate-falling: Integer. Controls falling signal slew rate. 0 is
+    fastest. The range of valid values depends on the pingroup. See
+    "DRVUP_SLWF" in the Tegra TRM.
+
+Note that many of these properties are only valid for certain specific pins
+or groups. See the Tegra TRM and various pinmux spreadsheets for complete
+details regarding which groups support which functionality. The Linux pinctrl
+driver may also be a useful reference, since it consolidates, disambiguates,
+and corrects data from all those sources.
+
+Valid values for pin and group names are:
+
+  mux groups:
+
+    These all support nvidia,function, nvidia,tristate, and many support
+    nvidia,pull.
+
+    ata, atb, atc, atd, ate, cdev1, cdev2, crtp, csus, dap1, dap2, dap3, dap4,
+    ddc, dta, dtb, dtc, dtd, dte, dtf, gma, gmb, gmc, gmd, gme, gpu, gpu7,
+    gpv, hdint, i2cp, irrx, irtx, kbca, kbcb, kbcc, kbcd, kbce, kbcf, lcsn,
+    ld0, ld1, ld2, ld3, ld4, ld5, ld6, ld7, ld8, ld9, ld10, ld11, ld12, ld13,
+    ld14, ld15, ld16, ld17, ldc, ldi, lhp0, lhp1, lhp2, lhs, lm0, lm1, lpp,
+    lpw0, lpw1, lpw2, lsc0, lsc1, lsck, lsda, lsdi, lspi, lvp0, lvp1, lvs,
+    owc, pmc, pta, rm, sdb, sdc, sdd, sdio1, slxa, slxc, slxd, slxk, spdi,
+    spdo, spia, spib, spic, spid, spie, spif, spig, spih, uaa, uab, uac, uad,
+    uca, ucb, uda.
+
+  tristate groups:
+
+    These only support nvidia,pull.
+
+    ck32, ddrc, pmca, pmcb, pmcc, pmcd, pmce, xm2c, xm2d, ls, lc, ld17_0,
+    ld19_18, ld21_20, ld23_22.
+
+  drive groups:
+
+    With some exceptions, these support nvidia,high-speed-mode,
+    nvidia,schmitt, nvidia,low-power-mode, nvidia,pull-down-strength,
+    nvidia,pull-up-strength, nvidia,slew_rate-rising, nvidia,slew_rate-falling.
+
+    drive_ao1, drive_ao2, drive_at1, drive_at2, drive_cdev1, drive_cdev2,
+    drive_csus, drive_dap1, drive_dap2, drive_dap3, drive_dap4, drive_dbg,
+    drive_lcd1, drive_lcd2, drive_sdmmc2, drive_sdmmc3, drive_spi, drive_uaa,
+    drive_uab, drive_uart2, drive_uart3, drive_vi1, drive_vi2, drive_xm2a,
+    drive_xm2c, drive_xm2d, drive_xm2clk, drive_sdio1, drive_crt, drive_ddc,
+    drive_gma, drive_gmb, drive_gmc, drive_gmd, drive_gme, drive_owr,
+    drive_uda.
+
+Example:
+
+	pinctrl@70000000 {
+		compatible = "nvidia,tegra20-pinmux";
+		reg = < 0x70000014 0x10    /* Tri-state registers */
+			0x70000080 0x20    /* Mux registers */
+			0x700000a0 0x14    /* Pull-up/down registers */
+			0x70000868 0xa8 >; /* Pad control registers */
+	};
+
+Example board file extract:
+
+	pinctrl@70000000 {
+		sdio4_default: sdio4_default {
+			atb {
+				nvidia,pins = "atb", "gma", "gme";
+				nvidia,function = "sdio4";
+				nvidia,pull = <0>;
+				nvidia,tristate = <0>;
+			};
+		};
+	};
+
+	sdhci@c8000600 {
+		pinctrl-names = "default";
+		pinctrl-0 = <&sdio4_default>;
+	};
diff --git a/Documentation/devicetree/bindings/pinctrl/nvidia,tegra30-pinmux.txt b/Documentation/devicetree/bindings/pinctrl/nvidia,tegra30-pinmux.txt
new file mode 100644
index 00000000000..c275b70349c
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/nvidia,tegra30-pinmux.txt
@@ -0,0 +1,132 @@
+NVIDIA Tegra30 pinmux controller
+
+The Tegra30 pinctrl binding is very similar to the Tegra20 pinctrl binding,
+as described in nvidia,tegra20-pinmux.txt. In fact, this document assumes
+that binding as a baseline, and only documents the differences between the
+two bindings.
+
+Required properties:
+- compatible: "nvidia,tegra30-pinmux"
+- reg: Should contain the register physical address and length for each of
+  the pad control and mux registers.
+
+Tegra30 adds the following optional properties for pin configuration subnodes:
+- nvidia,enable-input: Integer. Enable the pin's input path. 0: no, 1: yes.
+- nvidia,open-drain: Integer. Enable open drain mode. 0: no, 1: yes.
+- nvidia,lock: Integer. Lock the pin configuration against further changes
+    until reset. 0: no, 1: yes.
