mirror of
https://github.com/torvalds/linux.git
synced 2024-12-25 20:32:22 +00:00
2ba08d75eb
Add pinctrl bindings for Actions Semi S900 SoC Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
179 lines
9.0 KiB
Plaintext
179 lines
9.0 KiB
Plaintext
Actions Semi S900 Pin Controller
|
|
|
|
This binding describes the pin controller found in the S900 SoC.
|
|
|
|
Required Properties:
|
|
|
|
- compatible: Should be "actions,s900-pinctrl"
|
|
- reg: Should contain the register base address and size of
|
|
the pin controller.
|
|
- clocks: phandle of the clock feeding the pin controller
|
|
|
|
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".
|
|
|
|
The pin configuration nodes act as a container for an arbitrary 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 group(s), and various pin configuration
|
|
parameters, such as pull-up, drive strength, etc.
|
|
|
|
PIN CONFIGURATION NODES:
|
|
|
|
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.
|
|
|
|
Pinmux functions are available only for the pin groups while pinconf
|
|
parameters are available for both pin groups and individual pins.
|
|
|
|
The following generic properties as defined in pinctrl-bindings.txt are valid
|
|
to specify in a pin configuration subnode:
|
|
|
|
Required Properties:
|
|
|
|
- pins: An array of strings, each string containing the name of a pin.
|
|
These pins are used for selecting the pull control and schmitt
|
|
trigger parameters. The following are the list of pins
|
|
available:
|
|
|
|
eth_txd0, eth_txd1, eth_txen, eth_rxer, eth_crs_dv,
|
|
eth_rxd1, eth_rxd0, eth_ref_clk, eth_mdc, eth_mdio,
|
|
sirq0, sirq1, sirq2, i2s_d0, i2s_bclk0, i2s_lrclk0,
|
|
i2s_mclk0, i2s_d1, i2s_bclk1, i2s_lrclk1, i2s_mclk1,
|
|
pcm1_in, pcm1_clk, pcm1_sync, pcm1_out, eram_a5,
|
|
eram_a6, eram_a7, eram_a8, eram_a9, eram_a10, eram_a11,
|
|
lvds_oep, lvds_oen, lvds_odp, lvds_odn, lvds_ocp,
|
|
lvds_ocn, lvds_obp, lvds_obn, lvds_oap, lvds_oan,
|
|
lvds_eep, lvds_een, lvds_edp, lvds_edn, lvds_ecp,
|
|
lvds_ecn, lvds_ebp, lvds_ebn, lvds_eap, lvds_ean,
|
|
sd0_d0, sd0_d1, sd0_d2, sd0_d3, sd1_d0, sd1_d1,
|
|
sd1_d2, sd1_d3, sd0_cmd, sd0_clk, sd1_cmd, sd1_clk,
|
|
spi0_sclk, spi0_ss, spi0_miso, spi0_mosi, uart0_rx,
|
|
uart0_tx, uart2_rx, uart2_tx, uart2_rtsb, uart2_ctsb,
|
|
uart3_rx, uart3_tx, uart3_rtsb, uart3_ctsb, uart4_rx,
|
|
uart4_tx, i2c0_sclk, i2c0_sdata, i2c1_sclk, i2c1_sdata,
|
|
i2c2_sclk, i2c2_sdata, csi0_dn0, csi0_dp0, csi0_dn1,
|
|
csi0_dp1, csi0_cn, csi0_cp, csi0_dn2, csi0_dp2, csi0_dn3,
|
|
csi0_dp3, dsi_dp3, dsi_dn3, dsi_dp1, dsi_dn1, dsi_cp,
|
|
dsi_cn, dsi_dp0, dsi_dn0, dsi_dp2, dsi_dn2, sensor0_pclk,
|
|
csi1_dn0,csi1_dp0,csi1_dn1, csi1_dp1, csi1_cn, csi1_cp,
|
|
sensor0_ckout, nand0_d0, nand0_d1, nand0_d2, nand0_d3,
|
|
nand0_d4, nand0_d5, nand0_d6, nand0_d7, nand0_dqs,
|
|
nand0_dqsn, nand0_ale, nand0_cle, nand0_ceb0, nand0_ceb1,
|
|
nand0_ceb2, nand0_ceb3, nand1_d0, nand1_d1, nand1_d2,
|
|
nand1_d3, nand1_d4, nand1_d5, nand1_d6, nand1_d7, nand1_dqs,
|
|
nand1_dqsn, nand1_ale, nand1_cle, nand1_ceb0, nand1_ceb1,
|
|
nand1_ceb2, nand1_ceb3, sgpio0, sgpio1, sgpio2, sgpio3
|
|
|
|
- groups: An array of strings, each string containing the name of a pin
|
|
group. These pin groups are used for selecting the pinmux
|
|
functions.
