-From 393e9753f6492c1fdf55891ddee60d955ae8b119 Mon Sep 17 00:00:00 2001
-From: Jonas Gorski <jonas.gorski@gmail.com>
-Date: Fri, 24 Jun 2016 22:12:50 +0200
-Subject: [PATCH 03/16] pinctrl: add a pincontrol driver for BCM6328
-
-Add a pincontrol driver for BCM6328. BCM628 supports muxing 32 pins as
-GPIOs, as LEDs for the integrated LED controller, or various other
-functions. Its pincontrol mux registers also control other aspects, like
-switching the second USB port between host and device mode.
-
-Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
----
- drivers/pinctrl/bcm63xx/Kconfig | 7 +
- drivers/pinctrl/bcm63xx/Makefile | 1 +
- drivers/pinctrl/bcm63xx/pinctrl-bcm6328.c | 456 ++++++++++++++++++++++++++++++
- 3 files changed, 464 insertions(+)
- create mode 100644 drivers/pinctrl/bcm63xx/pinctrl-bcm6328.c
-
---- a/drivers/pinctrl/bcm63xx/Kconfig
-+++ b/drivers/pinctrl/bcm63xx/Kconfig
-@@ -1,3 +1,10 @@
- config PINCTRL_BCM63XX
- bool
- select GPIO_GENERIC
-+
-+config PINCTRL_BCM6328
-+ bool "BCM6328 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
-@@ -1 +1,2 @@
- obj-$(CONFIG_PINCTRL_BCM63XX) += pinctrl-bcm63xx.o
-+obj-$(CONFIG_PINCTRL_BCM6328) += pinctrl-bcm6328.o
---- /dev/null
-+++ b/drivers/pinctrl/bcm63xx/pinctrl-bcm6328.c
-@@ -0,0 +1,456 @@
-+/*
-+ * 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/bitops.h>
-+#include <linux/gpio.h>
-+#include <linux/kernel.h>
-+#include <linux/slab.h>
-+#include <linux/spinlock.h>
-+#include <linux/of.h>
-+#include <linux/of_gpio.h>
-+#include <linux/platform_device.h>
-+
-+#include <linux/pinctrl/machine.h>
-+#include <linux/pinctrl/pinconf.h>
-+#include <linux/pinctrl/pinconf-generic.h>
-+#include <linux/pinctrl/pinmux.h>
-+
-+#include "../core.h"
-+#include "../pinctrl-utils.h"
-+
-+#include "pinctrl-bcm63xx.h"
-+
-+#define BCM6328_MUX_LO_REG 0x4
-+#define BCM6328_MUX_HI_REG 0x0
-+#define BCM6328_MUX_OTHER_REG 0x8
-+
-+#define BCM6328_NGPIO 32
-+
-+struct bcm6328_pingroup {
-+ const char *name;
-+ const unsigned * const pins;
-+ const unsigned num_pins;
-+};
-+
-+struct bcm6328_function {
-+ const char *name;
-+ const char * const *groups;
-+ const unsigned num_groups;
-+
-+ unsigned mode_val:1;
-+ unsigned mux_val:2;
-+};
-+
-+struct bcm6328_pinctrl {
-+ struct pinctrl_dev *pctldev;
-+ struct pinctrl_desc desc;
-+
-+ void __iomem *mode;
-+ void __iomem *mux[3];
-+
-+ /* register access lock */
-+ spinlock_t lock;
-+
-+ struct gpio_chip gpio;
-+};
-+
-+static const struct pinctrl_pin_desc bcm6328_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"),
-+ PINCTRL_PIN(30, "gpio30"),
-+ PINCTRL_PIN(31, "gpio31"),
-+
-+ /*
-+ * No idea where they really are; so let's put them according
-+ * to their mux offsets.
