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Diffstat (limited to 'target/linux/bmips/patches-5.10/067-v5.13-pinctrl-add-a-pincontrol-driver-for-BCM6368.patch')
-rw-r--r--target/linux/bmips/patches-5.10/067-v5.13-pinctrl-add-a-pincontrol-driver-for-BCM6368.patch576
1 files changed, 576 insertions, 0 deletions
diff --git a/target/linux/bmips/patches-5.10/067-v5.13-pinctrl-add-a-pincontrol-driver-for-BCM6368.patch b/target/linux/bmips/patches-5.10/067-v5.13-pinctrl-add-a-pincontrol-driver-for-BCM6368.patch
new file mode 100644
index 0000000000..3965762407
--- /dev/null
+++ b/target/linux/bmips/patches-5.10/067-v5.13-pinctrl-add-a-pincontrol-driver-for-BCM6368.patch
@@ -0,0 +1,576 @@
+From 50554accf7a79980cd04481e8903073bdb706daf Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari@gmail.com>
+Date: Wed, 24 Mar 2021 09:19:17 +0100
+Subject: [PATCH 16/22] pinctrl: add a pincontrol driver for BCM6368
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Add a pincontrol driver for BCM6368. BCM6368 allows muxing the first 32
+GPIOs onto alternative functions. Not all are documented.
+
+Co-developed-by: Jonas Gorski <jonas.gorski@gmail.com>
+Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
+Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
+Link: https://lore.kernel.org/r/20210324081923.20379-17-noltari@gmail.com
+Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
+---
+ drivers/pinctrl/bcm/Kconfig | 8 +
+ drivers/pinctrl/bcm/Makefile | 1 +
+ drivers/pinctrl/bcm/pinctrl-bcm6368.c | 523 ++++++++++++++++++++++++++
+ 3 files changed, 532 insertions(+)
+ create mode 100644 drivers/pinctrl/bcm/pinctrl-bcm6368.c
+
+--- a/drivers/pinctrl/bcm/Kconfig
++++ b/drivers/pinctrl/bcm/Kconfig
+@@ -60,6 +60,14 @@ config PINCTRL_BCM6362
+ help
+ Say Y here to enable the Broadcom BCM6362 GPIO driver.
+
++config PINCTRL_BCM6368
++ bool "Broadcom BCM6368 GPIO driver"
++ depends on (BMIPS_GENERIC || COMPILE_TEST)
++ select PINCTRL_BCM63XX
++ default BMIPS_GENERIC
++ help
++ Say Y here to enable the Broadcom BCM6368 GPIO driver.
++
+ config PINCTRL_IPROC_GPIO
+ bool "Broadcom iProc GPIO (with PINCONF) driver"
+ depends on OF_GPIO && (ARCH_BCM_IPROC || COMPILE_TEST)
+--- a/drivers/pinctrl/bcm/Makefile
++++ b/drivers/pinctrl/bcm/Makefile
+@@ -7,6 +7,7 @@ obj-$(CONFIG_PINCTRL_BCM63XX) += pinctr
+ obj-$(CONFIG_PINCTRL_BCM6328) += pinctrl-bcm6328.o
+ obj-$(CONFIG_PINCTRL_BCM6358) += pinctrl-bcm6358.o
+ obj-$(CONFIG_PINCTRL_BCM6362) += pinctrl-bcm6362.o
++obj-$(CONFIG_PINCTRL_BCM6368) += pinctrl-bcm6368.o
+ obj-$(CONFIG_PINCTRL_IPROC_GPIO) += pinctrl-iproc-gpio.o
+ obj-$(CONFIG_PINCTRL_CYGNUS_MUX) += pinctrl-cygnus-mux.o
+ obj-$(CONFIG_PINCTRL_NS) += pinctrl-ns.o
