+++ /dev/null
-From 45444cb631555e2dc16b95d779b10aa075c7482e Mon Sep 17 00:00:00 2001
-From: Jonas Gorski <jonas.gorski@gmail.com>
-Date: Fri, 24 Jun 2016 22:14:13 +0200
-Subject: [PATCH 05/16] pinctrl: add a pincontrol driver for BCM6348
-
-Add a pincotrol driver for BCM6348. BCM6348 allow muxing five groups of
-up to ten gpios into fourteen potential functions. It does not allow
-muxing individual pins. Some functions require more than one group to be
-muxed to the same function.
-
-Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
----
- drivers/pinctrl/bcm63xx/Kconfig | 7 +
- drivers/pinctrl/bcm63xx/Makefile | 1 +
- drivers/pinctrl/bcm63xx/pinctrl-bcm6348.c | 391 ++++++++++++++++++++++++++++++
- 3 files changed, 399 insertions(+)
- create mode 100644 drivers/pinctrl/bcm63xx/pinctrl-bcm6348.c
-
---- a/drivers/pinctrl/bcm63xx/Kconfig
-+++ b/drivers/pinctrl/bcm63xx/Kconfig
-@@ -8,3 +8,10 @@ config PINCTRL_BCM6328
- select PINCONF
- select PINCTRL_BCM63XX
- select GENERIC_PINCONF
-+
-+config PINCTRL_BCM6348
-+ bool "BCM6348 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
-@@ -1,2 +1,3 @@
- obj-$(CONFIG_PINCTRL_BCM63XX) += pinctrl-bcm63xx.o
- obj-$(CONFIG_PINCTRL_BCM6328) += pinctrl-bcm6328.o
-+obj-$(CONFIG_PINCTRL_BCM6348) += pinctrl-bcm6348.o
---- /dev/null
-+++ b/drivers/pinctrl/bcm63xx/pinctrl-bcm6348.c
-@@ -0,0 +1,391 @@
-+/*
-+ * 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/spinlock.h>
-+#include <linux/bitops.h>
-+#include <linux/gpio.h>
-+#include <linux/of.h>
-+#include <linux/of_gpio.h>
-+#include <linux/slab.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 BCM6348_NGPIO 37
-+
-+#define MAX_GROUP 4
-+#define PINS_PER_GROUP 8
-+#define PIN_TO_GROUP(pin) (MAX_GROUP - ((pin) / PINS_PER_GROUP))
-+#define GROUP_SHIFT(pin) (PIN_TO_GROUP(pin) * 4)
-+#define GROUP_MASK(pin) (0xf << GROUP_SHIFT(pin))
-+
-+struct bcm6348_pingroup {
-+ const char *name;
-+ const unsigned * const pins;
-+ const unsigned num_pins;
-+};
-+
-+struct bcm6348_function {
-+ const char *name;
-+ const char * const *groups;
-+ const unsigned num_groups;
-+ unsigned int value;
-+};
-+
-+struct bcm6348_pinctrl {
-+ struct pinctrl_dev *pctldev;
-+ struct pinctrl_desc desc;
-+
-+ void __iomem *mode;
-+
-+ /* register access lock */
-+ spinlock_t lock;
-+
-+ struct gpio_chip gpio[2];
-+};
-+
-+#define BCM6348_PIN(a, b, group) \
-+ { \
-+ .number = a, \
-+ .name = b, \
-+ .drv_data = (void *)(group), \
-+ }
-+
-+static const struct pinctrl_pin_desc bcm6348_pins[] = {
-+ BCM6348_PIN(0, "gpio0", 4),
-+ BCM6348_PIN(1, "gpio1", 4),
-+ BCM6348_PIN(2, "gpio2", 4),
-+ BCM6348_PIN(3, "gpio3", 4),
-+ BCM6348_PIN(4, "gpio4", 4),
-+ BCM6348_PIN(5, "gpio5", 4),
-+ BCM6348_PIN(6, "gpio6", 4),
-+ BCM6348_PIN(7, "gpio7", 4),
-+ BCM6348_PIN(8, "gpio8", 3),
-+ BCM6348_PIN(9, "gpio9", 3),
-+ BCM6348_PIN(10, "gpio10", 3),
-+ BCM6348_PIN(11, "gpio11", 3),
-+ BCM6348_PIN(12, "gpio12", 3),
-+ BCM6348_PIN(13, "gpio13", 3),
-+ BCM6348_PIN(14, "gpio14", 3),
-+ BCM6348_PIN(15, "gpio15", 3),
-+ BCM6348_PIN(16, "gpio16", 2),
-+ BCM6348_PIN(17, "gpio17", 2),
-+ BCM6348_PIN(18, "gpio18", 2),
-+ BCM6348_PIN(19, "gpio19", 2),
-+ BCM6348_PIN(20, "gpio20", 2),
-+ BCM6348_PIN(21, "gpio21", 2),
-+ BCM6348_PIN(22, "gpio22", 1),
-+ BCM6348_PIN(23, "gpio23", 1),
-+ BCM6348_PIN(24, "gpio24", 1),
-+ BCM6348_PIN(25, "gpio25", 1),
-+ BCM6348_PIN(26, "gpio26", 1),
