Date: Sat, 3 Mar 2018 21:41:16 +0000 (UTC) From: Ian Lepore <ian@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r330358 - head/share/man/man4 Message-ID: <201803032141.w23LfGjf069878@repo.freebsd.org>
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Author: ian Date: Sat Mar 3 21:41:16 2018 New Revision: 330358 URL: https://svnweb.freebsd.org/changeset/base/330358 Log: Minor changes to wording. Modified: head/share/man/man4/fdt_pinctrl.4 Modified: head/share/man/man4/fdt_pinctrl.4 ============================================================================== --- head/share/man/man4/fdt_pinctrl.4 Sat Mar 3 21:23:31 2018 (r330357) +++ head/share/man/man4/fdt_pinctrl.4 Sat Mar 3 21:41:16 2018 (r330358) @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd March 2, 2018 +.Dd March 3, 2018 .Dt "FDT_PINCTRL" 4 .Os .Sh NAME @@ -36,13 +36,13 @@ .Pp Pin multiplexing is a technology used to re-purpose a single physical connection (depending on chip packaging it may be -pin, ball, or pad) to pull signal from one of SoC internal -controllers to peripheral devices. +pin, ball, or pad) by routing its signal to any one of several +different SoC internal devices. For example, based on the actual device design, a single SoC chip -pin can perform any of these roles: SPI clock, I2C +pin might perform any of these roles: SPI clock, I2C data, GPIO pin, or PWM signal. Function selection is performed by the pinmux controller, a SoC -hardware block, usually controlled a set of registers. +hardware block which is usually controlled by a set of registers. Pinmux controller capabilities and register format depend on the actual hardware implementation. .Pp @@ -104,11 +104,11 @@ backlight@7f000000 { } .Ed .Pp -The pinctrl driver should implement FDT_PINCTRL_CONFIGURE -method, register itself as pin configuration handler by +The pinctrl driver should implement the FDT_PINCTRL_CONFIGURE +method, register itself as a pin configuration handler by calling fdt_pinctrl_register function, and call .Xr fdt_pinctrl_configure_tree 9 -to configure pins for all enabled devices (device where +to configure pins for all enabled devices (devices where the "status" property is not set to "disabled"). .Sh SEE ALSO .Xr fdt_pinctrl 9
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