Implement subroutines for parsing out some of the generic properties
specified in the pinctrl bindings, and adapt Meson, Rockchip, and Allwinner pinctrl back-ends to use them. Ok jmcneill@
This commit is contained in:
thorpej
parent
b155c19ac3
commit
dfaf6e7909
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@ -1,4 +1,4 @@
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/* $NetBSD: meson_pinctrl.c,v 1.1 2019/01/19 20:56:03 jmcneill Exp $ */
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/* $NetBSD: meson_pinctrl.c,v 1.2 2019/01/23 04:21:54 thorpej Exp $ */
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/*-
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* Copyright (c) 2019 Jared D. McNeill <jmcneill@invisible.ca>
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@ -29,7 +29,7 @@
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#include "opt_soc.h"
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: meson_pinctrl.c,v 1.1 2019/01/19 20:56:03 jmcneill Exp $");
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__KERNEL_RCSID(0, "$NetBSD: meson_pinctrl.c,v 1.2 2019/01/23 04:21:54 thorpej Exp $");
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#include <sys/param.h>
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#include <sys/bus.h>
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@ -170,10 +170,9 @@ meson_pinctrl_set_config(device_t dev, const void *data, size_t len)
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if (mux == -1)
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return -1;
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groups_len = OF_getproplen(mux, "groups");
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if (groups_len <= 0)
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groups = fdtbus_pinctrl_parse_groups(mux, &groups_len);
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if (groups == NULL)
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return -1;
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groups = fdtbus_get_string(mux, "groups");
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for (; groups_len > 0;
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groups_len -= strlen(groups) + 1, groups += strlen(groups) + 1) {
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@ -1,4 +1,4 @@
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/* $NetBSD: rk3328_iomux.c,v 1.1 2018/08/12 16:48:04 jmcneill Exp $ */
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/* $NetBSD: rk3328_iomux.c,v 1.2 2019/01/23 04:21:54 thorpej Exp $ */
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/*-
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* Copyright (c) 2018 Jared McNeill <jmcneill@invisible.ca>
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@ -27,7 +27,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: rk3328_iomux.c,v 1.1 2018/08/12 16:48:04 jmcneill Exp $");
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__KERNEL_RCSID(0, "$NetBSD: rk3328_iomux.c,v 1.2 2019/01/23 04:21:54 thorpej Exp $");
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#include <sys/param.h>
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#include <sys/bus.h>
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@ -190,42 +190,49 @@ rk3328_iomux_set_mux(struct rk3328_iomux_softc *sc, u_int bank, u_int idx, u_int
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static int
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rk3328_iomux_config(struct rk3328_iomux_softc *sc, const int phandle, u_int bank, u_int idx, u_int mux)
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{
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u_int drv;
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if (of_hasprop(phandle, "bias-disable"))
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const int bias = fdtbus_pinctrl_parse_bias(phandle, NULL);
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switch (bias) {
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case 0:
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rk3328_iomux_set_bias(sc, bank, idx, GRF_GPIO_P_CTL_Z);
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else if (of_hasprop(phandle, "bias-pull-up"))
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break;
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case GPIO_PIN_PULLUP:
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rk3328_iomux_set_bias(sc, bank, idx, GRF_GPIO_P_CTL_PULLUP);
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else if (of_hasprop(phandle, "bias-pull-down"))
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break;
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case GPIO_PIN_PULLDOWN:
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rk3328_iomux_set_bias(sc, bank, idx, GRF_GPIO_P_CTL_PULLDOWN);
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break;
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}
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if (of_getprop_uint32(phandle, "drive-strength", &drv) == 0) {
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switch (drv) {
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case 2:
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rk3328_iomux_set_drive_strength(sc, bank, idx, GRF_GPIO_E_CTL_2MA);
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break;
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case 4:
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rk3328_iomux_set_drive_strength(sc, bank, idx, GRF_GPIO_E_CTL_4MA);
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break;
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case 8:
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rk3328_iomux_set_drive_strength(sc, bank, idx, GRF_GPIO_E_CTL_8MA);
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break;
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case 12:
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rk3328_iomux_set_drive_strength(sc, bank, idx, GRF_GPIO_E_CTL_12MA);
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break;
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default:
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aprint_error_dev(sc->sc_dev, "unsupported drive-strength %u\n", drv);
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return EINVAL;
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}
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const int drv = fdtbus_pinctrl_parse_drive_strength(phandle);
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switch (drv) {
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case -1:
