--- /dev/null
+From fb00ef462f3f8b70ea8902151cc72810fe90b999 Mon Sep 17 00:00:00 2001
+From: Jonas Gorski <jonas.gorski@gmail.com>
+Date: Fri, 24 Jun 2016 22:16:01 +0200
+Subject: [PATCH 07/16] pinctrl: add a pincontrol driver for BCM6358
+
+Add a pincotrol driver for BCM6358. BCM6358 allow overlaying different
+functions onto the GPIO pins. It does not support configuring individual
+pins but only whole groups. These groups may overlap, and still require
+the directions to be set correctly in the GPIO register. In addition the
+functions register controls other, not directly mux related functions.
+
+Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
+---
+ drivers/pinctrl/bcm63xx/Kconfig | 8 +
+ drivers/pinctrl/bcm63xx/Makefile | 1 +
+ drivers/pinctrl/bcm63xx/pinctrl-bcm6358.c | 393 ++++++++++++++++++++++++++++++
+ 3 files changed, 402 insertions(+)
+ create mode 100644 drivers/pinctrl/bcm63xx/pinctrl-bcm6358.c
+
+--- a/drivers/pinctrl/bcm63xx/Kconfig
++++ b/drivers/pinctrl/bcm63xx/Kconfig
+@@ -15,3 +15,11 @@ config PINCTRL_BCM6348
+ select PINCONF
+ select PINCTRL_BCM63XX
+ select GENERIC_PINCONF
++
++config PINCTRL_BCM6358
++ bool "BCM6358 pincontrol driver" if COMPILE_TEST
++ select PINMUX
++ select PINCONF
++ select PINCTRL_BCM63XX
++ select GENERIC_PINCONF
++ select MFD_SYSCON
+--- a/drivers/pinctrl/bcm63xx/Makefile
++++ b/drivers/pinctrl/bcm63xx/Makefile
+@@ -1,3 +1,4 @@
+ obj-$(CONFIG_PINCTRL_BCM63XX) += pinctrl-bcm63xx.o
+ obj-$(CONFIG_PINCTRL_BCM6328) += pinctrl-bcm6328.o
+ obj-$(CONFIG_PINCTRL_BCM6348) += pinctrl-bcm6348.o
++obj-$(CONFIG_PINCTRL_BCM6358) += pinctrl-bcm6358.o
+--- /dev/null
++++ b/drivers/pinctrl/bcm63xx/pinctrl-bcm6358.c
+@@ -0,0 +1,393 @@
++/*
++ * 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 <jonas.gorski@gmail.com>
++ */
++
++#include <linux/kernel.h>
++#include <linux/bitops.h>
++#include <linux/gpio.h>
++#include <linux/gpio/driver.h>
++#include <linux/mfd/syscon.h>
++#include <linux/of.h>
++#include <linux/of_gpio.h>
++#include <linux/of_address.h>
++#include <linux/slab.h>
++#include <linux/regmap.h>
++#include <linux/platform_device.h>
++
++#include <linux/pinctrl/pinconf.h>
++#include <linux/pinctrl/pinconf-generic.h>
++#include <linux/pinctrl/pinmux.h>
++#include <linux/pinctrl/machine.h>
++
++#include "../core.h"
++#include "../pinctrl-utils.h"
++
++#include "pinctrl-bcm63xx.h"
++
++/* GPIO_MODE register */
++#define BCM6358_MODE_MUX_NONE 0
++
++/* overlays on gpio pins */
++#define BCM6358_MODE_MUX_EBI_CS BIT(5)
++#define BCM6358_MODE_MUX_UART1 BIT(6)
++#define BCM6358_MODE_MUX_SPI_CS BIT(7)
++#define BCM6358_MODE_MUX_ASYNC_MODEM BIT(8)
++#define BCM6358_MODE_MUX_LEGACY_LED BIT(9)
++#define BCM6358_MODE_MUX_SERIAL_LED BIT(10)
++#define BCM6358_MODE_MUX_LED BIT(11)
++#define BCM6358_MODE_MUX_UTOPIA BIT(12)
++#define BCM6358_MODE_MUX_CLKRST BIT(13)
++#define BCM6358_MODE_MUX_PWM_SYN_CLK BIT(14)
++#define BCM6358_MODE_MUX_SYS_IRQ BIT(15)
++
++#define BCM6358_NGPIO 40
++
++struct bcm6358_pingroup {
++ const char *name;
++ const unsigned * const pins;
++ const unsigned num_pins;
++
++ const u16 mode_val;
++
++ /* non-GPIO function muxes require the gpio direction to be set */
++ const u16 direction;
++};
++