-+ BCM6348_PIN(27, "gpio27", 1),
-+ BCM6348_PIN(28, "gpio28", 1),
-+ BCM6348_PIN(29, "gpio29", 1),
-+ BCM6348_PIN(30, "gpio30", 1),
-+ BCM6348_PIN(31, "gpio31", 1),
-+ BCM6348_PIN(32, "gpio32", 0),
-+ BCM6348_PIN(33, "gpio33", 0),
-+ BCM6348_PIN(34, "gpio34", 0),
-+ BCM6348_PIN(35, "gpio35", 0),
-+ BCM6348_PIN(36, "gpio36", 0),
-+};
-+
-+enum bcm6348_muxes {
-+ BCM6348_MUX_GPIO = 0,
-+ BCM6348_MUX_EXT_EPHY,
-+ BCM6348_MUX_MII_SNOOP,
-+ BCM6348_MUX_LEGACY_LED,
-+ BCM6348_MUX_MII_PCCARD,
-+ BCM6348_MUX_PCI,
-+ BCM6348_MUX_SPI_MASTER_UART,
-+ BCM6348_MUX_EXT_MII,
-+ BCM6348_MUX_UTOPIA,
-+ BCM6348_MUX_DIAG,
-+};
-+
-+static unsigned group0_pins[] = {
-+ 32, 33, 34, 35, 36,
-+};
-+
-+static unsigned group1_pins[] = {
-+ 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
-+};
-+
-+static unsigned group2_pins[] = {
-+ 16, 17, 18, 19, 20, 21,
-+};
-+
-+static unsigned group3_pins[] = {
-+ 8, 9, 10, 11, 12, 13, 14, 15,
-+};
-+
-+static unsigned group4_pins[] = {
-+ 0, 1, 2, 3, 4, 5, 6, 7,
-+};
-+
-+#define BCM6348_GROUP(n) \
-+ { \
-+ .name = #n, \
-+ .pins = n##_pins, \
-+ .num_pins = ARRAY_SIZE(n##_pins), \
-+ } \
-+
-+static struct bcm6348_pingroup bcm6348_groups[] = {
-+ BCM6348_GROUP(group0),
-+ BCM6348_GROUP(group1),
-+ BCM6348_GROUP(group2),
-+ BCM6348_GROUP(group3),
-+ BCM6348_GROUP(group4),
-+};
-+
-+static const char * const ext_mii_groups[] = {
-+ "group0",
-+ "group3",
-+};
-+
-+static const char * const ext_ephy_groups[] = {
-+ "group1",
-+ "group4"
-+};
-+
-+static const char * const mii_snoop_groups[] = {
-+ "group1",
-+ "group4",
-+};
-+
-+static const char * const legacy_led_groups[] = {
-+ "group4",
-+};
-+
-+static const char * const mii_pccard_groups[] = {
-+ "group1",
-+};
-+
-+static const char * const pci_groups[] = {
-+ "group2",
-+};
-+
-+static const char * const spi_master_uart_groups[] = {
-+ "group1",
-+};
-+
-+static const char * const utopia_groups[] = {
-+ "group0",
-+ "group1",
-+ "group3",
-+};
-+
-+static const char * const diag_groups[] = {
-+ "group0",
-+ "group1",
-+ "group2",
-+ "group4",
-+};
-+
-+#define BCM6348_FUN(n, f) \
-+ { \
-+ .name = #n, \
-+ .groups = n##_groups, \
-+ .num_groups = ARRAY_SIZE(n##_groups), \
-+ .value = BCM6348_MUX_##f, \
-+ }
-+
-+static const struct bcm6348_function bcm6348_funcs[] = {
-+ BCM6348_FUN(ext_mii, EXT_MII),
-+ BCM6348_FUN(ext_ephy, EXT_EPHY),
-+ BCM6348_FUN(mii_snoop, MII_SNOOP),
-+ BCM6348_FUN(legacy_led, LEGACY_LED),
-+ BCM6348_FUN(mii_pccard, MII_PCCARD),
-+ BCM6348_FUN(pci, PCI),
-+ BCM6348_FUN(spi_master_uart, SPI_MASTER_UART),
-+ BCM6348_FUN(utopia, UTOPIA),
-+ BCM6348_FUN(diag, DIAG),
-+};
-+
-+static int bcm6348_pinctrl_get_group_count(struct pinctrl_dev *pctldev)
-+{
-+ return ARRAY_SIZE(bcm6348_groups);
-+}
-+
-+static const char *bcm6348_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
-+ unsigned group)
-+{
-+ return bcm6348_groups[group].name;
-+}
-+
-+static int bcm6348_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
-+ unsigned group, const unsigned **pins,
-+ unsigned *num_pins)
-+{
-+ *pins = bcm6348_groups[group].pins;
-+ *num_pins = bcm6348_groups[group].num_pins;
-+
-+ return 0;
-+}
-+
-+static int bcm6348_pinctrl_get_func_count(struct pinctrl_dev *pctldev)
-+{
-+ return ARRAY_SIZE(bcm6348_funcs);
-+}
-+
-+static const char *bcm6348_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
-+ unsigned selector)
