From 0e03adedf321673e6051c136a38aac996f9b4d50 Mon Sep 17 00:00:00 2001
From: Syed Mohammed Khasim khasim@ti.com Date: Wed, 6 Jan 2010 19:42:24 +0530 Subject: [PATCH] Support 720Mhz configuration for OMAP35xx
Adds a new API "twl4030_pmrecv_vsel_cfg" to select voltage and group Adds support for 720Mhz in clock.c Board file modified to use these new APIs and boot at 720Mhz
Signed-off-by: Syed Mohammed Khasim khasim@ti.com --- board/ti/beagle/beagle.c | 20 ++++++++++++++++++-- cpu/arm_cortexa8/omap3/clock.c | 21 +++++++++++++++++++++ drivers/power/twl4030.c | 20 +++++++++++--------- include/twl4030.h | 16 ++++++++++++++++ 4 files changed, 66 insertions(+), 11 deletions(-)
diff --git a/board/ti/beagle/beagle.c b/board/ti/beagle/beagle.c index 17840cf..28f3685 100644 --- a/board/ti/beagle/beagle.c +++ b/board/ti/beagle/beagle.c @@ -122,9 +122,27 @@ int misc_init_r(void) struct gpio *gpio5_base = (struct gpio *)OMAP34XX_GPIO5_BASE; struct gpio *gpio6_base = (struct gpio *)OMAP34XX_GPIO6_BASE;
+ beagle_identify(); + twl4030_power_init(); twl4030_led_init();
+ if (beagle_revision == REVISION_C4) { + + /* Select TWL4030 VSEL to support 720Mhz */ + twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED, + VAUX2_VSEL_18, + TWL4030_PM_RECEIVER_VAUX2_DEV_GRP, + DEV_GRP_P1); + + twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VDD1_VSEL, + VDD1_VSEL_14, + TWL4030_PM_RECEIVER_VDD1_DEV_GRP, + DEV_GRP_P1); + + prcm_config_720mhz(); + } + /* Configure GPIOs to output */ writel(~(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1), &gpio6_base->oe); writel(~(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 | @@ -136,8 +154,6 @@ int misc_init_r(void) writel(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 | GPIO15 | GPIO14 | GPIO13 | GPIO12, &gpio5_base->setdataout);
- beagle_identify(); - dieid_num_r();
return 0; diff --git a/cpu/arm_cortexa8/omap3/clock.c b/cpu/arm_cortexa8/omap3/clock.c index 174c453..f1560fa 100644 --- a/cpu/arm_cortexa8/omap3/clock.c +++ b/cpu/arm_cortexa8/omap3/clock.c @@ -402,3 +402,24 @@ void per_clocks_enable(void)
sdelay(1000); } + +/* + * Configure PRCM registers to get 720 Mhz + * + * NOTE: N value doesn't change, only M gets affected + */ +void prcm_config_720mhz (void) +{ + struct prcm *prcm_base = (struct prcm *)PRCM_BASE; + + /* Unlock MPU DPLL (slows things down, and needed later) */ + sr32(&prcm_base->clken_pll_mpu, 0, 3, PLL_LOW_POWER_BYPASS); + wait_on_value(ST_MPU_CLK, 0, &prcm_base->idlest_pll_mpu, LDELAY); + + /* Set M */ + sr32(&prcm_base->clksel1_pll_mpu, 8, 11, 0x2D0); + + /* lock mode */ + sr32(&prcm_base->clken_pll_mpu, 0, 3, PLL_LOCK); + wait_on_value(ST_MPU_CLK, 1, &prcm_base->idlest_pll_mpu, LDELAY); +} diff --git a/drivers/power/twl4030.c b/drivers/power/twl4030.c index eb066cb..11cc727 100644 --- a/drivers/power/twl4030.c +++ b/drivers/power/twl4030.c @@ -59,16 +59,9 @@ void twl4030_power_reset_init(void) } }
- /* * Power Init */ -#define DEV_GRP_P1 0x20 -#define VAUX3_VSEL_28 0x03 -#define DEV_GRP_ALL 0xE0 -#define VPLL2_VSEL_18 0x05 -#define VDAC_VSEL_18 0x03 - void twl4030_power_init(void) { unsigned char byte; @@ -98,8 +91,6 @@ void twl4030_power_init(void) TWL4030_PM_RECEIVER_VDAC_DEDICATED); }
-#define VMMC1_VSEL_30 0x02 - void twl4030_power_mmc_init(void) { unsigned char byte; @@ -113,3 +104,14 @@ void twl4030_power_mmc_init(void) twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, byte, TWL4030_PM_RECEIVER_VMMC1_DEDICATED); } + +void twl4030_pmrecv_vsel_cfg(u8 vsel_reg, u8 vsel_val, u8 dev_grp, u8 dev_grp_sel) +{ + /* Select the Device Group */ + twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, dev_grp_sel, + dev_grp); + + /* Select the Voltage */ + twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, vsel_val, + vsel_reg); +} diff --git a/include/twl4030.h b/include/twl4030.h index f260ecb..b96c96c 100644 --- a/include/twl4030.h +++ b/include/twl4030.h @@ -359,6 +359,22 @@ #define TWL4030_USB_PHY_DPLL_CLK (1 << 0)
/* + * Voltage Selection in PM Receiver Module + */ +#define VAUX2_VSEL_18 0x05 +#define VDD1_VSEL_14 0x40 +#define VAUX3_VSEL_28 0x03 +#define VPLL2_VSEL_18 0x05 +#define VDAC_VSEL_18 0x03 +#define VMMC1_VSEL_30 0x02 + +/* + * Device Selection + */ +#define DEV_GRP_P1 0x20 +#define DEV_GRP_ALL 0xE0 + +/* * Convience functions to read and write from TWL4030 * * chip_no is the i2c address, it must be one of the chip addresses