|
|
|
|
lvds_oxx_uart4_mfp, rmii_mdc_mfp, rmii_mdio_mfp, sirq0_mfp,
|
|
sirq1_mfp, rmii_txd0_mfp, rmii_txd1_mfp, rmii_txen_mfp,
|
|
rmii_rxer_mfp, rmii_crs_dv_mfp, rmii_rxd1_mfp, rmii_rxd0_mfp,
|
|
rmii_ref_clk_mfp, i2s_d0_mfp, i2s_d1_mfp, i2s_lr_m_clk0_mfp,
|
|
i2s_bclk0_mfp, i2s_bclk1_mclk1_mfp, pcm1_in_out_mfp,
|
|
pcm1_clk_mfp, pcm1_sync_mfp, eram_a5_mfp, eram_a6_mfp,
|
|
eram_a7_mfp, eram_a8_mfp, eram_a9_mfp, eram_a10_mfp,
|
|
eram_a11_mfp, lvds_oep_odn_mfp, lvds_ocp_obn_mfp,
|
|
lvds_oap_oan_mfp, lvds_e_mfp, spi0_sclk_mosi_mfp, spi0_ss_mfp,
|
|
spi0_miso_mfp, uart2_rtsb_mfp, uart2_ctsb_mfp, uart3_rtsb_mfp,
|
|
uart3_ctsb_mfp, sd0_d0_mfp, sd0_d1_mfp, sd0_d2_d3_mfp,
|
|
sd1_d0_d3_mfp, sd0_cmd_mfp, sd0_clk_mfp, sd1_cmd_clk_mfp,
|
|
uart0_rx_mfp, nand0_d0_ceb3_mfp, uart0_tx_mfp, i2c0_mfp,
|
|
csi0_cn_cp_mfp, csi0_dn0_dp3_mfp, csi1_dn0_cp_mfp,
|
|
dsi_dp3_dn1_mfp, dsi_cp_dn0_mfp, dsi_dp2_dn2_mfp,
|
|
nand1_d0_ceb1_mfp, nand1_ceb3_mfp, nand1_ceb0_mfp,
|
|
csi1_dn0_dp0_mfp, uart4_rx_tx_mfp
|
|
|
|
|
|
These pin groups are used for selecting the drive strength
|
|
parameters.
|
|
|
|
sgpio3_drv, sgpio2_drv, sgpio1_drv, sgpio0_drv,
|
|
rmii_tx_d0_d1_drv, rmii_txen_rxer_drv, rmii_crs_dv_drv,
|
|
rmii_rx_d1_d0_drv, rmii_ref_clk_drv, rmii_mdc_mdio_drv,
|
|
sirq_0_1_drv, sirq2_drv, i2s_d0_d1_drv, i2s_lr_m_clk0_drv,
|
|
i2s_blk1_mclk1_drv, pcm1_in_out_drv, lvds_oap_oan_drv,
|
|
lvds_oep_odn_drv, lvds_ocp_obn_drv, lvds_e_drv, sd0_d3_d0_drv,
|
|
sd1_d3_d0_drv, sd0_sd1_cmd_clk_drv, spi0_sclk_mosi_drv,
|
|
spi0_ss_miso_drv, uart0_rx_tx_drv, uart4_rx_tx_drv, uart2_drv,
|
|
uart3_drv, i2c0_drv, i2c1_drv, i2c2_drv, sensor0_drv
|
|
|
|
These pin groups are used for selecting the slew rate
|
|
parameters.