+- nvidia,io-reset: Integer. Reset the IO path. 0: no, 1: yes.
+
+As with Tegra20, see the Tegra TRM for complete details regarding which groups
+support which functionality.
+
+Valid values for pin and group names are:
+
+  per-pin mux groups:
+
+    These all support nvidia,function, nvidia,tristate, nvidia,pull,
+    nvidia,enable-input, nvidia,lock. Some support nvidia,open-drain,
+    nvidia,io-reset.
+
+    clk_32k_out_pa0, uart3_cts_n_pa1, dap2_fs_pa2, dap2_sclk_pa3,
+    dap2_din_pa4, dap2_dout_pa5, sdmmc3_clk_pa6, sdmmc3_cmd_pa7, gmi_a17_pb0,
+    gmi_a18_pb1, lcd_pwr0_pb2, lcd_pclk_pb3, sdmmc3_dat3_pb4, sdmmc3_dat2_pb5,
+    sdmmc3_dat1_pb6, sdmmc3_dat0_pb7, uart3_rts_n_pc0, lcd_pwr1_pc1,
+    uart2_txd_pc2, uart2_rxd_pc3, gen1_i2c_scl_pc4, gen1_i2c_sda_pc5,
+    lcd_pwr2_pc6, gmi_wp_n_pc7, sdmmc3_dat5_pd0, sdmmc3_dat4_pd1, lcd_dc1_pd2,
+    sdmmc3_dat6_pd3, sdmmc3_dat7_pd4, vi_d1_pd5, vi_vsync_pd6, vi_hsync_pd7,
+    lcd_d0_pe0, lcd_d1_pe1, lcd_d2_pe2, lcd_d3_pe3, lcd_d4_pe4, lcd_d5_pe5,
+    lcd_d6_pe6, lcd_d7_pe7, lcd_d8_pf0, lcd_d9_pf1, lcd_d10_pf2, lcd_d11_pf3,
+    lcd_d12_pf4, lcd_d13_pf5, lcd_d14_pf6, lcd_d15_pf7, gmi_ad0_pg0,
+    gmi_ad1_pg1, gmi_ad2_pg2, gmi_ad3_pg3, gmi_ad4_pg4, gmi_ad5_pg5,
+    gmi_ad6_pg6, gmi_ad7_pg7, gmi_ad8_ph0, gmi_ad9_ph1, gmi_ad10_ph2,
+    gmi_ad11_ph3, gmi_ad12_ph4, gmi_ad13_ph5, gmi_ad14_ph6, gmi_ad15_ph7,
+    gmi_wr_n_pi0, gmi_oe_n_pi1, gmi_dqs_pi2, gmi_cs6_n_pi3, gmi_rst_n_pi4,
+    gmi_iordy_pi5, gmi_cs7_n_pi6, gmi_wait_pi7, gmi_cs0_n_pj0, lcd_de_pj1,
+    gmi_cs1_n_pj2, lcd_hsync_pj3, lcd_vsync_pj4, uart2_cts_n_pj5,
+    uart2_rts_n_pj6, gmi_a16_pj7, gmi_adv_n_pk0, gmi_clk_pk1, gmi_cs4_n_pk2,
+    gmi_cs2_n_pk3, gmi_cs3_n_pk4, spdif_out_pk5, spdif_in_pk6, gmi_a19_pk7,
+    vi_d2_pl0, vi_d3_pl1, vi_d4_pl2, vi_d5_pl3, vi_d6_pl4, vi_d7_pl5,
+    vi_d8_pl6, vi_d9_pl7, lcd_d16_pm0, lcd_d17_pm1, lcd_d18_pm2, lcd_d19_pm3,
+    lcd_d20_pm4, lcd_d21_pm5, lcd_d22_pm6, lcd_d23_pm7, dap1_fs_pn0,
+    dap1_din_pn1, dap1_dout_pn2, dap1_sclk_pn3, lcd_cs0_n_pn4, lcd_sdout_pn5,
+    lcd_dc0_pn6, hdmi_int_pn7, ulpi_data7_po0, ulpi_data0_po1, ulpi_data1_po2,
+    ulpi_data2_po3, ulpi_data3_po4, ulpi_data4_po5, ulpi_data5_po6,
+    ulpi_data6_po7, dap3_fs_pp0, dap3_din_pp1, dap3_dout_pp2, dap3_sclk_pp3,
+    dap4_fs_pp4, dap4_din_pp5, dap4_dout_pp6, dap4_sclk_pp7, kb_col0_pq0,
+    kb_col1_pq1, kb_col2_pq2, kb_col3_pq3, kb_col4_pq4, kb_col5_pq5,
+    kb_col6_pq6, kb_col7_pq7, kb_row0_pr0, kb_row1_pr1, kb_row2_pr2,
+    kb_row3_pr3, kb_row4_pr4, kb_row5_pr5, kb_row6_pr6, kb_row7_pr7,
+    kb_row8_ps0, kb_row9_ps1, kb_row10_ps2, kb_row11_ps3, kb_row12_ps4,
+    kb_row13_ps5, kb_row14_ps6, kb_row15_ps7, vi_pclk_pt0, vi_mclk_pt1,
+    vi_d10_pt2, vi_d11_pt3, vi_d0_pt4, gen2_i2c_scl_pt5, gen2_i2c_sda_pt6,
+    sdmmc4_cmd_pt7, pu0, pu1, pu2, pu3, pu4, pu5, pu6, jtag_rtck_pu7, pv0,
+    pv1, pv2, pv3, ddc_scl_pv4, ddc_sda_pv5, crt_hsync_pv6, crt_vsync_pv7,
+    lcd_cs1_n_pw0, lcd_m1_pw1, spi2_cs1_n_pw2, spi2_cs2_n_pw3, clk1_out_pw4,
+    clk2_out_pw5, uart3_txd_pw6, uart3_rxd_pw7, spi2_mosi_px0, spi2_miso_px1,
+    spi2_sck_px2, spi2_cs0_n_px3, spi1_mosi_px4, spi1_sck_px5, spi1_cs0_n_px6,
+    spi1_miso_px7, ulpi_clk_py0, ulpi_dir_py1, ulpi_nxt_py2, ulpi_stp_py3,
+    sdmmc1_dat3_py4, sdmmc1_dat2_py5, sdmmc1_dat1_py6, sdmmc1_dat0_py7,
+    sdmmc1_clk_pz0, sdmmc1_cmd_pz1, lcd_sdin_pz2, lcd_wr_n_pz3, lcd_sck_pz4,
+    sys_clk_req_pz5, pwr_i2c_scl_pz6, pwr_i2c_sda_pz7, sdmmc4_dat0_paa0,
+    sdmmc4_dat1_paa1, sdmmc4_dat2_paa2, sdmmc4_dat3_paa3, sdmmc4_dat4_paa4,
+    sdmmc4_dat5_paa5, sdmmc4_dat6_paa6, sdmmc4_dat7_paa7, pbb0,
+    cam_i2c_scl_pbb1, cam_i2c_sda_pbb2, pbb3, pbb4, pbb5, pbb6, pbb7,
+    cam_mclk_pcc0, pcc1, pcc2, sdmmc4_rst_n_pcc3, sdmmc4_clk_pcc4,
+    clk2_req_pcc5, pex_l2_rst_n_pcc6, pex_l2_clkreq_n_pcc7,
+    pex_l0_prsnt_n_pdd0, pex_l0_rst_n_pdd1, pex_l0_clkreq_n_pdd2,
+    pex_wake_n_pdd3, pex_l1_prsnt_n_pdd4, pex_l1_rst_n_pdd5,
