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| author |   H. Nikolaus Schaller <hns@goldelico.com> | 2019-09-11 19:47:12 +0200 |
|---|---|---|
| committer |   Viresh Kumar <viresh.kumar@linaro.org> | 2019-10-10 16:11:51 +0530 |
| commit | 341afbc9ea3983a2261c9e495e0b66b36b5dda20 (patch) | |
| tree | a092b4cfba77c177187119435599ad53b6218cb1 /drivers/cpufreq | |
| parent | cpufreq: ti-cpufreq: omap36xx use "cpu0","vbb" if run in multi_regulator mode (diff) | |
| download | linux-dev-341afbc9ea3983a2261c9e495e0b66b36b5dda20.tar.xz linux-dev-341afbc9ea3983a2261c9e495e0b66b36b5dda20.zip | |
ARM: dts: omap36xx: using OPP1G needs to control the abb_ldo
See DM3730,DM275 data sheet (SPRS685B) footnote (6) in Table 4-19
which says that ABB must be switched to FBB mode when using the
OPP1G.
The LOD definition abb_mpu_iva already exists so that we need
to add plumbing for vbb-supply = <&abb_mpu_iva>
and define two voltage vectors for each OPP so that the abb LDO
is also updated by the ti-cpufreq driver.
We also must switch the ti_cpufreq_soc_data to multi_regulator.
Note: reading out the abb reglator voltage to verify that
it does do transitions can be done by
cat /sys/devices/platform/68000000.ocp/483072f0.regulator-abb-mpu/regulator/regulator.*/microvolts
Likewise, read the twl4030 provided VDD voltage by
cat /sys/devices/platform/68000000.ocp/48070000.i2c/i2c-0/0-0048/48070000.i2c:twl@48:regulator-vdd1/regulator/regulator.*/microvolts
Note: to check if the ABB FBB is enabled/disabled, check
registers
PRM_LDO_ABB_CTRL 0x483072F4 bit 3:0 1=bypass 5=FBB
PRM_LDO_ABB_SETUP 0x483072F0 0x00=bypass 0x11=FBB
e.g.
/dev/mem opened.
Memory mapped at address 0xb6fe4000.
Value at address 0x483072F4 (0xb6fe42f4): 0x3205
/dev/mem opened.
Memory mapped at address 0xb6f89000.
Value at address 0x483072F4 (0xb6f892f4): 0x3201
Note: omap34xx and am3517 have/need no comparable LDO
or mechanism.
Suggested-by: Adam Ford <aford173@gmail.com>
Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Tested-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/ti-cpufreq.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/cpufreq/ti-cpufreq.c b/drivers/cpufreq/ti-cpufreq.c index a161098652e2..c7e5d3d43118 100644 --- a/drivers/cpufreq/ti-cpufreq.c +++ b/drivers/cpufreq/ti-cpufreq.c @@ -175,7 +175,7 @@ static struct ti_cpufreq_soc_data omap36xx_soc_data = { .efuse_shift = 9, .efuse_mask = BIT(9), .rev_offset = OMAP3_CONTROL_IDCODE - OMAP3_SYSCON_BASE, - .multi_regulator = false, + .multi_regulator = true, }; /** |