pinctrl: add a pincontrol driver for BCM6362
Add a pincotrol driver for BCM6362. BCM6362 allows muxing individual GPIO pins to the LED controller, to be available by the integrated wifi, or other functions. It also supports overlay groups, of which only NAND is 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/20210324081923.20379-14-noltari@gmail.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Álvaro Fernández Rojas
Linus Walleij
Родитель
7ca989eafb
Коммит
705791e23e
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@ -52,6 +52,14 @@ config PINCTRL_BCM6358
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help
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Say Y here to enable the Broadcom BCM6358 GPIO driver.
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config PINCTRL_BCM6362
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bool "Broadcom BCM6362 GPIO driver"
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depends on (BMIPS_GENERIC || COMPILE_TEST)
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select PINCTRL_BCM63XX
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default BMIPS_GENERIC
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help
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Say Y here to enable the Broadcom BCM6362 GPIO driver.
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config PINCTRL_IPROC_GPIO
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bool "Broadcom iProc GPIO (with PINCONF) driver"
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depends on OF_GPIO && (ARCH_BCM_IPROC || COMPILE_TEST)
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@ -6,6 +6,7 @@ obj-$(CONFIG_PINCTRL_BCM2835) += pinctrl-bcm2835.o
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obj-$(CONFIG_PINCTRL_BCM63XX) += pinctrl-bcm63xx.o
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obj-$(CONFIG_PINCTRL_BCM6328) += pinctrl-bcm6328.o
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obj-$(CONFIG_PINCTRL_BCM6358) += pinctrl-bcm6358.o
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obj-$(CONFIG_PINCTRL_BCM6362) += pinctrl-bcm6362.o
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obj-$(CONFIG_PINCTRL_IPROC_GPIO) += pinctrl-iproc-gpio.o
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obj-$(CONFIG_PINCTRL_CYGNUS_MUX) += pinctrl-cygnus-mux.o
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obj-$(CONFIG_PINCTRL_NS) += pinctrl-ns.o
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@ -0,0 +1,617 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Driver for BCM6362 GPIO unit (pinctrl + GPIO)
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*
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* Copyright (C) 2021 Álvaro Fernández Rojas <noltari@gmail.com>
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* Copyright (C) 2016 Jonas Gorski <jonas.gorski@gmail.com>
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*/
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#include <linux/bits.h>
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#include <linux/gpio/driver.h>
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#include <linux/kernel.h>
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#include <linux/of.h>
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#include <linux/pinctrl/pinmux.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include "../pinctrl-utils.h"
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#include "pinctrl-bcm63xx.h"
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#define BCM6362_BANK_GPIOS 32
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#define BCM6362_NUM_GPIOS 48
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#define BCM6362_NUM_LEDS 24
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#define BCM6362_LED_REG 0x10
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#define BCM6362_MODE_REG 0x18
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#define BCM6362_CTRL_REG 0x1c
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#define BCM6362_BASEMODE_REG 0x38
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#define BASEMODE_NAND BIT(2)
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enum bcm6362_pinctrl_reg {
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BCM6362_LEDCTRL,
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BCM6362_MODE,
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BCM6362_CTRL,
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BCM6362_BASEMODE,
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};
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struct bcm6362_pingroup {
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const char *name;
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const unsigned * const pins;
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const unsigned num_pins;
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};
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struct bcm6362_function {
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const char *name;
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const char * const *groups;
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const unsigned num_groups;
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enum bcm6362_pinctrl_reg reg;
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uint32_t basemode_mask;
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};
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#define BCM6362_PIN(a, b, mask) \
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{ \
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.number = a, \
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.name = b, \
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.drv_data = (void *)(mask), \
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}
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static const struct pinctrl_pin_desc bcm6362_pins[] = {
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PINCTRL_PIN(0, "gpio0"),
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PINCTRL_PIN(1, "gpio1"),
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PINCTRL_PIN(2, "gpio2"),