+    pex_l1_clkreq_n_pdd6, pex_l2_prsnt_n_pdd7, clk3_out_pee0, clk3_req_pee1,
+    clk1_req_pee2, hdmi_cec_pee3, clk_32k_in, core_pwr_req, cpu_pwr_req, owr,
+    pwr_int_n.
+
+  drive groups:
+
+    These all support nvidia,pull-down-strength, nvidia,pull-up-strength,
+    nvidia,slew_rate-rising, nvidia,slew_rate-falling. Most but not all
+    support nvidia,high-speed-mode, nvidia,schmitt, nvidia,low-power-mode.
+
+    ao1, ao2, at1, at2, at3, at4, at5, cdev1, cdev2, cec, crt, csus, dap1,
+    dap2, dap3, dap4, dbg, ddc, dev3, gma, gmb, gmc, gmd, gme, gmf, gmg,
+    gmh, gpv, lcd1, lcd2, owr, sdio1, sdio2, sdio3, spi, uaa, uab, uart2,
+    uart3, uda, vi1.
+
+Example:
+
+	pinctrl@70000000 {
+		compatible = "nvidia,tegra30-pinmux";
+		reg = < 0x70000868 0xd0     /* Pad control registers */
+			0x70003000 0x3e0 >; /* Mux registers */
+	};
+
+Example board file extract:
+
+	pinctrl@70000000 {
+		sdmmc4_default: pinmux {
+			sdmmc4_clk_pcc4 {
+				nvidia,pins =	"sdmmc4_clk_pcc4",
+						"sdmmc4_rst_n_pcc3";
+				nvidia,function = "sdmmc4";
+				nvidia,pull = <0>;
+				nvidia,tristate = <0>;
+			};
+			sdmmc4_dat0_paa0 {
+				nvidia,pins =	"sdmmc4_dat0_paa0",
+						"sdmmc4_dat1_paa1",
+						"sdmmc4_dat2_paa2",
+						"sdmmc4_dat3_paa3",
+						"sdmmc4_dat4_paa4",
+						"sdmmc4_dat5_paa5",
+						"sdmmc4_dat6_paa6",
+						"sdmmc4_dat7_paa7";
+				nvidia,function = "sdmmc4";
+				nvidia,pull = <2>;
+				nvidia,tristate = <0>;
+			};
+		};
+	};
+
+	sdhci@78000400 {
+		pinctrl-names = "default";
+		pinctrl-0 = <&sdmmc4_default>;
+	};
diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
new file mode 100644
index 00000000000..c95ea8278f8
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
@@ -0,0 +1,128 @@
+== Introduction ==
+
+Hardware modules that control pin multiplexing or configuration parameters
+such as pull-up/down, tri-state, drive-strength etc are designated as pin
+controllers. Each pin controller must be represented as a node in device tree,
+just like any other hardware module.
+
+Hardware modules whose signals are affected by pin configuration are
+designated client devices. Again, each client device must be represented as a
+node in device tree, just like any other hardware module.
+
+For a client device to operate correctly, certain pin controllers must
+set up certain specific pin configurations. Some client devices need a
+single static pin configuration, e.g. set up during initialization. Others
+need to reconfigure pins at run-time, for example to tri-state pins when the
+device is inactive. Hence, each client device can define a set of named
+states. The number and names of those states is defined by the client device's
+own binding.
+
+The common pinctrl bindings defined in this file provide an infrastructure
+for client device device tree nodes to map those state names to the pin
+configuration used by those states.
+
+Note that pin controllers themselves may also be client devices of themselves.
+For example, a pin controller may set up its own "active" state when the
+driver loads. This would allow representing a board's static pin configuration
+in a single place, rather than splitting it across multiple client device
+nodes. The decision to do this or not somewhat rests with the author of
+individual board device tree files, and any requirements imposed by the
+bindings for the individual client devices in use by that board, i.e. whether
+they require certain specific named states for dynamic pin configuration.
+
+== Pinctrl client devices ==
+
+For each client device individually, every pin state is assigned an integer
+ID. These numbers start at 0, and are contiguous. For each state ID, a unique
+property exists to define the pin configuration. Each state may also be
+assigned a name. When names are used, another property exists to map from
+those names to the integer IDs.
+
+Each client device's own binding determines the set of states the must be