-+ */
-+ PINCTRL_PIN(36, "hsspi_cs1"),
-+ PINCTRL_PIN(38, "usb_p2"),
-+};
-+
-+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 hsspi_cs1_pins[] = { 36 };
-+static unsigned usb_port1_pins[] = { 38 };
-+
-+#define BCM6328_GROUP(n) \
-+ { \
-+ .name = #n, \
-+ .pins = n##_pins, \
-+ .num_pins = ARRAY_SIZE(n##_pins), \
-+ }
-+
-+static struct bcm6328_pingroup bcm6328_groups[] = {
-+ BCM6328_GROUP(gpio0),
-+ BCM6328_GROUP(gpio1),
-+ BCM6328_GROUP(gpio2),
-+ BCM6328_GROUP(gpio3),
-+ BCM6328_GROUP(gpio4),
-+ BCM6328_GROUP(gpio5),
-+ BCM6328_GROUP(gpio6),
-+ BCM6328_GROUP(gpio7),
-+ BCM6328_GROUP(gpio8),
-+ BCM6328_GROUP(gpio9),
-+ BCM6328_GROUP(gpio10),
-+ BCM6328_GROUP(gpio11),
-+ BCM6328_GROUP(gpio12),
-+ BCM6328_GROUP(gpio13),
-+ BCM6328_GROUP(gpio14),
-+ BCM6328_GROUP(gpio15),
-+ BCM6328_GROUP(gpio16),
-+ BCM6328_GROUP(gpio17),
-+ BCM6328_GROUP(gpio18),
-+ BCM6328_GROUP(gpio19),
-+ BCM6328_GROUP(gpio20),
-+ BCM6328_GROUP(gpio21),
-+ BCM6328_GROUP(gpio22),
-+ BCM6328_GROUP(gpio23),
-+ BCM6328_GROUP(gpio24),
-+ BCM6328_GROUP(gpio25),
-+ BCM6328_GROUP(gpio26),
-+ BCM6328_GROUP(gpio27),
-+ BCM6328_GROUP(gpio28),
-+ BCM6328_GROUP(gpio29),
-+ BCM6328_GROUP(gpio30),
-+ BCM6328_GROUP(gpio31),
-+
-+ BCM6328_GROUP(hsspi_cs1),
-+ BCM6328_GROUP(usb_port1),
-+};
-+
-+/* GPIO_MODE */
-+static const char * const led_groups[] = {
-+ "gpio0",
-+ "gpio1",
-+ "gpio2",
-+ "gpio3",
-+ "gpio4",
-+ "gpio5",
-+ "gpio6",
-+ "gpio7",
-+ "gpio8",
-+ "gpio9",
-+ "gpio10",
-+ "gpio11",
-+ "gpio12",
-+ "gpio13",
-+ "gpio14",
-+ "gpio15",
-+ "gpio16",
-+ "gpio17",
-+ "gpio18",
-+ "gpio19",
-+ "gpio20",
-+ "gpio21",
-+ "gpio22",
-+ "gpio23",
-+};
-+
-+/* PINMUX_SEL */
-+static const char * const serial_led_data_groups[] = {
-+ "gpio6",
-+};
-+
-+static const char * const serial_led_clk_groups[] = {
-+ "gpio7",
-+};
-+
-+static const char * const inet_act_led_groups[] = {
-+ "gpio11",
-+};
-+
-+static const char * const pcie_clkreq_groups[] = {
-+ "gpio16",
-+};
-+
-+static const char * const ephy0_act_led_groups[] = {
-+ "gpio25",
-+};
-+
-+static const char * const ephy1_act_led_groups[] = {
-+ "gpio26",
-+};
-+
-+static const char * const ephy2_act_led_groups[] = {
-+ "gpio27",
-+};
-+
-+static const char * const ephy3_act_led_groups[] = {
-+ "gpio28",
-+};
-+
-+static const char * const hsspi_cs1_groups[] = {
-+ "hsspi_cs1"
-+};
-+
-+static const char * const usb_host_port_groups[] = {
-+ "usb_port1",
-+};
-+
-+static const char * const usb_device_port_groups[] = {
-+ "usb_port1",
-+};
-+
-+#define BCM6328_MODE_FUN(n) \
-+ { \
-+ .name = #n, \
-+ .groups = n##_groups, \
-+ .num_groups = ARRAY_SIZE(n##_groups), \