+--- /dev/null
++++ b/drivers/pinctrl/bcm/pinctrl-bcm6368.c
+@@ -0,0 +1,523 @@
++// SPDX-License-Identifier: GPL-2.0+
++/*
++ * Driver for BCM6368 GPIO unit (pinctrl + GPIO)
++ *
++ * Copyright (C) 2021 Álvaro Fernández Rojas <noltari@gmail.com>
++ * Copyright (C) 2016 Jonas Gorski <jonas.gorski@gmail.com>
++ */
++
++#include <linux/bits.h>
++#include <linux/gpio/driver.h>
++#include <linux/kernel.h>
++#include <linux/of.h>
++#include <linux/pinctrl/pinmux.h>
++#include <linux/platform_device.h>
++#include <linux/regmap.h>
++
++#include "../pinctrl-utils.h"
++
++#include "pinctrl-bcm63xx.h"
++
++#define BCM6368_NUM_GPIOS 38
++
++#define BCM6368_MODE_REG 0x18
++#define BCM6368_BASEMODE_REG 0x38
++#define BCM6368_BASEMODE_MASK 0x7
++#define BCM6368_BASEMODE_GPIO 0x0
++#define BCM6368_BASEMODE_UART1 0x1
++
++struct bcm6368_pingroup {
++ const char *name;
++ const unsigned * const pins;
++ const unsigned num_pins;
++};
++
++struct bcm6368_function {
++ const char *name;
++ const char * const *groups;
++ const unsigned num_groups;
++
++ unsigned dir_out:16;
++ unsigned basemode:3;
++};
++
++struct bcm6368_priv {
++ struct regmap_field *overlays;
++};
++
++#define BCM6368_BASEMODE_PIN(a, b) \
++ { \
++ .number = a, \
++ .name = b, \
++ .drv_data = (void *)true \
++ }
++
++static const struct pinctrl_pin_desc bcm6368_pins[] = {
++ PINCTRL_PIN(0, "gpio0"),
++ PINCTRL_PIN(1, "gpio1"),
++ PINCTRL_PIN(2, "gpio2"),
++ PINCTRL_PIN(3, "gpio3"),
++ PINCTRL_PIN(4, "gpio4"),
++ PINCTRL_PIN(5, "gpio5"),
++ PINCTRL_PIN(6, "gpio6"),
++ PINCTRL_PIN(7, "gpio7"),
++ PINCTRL_PIN(8, "gpio8"),
++ PINCTRL_PIN(9, "gpio9"),
++ PINCTRL_PIN(10, "gpio10"),
++ PINCTRL_PIN(11, "gpio11"),
++ PINCTRL_PIN(12, "gpio12"),
++ PINCTRL_PIN(13, "gpio13"),
++ PINCTRL_PIN(14, "gpio14"),
++ PINCTRL_PIN(15, "gpio15"),
++ PINCTRL_PIN(16, "gpio16"),
++ PINCTRL_PIN(17, "gpio17"),
++ PINCTRL_PIN(18, "gpio18"),
++ PINCTRL_PIN(19, "gpio19"),
++ PINCTRL_PIN(20, "gpio20"),
++ PINCTRL_PIN(21, "gpio21"),
++ PINCTRL_PIN(22, "gpio22"),
++ PINCTRL_PIN(23, "gpio23"),
++ PINCTRL_PIN(24, "gpio24"),
++ PINCTRL_PIN(25, "gpio25"),
++ PINCTRL_PIN(26, "gpio26"),
++ PINCTRL_PIN(27, "gpio27"),
++ PINCTRL_PIN(28, "gpio28"),
++ PINCTRL_PIN(29, "gpio29"),
++ BCM6368_BASEMODE_PIN(30, "gpio30"),
++ BCM6368_BASEMODE_PIN(31, "gpio31"),
++ BCM6368_BASEMODE_PIN(32, "gpio32"),
++ BCM6368_BASEMODE_PIN(33, "gpio33"),
++ PINCTRL_PIN(34, "gpio34"),
++ PINCTRL_PIN(35, "gpio35"),
++ PINCTRL_PIN(36, "gpio36"),
++ PINCTRL_PIN(37, "gpio37"),
++};
++
++static unsigned gpio0_pins[] = { 0 };
++static unsigned gpio1_pins[] = { 1 };
++static unsigned gpio2_pins[] = { 2 };
++static unsigned gpio3_pins[] = { 3 };
++static unsigned gpio4_pins[] = { 4 };