+defined in its device tree node, and whether to define the set of state
+IDs that must be provided, or whether to define the set of state names that
+must be provided.
+
+Required properties:
+pinctrl-0:	List of phandles, each pointing at a pin configuration
+		node. These referenced pin configuration nodes must be child
+		nodes of the pin controller that they configure. Multiple
+		entries may exist in this list so that multiple pin
+		controllers may be configured, or so that a state may be built
+		from multiple nodes for a single pin controller, each
+		contributing part of the overall configuration. See the next
+		section of this document for details of the format of these
+		pin configuration nodes.
+
+		In some cases, it may be useful to define a state, but for it
+		to be empty. This may be required when a common IP block is
+		used in an SoC either without a pin controller, or where the
+		pin controller does not affect the HW module in question. If
+		the binding for that IP block requires certain pin states to
+		exist, they must still be defined, but may be left empty.
+
+Optional properties:
+pinctrl-1:	List of phandles, each pointing at a pin configuration
+		node within a pin controller.
+...
+pinctrl-n:	List of phandles, each pointing at a pin configuration
+		node within a pin controller.
+pinctrl-names:	The list of names to assign states. List entry 0 defines the
+		name for integer state ID 0, list entry 1 for state ID 1, and
+		so on.
+
+For example:
+
+	/* For a client device requiring named states */
+	device {
+		pinctrl-names = "active", "idle";
+		pinctrl-0 = <&state_0_node_a>;
+		pinctrl-1 = <&state_1_node_a &state_1_node_b>;
+	};
+
+	/* For the same device if using state IDs */
+	device {
+		pinctrl-0 = <&state_0_node_a>;
+		pinctrl-1 = <&state_1_node_a &state_1_node_b>;
+	};
+
+	/*
+	 * For an IP block whose binding supports pin configuration,
+	 * but in use on an SoC that doesn't have any pin control hardware
+	 */
+	device {
+		pinctrl-names = "active", "idle";
+		pinctrl-0 = <>;
+		pinctrl-1 = <>;
+	};
+
+== Pin controller devices ==
+
+Pin controller devices should contain the pin configuration nodes that client
+devices reference.
+
+For example:
+
+	pincontroller {
+		... /* Standard DT properties for the device itself elided */
+
+		state_0_node_a {
+			...
+		};
+		state_1_node_a {
+			...
+		};
+		state_1_node_b {
+			...
+		};
+	}
+
+The contents of each of those pin configuration child nodes is defined
+entirely by the binding for the individual pin controller device. There
+exists no common standard for this content.
+
+The pin configuration nodes need not be direct children of the pin controller
+device; they may be grandchildren, for example. Whether this is legal, and
+whether there is any interaction between the child and intermediate parent
+nodes, is again defined entirely by the binding for the individual pin
+controller device.
diff --git a/Documentation/devicetree/bindings/pinmux/pinmux_nvidia.txt b/Documentation/devicetree/bindings/pinmux/pinmux_nvidia.txt
deleted file mode 100644
index 36f82dbdd14..00000000000
--- a/Documentation/devicetree/bindings/pinmux/pinmux_nvidia.txt
+++ /dev/null
@@ -1,5 +0,0 @@
-NVIDIA Tegra 2 pinmux controller
-
-Required properties:
-- compatible : "nvidia,tegra20-pinmux"
-
diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt
index 2a596a4fc23..ef4fa7b423d 100644
--- a/Documentation/driver-model/devres.txt
+++ b/Documentation/driver-model/devres.txt
@@ -276,3 +276,7 @@ REGULATOR
   devm_regulator_get()
   devm_regulator_put()
   devm_regulator_bulk_get()
+
+PINCTRL
+  devm_pinctrl_get()
+  devm_pinctrl_put()
diff --git a/Documentation/pinctrl.txt b/Documentation/pinctrl.txt
index d97bccf4614..e40f4b4e197 100644
--- a/Documentation/pinctrl.txt
+++ b/Documentation/pinctrl.txt
@@ -152,11 +152,9 @@ static const struct foo_group foo_groups[] = {
 };
 