-+ .mode_val = 1, \
-+ }
-+
-+#define BCM6328_MUX_FUN(n, mux) \
-+ { \
-+ .name = #n, \
-+ .groups = n##_groups, \
-+ .num_groups = ARRAY_SIZE(n##_groups), \
-+ .mux_val = mux, \
-+ }
-+
-+static const struct bcm6328_function bcm6328_funcs[] = {
-+ BCM6328_MODE_FUN(led),
-+ BCM6328_MUX_FUN(serial_led_data, 2),
-+ BCM6328_MUX_FUN(serial_led_clk, 2),
-+ BCM6328_MUX_FUN(inet_act_led, 1),
-+ BCM6328_MUX_FUN(pcie_clkreq, 2),
-+ BCM6328_MUX_FUN(ephy0_act_led, 1),
-+ BCM6328_MUX_FUN(ephy1_act_led, 1),
-+ BCM6328_MUX_FUN(ephy2_act_led, 1),
-+ BCM6328_MUX_FUN(ephy3_act_led, 1),
-+ BCM6328_MUX_FUN(hsspi_cs1, 2),
-+ BCM6328_MUX_FUN(usb_host_port, 1),
-+ BCM6328_MUX_FUN(usb_device_port, 2),
-+};
-+
-+static int bcm6328_pinctrl_get_group_count(struct pinctrl_dev *pctldev)
-+{
-+ return ARRAY_SIZE(bcm6328_groups);
-+}
-+
-+static const char *bcm6328_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
-+ unsigned group)
-+{
-+ return bcm6328_groups[group].name;
-+}
-+
-+static int bcm6328_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
-+ unsigned group, const unsigned **pins,
-+ unsigned *num_pins)
-+{
-+ *pins = bcm6328_groups[group].pins;
-+ *num_pins = bcm6328_groups[group].num_pins;
-+
-+ return 0;
-+}
-+
-+static int bcm6328_pinctrl_get_func_count(struct pinctrl_dev *pctldev)
-+{
-+ return ARRAY_SIZE(bcm6328_funcs);
-+}
-+
-+static const char *bcm6328_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
-+ unsigned selector)
-+{
-+ return bcm6328_funcs[selector].name;
-+}
-+
-+static int bcm6328_pinctrl_get_groups(struct pinctrl_dev *pctldev,
-+ unsigned selector,
-+ const char * const **groups,
-+ unsigned * const num_groups)
-+{
-+ *groups = bcm6328_funcs[selector].groups;
-+ *num_groups = bcm6328_funcs[selector].num_groups;
-+
-+ return 0;
-+}
-+
-+static void bcm6328_rmw_mux(struct bcm6328_pinctrl *pctl, unsigned pin,
-+ u32 mode, u32 mux)
-+{
-+ unsigned long flags;
-+ u32 reg;
-+
-+ spin_lock_irqsave(&pctl->lock, flags);
-+ if (pin < 32) {
-+ reg = __raw_readl(pctl->mode);
-+ reg &= ~BIT(pin);
-+ if (mode)
-+ reg |= BIT(pin);
-+ __raw_writel(reg, pctl->mode);
-+ }
-+
-+ reg = __raw_readl(pctl->mux[pin / 16]);
-+ reg &= ~(3UL << ((pin % 16) * 2));
-+ reg |= mux << ((pin % 16) * 2);
-+ __raw_writel(reg, pctl->mux[pin / 16]);
-+
-+ spin_unlock_irqrestore(&pctl->lock, flags);
-+}
-+
-+static int bcm6328_pinctrl_set_mux(struct pinctrl_dev *pctldev,
-+ unsigned selector, unsigned group)
-+{
-+ struct bcm6328_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
-+ const struct bcm6328_pingroup *grp = &bcm6328_groups[group];
-+ const struct bcm6328_function *f = &bcm6328_funcs[selector];
