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From 34a9a634432a95d8ae9af86d41fdaf32fb039c2c Mon Sep 17 00:00:00 2001
From: Gabor Juhos <juhosg@openwrt.org>
Date: Wed, 27 Mar 2013 21:10:14 +0100
Subject: [PATCH 1/5] MIPS: ralink: fix uartmux group handling
* don't try get 'ralink,uartmux' porperty if the pinmux.uart is
not initialized,
* don't touch 'mode' value if mux mask is zero
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
---
arch/mips/ralink/pinmux.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
--- a/arch/mips/ralink/pinmux.c
+++ b/arch/mips/ralink/pinmux.c
@@ -56,15 +56,19 @@ void ralink_pinmux(void)
}
}
- of_property_read_string(np, "ralink,uartmux", &uart);
+ uart = NULL;
+ if (rt_pinmux.uart)
+ of_property_read_string(np, "ralink,uartmux", &uart);
+
if (uart) {
int m = ralink_mux_mask(uart, rt_pinmux.uart);
- mode |= rt_pinmux.uart_mask << rt_pinmux.uart_shift;
+
if (m) {
- mode &= ~(m << rt_pinmux.uart_shift);
+ mode &= ~(rt_pinmux.uart_mask << rt_pinmux.uart_shift);
+ mode |= m << rt_pinmux.uart_shift;
pr_debug("pinmux: registered uartmux \"%s\"\n", uart);
} else {
- pr_debug("pinmux: registered uartmux \"gpio\"\n");
+ pr_debug("pinmux: unknown uartmux \"%s\"\n", uart);
}
}
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