++static unsigned gpio5_pins[] = { 5 };
++static unsigned gpio6_pins[] = { 6 };
++static unsigned gpio7_pins[] = { 7 };
++static unsigned gpio8_pins[] = { 8 };
++static unsigned gpio9_pins[] = { 9 };
++static unsigned gpio10_pins[] = { 10 };
++static unsigned gpio11_pins[] = { 11 };
++static unsigned gpio12_pins[] = { 12 };
++static unsigned gpio13_pins[] = { 13 };
++static unsigned gpio14_pins[] = { 14 };
++static unsigned gpio15_pins[] = { 15 };
++static unsigned gpio16_pins[] = { 16 };
++static unsigned gpio17_pins[] = { 17 };
++static unsigned gpio18_pins[] = { 18 };
++static unsigned gpio19_pins[] = { 19 };
++static unsigned gpio20_pins[] = { 20 };
++static unsigned gpio21_pins[] = { 21 };
++static unsigned gpio22_pins[] = { 22 };
++static unsigned gpio23_pins[] = { 23 };
++static unsigned gpio24_pins[] = { 24 };
++static unsigned gpio25_pins[] = { 25 };
++static unsigned gpio26_pins[] = { 26 };
++static unsigned gpio27_pins[] = { 27 };
++static unsigned gpio28_pins[] = { 28 };
++static unsigned gpio29_pins[] = { 29 };
++static unsigned gpio30_pins[] = { 30 };
++static unsigned gpio31_pins[] = { 31 };
++static unsigned uart1_grp_pins[] = { 30, 31, 32, 33 };
++
++#define BCM6368_GROUP(n) \
++ { \
++ .name = #n, \
++ .pins = n##_pins, \
++ .num_pins = ARRAY_SIZE(n##_pins), \
++ }
++
++static struct bcm6368_pingroup bcm6368_groups[] = {
++ BCM6368_GROUP(gpio0),
++ BCM6368_GROUP(gpio1),
++ BCM6368_GROUP(gpio2),
++ BCM6368_GROUP(gpio3),
++ BCM6368_GROUP(gpio4),
++ BCM6368_GROUP(gpio5),
++ BCM6368_GROUP(gpio6),
++ BCM6368_GROUP(gpio7),
++ BCM6368_GROUP(gpio8),
++ BCM6368_GROUP(gpio9),
++ BCM6368_GROUP(gpio10),
++ BCM6368_GROUP(gpio11),
++ BCM6368_GROUP(gpio12),
++ BCM6368_GROUP(gpio13),
++ BCM6368_GROUP(gpio14),
++ BCM6368_GROUP(gpio15),
++ BCM6368_GROUP(gpio16),
++ BCM6368_GROUP(gpio17),
++ BCM6368_GROUP(gpio18),
++ BCM6368_GROUP(gpio19),
++ BCM6368_GROUP(gpio20),
++ BCM6368_GROUP(gpio21),
++ BCM6368_GROUP(gpio22),
++ BCM6368_GROUP(gpio23),
++ BCM6368_GROUP(gpio24),
++ BCM6368_GROUP(gpio25),
++ BCM6368_GROUP(gpio26),
++ BCM6368_GROUP(gpio27),
++ BCM6368_GROUP(gpio28),
++ BCM6368_GROUP(gpio29),
++ BCM6368_GROUP(gpio30),
++ BCM6368_GROUP(gpio31),
++ BCM6368_GROUP(uart1_grp),
++};
++
++static const char * const analog_afe_0_groups[] = {
++ "gpio0",
++};
++
++static const char * const analog_afe_1_groups[] = {
++ "gpio1",
++};
++
++static const char * const sys_irq_groups[] = {
++ "gpio2",
++};
++
++static const char * const serial_led_data_groups[] = {
++ "gpio3",
++};
++
++static const char * const serial_led_clk_groups[] = {
++ "gpio4",
++};
++
++static const char * const inet_led_groups[] = {
++ "gpio5",
++};
++
++static const char * const ephy0_led_groups[] = {