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PINCTRL_PIN(3, "gpio3"),
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PINCTRL_PIN(4, "gpio4"),
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PINCTRL_PIN(5, "gpio5"),
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PINCTRL_PIN(6, "gpio6"),
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PINCTRL_PIN(7, "gpio7"),
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BCM6362_PIN(8, "gpio8", BASEMODE_NAND),
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PINCTRL_PIN(9, "gpio9"),
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PINCTRL_PIN(10, "gpio10"),
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PINCTRL_PIN(11, "gpio11"),
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BCM6362_PIN(12, "gpio12", BASEMODE_NAND),
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BCM6362_PIN(13, "gpio13", BASEMODE_NAND),
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BCM6362_PIN(14, "gpio14", BASEMODE_NAND),
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BCM6362_PIN(15, "gpio15", BASEMODE_NAND),
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BCM6362_PIN(16, "gpio16", BASEMODE_NAND),
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BCM6362_PIN(17, "gpio17", BASEMODE_NAND),
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BCM6362_PIN(18, "gpio18", BASEMODE_NAND),
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BCM6362_PIN(19, "gpio19", BASEMODE_NAND),
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BCM6362_PIN(20, "gpio20", BASEMODE_NAND),
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BCM6362_PIN(21, "gpio21", BASEMODE_NAND),
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BCM6362_PIN(22, "gpio22", BASEMODE_NAND),
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BCM6362_PIN(23, "gpio23", BASEMODE_NAND),
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PINCTRL_PIN(24, "gpio24"),
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PINCTRL_PIN(25, "gpio25"),
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PINCTRL_PIN(26, "gpio26"),
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BCM6362_PIN(27, "gpio27", BASEMODE_NAND),
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PINCTRL_PIN(28, "gpio28"),
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PINCTRL_PIN(29, "gpio29"),
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PINCTRL_PIN(30, "gpio30"),
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PINCTRL_PIN(31, "gpio31"),
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PINCTRL_PIN(32, "gpio32"),
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PINCTRL_PIN(33, "gpio33"),
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PINCTRL_PIN(34, "gpio34"),
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PINCTRL_PIN(35, "gpio35"),
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PINCTRL_PIN(36, "gpio36"),
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PINCTRL_PIN(37, "gpio37"),
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PINCTRL_PIN(38, "gpio38"),
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PINCTRL_PIN(39, "gpio39"),
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PINCTRL_PIN(40, "gpio40"),
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PINCTRL_PIN(41, "gpio41"),
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PINCTRL_PIN(42, "gpio42"),
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PINCTRL_PIN(43, "gpio43"),
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PINCTRL_PIN(44, "gpio44"),
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PINCTRL_PIN(45, "gpio45"),
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PINCTRL_PIN(46, "gpio46"),
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PINCTRL_PIN(47, "gpio47"),
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};
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static unsigned gpio0_pins[] = { 0 };
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static unsigned gpio1_pins[] = { 1 };
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static unsigned gpio2_pins[] = { 2 };
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static unsigned gpio3_pins[] = { 3 };
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static unsigned gpio4_pins[] = { 4 };
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static unsigned gpio5_pins[] = { 5 };
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static unsigned gpio6_pins[] = { 6 };
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static unsigned gpio7_pins[] = { 7 };
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static unsigned gpio8_pins[] = { 8 };
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static unsigned gpio9_pins[] = { 9 };
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static unsigned gpio10_pins[] = { 10 };
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static unsigned gpio11_pins[] = { 11 };
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static unsigned gpio12_pins[] = { 12 };
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static unsigned gpio13_pins[] = { 13 };
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static unsigned gpio14_pins[] = { 14 };
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static unsigned gpio15_pins[] = { 15 };
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static unsigned gpio16_pins[] = { 16 };
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static unsigned gpio17_pins[] = { 17 };
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static unsigned gpio18_pins[] = { 18 };
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static unsigned gpio19_pins[] = { 19 };
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static unsigned gpio20_pins[] = { 20 };
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static unsigned gpio21_pins[] = { 21 };
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static unsigned gpio22_pins[] = { 22 };
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static unsigned gpio23_pins[] = { 23 };
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static unsigned gpio24_pins[] = { 24 };
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static unsigned gpio25_pins[] = { 25 };
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static unsigned gpio26_pins[] = { 26 };
