arm: am33xx: Fix MPU opp selection

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@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

diff --git a/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h b/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h
index c06b01b..dfdb6c7 100644 (file)
--- a/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h
+++ b/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h
@@ -16,7 +16,7 @@
 #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
 
 #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 54f449f..8cae291 100644 (file)
--- 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/Kconfig b/arch/arm/mach-omap2/Kconfig
index d3f3802..408b62c 100644 (file)
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -150,7 +150,7 @@ endchoice
 
 config SYS_MPUCLK
        int "MPU CLK speed"
-       default 550
+       default 500
        help
          Defines the MPU clock speed (in MHz).
 

diff --git a/arch/arm/mach-omap2/am33xx/sys_info.c b/arch/arm/mach-omap2/am33xx/sys_info.c
index e4fc461..58bfa5c 100644 (file)
--- 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. Use max speed */
+               return MPUPLL_M_720;
+       } 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 */
+       /* unknown, use the PG1.0 max */
        return MPUPLL_M_720;
 }
 
 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_2_6;
 }
 #endif

diff --git a/include/power/tps65910.h b/include/power/tps65910.h
index ca84301..976130d 100644 (file)
--- 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 */