|
|
|
|
sgpio3_sr, sgpio2_sr, sgpio1_sr, sgpio0_sr, rmii_tx_d0_d1_sr,
|
|
rmii_txen_rxer_sr, rmii_crs_dv_sr, rmii_rx_d1_d0_sr,
|
|
rmii_ref_clk_sr, rmii_mdc_mdio_sr, sirq_0_1_sr, sirq2_sr,
|
|
i2s_do_d1_sr, i2s_lr_m_clk0_sr, i2s_bclk0_mclk1_sr,
|
|
pcm1_in_out_sr, sd1_d3_d0_sr, sd0_sd1_clk_cmd_sr,
|
|
spi0_sclk_mosi_sr, spi0_ss_miso_sr, uart0_rx_tx_sr,
|
|
uart4_rx_tx_sr, uart2_sr, uart3_sr, i2c0_sr, i2c1_sr, i2c2_sr,
|
|
sensor0_sr
|
|
|
|
- function: An array of strings, each string containing the name of the
|
|
pinmux functions. These functions can only be selected by
|
|
the corresponding pin groups. The following are the list of
|
|
pinmux functions available:
|
|
|
|
eram, eth_rmii, eth_smii, spi0, spi1, spi2, spi3, sens0,
|
|
uart0, uart1, uart2, uart3, uart4, uart5, uart6, i2s0, i2s1,
|
|
pcm0, pcm1, jtag, pwm0, pwm1, pwm2, pwm3, pwm4, pwm5, sd0,
|
|
sd1, sd2, sd3, i2c0, i2c1, i2c2, i2c3, i2c4, i2c5, lvds,
|
|
usb30, usb20, gpu, mipi_csi0, mipi_csi1, mipi_dsi, nand0,
|
|
nand1, spdif, sirq0, sirq1, sirq2
|
|
|
|
Optional Properties:
|
|
|
|
- bias-bus-hold: No arguments. The specified pins should retain the previous
|
|
state value.
|
|
- bias-high-impedance: No arguments. The specified pins should be configured
|
|
as high impedance.
|
|
- bias-pull-down: No arguments. The specified pins should be configured as
|
|
pull down.
|
|
- bias-pull-up: No arguments. The specified pins should be configured as
|
|
pull up.
|
|
- input-schmitt-enable: No arguments: Enable schmitt trigger for the specified
|
|
pins
|
|
- input-schmitt-disable: No arguments: Disable schmitt trigger for the specified
|
|
pins
|
|
- slew-rate: Integer. Sets slew rate for the specified pins.
|
|
Valid values are:
|
|
<0> - Slow
|
|
<1> - Fast
|
|
- drive-strength: Integer. Selects the drive strength for the specified
|
|
pins in mA.
|
|
Valid values are:
|
|
<2>
|
|
<4>
|
|
<8>
|
|
<12>
|
|
|
|
Example:
|
|
|
|
pinctrl: pinctrl@e01b0000 {
|
|
compatible = "actions,s900-pinctrl";
|
|
reg = <0x0 0xe01b0000 0x0 0x1000>;
|
|
clocks = <&cmu CLK_GPIO>;
|
|
|
|
uart2-default: uart2-default {
|
|
pinmux {
|
|
groups = "lvds_oep_odn_mfp";
|
|
function = "uart2";
|
|
};
|
|
pinconf {
|
|
groups = "lvds_oep_odn_drv";
|
|
drive-strength = <12>;
|
|
};
|
|
};
|
|
};
|