++struct bcm6358_function {
++ const char *name;
++ const char * const *groups;
++ const unsigned num_groups;
++};
++
++struct bcm6358_pinctrl {
++ struct device *dev;
++ struct pinctrl_dev *pctldev;
++ struct pinctrl_desc desc;
++
++ struct regmap_field *overlays;
++
++ struct gpio_chip gpio[2];
++};
++
++#define BCM6358_GPIO_PIN(a, b, bit1, bit2, bit3) \
++ { \
++ .number = a, \
++ .name = b, \
++ .drv_data = (void *)(BCM6358_MODE_MUX_##bit1 | \
++ BCM6358_MODE_MUX_##bit2 | \
++ BCM6358_MODE_MUX_##bit3), \
++ }
++
++static const struct pinctrl_pin_desc bcm6358_pins[] = {
++ BCM6358_GPIO_PIN(0, "gpio0", LED, NONE, NONE),
++ BCM6358_GPIO_PIN(1, "gpio1", LED, NONE, NONE),
++ BCM6358_GPIO_PIN(2, "gpio2", LED, NONE, NONE),
++ BCM6358_GPIO_PIN(3, "gpio3", LED, NONE, NONE),
++ PINCTRL_PIN(4, "gpio4"),
++ BCM6358_GPIO_PIN(5, "gpio5", SYS_IRQ, NONE, NONE),
++ BCM6358_GPIO_PIN(6, "gpio6", SERIAL_LED, NONE, NONE),
++ BCM6358_GPIO_PIN(7, "gpio7", SERIAL_LED, NONE, NONE),
++ BCM6358_GPIO_PIN(8, "gpio8", PWM_SYN_CLK, NONE, NONE),
++ BCM6358_GPIO_PIN(9, "gpio09", LEGACY_LED, NONE, NONE),
++ BCM6358_GPIO_PIN(10, "gpio10", LEGACY_LED, NONE, NONE),
++ BCM6358_GPIO_PIN(11, "gpio11", LEGACY_LED, NONE, NONE),
++ BCM6358_GPIO_PIN(12, "gpio12", LEGACY_LED, ASYNC_MODEM, UTOPIA),
++ BCM6358_GPIO_PIN(13, "gpio13", LEGACY_LED, ASYNC_MODEM, UTOPIA),
++ BCM6358_GPIO_PIN(14, "gpio14", LEGACY_LED, ASYNC_MODEM, UTOPIA),
++ BCM6358_GPIO_PIN(15, "gpio15", LEGACY_LED, ASYNC_MODEM, UTOPIA),
++ PINCTRL_PIN(16, "gpio16"),
++ PINCTRL_PIN(17, "gpio17"),
++ PINCTRL_PIN(18, "gpio18"),
++ PINCTRL_PIN(19, "gpio19"),
++ PINCTRL_PIN(20, "gpio20"),
++ PINCTRL_PIN(21, "gpio21"),
++ BCM6358_GPIO_PIN(22, "gpio22", UTOPIA, NONE, NONE),
++ BCM6358_GPIO_PIN(23, "gpio23", UTOPIA, NONE, NONE),
++ BCM6358_GPIO_PIN(24, "gpio24", UTOPIA, NONE, NONE),
++ BCM6358_GPIO_PIN(25, "gpio25", UTOPIA, NONE, NONE),
++ BCM6358_GPIO_PIN(26, "gpio26", UTOPIA, NONE, NONE),
++ BCM6358_GPIO_PIN(27, "gpio27", UTOPIA, NONE, NONE),
++ BCM6358_GPIO_PIN(28, "gpio28", UTOPIA, UART1, NONE),
++ BCM6358_GPIO_PIN(29, "gpio29", UTOPIA, UART1, NONE),
++ BCM6358_GPIO_PIN(30, "gpio30", UTOPIA, UART1, EBI_CS),
++ BCM6358_GPIO_PIN(31, "gpio31", UTOPIA, UART1, EBI_CS),
++ BCM6358_GPIO_PIN(32, "gpio32", SPI_CS, NONE, NONE),
++ BCM6358_GPIO_PIN(33, "gpio33", SPI_CS, NONE, NONE),
++ PINCTRL_PIN(34, "gpio34"),
++ PINCTRL_PIN(35, "gpio35"),
++ PINCTRL_PIN(36, "gpio36"),
++ PINCTRL_PIN(37, "gpio37"),
++ PINCTRL_PIN(38, "gpio38"),
++ PINCTRL_PIN(39, "gpio39"),
++};
++
++static unsigned ebi_cs_grp_pins[] = { 30, 31 };
++
++static unsigned uart1_grp_pins[] = { 28, 29, 30, 31 };
++
++static unsigned spi_cs_grp_pins[] = { 32, 33 };
++
++static unsigned async_modem_grp_pins[] = { 12, 13, 14, 15 };
++
++static unsigned serial_led_grp_pins[] = { 6, 7 };
++
++static unsigned legacy_led_grp_pins[] = { 9, 10, 11, 12, 13, 14, 15 };
++
++static unsigned led_grp_pins[] = { 0, 1, 2, 3 };
++
++static unsigned utopia_grp_pins[] = {
++ 12, 13, 14, 15, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
++};
++
++static unsigned pwm_syn_clk_grp_pins[] = { 8 };
++
++static unsigned sys_irq_grp_pins[] = { 5 };
++
++#define BCM6358_GPIO_MUX_GROUP(n, bit, dir) \
++ { \
++ .name = #n, \