++ "gpio6",
++};
++
++static const char * const ephy1_led_groups[] = {
++ "gpio7",
++};
++
++static const char * const ephy2_led_groups[] = {
++ "gpio8",
++};
++
++static const char * const ephy3_led_groups[] = {
++ "gpio9",
++};
++
++static const char * const robosw_led_data_groups[] = {
++ "gpio10",
++};
++
++static const char * const robosw_led_clk_groups[] = {
++ "gpio11",
++};
++
++static const char * const robosw_led0_groups[] = {
++ "gpio12",
++};
++
++static const char * const robosw_led1_groups[] = {
++ "gpio13",
++};
++
++static const char * const usb_device_led_groups[] = {
++ "gpio14",
++};
++
++static const char * const pci_req1_groups[] = {
++ "gpio16",
++};
++
++static const char * const pci_gnt1_groups[] = {
++ "gpio17",
++};
++
++static const char * const pci_intb_groups[] = {
++ "gpio18",
++};
++
++static const char * const pci_req0_groups[] = {
++ "gpio19",
++};
++
++static const char * const pci_gnt0_groups[] = {
++ "gpio20",
++};
++
++static const char * const pcmcia_cd1_groups[] = {
++ "gpio22",
++};
++
++static const char * const pcmcia_cd2_groups[] = {
++ "gpio23",
++};
++
++static const char * const pcmcia_vs1_groups[] = {
++ "gpio24",
++};
++
++static const char * const pcmcia_vs2_groups[] = {
++ "gpio25",
++};
++
++static const char * const ebi_cs2_groups[] = {
++ "gpio26",
++};
++
++static const char * const ebi_cs3_groups[] = {
++ "gpio27",
++};
++
++static const char * const spi_cs2_groups[] = {
++ "gpio28",
++};
++
++static const char * const spi_cs3_groups[] = {
++ "gpio29",
++};
++
++static const char * const spi_cs4_groups[] = {
++ "gpio30",
++};
++
++static const char * const spi_cs5_groups[] = {
++ "gpio31",
++};
++
++static const char * const uart1_groups[] = {
++ "uart1_grp",
++};
++
++#define BCM6368_FUN(n, out) \
++ { \
++ .name = #n, \
++ .groups = n##_groups, \
++ .num_groups = ARRAY_SIZE(n##_groups), \
++ .dir_out = out, \
++ }
++
++#define BCM6368_BASEMODE_FUN(n, val, out) \
++ { \
++ .name = #n, \
++ .groups = n##_groups, \
++ .num_groups = ARRAY_SIZE(n##_groups), \
++ .basemode = BCM6368_BASEMODE_##val, \
++ .dir_out = out, \
++ }
++
++static const struct bcm6368_function bcm6368_funcs[] = {
++ BCM6368_FUN(analog_afe_0, 1),
++ BCM6368_FUN(analog_afe_1, 1),
++ BCM6368_FUN(sys_irq, 1),
++ BCM6368_FUN(serial_led_data, 1),
++ BCM6368_FUN(serial_led_clk, 1),
++ BCM6368_FUN(inet_led, 1),
++ BCM6368_FUN(ephy0_led, 1),
++ BCM6368_FUN(ephy1_led, 1),
++ BCM6368_FUN(ephy2_led, 1),
++ BCM6368_FUN(ephy3_led, 1),
++ BCM6368_FUN(robosw_led_data, 1),
++ BCM6368_FUN(robosw_led_clk, 1),
++ BCM6368_FUN(robosw_led0, 1),
++ BCM6368_FUN(robosw_led1, 1),
++ BCM6368_FUN(usb_device_led, 1),
++ BCM6368_FUN(pci_req1, 0),