-+
-+ bcm6328_rmw_mux(pctl, grp->pins[0], f->mode_val, f->mux_val);
-+
-+ return 0;
-+}
-+
-+static int bcm6328_gpio_request_enable(struct pinctrl_dev *pctldev,
-+ struct pinctrl_gpio_range *range,
-+ unsigned offset)
-+{
-+ struct bcm6328_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
-+
-+ /* disable all functions using this pin */
-+ bcm6328_rmw_mux(pctl, offset, 0, 0);
-+
-+ return 0;
-+}
-+
-+static struct pinctrl_ops bcm6328_pctl_ops = {
-+ .get_groups_count = bcm6328_pinctrl_get_group_count,
-+ .get_group_name = bcm6328_pinctrl_get_group_name,
-+ .get_group_pins = bcm6328_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 bcm6328_pmx_ops = {
-+ .get_functions_count = bcm6328_pinctrl_get_func_count,
-+ .get_function_name = bcm6328_pinctrl_get_func_name,
-+ .get_function_groups = bcm6328_pinctrl_get_groups,
-+ .set_mux = bcm6328_pinctrl_set_mux,
-+ .gpio_request_enable = bcm6328_gpio_request_enable,
-+ .strict = true,
-+};
-+
-+static int bcm6328_pinctrl_probe(struct platform_device *pdev)
-+{
-+ struct bcm6328_pinctrl *pctl;
-+ struct resource *res;
-+ void __iomem *mode, *mux;
-+
-+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mode");
-+ mode = devm_ioremap_resource(&pdev->dev, res);
-+ if (IS_ERR(mode))
-+ return PTR_ERR(mode);
-+
-+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mux");
-+ mux = devm_ioremap_resource(&pdev->dev, res);
-+ if (IS_ERR(mux))
-+ return PTR_ERR(mux);
-+
-+ pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL);
-+ if (!pctl)
-+ return -ENOMEM;
-+
-+ spin_lock_init(&pctl->lock);
-+
-+ pctl->mode = mode;
-+ pctl->mux[0] = mux + BCM6328_MUX_LO_REG;
-+ pctl->mux[1] = mux + BCM6328_MUX_HI_REG;
-+ pctl->mux[2] = mux + BCM6328_MUX_OTHER_REG;
-+
-+ pctl->desc.name = dev_name(&pdev->dev);
-+ pctl->desc.owner = THIS_MODULE;
-+ pctl->desc.pctlops = &bcm6328_pctl_ops;
-+ pctl->desc.pmxops = &bcm6328_pmx_ops;
-+
-+ pctl->desc.npins = ARRAY_SIZE(bcm6328_pins);
-+ pctl->desc.pins = bcm6328_pins;
-+
-+ platform_set_drvdata(pdev, pctl);
-+
-+ pctl->pctldev = bcm63xx_pinctrl_register(pdev, &pctl->desc, pctl,
-+ &pctl->gpio, BCM6328_NGPIO);
-+ if (IS_ERR(pctl->pctldev))
-+ return PTR_ERR(pctl->pctldev);
-+
-+ return 0;
-+}
-+
-+static const struct of_device_id bcm6328_pinctrl_match[] = {
-+ { .compatible = "brcm,bcm6328-pinctrl", },
-+ { },
-+};
-+
-+static struct platform_driver bcm6328_pinctrl_driver = {
-+ .probe = bcm6328_pinctrl_probe,
-+ .driver = {
-+ .name = "bcm6328-pinctrl",
-+ .of_match_table = bcm6328_pinctrl_match,
-+ },
-+};
-+
-+builtin_platform_driver(bcm6328_pinctrl_driver);
projects / openwrt / staging / wigyori.git / blobdiff