-+{
-+ return bcm6348_funcs[selector].name;
-+}
-+
-+static int bcm6348_pinctrl_get_groups(struct pinctrl_dev *pctldev,
-+ unsigned selector,
-+ const char * const **groups,
-+ unsigned * const num_groups)
-+{
-+ *groups = bcm6348_funcs[selector].groups;
-+ *num_groups = bcm6348_funcs[selector].num_groups;
-+
-+ return 0;
-+}
-+
-+static void bcm6348_rmw_mux(struct bcm6348_pinctrl *pctl, u32 mask, u32 val)
-+{
-+ unsigned long flags;
-+ u32 reg;
-+
-+ spin_lock_irqsave(&pctl->lock, flags);
-+
-+ reg = __raw_readl(pctl->mode);
-+ reg &= ~mask;
-+ reg |= val & mask;
-+ __raw_writel(reg, pctl->mode);
-+
-+ spin_unlock_irqrestore(&pctl->lock, flags);
-+}
-+
-+static int bcm6348_pinctrl_set_mux(struct pinctrl_dev *pctldev,
-+ unsigned selector, unsigned group)
-+{
-+ struct bcm6348_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
-+ const struct bcm6348_pingroup *grp = &bcm6348_groups[group];
-+ const struct bcm6348_function *f = &bcm6348_funcs[selector];
-+ u32 mask, val;
-+
-+ /*
-+ * pins n..(n+7) share the same group, so we only need to look at
-+ * the first pin.
-+ */
-+ mask = GROUP_MASK(grp->pins[0]);
-+ val = f->value << GROUP_SHIFT(grp->pins[0]);
-+
-+ bcm6348_rmw_mux(pctl, mask, val);
-+
-+ return 0;
-+}
-+
-+static int bcm6348_gpio_request_enable(struct pinctrl_dev *pctldev,
-+ struct pinctrl_gpio_range *range,
-+ unsigned offset)
-+{
-+ struct bcm6348_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
-+ struct pin_desc *desc;
-+ u32 mask;
-+
-+ /* don't reconfigure if already muxed */
-+ desc = pin_desc_get(pctldev, offset);
-+ if (desc->mux_usecount)
-+ return 0;
-+
-+ mask = GROUP_MASK(offset);
-+
-+ /* disable all functions using this pin */
-+ bcm6348_rmw_mux(pctl, mask, 0);
-+
-+ return 0;
-+}
-+
-+static struct pinctrl_ops bcm6348_pctl_ops = {
-+ .get_groups_count = bcm6348_pinctrl_get_group_count,
-+ .get_group_name = bcm6348_pinctrl_get_group_name,
-+ .get_group_pins = bcm6348_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 bcm6348_pmx_ops = {
-+ .get_functions_count = bcm6348_pinctrl_get_func_count,
-+ .get_function_name = bcm6348_pinctrl_get_func_name,
-+ .get_function_groups = bcm6348_pinctrl_get_groups,
-+ .set_mux = bcm6348_pinctrl_set_mux,
-+ .gpio_request_enable = bcm6348_gpio_request_enable,
-+ .strict = true,
-+};
-+
-+static int bcm6348_pinctrl_probe(struct platform_device *pdev)
-+{
-+ struct bcm6348_pinctrl *pctl;
-+ struct resource *res;
-+ void __iomem *mode;
-+
-+ 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;
-+
-+ 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 = &bcm6348_pctl_ops;
-+ pctl->desc.pmxops = &bcm6348_pmx_ops;
-+
-+ pctl->desc.npins = ARRAY_SIZE(bcm6348_pins);
-+ pctl->desc.pins = bcm6348_pins;
-+
-+ platform_set_drvdata(pdev, pctl);
-+
-+ pctl->pctldev = bcm63xx_pinctrl_register(pdev, &pctl->desc, pctl,
-+ pctl->gpio, BCM6348_NGPIO);
-+ if (IS_ERR(pctl->pctldev))
-+ return PTR_ERR(pctl->pctldev);
-+
-+ return 0;
-+}
-+
-+static const struct of_device_id bcm6348_pinctrl_match[] = {
-+ { .compatible = "brcm,bcm6348-pinctrl", },
-+ { },
-+};
-+
-+static struct platform_driver bcm6348_pinctrl_driver = {
-+ .probe = bcm6348_pinctrl_probe,
-+ .driver = {
-+ .name = "bcm6348-pinctrl",
-+ .of_match_table = bcm6348_pinctrl_match,
-+ },
-+};
-+
-+builtin_platform_driver(bcm6348_pinctrl_driver);
projects / openwrt / staging / chunkeey.git / blobdiff