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break;
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case 2:
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rk3328_iomux_set_drive_strength(sc, bank, idx, GRF_GPIO_E_CTL_2MA);
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break;
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case 4:
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rk3328_iomux_set_drive_strength(sc, bank, idx, GRF_GPIO_E_CTL_4MA);
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break;
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case 8:
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rk3328_iomux_set_drive_strength(sc, bank, idx, GRF_GPIO_E_CTL_8MA);
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break;
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case 12:
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rk3328_iomux_set_drive_strength(sc, bank, idx, GRF_GPIO_E_CTL_12MA);
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break;
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default:
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aprint_error_dev(sc->sc_dev, "unsupported drive-strength %u\n", drv);
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return EINVAL;
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}
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#if notyet
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if (of_hasprop(phandle, "input-enable"))
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rk3328_iomux_set_direction(sc, bank, idx, GPIO_PIN_INPUT, -1);
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else if (of_hasprop(phandle, "output-high"))
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rk3328_iomux_set_direction(sc, bank, idx, GPIO_PIN_OUTPUT, GPIO_PIN_HIGH);
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else if (of_hasprop(phandle, "output-low"))
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rk3328_iomux_set_direction(sc, bank, idx, GPIO_PIN_OUTPUT, GPIO_PIN_LOW);
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int output_value;
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const int direction =
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fdtbus_pinctrl_parse_input_output(phandle, &output_value);
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if (direction != -1) {
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rk3328_iomux_set_direction(sc, bank, idx, direction,
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output_value);
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}
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#endif
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rk3328_iomux_set_mux(sc, bank, idx, mux);
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@ -1,4 +1,4 @@
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/* $NetBSD: rk3399_iomux.c,v 1.1 2018/08/12 16:48:05 jmcneill Exp $ */
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/* $NetBSD: rk3399_iomux.c,v 1.2 2019/01/23 04:21:54 thorpej Exp $ */
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/*-
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* Copyright (c) 2018 Jared McNeill <jmcneill@invisible.ca>
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@ -29,7 +29,7 @@
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//#define RK3399_IOMUX_DEBUG
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: rk3399_iomux.c,v 1.1 2018/08/12 16:48:05 jmcneill Exp $");
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__KERNEL_RCSID(0, "$NetBSD: rk3399_iomux.c,v 1.2 2019/01/23 04:21:54 thorpej Exp $");
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#include <sys/param.h>
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#include <sys/bus.h>
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@ -348,27 +348,24 @@ rk3399_iomux_set_mux(struct rk3399_iomux_softc *sc, u_int bank, u_int idx, u_int
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static int
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rk3399_iomux_config(struct rk3399_iomux_softc *sc, const int phandle, u_int bank, u_int idx, u_int mux)
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{
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u_int drv;
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if (of_hasprop(phandle, "bias-disable"))
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rk3399_iomux_set_bias(sc, bank, idx, 0);
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else if (of_hasprop(phandle, "bias-pull-up"))
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rk3399_iomux_set_bias(sc, bank, idx, GPIO_PIN_PULLUP);
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else if (of_hasprop(phandle, "bias-pull-down"))
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rk3399_iomux_set_bias(sc, bank, idx, GPIO_PIN_PULLDOWN);
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const int bias = fdtbus_pinctrl_parse_bias(phandle, NULL);
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if (bias != -1)
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rk3399_iomux_set_bias(sc, bank, idx, bias);
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if (of_getprop_uint32(phandle, "drive-strength", &drv) == 0) {
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if (rk3399_iomux_set_drive_strength(sc, bank, idx, drv) != 0)
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return EINVAL;
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}
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const int drv = fdtbus_pinctrl_parse_drive_strength(phandle);
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if (drv != -1 &&
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rk3399_iomux_set_drive_strength(sc, bank, idx, drv) != 0)
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return EINVAL;
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#if notyet
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if (of_hasprop(phandle, "input-enable"))
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rk3399_iomux_set_direction(sc, bank, idx, GPIO_PIN_INPUT, -1);
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else if (of_hasprop(phandle, "output-high"))
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rk3399_iomux_set_direction(sc, bank, idx, GPIO_PIN_OUTPUT, GPIO_PIN_HIGH);
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else if (of_hasprop(phandle, "output-low"))
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rk3399_iomux_set_direction(sc, bank, idx, GPIO_PIN_OUTPUT, GPIO_PIN_LOW);
