+++ /dev/null
-From c12fb1774deaa9c9408b19db8d43d3612f6e47a0 Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
-Date: Wed, 26 Sep 2018 21:31:03 +0200
-Subject: [PATCH] pinctrl: bcm: add Northstar driver
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-This driver provides support for Northstar mux controller. It differs
-from Northstar Plus one so a new binding and driver were needed.
-
-Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
-Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
----
- drivers/pinctrl/bcm/Kconfig | 13 ++
- drivers/pinctrl/bcm/Makefile | 1 +
- drivers/pinctrl/bcm/pinctrl-ns.c | 372 +++++++++++++++++++++++++++++++++++++++
- 3 files changed, 386 insertions(+)
- create mode 100644 drivers/pinctrl/bcm/pinctrl-ns.c
-
---- a/drivers/pinctrl/bcm/Kconfig
-+++ b/drivers/pinctrl/bcm/Kconfig
-@@ -73,6 +73,19 @@ config PINCTRL_CYGNUS_MUX
- configuration, with the exception that certain individual pins
- can be overridden to GPIO function
-
-+config PINCTRL_NS
-+ bool "Broadcom Northstar pins driver"
-+ depends on OF && (ARCH_BCM_5301X || COMPILE_TEST)
-+ select PINMUX
-+ select GENERIC_PINCONF
-+ default ARCH_BCM_5301X
-+ help
-+ Say yes here to enable the Broadcom NS SoC pins driver.
-+
-+ The Broadcom Northstar pins driver supports muxing multi-purpose pins
-+ that can be used for various functions (e.g. SPI, I2C, UART) as well
-+ as GPIOs.
-+
- config PINCTRL_NSP_GPIO
- bool "Broadcom NSP GPIO (with PINCONF) driver"
- depends on OF_GPIO && (ARCH_BCM_NSP || COMPILE_TEST)
---- a/drivers/pinctrl/bcm/Makefile
-+++ b/drivers/pinctrl/bcm/Makefile
-@@ -5,6 +5,7 @@ obj-$(CONFIG_PINCTRL_BCM281XX) += pinct
- obj-$(CONFIG_PINCTRL_BCM2835) += pinctrl-bcm2835.o
- obj-$(CONFIG_PINCTRL_IPROC_GPIO) += pinctrl-iproc-gpio.o
- obj-$(CONFIG_PINCTRL_CYGNUS_MUX) += pinctrl-cygnus-mux.o
-+obj-$(CONFIG_PINCTRL_NS) += pinctrl-ns.o
- obj-$(CONFIG_PINCTRL_NSP_GPIO) += pinctrl-nsp-gpio.o
- obj-$(CONFIG_PINCTRL_NS2_MUX) += pinctrl-ns2-mux.o
- obj-$(CONFIG_PINCTRL_NSP_MUX) += pinctrl-nsp-mux.o
---- /dev/null
-+++ b/drivers/pinctrl/bcm/pinctrl-ns.c
-@@ -0,0 +1,372 @@
-+// SPDX-License-Identifier: GPL-2.0
-+/*
-+ * Copyright (C) 2018 Rafał Miłecki <rafal@milecki.pl>
-+ */
-+
-+#include <linux/err.h>
-+#include <linux/io.h>
-+#include <linux/module.h>
-+#include <linux/of.h>
-+#include <linux/of_device.h>
-+#include <linux/pinctrl/pinconf-generic.h>
-+#include <linux/pinctrl/pinctrl.h>
-+#include <linux/pinctrl/pinmux.h>
-+#include <linux/platform_device.h>
-+#include <linux/slab.h>
-+
-+#define FLAG_BCM4708 BIT(1)
-+#define FLAG_BCM4709 BIT(2)
-+#define FLAG_BCM53012 BIT(3)
-+
-+struct ns_pinctrl {
-+ struct device *dev;
-+ unsigned int chipset_flag;
-+ struct pinctrl_dev *pctldev;
-+ void __iomem *base;
-+
-+ struct pinctrl_desc pctldesc;
-+ struct ns_pinctrl_group *groups;
-+ unsigned int num_groups;
-+ struct ns_pinctrl_function *functions;
-+ unsigned int num_functions;
-+};
-+
-+/*
-+ * Pins
-+ */
-+
-+static const struct pinctrl_pin_desc ns_pinctrl_pins[] = {
-+ { 0, "spi_clk", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
-+ { 1, "spi_ss", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
-+ { 2, "spi_mosi", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
-+ { 3, "spi_miso", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
-+ { 4, "i2c_scl", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
-+ { 5, "i2c_sda", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
-+ { 6, "mdc", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },
-+ { 7, "mdio", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },
-+ { 8, "pwm0", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
-+ { 9, "pwm1", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
-+ { 10, "pwm2", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
-+ { 11, "pwm3", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
-+ { 12, "uart1_rx", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
-+ { 13, "uart1_tx", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
-+ { 14, "uart1_cts", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
-+ { 15, "uart1_rts", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
-+ { 16, "uart2_rx", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },
-+ { 17, "uart2_tx", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },
-+/* TODO { ??, "xtal_out", (void *)(FLAG_BCM4709) }, */
-+ { 22, "sdio_pwr", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },
-+ { 23, "sdio_en_1p8v", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },
-+};
-+
-+/*
-+ * Groups
-+ */
-+
-+struct ns_pinctrl_group {
-+ const char *name;
-+ const unsigned int *pins;
-+ const unsigned int num_pins;
-+ unsigned int chipsets;
-+};
-+
-+static const unsigned int spi_pins[] = { 0, 1, 2, 3 };
-+static const unsigned int i2c_pins[] = { 4, 5 };
-+static const unsigned int mdio_pins[] = { 6, 7 };
-+static const unsigned int pwm0_pins[] = { 8 };
-+static const unsigned int pwm1_pins[] = { 9 };
-+static const unsigned int pwm2_pins[] = { 10 };
-+static const unsigned int pwm3_pins[] = { 11 };
-+static const unsigned int uart1_pins[] = { 12, 13, 14, 15 };
-+static const unsigned int uart2_pins[] = { 16, 17 };
-+static const unsigned int sdio_pwr_pins[] = { 22 };
-+static const unsigned int sdio_1p8v_pins[] = { 23 };
-+
-+#define NS_GROUP(_name, _pins, _chipsets) \
-+{ \
-+ .name = _name, \
-+ .pins = _pins, \
-+ .num_pins = ARRAY_SIZE(_pins), \
-+ .chipsets = _chipsets, \
-+}
-+
-+static const struct ns_pinctrl_group ns_pinctrl_groups[] = {
-+ NS_GROUP("spi_grp", spi_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
-+ NS_GROUP("i2c_grp", i2c_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
-+ NS_GROUP("mdio_grp", mdio_pins, FLAG_BCM4709 | FLAG_BCM53012),
-+ NS_GROUP("pwm0_grp", pwm0_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
-+ NS_GROUP("pwm1_grp", pwm1_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
-+ NS_GROUP("pwm2_grp", pwm2_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
-+ NS_GROUP("pwm3_grp", pwm3_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
-+ NS_GROUP("uart1_grp", uart1_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
-+ NS_GROUP("uart2_grp", uart2_pins, FLAG_BCM4709 | FLAG_BCM53012),
-+ NS_GROUP("sdio_pwr_grp", sdio_pwr_pins, FLAG_BCM4709 | FLAG_BCM53012),
-+ NS_GROUP("sdio_1p8v_grp", sdio_1p8v_pins, FLAG_BCM4709 | FLAG_BCM53012),
-+};
-+
-+/*
-+ * Functions
-+ */
-+
-+struct ns_pinctrl_function {
-+ const char *name;
-+ const char * const *groups;
-+ const unsigned int num_groups;
-+ unsigned int chipsets;
-+};
-+
-+static const char * const spi_groups[] = { "spi_grp" };
-+static const char * const i2c_groups[] = { "i2c_grp" };
-+static const char * const mdio_groups[] = { "mdio_grp" };
-+static const char * const pwm_groups[] = { "pwm0_grp", "pwm1_grp", "pwm2_grp",
-+ "pwm3_grp" };
-+static const char * const uart1_groups[] = { "uart1_grp" };
-+static const char * const uart2_groups[] = { "uart2_grp" };
-+static const char * const sdio_groups[] = { "sdio_pwr_grp", "sdio_1p8v_grp" };
-+
-+#define NS_FUNCTION(_name, _groups, _chipsets) \
-+{ \
-+ .name = _name, \
-+ .groups = _groups, \
-+ .num_groups = ARRAY_SIZE(_groups), \
