summaryrefslogtreecommitdiff
path: root/recipes/linux/linux-2.6.24/ts72xx/ep93xx-serial-uartbaud.diff
diff options
context:
space:
mode:
authorDenys Dmytriyenko <denis@denix.org>2009-03-17 14:32:59 -0400
committerDenys Dmytriyenko <denis@denix.org>2009-03-17 14:32:59 -0400
commit709c4d66e0b107ca606941b988bad717c0b45d9b (patch)
tree37ee08b1eb308f3b2b6426d5793545c38396b838 /recipes/linux/linux-2.6.24/ts72xx/ep93xx-serial-uartbaud.diff
parentfa6cd5a3b993f16c27de4ff82b42684516d433ba (diff)
rename packages/ to recipes/ per earlier agreement
See links below for more details: http://thread.gmane.org/gmane.comp.handhelds.openembedded/21326 http://thread.gmane.org/gmane.comp.handhelds.openembedded/21816 Signed-off-by: Denys Dmytriyenko <denis@denix.org> Acked-by: Mike Westerhof <mwester@dls.net> Acked-by: Philip Balister <philip@balister.org> Acked-by: Khem Raj <raj.khem@gmail.com> Acked-by: Marcin Juszkiewicz <hrw@openembedded.org> Acked-by: Koen Kooi <koen@openembedded.org> Acked-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
Diffstat (limited to 'recipes/linux/linux-2.6.24/ts72xx/ep93xx-serial-uartbaud.diff')
-rw-r--r--recipes/linux/linux-2.6.24/ts72xx/ep93xx-serial-uartbaud.diff66
1 files changed, 66 insertions, 0 deletions
diff --git a/recipes/linux/linux-2.6.24/ts72xx/ep93xx-serial-uartbaud.diff b/recipes/linux/linux-2.6.24/ts72xx/ep93xx-serial-uartbaud.diff
new file mode 100644
index 0000000000..7183ab626e
--- /dev/null
+++ b/recipes/linux/linux-2.6.24/ts72xx/ep93xx-serial-uartbaud.diff
@@ -0,0 +1,66 @@
+
+Force UARTBAUD on before uncompressing.
+
+Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
+
+Index: linux-2.6.22/include/asm-arm/arch-ep93xx/uncompress.h
+===================================================================
+--- linux-2.6.22.orig/include/asm-arm/arch-ep93xx/uncompress.h
++++ linux-2.6.22/include/asm-arm/arch-ep93xx/uncompress.h
+@@ -77,9 +77,56 @@ static void ethernet_reset(void)
+ }
+
+
++/*
++ * Some bootloaders don't turn on the UARTBAUD bit, which means that
++ * the UARTs will be running off a divided 7.3728 MHz clock instead of
++ * the 14.7456 MHz peripheral clock when linux boots.
++ *
++ * We detect that condition here and fix it by turning on UARTBAUD, and
++ * then reprogramming the divisors on all enabled UARTs to twice what
++ * they were before we turned UARTBAUD on, to preserve the programmed
++ * baud rate.
++ */
++#define PHYS_SYSCON_CLOCK_CONTROL 0x80930004
++#define SYSCON_CLOCK_UARTBAUD 0x20000000
++#define PHYS_UART1_BASE 0x808c0000
++#define PHYS_UART2_BASE 0x808d0000
++#define PHYS_UART3_BASE 0x808e0000
++
++static void uart_divisor_times_two(unsigned int base)
++{
++ u16 divisor;
++
++ divisor = __raw_readb(base + 0x0c) << 8;
++ divisor |= __raw_readb(base + 0x10);
++ if (divisor) {
++ divisor = (2 * (divisor + 1)) - 1;
++ __raw_writeb(divisor >> 8, base + 0x0c);
++ __raw_writeb(divisor & 0xff, base + 0x10);
++ __raw_writeb(__raw_readb(base + 0x08), base + 0x08);
++ }
++}
++
++static void fix_uart_base(void)
++{
++ unsigned int v;
++
++ v = __raw_readl(PHYS_SYSCON_CLOCK_CONTROL);
++ if ((v & SYSCON_CLOCK_UARTBAUD) == 0) {
++ v |= SYSCON_CLOCK_UARTBAUD;
++ __raw_writel(v, PHYS_SYSCON_CLOCK_CONTROL);
++
++ uart_divisor_times_two(PHYS_UART1_BASE);
++ uart_divisor_times_two(PHYS_UART2_BASE);
++ uart_divisor_times_two(PHYS_UART3_BASE);
++ }
++}
++
++
+ static void arch_decomp_setup(void)
+ {
+ ethernet_reset();
++ fix_uart_base();
+ }
+
+ #define arch_decomp_wdog()