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int output_value;
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const int direction =
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fdtbus_pinctrl_parse_input_output(phandle, &output_value);
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if (direction != -1) {
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rk3399_iomux_set_direction(sc, bank, idx, direction,
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output_value);
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}
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#endif
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rk3399_iomux_set_mux(sc, bank, idx, mux);
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@ -1,4 +1,4 @@
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/* $NetBSD: sunxi_gpio.c,v 1.21 2018/05/31 20:52:53 jmcneill Exp $ */
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/* $NetBSD: sunxi_gpio.c,v 1.22 2019/01/23 04:21:54 thorpej Exp $ */
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/*-
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* Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca>
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@ -29,7 +29,7 @@
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#include "opt_soc.h"
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: sunxi_gpio.c,v 1.21 2018/05/31 20:52:53 jmcneill Exp $");
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__KERNEL_RCSID(0, "$NetBSD: sunxi_gpio.c,v 1.22 2019/01/23 04:21:54 thorpej Exp $");
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#include <sys/param.h>
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#include <sys/bus.h>
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@ -582,7 +582,7 @@ sunxi_pinctrl_parse_function(int phandle)
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{
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const char *function;
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function = fdtbus_get_string(phandle, "function");
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function = fdtbus_pinctrl_parse_function(phandle);
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if (function != NULL)
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return function;
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@ -592,13 +592,12 @@ sunxi_pinctrl_parse_function(int phandle)
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static const char *
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sunxi_pinctrl_parse_pins(int phandle, int *pins_len)
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{
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const char *pins;
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int len;
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len = OF_getproplen(phandle, "pins");
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if (len > 0) {
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*pins_len = len;
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return fdtbus_get_string(phandle, "pins");
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}
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pins = fdtbus_pinctrl_parse_pins(phandle, pins_len);
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if (pins != NULL)
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return pins;
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len = OF_getproplen(phandle, "allwinner,pins");
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if (len > 0) {
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@ -613,15 +612,13 @@ static int
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sunxi_pinctrl_parse_bias(int phandle)
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{
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u_int pull;
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int bias = -1;
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int bias;
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if (of_hasprop(phandle, "bias-disable"))
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bias = 0;
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else if (of_hasprop(phandle, "bias-pull-up"))
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bias = GPIO_PIN_PULLUP;
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else if (of_hasprop(phandle, "bias-pull-down"))
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bias = GPIO_PIN_PULLDOWN;
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else if (of_getprop_uint32(phandle, "allwinner,pull", &pull) == 0) {
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bias = fdtbus_pinctrl_parse_bias(phandle, NULL);
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if (bias != -1)
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return bias;
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if (of_getprop_uint32(phandle, "allwinner,pull", &pull) == 0) {
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switch (pull) {
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case 0:
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bias = 0;
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@ -643,7 +640,8 @@ sunxi_pinctrl_parse_drive_strength(int phandle)
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{
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int val;
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if (of_getprop_uint32(phandle, "drive-strength", &val) == 0)
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val = fdtbus_pinctrl_parse_drive_strength(phandle);
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if (val != -1)
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return val;
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if (of_getprop_uint32(phandle, "allwinner,drive", &val) == 0)
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@ -1,6 +1,7 @@
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/* $NetBSD: fdt_pinctrl.c,v 1.6 2019/01/14 12:23:53 mlelstv Exp $ */
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/* $NetBSD: fdt_pinctrl.c,v 1.7 2019/01/23 04:23:01 thorpej Exp $ */
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/*-
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* Copyright (c) 2019 Jason R. Thorpe
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* Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca>
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* Copyright (c) 2015 Martin Fouts
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* All rights reserved.
