diff options
Diffstat (limited to 'target/linux/ramips/patches-3.8/0128-MIPS-ralink-add-pinmux-driver.patch')
| -rw-r--r-- | target/linux/ramips/patches-3.8/0128-MIPS-ralink-add-pinmux-driver.patch | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-3.8/0128-MIPS-ralink-add-pinmux-driver.patch b/target/linux/ramips/patches-3.8/0128-MIPS-ralink-add-pinmux-driver.patch new file mode 100644 index 0000000000..bf84dd9ebe --- /dev/null +++ b/target/linux/ramips/patches-3.8/0128-MIPS-ralink-add-pinmux-driver.patch @@ -0,0 +1,128 @@ +From 5a2079532dfaf5762f658370ee7a0afb686f066e Mon Sep 17 00:00:00 2001 +From: John Crispin <blogic@openwrt.org> +Date: Mon, 22 Apr 2013 23:11:42 +0200 +Subject: [PATCH 128/137] MIPS: ralink: add pinmux driver + +Add code to setup the pinmux on ralonk SoC. The SoC has a single 32 bit register +for this functionality with simple on/off bits. Building a full featured pinctrl +driver would be overkill. + +Signed-off-by: John Crispin <blogic@openwrt.org> +--- + arch/mips/ralink/Makefile | 2 +- + arch/mips/ralink/common.h | 2 ++ + arch/mips/ralink/of.c | 2 ++ + arch/mips/ralink/pinmux.c | 76 +++++++++++++++++++++++++++++++++++++++++++++ + 4 files changed, 81 insertions(+), 1 deletion(-) + create mode 100644 arch/mips/ralink/pinmux.c + +--- a/arch/mips/ralink/Makefile ++++ b/arch/mips/ralink/Makefile +@@ -6,7 +6,7 @@ + # Copyright (C) 2009-2011 Gabor Juhos <juhosg@openwrt.org> + # Copyright (C) 2013 John Crispin <blogic@openwrt.org> + +-obj-y := prom.o of.o reset.o clk.o irq.o ++obj-y := prom.o of.o reset.o clk.o irq.o pinmux.o + + obj-$(CONFIG_SOC_RT288X) += rt288x.o + obj-$(CONFIG_SOC_RT305X) += rt305x.o +--- a/arch/mips/ralink/common.h ++++ b/arch/mips/ralink/common.h +@@ -50,4 +50,6 @@ extern void prom_soc_init(struct ralink_ + + __iomem void *plat_of_remap_node(const char *node); + ++void ralink_pinmux(void); ++ + #endif /* _RALINK_COMMON_H__ */ +--- a/arch/mips/ralink/of.c ++++ b/arch/mips/ralink/of.c +@@ -110,6 +110,8 @@ static int __init plat_of_setup(void) + if (of_platform_populate(NULL, of_ids, NULL, NULL)) + panic("failed to populate DT\n"); + ++ ralink_pinmux(); ++ + return 0; + } + +--- /dev/null ++++ b/arch/mips/ralink/pinmux.c +@@ -0,0 +1,76 @@ ++/* ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License version 2 as published ++ * by the Free Software Foundation. ++ * ++ * Copyright (C) 2013 John Crispin <blogic@openwrt.org> ++ */ ++ ++#include <linux/kernel.h> ++#include <linux/of.h> ++ ++#include <asm/mach-ralink/ralink_regs.h> ++ ++#include "common.h" ++ ++#define SYSC_REG_GPIO_MODE 0x60 ++ ++static u32 ralink_mux_mask(const char *name, struct ralink_pinmux_grp *grps) ++{ ++ for (; grps->name; grps++) ++ if (!strcmp(grps->name, name)) ++ return grps->mask; ++ ++ return 0; ++} ++ ++void ralink_pinmux(void) ++{ ++ const __be32 *wdt; ++ struct device_node *np; ++ struct property *prop; ++ const char *uart, *pin; ++ u32 mode = 0; ++ ++ np = of_find_compatible_node(NULL, NULL, "ralink,rt3050-sysc"); ++ if (!np) ++ return; ++ ++ of_property_for_each_string(np, "ralink,gpiomux", prop, pin) { ++ int m = ralink_mux_mask(pin, rt_gpio_pinmux.mode); ++ if (m) { ++ mode |= m; ++ pr_debug("pinmux: registered gpiomux \"%s\"\n", pin); ++ } else { ++ pr_err("pinmux: failed to load \"%s\"\n", pin); ++ } ++ } ++ ++ of_property_for_each_string(np, "ralink,pinmux", prop, pin) { ++ int m = ralink_mux_mask(pin, rt_gpio_pinmux.mode); ++ if (m) { ++ mode &= ~m; ++ pr_debug("pinmux: registered pinmux \"%s\"\n", pin); ++ } else { ++ pr_err("pinmux: failed to load group \"%s\"\n", pin); ++ } ++ } ++ ++ of_property_read_string(np, "ralink,uartmux", &uart); ++ if (uart) { ++ int m = ralink_mux_mask(uart, rt_gpio_pinmux.uart); ++ mode |= rt_gpio_pinmux.uart_mask << rt_gpio_pinmux.uart_shift; ++ if (m) { ++ mode &= ~(m << rt_gpio_pinmux.uart_shift); ++ pr_debug("pinmux: registered uartmux \"%s\"\n", uart); ++ } else { ++ pr_debug("pinmux: registered uartmux \"gpio\"\n"); ++ } ++ } ++ ++ wdt = of_get_property(np, "ralink,wdtmux", NULL); ++ if (wdt && *wdt && rt_gpio_pinmux.wdt_reset) ++ rt_gpio_pinmux.wdt_reset(); ++ ++ rt_sysc_w32(mode, SYSC_REG_GPIO_MODE); ++} |