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static unsigned gpio27_pins[] = { 27 };
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static unsigned gpio28_pins[] = { 28 };
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static unsigned gpio29_pins[] = { 29 };
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static unsigned gpio30_pins[] = { 30 };
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static unsigned gpio31_pins[] = { 31 };
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static unsigned gpio32_pins[] = { 32 };
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static unsigned gpio33_pins[] = { 33 };
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static unsigned gpio34_pins[] = { 34 };
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static unsigned gpio35_pins[] = { 35 };
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static unsigned gpio36_pins[] = { 36 };
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static unsigned gpio37_pins[] = { 37 };
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static unsigned gpio38_pins[] = { 38 };
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static unsigned gpio39_pins[] = { 39 };
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static unsigned gpio40_pins[] = { 40 };
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static unsigned gpio41_pins[] = { 41 };
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static unsigned gpio42_pins[] = { 42 };
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static unsigned gpio43_pins[] = { 43 };
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static unsigned gpio44_pins[] = { 44 };
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static unsigned gpio45_pins[] = { 45 };
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static unsigned gpio46_pins[] = { 46 };
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static unsigned gpio47_pins[] = { 47 };
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static unsigned nand_grp_pins[] = {
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8, 12, 13, 14, 15, 16, 17,
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18, 19, 20, 21, 22, 23, 27,
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};
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#define BCM6362_GROUP(n) \
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{ \
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.name = #n, \
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.pins = n##_pins, \
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.num_pins = ARRAY_SIZE(n##_pins), \
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}
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static struct bcm6362_pingroup bcm6362_groups[] = {
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BCM6362_GROUP(gpio0),
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BCM6362_GROUP(gpio1),
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BCM6362_GROUP(gpio2),
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BCM6362_GROUP(gpio3),
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BCM6362_GROUP(gpio4),
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BCM6362_GROUP(gpio5),
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BCM6362_GROUP(gpio6),
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BCM6362_GROUP(gpio7),
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BCM6362_GROUP(gpio8),
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BCM6362_GROUP(gpio9),
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BCM6362_GROUP(gpio10),
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BCM6362_GROUP(gpio11),
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BCM6362_GROUP(gpio12),
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BCM6362_GROUP(gpio13),
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BCM6362_GROUP(gpio14),
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BCM6362_GROUP(gpio15),
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BCM6362_GROUP(gpio16),
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BCM6362_GROUP(gpio17),
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BCM6362_GROUP(gpio18),
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BCM6362_GROUP(gpio19),
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BCM6362_GROUP(gpio20),
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BCM6362_GROUP(gpio21),
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BCM6362_GROUP(gpio22),
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BCM6362_GROUP(gpio23),
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BCM6362_GROUP(gpio24),
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BCM6362_GROUP(gpio25),
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BCM6362_GROUP(gpio26),
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BCM6362_GROUP(gpio27),
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BCM6362_GROUP(gpio28),
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BCM6362_GROUP(gpio29),
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BCM6362_GROUP(gpio30),
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BCM6362_GROUP(gpio31),
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BCM6362_GROUP(gpio32),
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BCM6362_GROUP(gpio33),
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BCM6362_GROUP(gpio34),
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BCM6362_GROUP(gpio35),
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BCM6362_GROUP(gpio36),
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BCM6362_GROUP(gpio37),
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BCM6362_GROUP(gpio38),
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BCM6362_GROUP(gpio39),
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BCM6362_GROUP(gpio40),
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BCM6362_GROUP(gpio41),
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BCM6362_GROUP(gpio42),
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BCM6362_GROUP(gpio43),
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BCM6362_GROUP(gpio44),
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BCM6362_GROUP(gpio45),