++ BCM6368_FUN(pci_gnt1, 0),
++ BCM6368_FUN(pci_intb, 0),
++ BCM6368_FUN(pci_req0, 0),
++ BCM6368_FUN(pci_gnt0, 0),
++ BCM6368_FUN(pcmcia_cd1, 0),
++ BCM6368_FUN(pcmcia_cd2, 0),
++ BCM6368_FUN(pcmcia_vs1, 0),
++ BCM6368_FUN(pcmcia_vs2, 0),
++ BCM6368_FUN(ebi_cs2, 1),
++ BCM6368_FUN(ebi_cs3, 1),
++ BCM6368_FUN(spi_cs2, 1),
++ BCM6368_FUN(spi_cs3, 1),
++ BCM6368_FUN(spi_cs4, 1),
++ BCM6368_FUN(spi_cs5, 1),
++ BCM6368_BASEMODE_FUN(uart1, UART1, 0x6),
++};
++
++static int bcm6368_pinctrl_get_group_count(struct pinctrl_dev *pctldev)
++{
++ return ARRAY_SIZE(bcm6368_groups);
++}
++
++static const char *bcm6368_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
++ unsigned group)
++{
++ return bcm6368_groups[group].name;
++}
++
++static int bcm6368_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
++ unsigned group, const unsigned **pins,
++ unsigned *num_pins)
++{
++ *pins = bcm6368_groups[group].pins;
++ *num_pins = bcm6368_groups[group].num_pins;
++
++ return 0;
++}
++
++static int bcm6368_pinctrl_get_func_count(struct pinctrl_dev *pctldev)
++{
++ return ARRAY_SIZE(bcm6368_funcs);
++}
++
++static const char *bcm6368_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
++ unsigned selector)
++{
++ return bcm6368_funcs[selector].name;
++}
++
++static int bcm6368_pinctrl_get_groups(struct pinctrl_dev *pctldev,
++ unsigned selector,
++ const char * const **groups,
++ unsigned * const num_groups)
++{
++ *groups = bcm6368_funcs[selector].groups;
++ *num_groups = bcm6368_funcs[selector].num_groups;
++
++ return 0;
++}
++
++static int bcm6368_pinctrl_set_mux(struct pinctrl_dev *pctldev,
++ unsigned selector, unsigned group)
++{
++ struct bcm63xx_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
++ struct bcm6368_priv *priv = pc->driver_data;
++ const struct bcm6368_pingroup *pg = &bcm6368_groups[group];
++ const struct bcm6368_function *fun = &bcm6368_funcs[selector];
++ int i, pin;
++
++ if (fun->basemode) {
++ unsigned int mask = 0;
++
++ for (i = 0; i < pg->num_pins; i++) {
++ pin = pg->pins[i];
++ if (pin < BCM63XX_BANK_GPIOS)
++ mask |= BIT(pin);
++ }
++
++ regmap_update_bits(pc->regs, BCM6368_MODE_REG, mask, 0);
++ regmap_field_write(priv->overlays, fun->basemode);
++ } else {
++ pin = pg->pins[0];
++
++ if (bcm6368_pins[pin].drv_data)
++ regmap_field_write(priv->overlays,
++ BCM6368_BASEMODE_GPIO);
++
++ regmap_update_bits(pc->regs, BCM6368_MODE_REG, BIT(pin),
++ BIT(pin));
++ }
++
++ for (pin = 0; pin < pg->num_pins; pin++) {
++ struct pinctrl_gpio_range *range;
++ int hw_gpio = bcm6368_pins[pin].number;
++
++ range = pinctrl_find_gpio_range_from_pin(pctldev, hw_gpio);
++ if (range) {
++ struct gpio_chip *gc = range->gc;
++
++ if (fun->dir_out & BIT(pin))