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@ -28,10 +29,11 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: fdt_pinctrl.c,v 1.6 2019/01/14 12:23:53 mlelstv Exp $");
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__KERNEL_RCSID(0, "$NetBSD: fdt_pinctrl.c,v 1.7 2019/01/23 04:23:01 thorpej Exp $");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/gpio.h>
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#include <sys/kmem.h>
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#include <sys/queue.h>
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@ -166,3 +168,192 @@ fdtbus_pinctrl_configure(void)
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{
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fdtbus_pinctrl_configure_node(OF_finddevice("/"));
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}
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/*
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* Helper routines for parsing put properties related to pinctrl bindings.
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*/
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/*
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* Pin mux settings apply to sets of pins specified by one of 3
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* sets of properties:
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*
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* - "pins" + "function"
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* - "groups" + "function"
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* - "pinmux"
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*
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* Eactly one of those 3 combinations must be specified.
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*/
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const char *
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fdtbus_pinctrl_parse_function(int phandle)
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{
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return fdtbus_get_string(phandle, "function");
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}
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const void *
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fdtbus_pinctrl_parse_pins(int phandle, int *pins_len)
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{
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int len;
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/*
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* The pinctrl bindings specify that entries in "pins"
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* may be integers or strings; this is determined by
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* the hardware-specific binding.
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*/
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len = OF_getproplen(phandle, "pins");
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if (len > 0) {
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return fdtbus_get_prop(phandle, "pins", pins_len);
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}
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return NULL;
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}
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const char *
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fdtbus_pinctrl_parse_groups(int phandle, int *groups_len)
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{
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int len;
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len = OF_getproplen(phandle, "groups");
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if (len > 0) {
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*groups_len = len;
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return fdtbus_get_string(phandle, "groups");
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}
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return NULL;
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}
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const u_int *
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fdtbus_pinctrl_parse_pinmux(int phandle, int *pinmux_len)
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{
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int len;
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len = OF_getproplen(phandle, "pinmux");
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if (len > 0) {
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return fdtbus_get_prop(phandle, "pinmux", pinmux_len);
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}
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return NULL;
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}
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int
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fdtbus_pinctrl_parse_bias(int phandle, int *pull_strength)
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{
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const char *bias_prop = NULL;
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int bias = -1;
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/*
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* bias-pull-{up,down,pin-default} properties have an optional
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* argument: the pull strength in Ohms. (In practice, this is
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* sometimes a hardware-specific constant.)
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*
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* XXXJRT How to represent bias-pull-pin-default?
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*/
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if (of_hasprop(phandle, "bias-disable")) {
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bias = 0;
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} else if (of_hasprop(phandle, "bias-pull-up")) {
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bias_prop = "bias-pull-up";
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bias = GPIO_PIN_PULLUP;
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} else if (of_hasprop(phandle, "bias-pull-down")) {
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bias_prop = "bias-pull-down";
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bias = GPIO_PIN_PULLDOWN;
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}
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if (pull_strength) {
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*pull_strength = -1;
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if (bias_prop) {
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uint32_t val;
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if (of_getprop_uint32(phandle, bias_prop, &val) == 0) {
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*pull_strength = (int)val;
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}
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}
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}
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return bias;
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}
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int
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fdtbus_pinctrl_parse_drive(int phandle)
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{
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int drive = -1;
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if (of_hasprop(phandle, "drive-push-pull"))
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drive = GPIO_PIN_PUSHPULL;
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else if (of_hasprop(phandle, "drive-open-drain"))
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drive = GPIO_PIN_OPENDRAIN;
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else if (of_hasprop(phandle, "drive-open-source"))
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drive = 0;
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return drive;
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}
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int
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fdtbus_pinctrl_parse_drive_strength(int phandle)
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{
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int val;
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/*
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* drive-strength has as an argument the target strength
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* in mA.