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BCM6362_GROUP(gpio46),
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BCM6362_GROUP(gpio47),
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BCM6362_GROUP(nand_grp),
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};
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static const char * const led_groups[] = {
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"gpio0",
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"gpio1",
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"gpio2",
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"gpio3",
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"gpio4",
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"gpio5",
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"gpio6",
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"gpio7",
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"gpio8",
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"gpio9",
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"gpio10",
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"gpio11",
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"gpio12",
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"gpio13",
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"gpio14",
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"gpio15",
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"gpio16",
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"gpio17",
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"gpio18",
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"gpio19",
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"gpio20",
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"gpio21",
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"gpio22",
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"gpio23",
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};
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static const char * const usb_device_led_groups[] = {
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"gpio0",
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};
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static const char * const sys_irq_groups[] = {
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"gpio1",
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};
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static const char * const serial_led_clk_groups[] = {
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"gpio2",
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};
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static const char * const serial_led_data_groups[] = {
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"gpio3",
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};
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static const char * const robosw_led_data_groups[] = {
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"gpio4",
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};
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static const char * const robosw_led_clk_groups[] = {
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"gpio5",
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};
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static const char * const robosw_led0_groups[] = {
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"gpio6",
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};
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static const char * const robosw_led1_groups[] = {
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"gpio7",
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};
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static const char * const inet_led_groups[] = {
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"gpio8",
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};
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static const char * const spi_cs2_groups[] = {
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"gpio9",
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};
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static const char * const spi_cs3_groups[] = {
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"gpio10",
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};
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static const char * const ntr_pulse_groups[] = {
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"gpio11",
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};
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static const char * const uart1_scts_groups[] = {
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"gpio12",
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};
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static const char * const uart1_srts_groups[] = {
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"gpio13",
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};
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static const char * const uart1_sdin_groups[] = {
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"gpio14",
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};
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static const char * const uart1_sdout_groups[] = {
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"gpio15",
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};
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static const char * const adsl_spi_miso_groups[] = {
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"gpio16",
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};
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static const char * const adsl_spi_mosi_groups[] = {
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"gpio17",
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};
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static const char * const adsl_spi_clk_groups[] = {
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"gpio18",
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};
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static const char * const adsl_spi_cs_groups[] = {
