[U-Boot] [PATCH 1/3] arm: am33xx: Fix MPU opp selection
Lokesh Vutla
lokeshvutla at ti.com
Tue May 2 14:10:24 UTC 2017
Update MPU frequencies and voltages as per the latest
DM[1] dated: OCT 2011 Revised APRIL 2016, Section 5.4.
Below is the consolidated data:
MPU values for PG 2.0 and later(Package ZCZ and ZCE):
-------------------------------------------------------
| | ZCZ | ZCE |
|-------------------------------------------------------|
| | VDD[V] | ARM [MHz] | VDD[V] | ARM [MHz] |
|-------|----------|------------|----------|------------|
| NITRO | 1.325 | 1000 | NA | NA |
|-------|----------|------------|----------|------------|
| TURBO | 1.26 | 800 | NA | NA |
|-------|----------|------------|----------|------------|
|OPP120 | 1.20 | 720 | NA | NA |
|-------|----------|------------|----------|------------|
|OPP100 | 1.10 | 600 | 1.10 | 600 |
|-------|----------|------------|----------|------------|
| OPP50 | 0.95 | 300 | 0.95 | 300 |
-------------------------------------------------------
There is no eFuse blown on PG1.0 Silicons due to which there is
no way to detect the maximum frequencies supported. So default
to OPP100 for which both frequency and voltages are common on both
the packages.
[1] http://www.ti.com/lit/ds/symlink/am3356.pdf
Signed-off-by: Lokesh Vutla <lokeshvutla at ti.com>
---
arch/arm/include/asm/arch-am33xx/clocks_am33xx.h | 4 +--
arch/arm/include/asm/arch-am33xx/cpu.h | 8 ++++++
arch/arm/mach-omap2/am33xx/sys_info.c | 33 +++++++++++++++---------
include/power/tps65910.h | 1 +
4 files changed, 32 insertions(+), 14 deletions(-)
diff --git a/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h b/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h
index 4c9352a2ed..5f11c72323 100644
--- a/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h
+++ b/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h
@@ -16,12 +16,12 @@
#define MPUPLL_M_800 800
#define MPUPLL_M_720 720
#define MPUPLL_M_600 600
-#define MPUPLL_M_550 550
+#define MPUPLL_M_500 500
#define MPUPLL_M_300 300
/* MAIN PLL Fdll = 550 MHz, by default */
#ifndef CONFIG_SYS_MPUCLK
-#define CONFIG_SYS_MPUCLK MPUPLL_M_550
+#define CONFIG_SYS_MPUCLK MPUPLL_M_500
#endif
#define UART_RESET (0x1 << 1)
diff --git a/arch/arm/include/asm/arch-am33xx/cpu.h b/arch/arm/include/asm/arch-am33xx/cpu.h
index 54f449f6e6..8cae291ea0 100644
--- a/arch/arm/include/asm/arch-am33xx/cpu.h
+++ b/arch/arm/include/asm/arch-am33xx/cpu.h
@@ -49,6 +49,14 @@
#define TI81XX 0xB81E
#define DEVICE_ID (CTRL_BASE + 0x0600)
#define DEVICE_ID_MASK 0x1FFF
+#define PACKAGE_TYPE_SHIFT 16
+#define PACKAGE_TYPE_MASK (3 << 16)
+
+/* Package Type */
+#define PACKAGE_TYPE_UNDEFINED 0x0
+#define PACKAGE_TYPE_ZCZ 0x1
+#define PACKAGE_TYPE_ZCE 0x2
+#define PACKAGE_TYPE_RESERVED 0x3
/* MPU max frequencies */
#define AM335X_ZCZ_300 0x1FEF
diff --git a/arch/arm/mach-omap2/am33xx/sys_info.c b/arch/arm/mach-omap2/am33xx/sys_info.c
index e4fc461bd8..c2df5b3ec5 100644
--- a/arch/arm/mach-omap2/am33xx/sys_info.c
+++ b/arch/arm/mach-omap2/am33xx/sys_info.c
@@ -132,13 +132,21 @@ int am335x_get_efuse_mpu_max_freq(struct ctrl_dev *cdev)
sil_rev = readl(&cdev->deviceid) >> 28;
- if (sil_rev == 1)
- /* PG 2.0, efuse may not be set. */
- return MPUPLL_M_800;
- else if (sil_rev >= 2) {
+ if (sil_rev == 0) {
+ /* No efuse in PG 1.0. So use OPP100 */
+ return MPUPLL_M_500;
+ } else if (sil_rev >= 1) {
/* Check what the efuse says our max speed is. */
- int efuse_arm_mpu_max_freq;
+ int efuse_arm_mpu_max_freq, package_type;
efuse_arm_mpu_max_freq = readl(&cdev->efuse_sma);
+ package_type = (efuse_arm_mpu_max_freq & PACKAGE_TYPE_MASK) >>
+ PACKAGE_TYPE_SHIFT;
+
+ /* PG 2.0, efuse may not be set. */
+ if (package_type == PACKAGE_TYPE_UNDEFINED || package_type ==
+ PACKAGE_TYPE_RESERVED)
+ return MPUPLL_M_800;
+
switch ((efuse_arm_mpu_max_freq & DEVICE_ID_MASK)) {
case AM335X_ZCZ_1000:
return MPUPLL_M_1000;
@@ -155,14 +163,14 @@ int am335x_get_efuse_mpu_max_freq(struct ctrl_dev *cdev)
}
}
- /* PG 1.0 or otherwise unknown, use the PG1.0 max */
- return MPUPLL_M_720;
+ /* PG 1.0 or otherwise unknown, use the PG1.0 safe */
+ return MPUPLL_M_500;
}
int am335x_get_tps65910_mpu_vdd(int sil_rev, int frequency)
{
- /* For PG2.1 and later, we have one set of values. */
- if (sil_rev >= 2) {
+ /* For PG2.0 and later, we have one set of values. */
+ if (sil_rev >= 1) {
switch (frequency) {
case MPUPLL_M_1000:
return TPS65910_OP_REG_SEL_1_3_2_5;
@@ -171,12 +179,13 @@ int am335x_get_tps65910_mpu_vdd(int sil_rev, int frequency)
case MPUPLL_M_720:
return TPS65910_OP_REG_SEL_1_2_0;
case MPUPLL_M_600:
+ case MPUPLL_M_500:
case MPUPLL_M_300:
- return TPS65910_OP_REG_SEL_1_1_3;
+ return TPS65910_OP_REG_SEL_1_1_0;
}
}
- /* Default to PG1.0/PG2.0 values. */
- return TPS65910_OP_REG_SEL_1_1_3;
+ /* Default to PG1.0 values. */
+ return TPS65910_OP_REG_SEL_1_1_0;
}
#endif
diff --git a/include/power/tps65910.h b/include/power/tps65910.h
index ca8430145b..976130dc3e 100644
--- a/include/power/tps65910.h
+++ b/include/power/tps65910.h
@@ -62,6 +62,7 @@ enum {
#define TPS65910_OP_REG_SEL_MASK (0x7F)
#define TPS65910_OP_REG_SEL_0_9_5 (0x1F) /* 0.9500 V */
+#define TPS65910_OP_REG_SEL_1_1_0 (0x2B) /* 1.1000 V */
#define TPS65910_OP_REG_SEL_1_1_3 (0x2E) /* 1.1375 V */
#define TPS65910_OP_REG_SEL_1_2_0 (0x33) /* 1.2000 V */
#define TPS65910_OP_REG_SEL_1_2_6 (0x38) /* 1.2625 V */
--
2.11.0
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