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Tegra2: Use clock and pinmux functions to simplify code

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Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2011-08-30 06:23:15 +00:00 committed by Albert ARIBAUD
parent 858bd095e1
commit d07dc4993d
3 changed files with 20 additions and 76 deletions
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47
arch/arm/cpu/armv7/tegra2/ap20.c
View file

@ -40,23 +40,21 @@ void init_pllx(void)
u32 reg;
/* If PLLX is already enabled, just return */
reg = readl(&pll->pll_base);
if (reg & PLL_ENABLE)
if (readl(&pll->pll_base) & PLL_ENABLE_MASK)
return;
/* Set PLLX_MISC */
reg = CPCON; /* CPCON[11:8] = 0001 */
writel(reg, &pll->pll_misc);
writel(1 << PLL_CPCON_SHIFT, &pll->pll_misc);
/* Use 12MHz clock here */
reg = (PLL_BYPASS | PLL_DIVM_VALUE);
reg |= (1000 << 8); /* DIVN = 0x3E8 */
reg = PLL_BYPASS_MASK | (12 << PLL_DIVM_SHIFT);
reg |= 1000 << PLL_DIVN_SHIFT;
writel(reg, &pll->pll_base);
reg |= PLL_ENABLE;
reg |= PLL_ENABLE_MASK;
writel(reg, &pll->pll_base);
reg &= ~PLL_BYPASS;
reg &= ~PLL_BYPASS_MASK;
writel(reg, &pll->pll_base);
}
@ -90,16 +88,11 @@ static void enable_cpu_clock(int enable)
* always stop the clock to CPU 1.
*/
clk = readl(&clkrst->crc_clk_cpu_cmplx);
clk |= CPU1_CLK_STP;
if (enable) {
/* Unstop the CPU clock */
clk &= ~CPU0_CLK_STP;
} else {
/* Stop the CPU clock */
clk |= CPU0_CLK_STP;
}
clk |= 1 << CPU1_CLK_STP_SHIFT;
/* Stop/Unstop the CPU clock */
clk &= ~CPU0_CLK_STP_MASK;
clk |= !enable << CPU0_CLK_STP_SHIFT;
writel(clk, &clkrst->crc_clk_cpu_cmplx);
clock_enable(PERIPH_ID_CPU);
@ -177,9 +170,6 @@ static void enable_cpu_power_rail(void)
static void reset_A9_cpu(int reset)
{
struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
u32 cpu;
/*
* NOTE: Regardless of whether the request is to hold the CPU in reset
* or take it out of reset, every processor in the CPU complex
@ -188,19 +178,10 @@ static void reset_A9_cpu(int reset)
* are multiple processors in the CPU complex.
*/
/* Hold CPU 1 in reset */
cpu = SET_DBGRESET1 | SET_DERESET1 | SET_CPURESET1;
writel(cpu, &clkrst->crc_cpu_cmplx_set);
if (reset) {
/* Now place CPU0 into reset */
cpu |= SET_DBGRESET0 | SET_DERESET0 | SET_CPURESET0;
writel(cpu, &clkrst->crc_cpu_cmplx_set);
} else {
/* Take CPU0 out of reset */
cpu = CLR_DBGRESET0 | CLR_DERESET0 | CLR_CPURESET0;
writel(cpu, &clkrst->crc_cpu_cmplx_clr);
}
/* Hold CPU 1 in reset, and CPU 0 if asked */
reset_cmplx_set_enable(1, crc_rst_cpu | crc_rst_de | crc_rst_debug, 1);
reset_cmplx_set_enable(0, crc_rst_cpu | crc_rst_de | crc_rst_debug,
reset);
/* Enable/Disable master CPU reset */
reset_set_enable(PERIPH_ID_CPU, reset);

37
arch/arm/include/asm/arch-tegra2/clk_rst.h
View file

@ -140,43 +140,6 @@ struct clk_rst_ctlr {
uint crc_cpu_cmplx_clr; /* _CPU_CMPLX_CLR_0, 0x344 */
};
#define PLL_BYPASS (1 << 31)
#define PLL_ENABLE (1 << 30)
#define PLL_BASE_OVRRIDE (1 << 28)
#define PLL_DIVP_VALUE (1 << 20) /* post divider, b22:20 */
#define PLL_DIVM_VALUE 0x0C /* input divider, b4:0 */
#define SWR_UARTD_RST (1 << 1)
#define CLK_ENB_UARTD (1 << 1)
#define SWR_UARTA_RST (1 << 6)
#define CLK_ENB_UARTA (1 << 6)
#define SWR_CPU_RST (1 << 0)
#define CLK_ENB_CPU (1 << 0)
#define SWR_CSITE_RST (1 << 9)
#define CLK_ENB_CSITE (1 << 9)
#define SET_CPURESET0 (1 << 0)
#define SET_DERESET0 (1 << 4)
#define SET_DBGRESET0 (1 << 12)
#define SET_CPURESET1 (1 << 1)
#define SET_DERESET1 (1 << 5)
#define SET_DBGRESET1 (1 << 13)
#define CLR_CPURESET0 (1 << 0)
#define CLR_DERESET0 (1 << 4)
#define CLR_DBGRESET0 (1 << 12)
#define CLR_CPURESET1 (1 << 1)
#define CLR_DERESET1 (1 << 5)
#define CLR_DBGRESET1 (1 << 13)
#define CPU0_CLK_STP (1 << 8)
#define CPU1_CLK_STP (1 << 9)
#define CPCON (1 << 8)
/* CLK_RST_CONTROLLER_CLK_CPU_CMPLX_0 */
#define CPU1_CLK_STP_SHIFT 9

12
board/nvidia/common/board.c
View file

@ -81,20 +81,20 @@ static void clock_init_uart(void)
u32 reg;
reg = readl(&pll->pll_base);
if (!(reg & PLL_BASE_OVRRIDE)) {
if (!(reg & PLL_BASE_OVRRIDE_MASK)) {
/* Override pllp setup for 216MHz operation. */
reg = (PLL_BYPASS | PLL_BASE_OVRRIDE | PLL_DIVP_VALUE);
reg |= (((NVRM_PLLP_FIXED_FREQ_KHZ/500) << 8) | PLL_DIVM_VALUE);
reg = PLL_BYPASS_MASK | PLL_BASE_OVRRIDE_MASK |
(1 << PLL_DIVP_SHIFT) | (0xc << PLL_DIVM_SHIFT);
reg |= (NVRM_PLLP_FIXED_FREQ_KHZ / 500) << PLL_DIVN_SHIFT;
writel(reg, &pll->pll_base);
reg |= PLL_ENABLE;
reg |= PLL_ENABLE_MASK;
writel(reg, &pll->pll_base);
reg &= ~PLL_BYPASS;
reg &= ~PLL_BYPASS_MASK;
writel(reg, &pll->pll_base);
}
/* Now do the UART reset/clock enable */
#if defined(CONFIG_TEGRA2_ENABLE_UARTA)
/* Assert UART reset and enable clock */
reset_set_enable(PERIPH_ID_UART1, 1);