++ .pins = n##_pins, \
++ .num_pins = ARRAY_SIZE(n##_pins), \
++ .mode_val = BCM6358_MODE_MUX_##bit, \
++ .direction = dir, \
++ }
++
++static const struct bcm6358_pingroup bcm6358_groups[] = {
++ BCM6358_GPIO_MUX_GROUP(ebi_cs_grp, EBI_CS, 0x3),
++ BCM6358_GPIO_MUX_GROUP(uart1_grp, UART1, 0x2),
++ BCM6358_GPIO_MUX_GROUP(spi_cs_grp, SPI_CS, 0x6),
++ BCM6358_GPIO_MUX_GROUP(async_modem_grp, ASYNC_MODEM, 0x6),
++ BCM6358_GPIO_MUX_GROUP(legacy_led_grp, LEGACY_LED, 0x7f),
++ BCM6358_GPIO_MUX_GROUP(serial_led_grp, SERIAL_LED, 0x3),
++ BCM6358_GPIO_MUX_GROUP(led_grp, LED, 0xf),
++ BCM6358_GPIO_MUX_GROUP(utopia_grp, UTOPIA, 0x000f),
++ BCM6358_GPIO_MUX_GROUP(pwm_syn_clk_grp, PWM_SYN_CLK, 0x1),
++ BCM6358_GPIO_MUX_GROUP(sys_irq_grp, SYS_IRQ, 0x1),
++};
++
++static const char * const ebi_cs_groups[] = {
++ "ebi_cs_grp"
++};
++
++static const char * const uart1_groups[] = {
++ "uart1_grp"
++};
++
++static const char * const spi_cs_2_3_groups[] = {
++ "spi_cs_2_3_grp"
++};
++
++static const char * const async_modem_groups[] = {
++ "async_modem_grp"
++};
++
++static const char * const legacy_led_groups[] = {
++ "legacy_led_grp",
++};
++
++static const char * const serial_led_groups[] = {
++ "serial_led_grp",
++};
++
++static const char * const led_groups[] = {
++ "led_grp",
++};
++
++static const char * const clkrst_groups[] = {
++ "clkrst_grp",
++};
++
++static const char * const pwm_syn_clk_groups[] = {
++ "pwm_syn_clk_grp",
++};
++
++static const char * const sys_irq_groups[] = {
++ "sys_irq_grp",
++};
++
++#define BCM6358_FUN(n) \
++ { \
++ .name = #n, \
++ .groups = n##_groups, \
++ .num_groups = ARRAY_SIZE(n##_groups), \
++ }
++
++static const struct bcm6358_function bcm6358_funcs[] = {
++ BCM6358_FUN(ebi_cs),
++ BCM6358_FUN(uart1),
++ BCM6358_FUN(spi_cs_2_3),
++ BCM6358_FUN(async_modem),
++ BCM6358_FUN(legacy_led),
++ BCM6358_FUN(serial_led),
++ BCM6358_FUN(led),
++ BCM6358_FUN(clkrst),
++ BCM6358_FUN(pwm_syn_clk),
++ BCM6358_FUN(sys_irq),
++};
++
++static int bcm6358_pinctrl_get_group_count(struct pinctrl_dev *pctldev)
++{
++ return ARRAY_SIZE(bcm6358_groups);
++}
++
++static const char *bcm6358_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
++ unsigned group)
++{
++ return bcm6358_groups[group].name;
++}
++
++static int bcm6358_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
++ unsigned group, const unsigned **pins,
++ unsigned *num_pins)
++{
++ *pins = bcm6358_groups[group].pins;
++ *num_pins = bcm6358_groups[group].num_pins;
++
++ return 0;
++}
++
++static int bcm6358_pinctrl_get_func_count(struct pinctrl_dev *pctldev)
++{
++ return ARRAY_SIZE(bcm6358_funcs);
++}
++
++static const char *bcm6358_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
++ unsigned selector)
++{
++ return bcm6358_funcs[selector].name;
++}
++
++static int bcm6358_pinctrl_get_groups(struct pinctrl_dev *pctldev,
++ unsigned selector,
++ const char * const **groups,
++ unsigned * const num_groups)
++{
++ *groups = bcm6358_funcs[selector].groups;
++ *num_groups = bcm6358_funcs[selector].num_groups;
++
++ return 0;
++}
++
++static int bcm6358_pinctrl_set_mux(struct pinctrl_dev *pctldev,
++ unsigned selector, unsigned group)
++{
++ struct bcm6358_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
