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rk29: pm: better and faster printch

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黄涛
2011-03-16 17:04:19 +08:00
parent 00b5e193e5
commit f304d79d0c
1 changed files with 5 additions and 3 deletions
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8
arch/arm/mach-rk29/pm.c
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@@ -61,9 +61,9 @@ static void inline printch(char byte)
writel(byte, RK29_UART1_BASE);
delay = (cru_readl(CRU_MODE_CON) & CRU_CPU_MODE_MASK) ? 10 : 1;
while (delay--)
delay_300us();
/* loop check LSR[6], Transmitter Empty bit */
while (!(readl(RK29_UART1_BASE + 0x14) & 0x40))
barrier();
cru_writel(gate2, CRU_CLKGATE2_CON);
cru_writel(gate1, CRU_CLKGATE1_CON);
@@ -150,7 +150,9 @@ static void __sramfunc rk29_sram_suspend(void)
/* set arm clk 24MHz/32 = 750KHz */
cru_writel(clksel0 | 0x1F, CRU_CLKSEL0_CON);
printch('8');
asm("wfi");
printch('8');
/* resume arm clk */
cru_writel(clksel0, CRU_CLKSEL0_CON);