-+ .chipsets = _chipsets, \
-+}
-+
-+static const struct ns_pinctrl_function ns_pinctrl_functions[] = {
-+ NS_FUNCTION("spi", spi_groups, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
-+ NS_FUNCTION("i2c", i2c_groups, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
-+ NS_FUNCTION("mdio", mdio_groups, FLAG_BCM4709 | FLAG_BCM53012),
-+ NS_FUNCTION("pwm", pwm_groups, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
-+ NS_FUNCTION("uart1", uart1_groups, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
-+ NS_FUNCTION("uart2", uart2_groups, FLAG_BCM4709 | FLAG_BCM53012),
-+ NS_FUNCTION("sdio", sdio_groups, FLAG_BCM4709 | FLAG_BCM53012),
-+};
-+
-+/*
-+ * Groups code
-+ */
-+
-+static int ns_pinctrl_get_groups_count(struct pinctrl_dev *pctrl_dev)
-+{
-+ struct ns_pinctrl *ns_pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
-+
-+ return ns_pinctrl->num_groups;
-+}
-+
-+static const char *ns_pinctrl_get_group_name(struct pinctrl_dev *pctrl_dev,
-+ unsigned int selector)
-+{
-+ struct ns_pinctrl *ns_pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
-+
-+ return ns_pinctrl->groups[selector].name;
-+}
-+
-+static int ns_pinctrl_get_group_pins(struct pinctrl_dev *pctrl_dev,
-+ unsigned int selector,
-+ const unsigned int **pins,
-+ unsigned int *num_pins)
-+{
-+ struct ns_pinctrl *ns_pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
-+
-+ *pins = ns_pinctrl->groups[selector].pins;
-+ *num_pins = ns_pinctrl->groups[selector].num_pins;
-+
-+ return 0;
-+}
-+
-+static const struct pinctrl_ops ns_pinctrl_ops = {
-+ .get_groups_count = ns_pinctrl_get_groups_count,
-+ .get_group_name = ns_pinctrl_get_group_name,
-+ .get_group_pins = ns_pinctrl_get_group_pins,
-+ .dt_node_to_map = pinconf_generic_dt_node_to_map_group,
-+ .dt_free_map = pinconf_generic_dt_free_map,
-+};
-+
-+/*
-+ * Functions code
-+ */
-+
-+static int ns_pinctrl_get_functions_count(struct pinctrl_dev *pctrl_dev)
-+{
-+ struct ns_pinctrl *ns_pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
-+
-+ return ns_pinctrl->num_functions;
-+}
-+
-+static const char *ns_pinctrl_get_function_name(struct pinctrl_dev *pctrl_dev,
-+ unsigned int selector)
-+{
-+ struct ns_pinctrl *ns_pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
-+
-+ return ns_pinctrl->functions[selector].name;
-+}
-+
-+static int ns_pinctrl_get_function_groups(struct pinctrl_dev *pctrl_dev,
-+ unsigned int selector,
-+ const char * const **groups,
-+ unsigned * const num_groups)
-+{
-+ struct ns_pinctrl *ns_pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
-+
-+ *groups = ns_pinctrl->functions[selector].groups;
-+ *num_groups = ns_pinctrl->functions[selector].num_groups;
-+
-+ return 0;
-+}
-+
-+static int ns_pinctrl_set_mux(struct pinctrl_dev *pctrl_dev,
-+ unsigned int func_select,
-+ unsigned int grp_select)
-+{
-+ struct ns_pinctrl *ns_pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
-+ u32 unset = 0;
-+ u32 tmp;
-+ int i;
-+
-+ for (i = 0; i < ns_pinctrl->groups[grp_select].num_pins; i++) {
-+ int pin_number = ns_pinctrl->groups[grp_select].pins[i];
-+
-+ unset |= BIT(pin_number);
-+ }
-+
-+ tmp = readl(ns_pinctrl->base);
-+ tmp &= ~unset;
-+ writel(tmp, ns_pinctrl->base);
-+
-+ return 0;
-+}
-+
-+static const struct pinmux_ops ns_pinctrl_pmxops = {
-+ .get_functions_count = ns_pinctrl_get_functions_count,
-+ .get_function_name = ns_pinctrl_get_function_name,
-+ .get_function_groups = ns_pinctrl_get_function_groups,
-+ .set_mux = ns_pinctrl_set_mux,
-+};
-+
-+/*
-+ * Controller code
-+ */
-+
-+static struct pinctrl_desc ns_pinctrl_desc = {
-+ .name = "pinctrl-ns",