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"gpio19",
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};
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static const char * const ephy0_led_groups[] = {
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"gpio20",
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};
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static const char * const ephy1_led_groups[] = {
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"gpio21",
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};
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static const char * const ephy2_led_groups[] = {
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"gpio22",
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};
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static const char * const ephy3_led_groups[] = {
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"gpio23",
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};
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static const char * const ext_irq0_groups[] = {
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"gpio24",
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};
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static const char * const ext_irq1_groups[] = {
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"gpio25",
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};
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static const char * const ext_irq2_groups[] = {
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"gpio26",
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};
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static const char * const ext_irq3_groups[] = {
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"gpio27",
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};
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static const char * const wifi_groups[] = {
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"gpio32",
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"gpio33",
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"gpio34",
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"gpio35",
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"gpio36",
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"gpio37",
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"gpio38",
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"gpio39",
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"gpio40",
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"gpio41",
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"gpio42",
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"gpio43",
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"gpio44",
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"gpio45",
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"gpio46",
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"gpio47",
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};
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static const char * const nand_groups[] = {
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"nand_grp",
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};
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#define BCM6362_LED_FUN(n) \
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{ \
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.name = #n, \
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.groups = n##_groups, \
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.num_groups = ARRAY_SIZE(n##_groups), \
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.reg = BCM6362_LEDCTRL, \
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}
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#define BCM6362_MODE_FUN(n) \
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{ \
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.name = #n, \
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.groups = n##_groups, \
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.num_groups = ARRAY_SIZE(n##_groups), \
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.reg = BCM6362_MODE, \
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}
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#define BCM6362_CTRL_FUN(n) \
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{ \
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.name = #n, \
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.groups = n##_groups, \
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.num_groups = ARRAY_SIZE(n##_groups), \
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.reg = BCM6362_CTRL, \
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}
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#define BCM6362_BASEMODE_FUN(n, mask) \
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{ \
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.name = #n, \
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.groups = n##_groups, \
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.num_groups = ARRAY_SIZE(n##_groups), \
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.reg = BCM6362_BASEMODE, \
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.basemode_mask = (mask), \
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}
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static const struct bcm6362_function bcm6362_funcs[] = {
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BCM6362_LED_FUN(led),
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BCM6362_MODE_FUN(usb_device_led),
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BCM6362_MODE_FUN(sys_irq),
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BCM6362_MODE_FUN(serial_led_clk),
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BCM6362_MODE_FUN(serial_led_data),
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BCM6362_MODE_FUN(robosw_led_data),
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BCM6362_MODE_FUN(robosw_led_clk),
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||||
BCM6362_MODE_FUN(robosw_led0),
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||||
BCM6362_MODE_FUN(robosw_led1),
