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am33xx: Add a function to query MPU voltage in uV

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For the DM TPS65910 driver I'm working on, querying the MPU voltage
should return a value in uV. This value can then be used by the
regulator's standard function set_value to set the MPU voltage.

Signed-off-by: Felix Brack <fb@ltec.ch>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
This commit is contained in:
Felix Brack 2017-10-11 18:42:23 +02:00 committed by Tom Rini
parent ebca2083d3
commit c07bf9bea7
2 changed files with 17 additions and 0 deletions
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1
arch/arm/include/asm/arch-am33xx/sys_proto.h
View File

@ -40,6 +40,7 @@ void enable_norboot_pin_mux(void);
#endif
void am33xx_spl_board_init(void);
int am335x_get_efuse_mpu_max_freq(struct ctrl_dev *cdev);
int am335x_get_mpu_vdd(int sil_rev, int frequency);
int am335x_get_tps65910_mpu_vdd(int sil_rev, int frequency);
#endif

16
arch/arm/mach-omap2/am33xx/sys_info.c
View File

@ -175,6 +175,22 @@ int am335x_get_efuse_mpu_max_freq(struct ctrl_dev *cdev)
return MPUPLL_M_720;
}
int am335x_get_mpu_vdd(int sil_rev, int frequency)
{
int sel_mask = am335x_get_tps65910_mpu_vdd(sil_rev, frequency);
switch (sel_mask) {
case TPS65910_OP_REG_SEL_1_3_2_5:
return 1325000;
case TPS65910_OP_REG_SEL_1_2_0:
return 1200000;
case TPS65910_OP_REG_SEL_1_1_0:
return 1100000;
default:
return 1262500;
}
}
int am335x_get_tps65910_mpu_vdd(int sil_rev, int frequency)
{
/* For PG2.0 and later, we have one set of values. */