++ gc->direction_output(gc, hw_gpio, 0);
++ else
++ gc->direction_input(gc, hw_gpio);
++ }
++ }
++
++ return 0;
++}
++
++static int bcm6368_gpio_request_enable(struct pinctrl_dev *pctldev,
++ struct pinctrl_gpio_range *range,
++ unsigned offset)
++{
++ struct bcm63xx_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
++ struct bcm6368_priv *priv = pc->driver_data;
++
++ if (offset >= BCM63XX_BANK_GPIOS && !bcm6368_pins[offset].drv_data)
++ return 0;
++
++ /* disable all functions using this pin */
++ if (offset < BCM63XX_BANK_GPIOS)
++ regmap_update_bits(pc->regs, BCM6368_MODE_REG, BIT(offset), 0);
++
++ if (bcm6368_pins[offset].drv_data)
++ regmap_field_write(priv->overlays, BCM6368_BASEMODE_GPIO);
++
++ return 0;
++}
++
++static struct pinctrl_ops bcm6368_pctl_ops = {
++ .dt_free_map = pinctrl_utils_free_map,
++ .dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
++ .get_group_name = bcm6368_pinctrl_get_group_name,
++ .get_group_pins = bcm6368_pinctrl_get_group_pins,
++ .get_groups_count = bcm6368_pinctrl_get_group_count,
++};
++
++static struct pinmux_ops bcm6368_pmx_ops = {
++ .get_function_groups = bcm6368_pinctrl_get_groups,
++ .get_function_name = bcm6368_pinctrl_get_func_name,
++ .get_functions_count = bcm6368_pinctrl_get_func_count,
++ .gpio_request_enable = bcm6368_gpio_request_enable,
++ .set_mux = bcm6368_pinctrl_set_mux,
++ .strict = true,
++};
++
++static const struct bcm63xx_pinctrl_soc bcm6368_soc = {
++ .ngpios = BCM6368_NUM_GPIOS,
++ .npins = ARRAY_SIZE(bcm6368_pins),
++ .pctl_ops = &bcm6368_pctl_ops,
++ .pins = bcm6368_pins,
++ .pmx_ops = &bcm6368_pmx_ops,
++};
++
++static int bcm6368_pinctrl_probe(struct platform_device *pdev)
++{
++ struct reg_field overlays = REG_FIELD(BCM6368_BASEMODE_REG, 0, 15);
++ struct device *dev = &pdev->dev;
++ struct bcm63xx_pinctrl *pc;
++ struct bcm6368_priv *priv;
++ int err;
++
++ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
++ if (!priv)
++ return -ENOMEM;
++
++ err = bcm63xx_pinctrl_probe(pdev, &bcm6368_soc, (void *) priv);
++ if (err)
++ return err;
++
++ pc = platform_get_drvdata(pdev);
++
++ priv->overlays = devm_regmap_field_alloc(dev, pc->regs, overlays);
++ if (IS_ERR(priv->overlays))
++ return PTR_ERR(priv->overlays);
++
++ return 0;
++}
++
++static const struct of_device_id bcm6368_pinctrl_match[] = {
++ { .compatible = "brcm,bcm6368-pinctrl", },
++ { /* sentinel */ }
++};
++
++static struct platform_driver bcm6368_pinctrl_driver = {
++ .probe = bcm6368_pinctrl_probe,
++ .driver = {
++ .name = "bcm6368-pinctrl",
++ .of_match_table = bcm6368_pinctrl_match,
++ },
++};
++
++builtin_platform_driver(bcm6368_pinctrl_driver);
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