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ramips: unbreak gpio handling for uart mux group

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this should fix the handling of corner cases

Signed-off-by: John Crispin <blogic@openwrt.org>

SVN-Revision: 36543
This commit is contained in:
John Crispin 2013-05-04 11:36:51 +00:00
parent bb429757c8
commit 1c89a60431
1 changed files with 33 additions and 24 deletions
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57
target/linux/ramips/patches-3.8/0128-MIPS-ralink-add-pinmux-driver.patch
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@ -16,8 +16,10 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
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
Index: linux-3.8.11/arch/mips/ralink/Makefile
===================================================================
--- linux-3.8.11.orig/arch/mips/ralink/Makefile 2013-05-03 17:53:16.612004798 +0200
+++ linux-3.8.11/arch/mips/ralink/Makefile 2013-05-04 13:20:48.455042975 +0200
@@ -6,7 +6,7 @@
# Copyright (C) 2009-2011 Gabor Juhos <juhosg@openwrt.org>
# Copyright (C) 2013 John Crispin <blogic@openwrt.org>
@ -27,18 +29,22 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
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_
Index: linux-3.8.11/arch/mips/ralink/common.h
===================================================================
--- linux-3.8.11.orig/arch/mips/ralink/common.h 2013-05-03 17:53:16.720004800 +0200
+++ linux-3.8.11/arch/mips/ralink/common.h 2013-05-04 13:20:48.055042959 +0200
@@ -50,4 +50,6 @@
__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)
Index: linux-3.8.11/arch/mips/ralink/of.c
===================================================================
--- linux-3.8.11.orig/arch/mips/ralink/of.c 2013-05-03 17:53:16.780004804 +0200
+++ linux-3.8.11/arch/mips/ralink/of.c 2013-05-04 13:20:48.055042959 +0200
@@ -110,6 +110,8 @@
if (of_platform_populate(NULL, of_ids, NULL, NULL))
panic("failed to populate DT\n");
@ -47,9 +53,11 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
return 0;
}
--- /dev/null
+++ b/arch/mips/ralink/pinmux.c
@@ -0,0 +1,76 @@
Index: linux-3.8.11/arch/mips/ralink/pinmux.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-3.8.11/arch/mips/ralink/pinmux.c 2013-05-04 13:19:22.975039268 +0200
@@ -0,0 +1,77 @@
+/*
+ * 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
@ -67,13 +75,15 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
+
+#define SYSC_REG_GPIO_MODE 0x60
+
+static u32 ralink_mux_mask(const char *name, struct ralink_pinmux_grp *grps)
+static int ralink_mux_mask(const char *name, struct ralink_pinmux_grp *grps, u32* mask)
+{
+ for (; grps->name; grps++)
+ if (!strcmp(grps->name, name))
+ return grps->mask;
+ if (!strcmp(grps->name, name)) {
+ *mask = grps->mask;
+ return 0;
+ }
+
+ return 0;
+ return -1;
+}
+
+void ralink_pinmux(void)
@ -83,14 +93,14 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
+ struct property *prop;
+ const char *uart, *pin;
+ u32 mode = 0;
+ int m;
+
+ 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) {
+ if (!ralink_mux_mask(pin, rt_gpio_pinmux.mode, &m)) {
+ mode |= m;
+ pr_debug("pinmux: registered gpiomux \"%s\"\n", pin);
+ } else {
@ -99,8 +109,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
+ }
+
+ of_property_for_each_string(np, "ralink,pinmux", prop, pin) {
+ int m = ralink_mux_mask(pin, rt_gpio_pinmux.mode);
+ if (m) {
+ if (!ralink_mux_mask(pin, rt_gpio_pinmux.mode, &m)) {
+ mode &= ~m;
+ pr_debug("pinmux: registered pinmux \"%s\"\n", pin);
+ } else {
@ -110,13 +119,13 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
+
+ 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);
+ if (ralink_mux_mask(uart, rt_gpio_pinmux.uart, &m)) {
+ pr_err("pinmux: failed to load uartmux \"%s\"\n", uart);
+ } else {
+ pr_debug("pinmux: registered uartmux \"gpio\"\n");
+ if (m != rt_gpio_pinmux.uart_mask)
+ mode &= ~(m << rt_gpio_pinmux.uart_shift);
+ pr_debug("pinmux: registered uartmux \"%s\"\n", uart);
+ }
+ }
+