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Date: Fri, 8 Jan 2010 21:10:05 +0530
Message-ID: <a8ca84ad1001080740l63fdac79y6b478863b0a5e316@mail.gmail.com>
Subject: [beagleboard] TI:OMAP: [PATCH 3/4] Support 720Mhz configuration for
OMAP35xx
From: Khasim Syed Mohammed <khasim@beagleboard.org>
To: u-boot@lists.denx.de, beagleboard@googlegroups.com
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--001636b2ac6d98250e047ca900e4
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From bba669562fa208d12f4c7cd8188446e8576cd6ee Mon Sep 17 00:00:00 2001
From: Syed Mohammed Khasim <khasim@ti.com>
Date: Fri, 8 Jan 2010 20:34:37 +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 | 24 +++++++++++++++---------
include/twl4030.h | 16 ++++++++++++++++
4 files changed, 70 insertions(+), 11 deletions(-)
diff --git a/board/ti/beagle/beagle.c b/board/ti/beagle/beagle.c
index 0def5a6..7985ee9 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..d67517a 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..d68e515 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 +104,18 @@ void twl4030_power_mmc_init(void)
twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, byte,
TWL4030_PM_RECEIVER_VMMC1_DEDICATED);
}
+
+/*
+ * Generic function to select Device Group and Voltage
+ */
+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
--
1.5.6.3
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