++ const struct bcm6358_pingroup *grp = &bcm6358_groups[group];
++ u32 val = grp->mode_val;
++ u32 mask = val;
++ unsigned pin;
++
++ for (pin = 0; pin < grp->num_pins; pin++)
++ mask |= (unsigned long)bcm6358_pins[pin].drv_data;
++
++ regmap_field_update_bits(pctl->overlays, mask, val);
++
++ for (pin = 0; pin < grp->num_pins; pin++) {
++ int hw_gpio = bcm6358_pins[pin].number;
++ struct gpio_chip *gc = &pctl->gpio[hw_gpio / 32];
++
++ if (grp->direction & BIT(pin))
++ gc->direction_output(gc, hw_gpio % 32, 0);
++ else
++ gc->direction_input(gc, hw_gpio % 32);
++ }
++
++ return 0;
++}
++
++static int bcm6358_gpio_request_enable(struct pinctrl_dev *pctldev,
++ struct pinctrl_gpio_range *range,
++ unsigned offset)
++{
++ struct bcm6358_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
++ u32 mask;
++
++ mask = (unsigned long)bcm6358_pins[offset].drv_data;
++ if (!mask)
++ return 0;
++
++ /* disable all functions using this pin */
++ return regmap_field_update_bits(pctl->overlays, mask, 0);
++}
++
++static struct pinctrl_ops bcm6358_pctl_ops = {
++ .get_groups_count = bcm6358_pinctrl_get_group_count,
++ .get_group_name = bcm6358_pinctrl_get_group_name,
++ .get_group_pins = bcm6358_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 bcm6358_pmx_ops = {
++ .get_functions_count = bcm6358_pinctrl_get_func_count,
++ .get_function_name = bcm6358_pinctrl_get_func_name,
++ .get_function_groups = bcm6358_pinctrl_get_groups,
++ .set_mux = bcm6358_pinctrl_set_mux,
++ .gpio_request_enable = bcm6358_gpio_request_enable,
++ .strict = true,
++};
++
++static int bcm6358_pinctrl_probe(struct platform_device *pdev)
++{
++ struct bcm6358_pinctrl *pctl;
++ struct regmap *mode;
++ struct reg_field overlays = REG_FIELD(0, 0, 15);
++
++ if (pdev->dev.of_node)
++ mode = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
++ "brcm,gpiomode");
++ else
++ mode = syscon_regmap_lookup_by_pdevname("syscon.fffe0098");
++
++ if (IS_ERR(mode))
++ return PTR_ERR(mode);
++
++ pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL);
++ if (!pctl)
++ return -ENOMEM;
++
++ pctl->overlays = devm_regmap_field_alloc(&pdev->dev, mode, overlays);
++ if (IS_ERR(pctl->overlays))
++ return PTR_ERR(pctl->overlays);
++
++ /* disable all muxes by default */
++ regmap_field_write(pctl->overlays, 0);
++
++ pctl->desc.name = dev_name(&pdev->dev);
++ pctl->desc.owner = THIS_MODULE;
++ pctl->desc.pctlops = &bcm6358_pctl_ops;
++ pctl->desc.pmxops = &bcm6358_pmx_ops;
++
++ pctl->desc.npins = ARRAY_SIZE(bcm6358_pins);
++ pctl->desc.pins = bcm6358_pins;
++
++ platform_set_drvdata(pdev, pctl);
++
++ pctl->pctldev = bcm63xx_pinctrl_register(pdev, &pctl->desc, pctl,
++ pctl->gpio, BCM6358_NGPIO);
++ if (IS_ERR(pctl->pctldev))
++ return PTR_ERR(pctl->pctldev);
++
++ return 0;
++}
++
++static const struct of_device_id bcm6358_pinctrl_match[] = {
++ { .compatible = "brcm,bcm6358-pinctrl", },
++ { },
++};
++
++static struct platform_driver bcm6358_pinctrl_driver = {
++ .probe = bcm6358_pinctrl_probe,
++ .driver = {
++ .name = "bcm6358-pinctrl",
++ .of_match_table = bcm6358_pinctrl_match,
++ },
++};
++
++builtin_platform_driver(bcm6358_pinctrl_driver);
projects / oweals / openwrt.git / blobdiff