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*/
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||||
if (of_getprop_uint32(phandle, "drive-strength", &val) == 0)
|
||||
return val;
|
||||
|
||||
return -1;
|
||||
}
|
||||
int fdtbus_pinctrl_parse_input_output(int phandle, int *output_value)
|
||||
{
|
||||
int direction = -1;
|
||||
int pinval = -1;
|
||||
|
||||
if (of_hasprop(phandle, "input-enable")) {
|
||||
direction = GPIO_PIN_INPUT;
|
||||
} else if (of_hasprop(phandle, "input-disable")) {
|
||||
/*
|
||||
* XXXJRT How to represent this? This is more than
|
||||
* just "don't set the direction" - it's an active
|
||||
* command that might involve disabling an input
|
||||
* buffer on the pin.
|
||||
*/
|
||||
}
|
||||
|
||||
if (of_hasprop(phandle, "output-enable")) {
|
||||
if (direction == -1)
|
||||
direction = 0;
|
||||
direction |= GPIO_PIN_OUTPUT;
|
||||
} else if (of_hasprop(phandle, "output-disable")) {
|
||||
if (direction == -1)
|
||||
direction = 0;
|
||||
direction |= GPIO_PIN_TRISTATE;
|
||||
}
|
||||
|
||||
if (of_hasprop(phandle, "output-low")) {
|
||||
if (direction == -1)
|
||||
direction = 0;
|
||||
direction |= GPIO_PIN_OUTPUT;
|
||||
pinval = GPIO_PIN_LOW;
|
||||
} else if (of_hasprop(phandle, "output-high")) {
|
||||
if (direction == -1)
|
||||
direction = 0;
|
||||
direction |= GPIO_PIN_OUTPUT;
|
||||
pinval = GPIO_PIN_HIGH;
|
||||
}
|
||||
|
||||
if (output_value)
|
||||
*output_value = pinval;
|
||||
|
||||
/*
|
||||
* XXX input-schmitt-enable
|
||||
* XXX input-schmitt-disable
|
||||
*/
|
||||
|
||||
if (direction != -1
|
||||
&& (direction & (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT))
|
||||
== (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT)) {
|
||||
direction |= GPIO_PIN_INOUT;
|
||||
}
|
||||
|
||||
return direction;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,4 +1,4 @@
|
|||
/* $NetBSD: fdtvar.h,v 1.45 2019/01/19 20:50:48 jmcneill Exp $ */
|
||||
/* $NetBSD: fdtvar.h,v 1.46 2019/01/23 04:21:55 thorpej Exp $ */
|
||||
|
||||
/*-
|
||||
* Copyright (c) 2015 Jared D. McNeill <jmcneill@invisible.ca>
|
||||
|
|
@ -31,6 +31,7 @@
|
|||
|
||||
#include <sys/types.h>
|
||||
#include <sys/bus.h>
|
||||
#include <sys/gpio.h>
|
||||
#include <sys/termios.h>
|
||||
|
||||
#include <dev/i2c/i2cvar.h>
|
||||
|
|
@ -292,6 +293,14 @@ pwm_tag_t fdtbus_pwm_acquire_index(int, const char *, int);
|
|||
void fdtbus_pinctrl_configure(void);
|
||||
int fdtbus_pinctrl_set_config_index(int, u_int);
|
||||
int fdtbus_pinctrl_set_config(int, const char *);
|
||||
const char * fdtbus_pinctrl_parse_function(int);
|
||||
const void * fdtbus_pinctrl_parse_pins(int, int *);
|
||||
const char * fdtbus_pinctrl_parse_groups(int, int *);
|
||||
const u_int * fdtbus_pinctrl_parse_pinmux(int, int *);
|
||||
int fdtbus_pinctrl_parse_bias(int, int *);
|
||||
int fdtbus_pinctrl_parse_drive(int);
|
||||
int fdtbus_pinctrl_parse_drive_strength(int);
|
||||
int fdtbus_pinctrl_parse_input_output(int, int *);
|
||||
struct fdtbus_regulator *fdtbus_regulator_acquire(int, const char *);
|
||||
void fdtbus_regulator_release(struct fdtbus_regulator *);
|
||||
int fdtbus_regulator_enable(struct fdtbus_regulator *);
|
||||
|
|
|
|||
Loading…
Reference in New Issue