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- From 90be3cb4f1a45b8be4a4ec264cd66c2f8e893fcb Mon Sep 17 00:00:00 2001
- From: Jonas Gorski <[email protected]>
- Date: Fri, 24 Jun 2016 22:18:25 +0200
- Subject: [PATCH 11/16] pinctrl: add a pincontrol driver for BCM6368
- Add a pincontrol driver for BCM6368. BCM6368 allows muxing the first 32
- GPIOs onto alternative functions. Not all are documented.
- Signed-off-by: Jonas Gorski <[email protected]>
- ---
- drivers/pinctrl/bcm63xx/Kconfig | 15 +
- drivers/pinctrl/bcm63xx/Makefile | 1 +
- drivers/pinctrl/bcm63xx/pinctrl-bcm6368.c | 573 ++++++++++++++++++++++++++++++
- 3 files changed, 589 insertions(+)
- create mode 100644 drivers/pinctrl/bcm63xx/pinctrl-bcm6368.c
- --- a/drivers/pinctrl/bcm63xx/Kconfig
- +++ b/drivers/pinctrl/bcm63xx/Kconfig
- @@ -30,3 +30,18 @@ config PINCTRL_BCM6362
- select PINCONF
- select PINCTRL_BCM63XX
- select GENERIC_PINCONF
- +
- +config PINCTRL_BCM6368
- + bool "BCM6368 pincontrol driver" if COMPILE_TEST
- + select PINMUX
- + select PINCONF
- + select PINCTRL_BCM63XX
- + select GENERIC_PINCONF
- + select MFD_SYSCON
- +
- +config PINCTRL_BCM63268
- + bool "BCM63268 pincontrol driver" if COMPILE_TEST
- + select PINMUX
- + select PINCONF
- + select PINCTRL_BCM63XX
- + select GENERIC_PINCONF
- --- a/drivers/pinctrl/bcm63xx/Makefile
- +++ b/drivers/pinctrl/bcm63xx/Makefile
- @@ -3,3 +3,4 @@ obj-$(CONFIG_PINCTRL_BCM6328) += pinctrl
- obj-$(CONFIG_PINCTRL_BCM6348) += pinctrl-bcm6348.o
- obj-$(CONFIG_PINCTRL_BCM6358) += pinctrl-bcm6358.o
- obj-$(CONFIG_PINCTRL_BCM6362) += pinctrl-bcm6362.o
- +obj-$(CONFIG_PINCTRL_BCM6368) += pinctrl-bcm6368.o
- --- /dev/null
- +++ b/drivers/pinctrl/bcm63xx/pinctrl-bcm6368.c
- @@ -0,0 +1,573 @@
- +/*
- + * This file is subject to the terms and conditions of the GNU General Public
- + * License. See the file "COPYING" in the main directory of this archive
- + * for more details.
- + *
- + * Copyright (C) 2016 Jonas Gorski <[email protected]>
- + */
- +
- +#include <linux/bitops.h>
- +#include <linux/kernel.h>
- +#include <linux/gpio.h>
- +#include <linux/mfd/syscon.h>
- +#include <linux/of.h>
- +#include <linux/of_address.h>
- +#include <linux/of_gpio.h>
- +#include <linux/pinctrl/pinconf.h>
- +#include <linux/pinctrl/pinconf-generic.h>
- +#include <linux/pinctrl/pinmux.h>
- +#include <linux/pinctrl/machine.h>
- +#include <linux/platform_device.h>
- +#include <linux/regmap.h>
- +#include <linux/slab.h>
- +#include <linux/spinlock.h>
- +
- +#include "../core.h"
- +#include "../pinctrl-utils.h"
- +
- +#include "pinctrl-bcm63xx.h"
- +
- +#define BCM6368_NGPIO 38
- +
- +#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_pinctrl {
- + struct pinctrl_dev *pctldev;
- + struct pinctrl_desc desc;
- +
- + void __iomem *mode;
- + struct regmap_field *overlay;
- +
- + /* register access lock */
- + spinlock_t lock;
- +
- + struct gpio_chip gpio[2];
- +};
- +
- +#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 void bcm6368_rmw_mux(struct bcm6368_pinctrl *pctl, void __iomem *reg,
- + u32 mask, u32 val)
- +{
- + u32 tmp;
- +
- + tmp = __raw_readl(reg);
- + tmp &= ~mask;
- + tmp |= (val & mask);
- + __raw_writel(tmp, reg);
- +}
- +
- +static int bcm6368_pinctrl_set_mux(struct pinctrl_dev *pctldev,
- + unsigned selector, unsigned group)
- +{
- + struct bcm6368_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
- + const struct bcm6368_pingroup *grp = &bcm6368_groups[group];
- + const struct bcm6368_function *fun = &bcm6368_funcs[selector];
- + unsigned long flags;
- + int i, pin;
- +
- + spin_lock_irqsave(&pctl->lock, flags);
- + if (fun->basemode) {
- + u32 mask = 0;
- +
- + for (i = 0; i < grp->num_pins; i++) {
- + pin = grp->pins[i];
- + if (pin < 32)
- + mask |= BIT(pin);
- + }
- +
- + bcm6368_rmw_mux(pctl, pctl->mode, mask, 0);
