diff options
Diffstat (limited to 'target/linux/brcm63xx/patches-4.9/132-pinctrl-add-a-pincontrol-driver-for-BCM6328.patch')
| -rw-r--r-- | target/linux/brcm63xx/patches-4.9/132-pinctrl-add-a-pincontrol-driver-for-BCM6328.patch | 495 |
1 files changed, 495 insertions, 0 deletions
diff --git a/target/linux/brcm63xx/patches-4.9/132-pinctrl-add-a-pincontrol-driver-for-BCM6328.patch b/target/linux/brcm63xx/patches-4.9/132-pinctrl-add-a-pincontrol-driver-for-BCM6328.patch new file mode 100644 index 0000000000..3c5f15b91f --- /dev/null +++ b/target/linux/brcm63xx/patches-4.9/132-pinctrl-add-a-pincontrol-driver-for-BCM6328.patch @@ -0,0 +1,495 @@ +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); |