-+ .pctlops = &ns_pinctrl_ops,
-+ .pmxops = &ns_pinctrl_pmxops,
-+};
-+
-+static const struct of_device_id ns_pinctrl_of_match_table[] = {
-+ { .compatible = "brcm,bcm4708-pinmux", .data = (void *)FLAG_BCM4708, },
-+ { .compatible = "brcm,bcm4709-pinmux", .data = (void *)FLAG_BCM4709, },
-+ { .compatible = "brcm,bcm53012-pinmux", .data = (void *)FLAG_BCM53012, },
-+ { }
-+};
-+
-+static int ns_pinctrl_probe(struct platform_device *pdev)
-+{
-+ struct device *dev = &pdev->dev;
-+ const struct of_device_id *of_id;
-+ struct ns_pinctrl *ns_pinctrl;
-+ struct pinctrl_desc *pctldesc;
-+ struct pinctrl_pin_desc *pin;
-+ struct ns_pinctrl_group *group;
-+ struct ns_pinctrl_function *function;
-+ struct resource *res;
-+ int i;
-+
-+ ns_pinctrl = devm_kzalloc(dev, sizeof(*ns_pinctrl), GFP_KERNEL);
-+ if (!ns_pinctrl)
-+ return -ENOMEM;
-+ pctldesc = &ns_pinctrl->pctldesc;
-+ platform_set_drvdata(pdev, ns_pinctrl);
-+
-+ /* Set basic properties */
-+
-+ ns_pinctrl->dev = dev;
-+
-+ of_id = of_match_device(ns_pinctrl_of_match_table, dev);
-+ if (!of_id)
-+ return -EINVAL;
-+ ns_pinctrl->chipset_flag = (unsigned int)of_id->data;
-+
-+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
-+ "cru_gpio_control");
-+ ns_pinctrl->base = devm_ioremap_resource(dev, res);
-+ if (IS_ERR(ns_pinctrl->base)) {
-+ dev_err(dev, "Failed to map pinctrl regs\n");
-+ return PTR_ERR(ns_pinctrl->base);
-+ }
-+
-+ memcpy(pctldesc, &ns_pinctrl_desc, sizeof(*pctldesc));
-+
-+ /* Set pinctrl properties */
-+
-+ pctldesc->pins = devm_kcalloc(dev, ARRAY_SIZE(ns_pinctrl_pins),
-+ sizeof(struct pinctrl_pin_desc),
-+ GFP_KERNEL);
-+ if (!pctldesc->pins)
-+ return -ENOMEM;
-+ for (i = 0, pin = (struct pinctrl_pin_desc *)&pctldesc->pins[0];
-+ i < ARRAY_SIZE(ns_pinctrl_pins); i++) {
-+ const struct pinctrl_pin_desc *src = &ns_pinctrl_pins[i];
-+ unsigned int chipsets = (unsigned int)src->drv_data;
-+
-+ if (chipsets & ns_pinctrl->chipset_flag) {
-+ memcpy(pin++, src, sizeof(*src));
-+ pctldesc->npins++;
-+ }
-+ }
-+
-+ ns_pinctrl->groups = devm_kcalloc(dev, ARRAY_SIZE(ns_pinctrl_groups),
-+ sizeof(struct ns_pinctrl_group),
-+ GFP_KERNEL);
-+ if (!ns_pinctrl->groups)
-+ return -ENOMEM;
-+ for (i = 0, group = &ns_pinctrl->groups[0];
-+ i < ARRAY_SIZE(ns_pinctrl_groups); i++) {
-+ const struct ns_pinctrl_group *src = &ns_pinctrl_groups[i];
-+
-+ if (src->chipsets & ns_pinctrl->chipset_flag) {
-+ memcpy(group++, src, sizeof(*src));
-+ ns_pinctrl->num_groups++;
-+ }
-+ }
-+
-+ ns_pinctrl->functions = devm_kcalloc(dev,
-+ ARRAY_SIZE(ns_pinctrl_functions),
-+ sizeof(struct ns_pinctrl_function),
-+ GFP_KERNEL);
-+ if (!ns_pinctrl->functions)
-+ return -ENOMEM;
-+ for (i = 0, function = &ns_pinctrl->functions[0];
-+ i < ARRAY_SIZE(ns_pinctrl_functions); i++) {
-+ const struct ns_pinctrl_function *src = &ns_pinctrl_functions[i];
-+
-+ if (src->chipsets & ns_pinctrl->chipset_flag) {
-+ memcpy(function++, src, sizeof(*src));
-+ ns_pinctrl->num_functions++;
-+ }
-+ }
-+
-+ /* Register */
-+
-+ ns_pinctrl->pctldev = devm_pinctrl_register(dev, pctldesc, ns_pinctrl);
-+ if (IS_ERR(ns_pinctrl->pctldev)) {
-+ dev_err(dev, "Failed to register pinctrl\n");
-+ return PTR_ERR(ns_pinctrl->pctldev);
-+ }
-+
-+ return 0;
-+}
-+
-+static struct platform_driver ns_pinctrl_driver = {
-+ .probe = ns_pinctrl_probe,
-+ .driver = {
-+ .name = "ns-pinmux",
-+ .of_match_table = ns_pinctrl_of_match_table,
-+ },
-+};
-+
-+module_platform_driver(ns_pinctrl_driver);
-+
-+MODULE_AUTHOR("Rafał Miłecki");
-+MODULE_LICENSE("GPL v2");
-+MODULE_DEVICE_TABLE(of, ns_pinctrl_of_match_table);
projects / openwrt / openwrt.git / blobdiff