- + regmap_field_write(pctl->overlay, fun->basemode);
- + } else {
- + pin = grp->pins[0];
- +
- + if (bcm6368_pins[pin].drv_data)
- + regmap_field_write(pctl->overlay,
- + BCM6368_BASEMODE_GPIO);
- +
- + bcm6368_rmw_mux(pctl, pctl->mode, BIT(pin), BIT(pin));
- + }
- + spin_unlock_irqrestore(&pctl->lock, flags);
- +
- + for (pin = 0; pin < grp->num_pins; pin++) {
- + int hw_gpio = bcm6368_pins[pin].number;
- + struct gpio_chip *gc = &pctl->gpio[hw_gpio / 32];
- +
- + if (fun->dir_out & BIT(pin))
- + gc->direction_output(gc, hw_gpio % 32, 0);
- + else
- + gc->direction_input(gc, hw_gpio % 32);
- + }
- +
- + return 0;
- +}
- +
- +static int bcm6368_gpio_request_enable(struct pinctrl_dev *pctldev,
- + struct pinctrl_gpio_range *range,
- + unsigned offset)
- +{
- + struct bcm6368_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
- + unsigned long flags;
- +
- + if (offset >= 32 && !bcm6368_pins[offset].drv_data)
- + return 0;
- +
- + spin_lock_irqsave(&pctl->lock, flags);
- + /* disable all functions using this pin */
- + if (offset < 32)
- + bcm6368_rmw_mux(pctl, pctl->mode, BIT(offset), 0);
- +
- + if (bcm6368_pins[offset].drv_data)
- + regmap_field_write(pctl->overlay, BCM6368_BASEMODE_GPIO);
- +
- + spin_unlock_irqrestore(&pctl->lock, flags);
- +
- + return 0;
- +}
- +
- +static struct pinctrl_ops bcm6368_pctl_ops = {
- + .get_groups_count = bcm6368_pinctrl_get_group_count,
- + .get_group_name = bcm6368_pinctrl_get_group_name,
- + .get_group_pins = bcm6368_pinctrl_get_group_pins,
- +#ifdef CONFIG_OF
- + .dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
- + .dt_free_map = pinctrl_utils_free_map,
- +#endif
- +};
- +
- +static struct pinmux_ops bcm6368_pmx_ops = {
- + .get_functions_count = bcm6368_pinctrl_get_func_count,
- + .get_function_name = bcm6368_pinctrl_get_func_name,
- + .get_function_groups = bcm6368_pinctrl_get_groups,
- + .set_mux = bcm6368_pinctrl_set_mux,
- + .gpio_request_enable = bcm6368_gpio_request_enable,
- + .strict = true,
- +};
- +
- +static int bcm6368_pinctrl_probe(struct platform_device *pdev)
- +{
- + struct bcm6368_pinctrl *pctl;
- + struct resource *res;
- + void __iomem *mode;
- + struct regmap *basemode;
- + struct reg_field overlay = REG_FIELD(0, 0, 3);
- +
- + if (pdev->dev.of_node)
- + basemode = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
- + "brcm,gpiobasemode");
- + else
- + basemode = syscon_regmap_lookup_by_pdevname("syscon.b00000b8");
- +
- + if (IS_ERR(basemode))
- + return PTR_ERR(basemode);
- +
- + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mode");
- + mode = devm_ioremap_resource(&pdev->dev, res);
- + if (IS_ERR(mode))
- + return PTR_ERR(mode);
- +
- + pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL);
- + if (!pctl)
- + return -ENOMEM;
- +
- + pctl->overlay = devm_regmap_field_alloc(&pdev->dev, basemode, overlay);
- + if (IS_ERR(pctl->overlay))
- + return PTR_ERR(pctl->overlay);
- +
- + spin_lock_init(&pctl->lock);
- +
- + pctl->mode = mode;
- +
- + /* disable all muxes by default */
- + __raw_writel(0, pctl->mode);
- +
- + pctl->desc.name = dev_name(&pdev->dev);
- + pctl->desc.owner = THIS_MODULE;
- + pctl->desc.pctlops = &bcm6368_pctl_ops;
- + pctl->desc.pmxops = &bcm6368_pmx_ops;
- +
- + pctl->desc.npins = ARRAY_SIZE(bcm6368_pins);
- + pctl->desc.pins = bcm6368_pins;
- +
- + platform_set_drvdata(pdev, pctl);
- +
- + pctl->pctldev = bcm63xx_pinctrl_register(pdev, &pctl->desc, pctl,
- + pctl->gpio, BCM6368_NGPIO);
- + if (IS_ERR(pctl->pctldev))
- + return PTR_ERR(pctl->pctldev);
- +
- + return 0;
- +}
- +
- +static const struct of_device_id bcm6368_pinctrl_match[] = {
- + { .compatible = "brcm,bcm6368-pinctrl", },
- + { },
- +};
- +
- +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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