From: "Eric Bénard" <eric@eukrea.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 1/2] da850: provide davinci_enable_uart0
Date: Mon, 22 Apr 2013 17:54:59 +0200 [thread overview]
Message-ID: <1366646100-2456-1-git-send-email-eric@eukrea.com> (raw)
this is needed to bring UART0 out of reset but this function
currently only exists for dm644x/355/365/646x when da850 (at
least am1808 also need it).
Signed-off-by: Eric B?nard <eric@eukrea.com>
---
arch/arm/cpu/arm926ejs/davinci/da850_lowlevel.c | 8 ++++++++
arch/arm/include/asm/arch-davinci/hardware.h | 2 ++
2 files changed, 10 insertions(+)
diff --git a/arch/arm/cpu/arm926ejs/davinci/da850_lowlevel.c b/arch/arm/cpu/arm926ejs/davinci/da850_lowlevel.c
index ff2e2e3..127beb8 100644
--- a/arch/arm/cpu/arm926ejs/davinci/da850_lowlevel.c
+++ b/arch/arm/cpu/arm926ejs/davinci/da850_lowlevel.c
@@ -32,6 +32,14 @@
#include <asm/arch/emif_defs.h>
#include <asm/arch/pll_defs.h>
+void davinci_enable_uart0(void)
+{
+ lpsc_on(DAVINCI_LPSC_UART0);
+
+ /* Bringup UART0 out of reset */
+ REG(UART0_PWREMU_MGMT) = 0x00006001;
+}
+
#if defined(CONFIG_SYS_DA850_PLL_INIT)
void da850_waitloop(unsigned long loopcnt)
{
diff --git a/arch/arm/include/asm/arch-davinci/hardware.h b/arch/arm/include/asm/arch-davinci/hardware.h
index 6eed6c9..a9017e4 100644
--- a/arch/arm/include/asm/arch-davinci/hardware.h
+++ b/arch/arm/include/asm/arch-davinci/hardware.h
@@ -346,6 +346,8 @@ void davinci_errata_workarounds(void);
#define PSC_PSC0_MODULE_ID_CNT 16
#define PSC_PSC1_MODULE_ID_CNT 32
+#define UART0_PWREMU_MGMT (0x01c42030)
+
struct davinci_psc_regs {
dv_reg revid;
dv_reg rsvd0[71];
--
1.7.11.7
next reply other threads:[~2013-04-22 15:54 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-22 15:54 Eric Bénard [this message]
2013-04-22 15:55 ` [U-Boot] [PATCH 2/2] davinci: handle CONFIG_SYS_CLE_MASK and CONFIG_SYS_ALE_MASK Eric Bénard
2013-04-29 20:22 ` [U-Boot] [PATCH 1/2] da850: provide davinci_enable_uart0 Tom Rini
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