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omap4: clock init support for omap4460

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Signed-off-by: Aneesh V <aneesh@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
This commit is contained in:
Aneesh V
2011-07-21 09:29:36 -04:00
committed by U-Boot
parent d506719f7f
commit b4dc644291
2 changed files with 65 additions and 8 deletions
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61
arch/arm/cpu/armv7/omap4/clocks.c
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@@ -66,7 +66,18 @@ static const u32 sys_clk_array[8] = {
* Please use this tool for creating the table for any new frequency.
*/
/* dpll locked at 1584 MHz - MPU clk at 792 MHz(OPP Turbo) */
/* dpll locked at 1840 MHz MPU clk at 920 MHz(OPP Turbo 4460) - DCC OFF */
static const struct dpll_params mpu_dpll_params_1840mhz[NUM_SYS_CLKS] = {
{230, 2, 1, -1, -1, -1, -1, -1}, /* 12 MHz */
{920, 12, 1, -1, -1, -1, -1, -1}, /* 13 MHz */
{219, 3, 1, -1, -1, -1, -1, -1}, /* 16.8 MHz */
{575, 11, 1, -1, -1, -1, -1, -1}, /* 19.2 MHz */
{460, 12, 1, -1, -1, -1, -1, -1}, /* 26 MHz */
{920, 26, 1, -1, -1, -1, -1, -1}, /* 27 MHz */
{575, 23, 1, -1, -1, -1, -1, -1} /* 38.4 MHz */
};
/* dpll locked at 1584 MHz - MPU clk at 792 MHz(OPP Turbo 4430) */
static const struct dpll_params mpu_dpll_params_1584mhz[NUM_SYS_CLKS] = {
{66, 0, 1, -1, -1, -1, -1, -1}, /* 12 MHz */
{792, 12, 1, -1, -1, -1, -1, -1}, /* 13 MHz */
@@ -320,6 +331,47 @@ u32 omap4_ddr_clk(void)
return ddr_clk;
}
/*
* Lock MPU dpll
*
* Resulting MPU frequencies:
* 4430 ES1.0 : 600 MHz
* 4430 ES2.x : 792 MHz (OPP Turbo)
* 4460 : 920 MHz (OPP Turbo) - DCC disabled
*/
void configure_mpu_dpll(void)
{
const struct dpll_params *params;
struct dpll_regs *mpu_dpll_regs;
u32 omap4_rev, sysclk_ind;
omap4_rev = omap_revision();
sysclk_ind = get_sys_clk_index();
if (omap4_rev == OMAP4430_ES1_0)
params = &mpu_dpll_params_1200mhz[sysclk_ind];
else if (omap4_rev < OMAP4460_ES1_0)
params = &mpu_dpll_params_1584mhz[sysclk_ind];
else
params = &mpu_dpll_params_1840mhz[sysclk_ind];
/* DCC and clock divider settings for 4460 */
if (omap4_rev >= OMAP4460_ES1_0) {
mpu_dpll_regs =
(struct dpll_regs *)&prcm->cm_clkmode_dpll_mpu;
bypass_dpll(&prcm->cm_clkmode_dpll_mpu);
clrbits_le32(&prcm->cm_mpu_mpu_clkctrl,
MPU_CLKCTRL_CLKSEL_EMIF_DIV_MODE_MASK);
setbits_le32(&prcm->cm_mpu_mpu_clkctrl,
MPU_CLKCTRL_CLKSEL_ABE_DIV_MODE_MASK);
clrbits_le32(&mpu_dpll_regs->cm_clksel_dpll,
CM_CLKSEL_DCC_EN_MASK);
}
do_setup_dpll(&prcm->cm_clkmode_dpll_mpu, params, DPLL_LOCK);
debug("MPU DPLL locked\n");
}
static void setup_dplls(void)
{
u32 sysclk_ind, temp;
@@ -349,12 +401,7 @@ static void setup_dplls(void)
debug("PER DPLL locked\n");
/* MPU dpll */
if (omap_revision() == OMAP4430_ES1_0)
params = &mpu_dpll_params_1200mhz[sysclk_ind];
else
params = &mpu_dpll_params_1584mhz[sysclk_ind];
do_setup_dpll(&prcm->cm_clkmode_dpll_mpu, params, DPLL_LOCK);
debug("MPU DPLL locked\n");
configure_mpu_dpll();
}
static void setup_non_essential_dplls(void)