 
-static int foo_list_groups(struct pinctrl_dev *pctldev, unsigned selector)
+static int foo_get_groups_count(struct pinctrl_dev *pctldev)
 {
-	if (selector >= ARRAY_SIZE(foo_groups))
-		return -EINVAL;
-	return 0;
+	return ARRAY_SIZE(foo_groups);
 }
 
 static const char *foo_get_group_name(struct pinctrl_dev *pctldev,
@@ -175,7 +173,7 @@ static int foo_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector,
 }
 
 static struct pinctrl_ops foo_pctrl_ops = {
-	.list_groups = foo_list_groups,
+	.get_groups_count = foo_get_groups_count,
 	.get_group_name = foo_get_group_name,
 	.get_group_pins = foo_get_group_pins,
 };
@@ -186,13 +184,12 @@ static struct pinctrl_desc foo_desc = {
        .pctlops = &foo_pctrl_ops,
 };
 
-The pin control subsystem will call the .list_groups() function repeatedly
-beginning on 0 until it returns non-zero to determine legal selectors, then
-it will call the other functions to retrieve the name and pins of the group.
-Maintaining the data structure of the groups is up to the driver, this is
-just a simple example - in practice you may need more entries in your group
-structure, for example specific register ranges associated with each group
-and so on.
+The pin control subsystem will call the .get_groups_count() function to
+determine total number of legal selectors, then it will call the other functions
+to retrieve the name and pins of the group. Maintaining the data structure of
+the groups is up to the driver, this is just a simple example - in practice you
+may need more entries in your group structure, for example specific register
+ranges associated with each group and so on.
 
