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Diffstat (limited to 'target/linux/ar71xx/patches-4.1/003-MIPS-ath79-make-bootconsole-wait-for-both-THRE-and-T.patch')
-rw-r--r--target/linux/ar71xx/patches-4.1/003-MIPS-ath79-make-bootconsole-wait-for-both-THRE-and-T.patch54
1 files changed, 0 insertions, 54 deletions
diff --git a/target/linux/ar71xx/patches-4.1/003-MIPS-ath79-make-bootconsole-wait-for-both-THRE-and-T.patch b/target/linux/ar71xx/patches-4.1/003-MIPS-ath79-make-bootconsole-wait-for-both-THRE-and-T.patch
deleted file mode 100644
index 7be14abf94..0000000000
--- a/target/linux/ar71xx/patches-4.1/003-MIPS-ath79-make-bootconsole-wait-for-both-THRE-and-T.patch
+++ /dev/null
@@ -1,54 +0,0 @@
-From f1ba020af5076172c9d29006a747ccf40027fedc Mon Sep 17 00:00:00 2001
-Message-Id: <f1ba020af5076172c9d29006a747ccf40027fedc.1458840219.git.mschiffer@universe-factory.net>
-From: Matthias Schiffer <mschiffer@universe-factory.net>
-Date: Thu, 24 Mar 2016 15:34:05 +0100
-Subject: [PATCH] MIPS: ath79: make bootconsole wait for both THRE and TEMT
-
-This makes the ath79 bootconsole behave the same way as the generic 8250
-bootconsole.
-
-Also waiting for TEMT (transmit buffer is empty) instead of just THRE
-(transmit buffer is not full) ensures that all characters have been
-transmitted before the real serial driver starts reconfiguring the serial
-controller (which would sometimes result in garbage being transmitted.)
-This change does not cause a visible performance loss.
-
-In addition, this seems to fix a hang observed in certain configurations on
-many AR7xxx/AR9xxx SoCs during autoconfig of the real serial driver.
-
-A more complete follow-up patch will disable 8250 autoconfig for ath79
-altogether (the serial controller is detected as a 16550A, which is not
-fully compatible with the ath79 serial, and the autoconfig may lead to
-undefined behavior on ath79.)
-
-Cc: <stable@vger.kernel.org>
-Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
----
- arch/mips/ath79/early_printk.c | 6 ++++--
- 1 file changed, 4 insertions(+), 2 deletions(-)
-
-diff --git a/arch/mips/ath79/early_printk.c b/arch/mips/ath79/early_printk.c
-index b955faf..d1adc59 100644
---- a/arch/mips/ath79/early_printk.c
-+++ b/arch/mips/ath79/early_printk.c
-@@ -31,13 +31,15 @@ static inline void prom_putchar_wait(void __iomem *reg, u32 mask, u32 val)
- } while (1);
- }
-
-+#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
-+
- static void prom_putchar_ar71xx(unsigned char ch)
- {
- void __iomem *base = (void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE));
-
-- prom_putchar_wait(base + UART_LSR * 4, UART_LSR_THRE, UART_LSR_THRE);
-+ prom_putchar_wait(base + UART_LSR * 4, BOTH_EMPTY, BOTH_EMPTY);
- __raw_writel(ch, base + UART_TX * 4);
-- prom_putchar_wait(base + UART_LSR * 4, UART_LSR_THRE, UART_LSR_THRE);
-+ prom_putchar_wait(base + UART_LSR * 4, BOTH_EMPTY, BOTH_EMPTY);
- }
-
- static void prom_putchar_ar933x(unsigned char ch)
---
-2.7.4
-