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||||
BCM6362_MODE_FUN(inet_led),
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||||
BCM6362_MODE_FUN(spi_cs2),
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||||
BCM6362_MODE_FUN(spi_cs3),
|
||||
BCM6362_MODE_FUN(ntr_pulse),
|
||||
BCM6362_MODE_FUN(uart1_scts),
|
||||
BCM6362_MODE_FUN(uart1_srts),
|
||||
BCM6362_MODE_FUN(uart1_sdin),
|
||||
BCM6362_MODE_FUN(uart1_sdout),
|
||||
BCM6362_MODE_FUN(adsl_spi_miso),
|
||||
BCM6362_MODE_FUN(adsl_spi_mosi),
|
||||
BCM6362_MODE_FUN(adsl_spi_clk),
|
||||
BCM6362_MODE_FUN(adsl_spi_cs),
|
||||
BCM6362_MODE_FUN(ephy0_led),
|
||||
BCM6362_MODE_FUN(ephy1_led),
|
||||
BCM6362_MODE_FUN(ephy2_led),
|
||||
BCM6362_MODE_FUN(ephy3_led),
|
||||
BCM6362_MODE_FUN(ext_irq0),
|
||||
BCM6362_MODE_FUN(ext_irq1),
|
||||
BCM6362_MODE_FUN(ext_irq2),
|
||||
BCM6362_MODE_FUN(ext_irq3),
|
||||
BCM6362_CTRL_FUN(wifi),
|
||||
BCM6362_BASEMODE_FUN(nand, BASEMODE_NAND),
|
||||
};
|
||||
|
||||
static int bcm6362_pinctrl_get_group_count(struct pinctrl_dev *pctldev)
|
||||
{
|
||||
return ARRAY_SIZE(bcm6362_groups);
|
||||
}
|
||||
|
||||
static const char *bcm6362_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
|
||||
unsigned group)
|
||||
{
|
||||
return bcm6362_groups[group].name;
|
||||
}
|
||||
|
||||
static int bcm6362_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
|
||||
unsigned group, const unsigned **pins,
|
||||
unsigned *num_pins)
|
||||
{
|
||||
*pins = bcm6362_groups[group].pins;
|
||||
*num_pins = bcm6362_groups[group].num_pins;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int bcm6362_pinctrl_get_func_count(struct pinctrl_dev *pctldev)
|
||||
{
|
||||
return ARRAY_SIZE(bcm6362_funcs);
|
||||
}
|
||||
|
||||
static const char *bcm6362_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
|
||||
unsigned selector)
|
||||
{
|
||||
return bcm6362_funcs[selector].name;
|
||||
}
|
||||
|
||||
static int bcm6362_pinctrl_get_groups(struct pinctrl_dev *pctldev,
|
||||
unsigned selector,
|
||||
const char * const **groups,
|
||||
unsigned * const num_groups)
|
||||
{
|
||||
*groups = bcm6362_funcs[selector].groups;
|
||||
*num_groups = bcm6362_funcs[selector].num_groups;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void bcm6362_set_gpio(struct bcm63xx_pinctrl *pc, unsigned pin)
|
||||
{
|
||||
const struct pinctrl_pin_desc *desc = &bcm6362_pins[pin];
|
||||
unsigned int mask = bcm63xx_bank_pin(pin);
|
||||
|
||||
if (desc->drv_data)
|
||||
regmap_update_bits(pc->regs, BCM6362_BASEMODE_REG,
|
||||
(uint32_t) desc->drv_data, 0);
|
||||
|
||||
if (pin < BCM63XX_BANK_GPIOS) {
|
||||
/* base mode 0 => gpio 1 => mux function */
|
||||
regmap_update_bits(pc->regs, BCM6362_MODE_REG, mask, 0);
|
||||
|
||||
/* pins 0-23 might be muxed to led */
|
||||
if (pin < BCM6362_NUM_LEDS)
|
||||
regmap_update_bits(pc->regs, BCM6362_LED_REG, mask, 0);
|
||||
} else {
|
||||
/* ctrl reg 0 => wifi function 1 => gpio */
|
||||
regmap_update_bits(pc->regs, BCM6362_CTRL_REG, mask, mask);
|
||||
}
|
||||
}
|
||||
|
||||
static int bcm6362_pinctrl_set_mux(struct pinctrl_dev *pctldev,
|
||||
unsigned selector, unsigned group)
|
||||
{
|
||||
struct bcm63xx_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
|
||||
const struct bcm6362_pingroup *pg = &bcm6362_groups[group];
|
||||
const struct bcm6362_function *f = &bcm6362_funcs[selector];
|
||||
unsigned i;
|
||||
unsigned int reg;
|
||||
unsigned int val, mask;
|
||||
|
||||
for (i = 0; i < pg->num_pins; i++)
|
||||
bcm6362_set_gpio(pc, pg->pins[i]);
|
||||
|
||||
switch (f->reg) {
|
||||
case BCM6362_LEDCTRL:
|
||||
reg = BCM6362_LED_REG;
|
||||
mask = BIT(pg->pins[0]);
|
||||
val = BIT(pg->pins[0]);
|
||||
break;
|
||||
case BCM6362_MODE:
|
||||
reg = BCM6362_MODE_REG;
|
||||
mask = BIT(pg->pins[0]);
|
||||
val = BIT(pg->pins[0]);
|
||||
break;
|
||||
case BCM6362_CTRL:
|
||||
reg = BCM6362_CTRL_REG;
|
||||
mask = BIT(pg->pins[0]);
|
||||
val = 0;
|
||||
break;
|
||||
case BCM6362_BASEMODE:
|
||||
reg = BCM6362_BASEMODE_REG;
|
||||
mask = f->basemode_mask;
|
||||
val = f->basemode_mask;
|
||||
break;
|
||||
default:
|
||||
WARN_ON(1);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
regmap_update_bits(pc->regs, reg, mask, val);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int bcm6362_gpio_request_enable(struct pinctrl_dev *pctldev,
|
||||
struct pinctrl_gpio_range *range,
|
||||
unsigned offset)
|
||||
{
|
||||
struct bcm63xx_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
|
||||
|
||||
/* disable all functions using this pin */
|
||||
bcm6362_set_gpio(pc, offset);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct pinctrl_ops bcm6362_pctl_ops = {
|
||||
.dt_free_map = pinctrl_utils_free_map,
|
||||
.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
|
||||
.get_group_name = bcm6362_pinctrl_get_group_name,
|
||||
.get_group_pins = bcm6362_pinctrl_get_group_pins,
|
||||
.get_groups_count = bcm6362_pinctrl_get_group_count,
|
||||
};
|
||||
|
||||
static struct pinmux_ops bcm6362_pmx_ops = {
|
||||
.get_function_groups = bcm6362_pinctrl_get_groups,
|
||||
.get_function_name = bcm6362_pinctrl_get_func_name,
|
||||
.get_functions_count = bcm6362_pinctrl_get_func_count,
|
||||
.gpio_request_enable = bcm6362_gpio_request_enable,
|
||||
.set_mux = bcm6362_pinctrl_set_mux,
|
||||
.strict = true,
|
||||
};
|
||||
|
||||
static const struct bcm63xx_pinctrl_soc bcm6362_soc = {
|
||||
.ngpios = BCM6362_NUM_GPIOS,
|
||||
.npins = ARRAY_SIZE(bcm6362_pins),
|
||||
.pctl_ops = &bcm6362_pctl_ops,
|
||||
.pins = bcm6362_pins,
|
||||
.pmx_ops = &bcm6362_pmx_ops,
|
||||
};
|
||||
|
||||
static int bcm6362_pinctrl_probe(struct platform_device *pdev)
|
||||
{
|
||||
return bcm63xx_pinctrl_probe(pdev, &bcm6362_soc, NULL);
|
||||
}
|
||||
|
||||
static const struct of_device_id bcm6362_pinctrl_match[] = {
|
||||
{ .compatible = "brcm,bcm6362-pinctrl", },
|
||||
{ /* sentinel */ }
|
||||
};
|
||||
|
||||
static struct platform_driver bcm6362_pinctrl_driver = {
|
||||
.probe = bcm6362_pinctrl_probe,
|
||||
.driver = {
|
||||
.name = "bcm6362-pinctrl",
|
||||
.of_match_table = bcm6362_pinctrl_match,
|
||||
},
|
||||
};
|
||||
|
||||
builtin_platform_driver(bcm6362_pinctrl_driver);
|
||||
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