 
 Pin configuration
@@ -606,11 +603,9 @@ static const struct foo_group foo_groups[] = {
 };
 
 
-static int foo_list_groups(struct pinctrl_dev *pctldev, unsigned selector)
+static int foo_get_groups_count(struct pinctrl_dev *pctldev)
 {
-	if (selector >= ARRAY_SIZE(foo_groups))
-		return -EINVAL;
-	return 0;
+	return ARRAY_SIZE(foo_groups);
 }
 
 static const char *foo_get_group_name(struct pinctrl_dev *pctldev,
@@ -629,7 +624,7 @@ static int foo_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector,
 }
 
 static struct pinctrl_ops foo_pctrl_ops = {
-	.list_groups = foo_list_groups,
+	.get_groups_count = foo_get_groups_count,
 	.get_group_name = foo_get_group_name,
 	.get_group_pins = foo_get_group_pins,
 };
@@ -640,7 +635,7 @@ struct foo_pmx_func {
 	const unsigned num_groups;
 };
 
-static const char * const spi0_groups[] = { "spi0_1_grp" };
+static const char * const spi0_groups[] = { "spi0_0_grp", "spi0_1_grp" };
 static const char * const i2c0_groups[] = { "i2c0_grp" };
 static const char * const mmc0_groups[] = { "mmc0_1_grp", "mmc0_2_grp",
 					"mmc0_3_grp" };
@@ -663,11 +658,9 @@ static const struct foo_pmx_func foo_functions[] = {
 	},
 };
 
-int foo_list_funcs(struct pinctrl_dev *pctldev, unsigned selector)
+int foo_get_functions_count(struct pinctrl_dev *pctldev)
 {
-	if (selector >= ARRAY_SIZE(foo_functions))
-		return -EINVAL;
-	return 0;
+	return ARRAY_SIZE(foo_functions);
 }
 
 const char *foo_get_fname(struct pinctrl_dev *pctldev, unsigned selector)
@@ -703,7 +696,7 @@ void foo_disable(struct pinctrl_dev *pctldev, unsigned selector,
 }
 
 struct pinmux_ops foo_pmxops = {
-	.list_functions = foo_list_funcs,
+	.get_functions_count = foo_get_functions_count,
 	.get_function_name = foo_get_fname,
 	.get_function_groups = foo_get_groups,
 	.enable = foo_enable,
@@ -786,7 +779,7 @@ and spi on the second function mapping:
 
 #include <linux/pinctrl/machine.h>
 
-static const struct pinctrl_map __initdata mapping[] = {
+static const struct pinctrl_map mapping[] __initconst = {
 	{
 		.dev_name = "foo-spi.0",
 		.name = PINCTRL_STATE_DEFAULT,
@@ -952,13 +945,13 @@ case), we define a mapping like this:
 The result of grabbing this mapping from the device with something like
 this (see next paragraph):
 
-	p = pinctrl_get(dev);
+	p = devm_pinctrl_get(dev);
 	s = pinctrl_lookup_state(p, "8bit");
 	ret = pinctrl_select_state(p, s);
 
 or more simply:
 
-	p = pinctrl_get_select(dev, "8bit");
+	p = devm_pinctrl_get_select(dev, "8bit");
 
 Will be that you activate all the three bottom records in the mapping at
 once. Since they share the same name, pin controller device, function and
@@ -992,7 +985,7 @@ foo_probe()
 	/* Allocate a state holder named "foo" etc */
 	struct foo_state *foo = ...;
 
-	foo->p = pinctrl_get(&device);
+	foo->p = devm_pinctrl_get(&device);
 	if (IS_ERR(foo->p)) {
 		/* FIXME: clean up "foo" here */
 		return PTR_ERR(foo->p);
@@ -1000,24 +993,17 @@ foo_probe()
 
 	foo->s = pinctrl_lookup_state(foo->p, PINCTRL_STATE_DEFAULT);
 	if (IS_ERR(foo->s)) {
-		pinctrl_put(foo->p);
 		/* FIXME: clean up "foo" here */
 		return PTR_ERR(s);
 	}
 
 	ret = pinctrl_select_state(foo->s);
 	if (ret < 0) {
-		pinctrl_put(foo->p);
 		/* FIXME: clean up "foo" here */
 		return ret;
 	}
 }
 
-foo_remove()
-{
-	pinctrl_put(state->p);
-}
-
 This get/lookup/select/put sequence can just as well be handled by bus drivers
 if you don't want each and every driver to handle it and you know the
 arrangement on your bus.
@@ -1029,6 +1015,11 @@ The semantics of the pinctrl APIs are:
   kernel memory to hold the pinmux state. All mapping table parsing or similar
   slow operations take place within this API.
 
+- devm_pinctrl_get() is a variant of pinctrl_get() that causes pinctrl_put()
+  to be called automatically on the retrieved pointer when the associated
+  device is removed. It is recommended to use this function over plain
+  pinctrl_get().
+
 - pinctrl_lookup_state() is called in process context to obtain a handle to a
   specific state for a the client device. This operation may be slow too.
 
@@ -1041,14 +1032,30 @@ The semantics of the pinctrl APIs are:
 
 - pinctrl_put() frees all information associated with a pinctrl handle.
 
+- devm_pinctrl_put() is a variant of pinctrl_put() that may be used to
+  explicitly destroy a pinctrl object returned by devm_pinctrl_get().
+  However, use of this function will be rare, due to the automatic cleanup
+  that will occur even without calling it.
+
+  pinctrl_get() must be paired with a plain pinctrl_put().
+  pinctrl_get() may not be paired with devm_pinctrl_put().
+  devm_pinctrl_get() can optionally be paired with devm_pinctrl_put().
+  devm_pinctrl_get() may not be paired with plain pinctrl_put().
+
 Usually the pin control core handled the get/put pair and call out to the
 device drivers bookkeeping operations, like checking available functions and
 the associated pins, whereas the enable/disable pass on to the pin controller
 driver which takes care of activating and/or deactivating the mux setting by
 quickly poking some registers.
 
-The pins are allocated for your device when you issue the pinctrl_get() call,
-after this you should be able to see this in the debugfs listing of all pins.
+The pins are allocated for your device when you issue the devm_pinctrl_get()
+call, after this you should be able to see this in the debugfs listing of all
+pins.
+
+NOTE: the pinctrl system will return -EPROBE_DEFER if it cannot find the
+requested pinctrl handles, for example if the pinctrl driver has not yet
+registered. Thus make sure that the error path in your driver gracefully
+cleans up and is ready to retry the probing later in the startup process.
 
 
 System pin control hogging
@@ -1094,13 +1101,13 @@ it, disables and releases it, and muxes it in on the pins defined by group B:
 
 #include <linux/pinctrl/consumer.h>
 
-foo_switch()
-{
-	struct pinctrl *p;
-	struct pinctrl_state *s1, *s2;
+struct pinctrl *p;
+struct pinctrl_state *s1, *s2;
 
+foo_probe()
+{
 	/* Setup */
-	p = pinctrl_get(&device);
+	p = devm_pinctrl_get(&device);
 	if (IS_ERR(p))
 		...
 
@@ -1111,7 +1118,10 @@ foo_switch()
 	s2 = pinctrl_lookup_state(foo->p, "pos-B");
 	if (IS_ERR(s2))
 		...
+}
 
+foo_switch()
+{
 	/* Enable on position A */
 	ret = pinctrl_select_state(s1);
 	if (ret < 0)
@@ -1125,8 +1135,6 @@ foo_switch()
 	    ...
 
 	...
-
-	pinctrl_put(p);
 }
 
 The above has to be done from process context.