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authorH. Nikolaus Schaller <hns@goldelico.com>2019-09-11 19:47:12 +0200
committerViresh Kumar <viresh.kumar@linaro.org>2019-10-10 16:11:51 +0530
commit341afbc9ea3983a2261c9e495e0b66b36b5dda20 (patch)
treea092b4cfba77c177187119435599ad53b6218cb1
parent42e52616f382a455d64629b156685d5adc21ce85 (diff)
downloadlinux-341afbc9ea3983a2261c9e495e0b66b36b5dda20.tar.bz2
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>
-rw-r--r--arch/arm/boot/dts/omap36xx.dtsi21
-rw-r--r--drivers/cpufreq/ti-cpufreq.c2
2 files changed, 17 insertions, 6 deletions
diff --git a/arch/arm/boot/dts/omap36xx.dtsi b/arch/arm/boot/dts/omap36xx.dtsi
index 2fcd0c5d72ba..c618cb257d00 100644
--- a/arch/arm/boot/dts/omap36xx.dtsi
+++ b/arch/arm/boot/dts/omap36xx.dtsi
@@ -23,6 +23,7 @@
cpu: cpu@0 {
operating-points-v2 = <&cpu0_opp_table>;
+ vbb-supply = <&abb_mpu_iva>;
clock-latency = <300000>; /* From omap-cpufreq driver */
};
};
@@ -37,9 +38,11 @@
/*
* we currently only select the max voltage from table
* Table 4-19 of the DM3730 Data sheet (SPRS685B)
- * Format is: <target min max>
+ * Format is: cpu0-supply: <target min max>
+ * vbb-supply: <target min max>
*/
- opp-microvolt = <1012500 1012500 1012500>;
+ opp-microvolt = <1012500 1012500 1012500>,
+ <1012500 1012500 1012500>;
/*
* first value is silicon revision bit mask
* second one is "speed binned" bit mask
@@ -50,25 +53,33 @@
opp100-600000000 {
opp-hz = /bits/ 64 <600000000>;
- opp-microvolt = <1200000 1200000 1200000>;
+ opp-microvolt = <1200000 1200000 1200000>,
+ <1200000 1200000 1200000>;
opp-supported-hw = <0xffffffff 3>;
};
opp130-800000000 {
opp-hz = /bits/ 64 <800000000>;
- opp-microvolt = <1325000 1325000 1325000>;
+ opp-microvolt = <1325000 1325000 1325000>,
+ <1325000 1325000 1325000>;
opp-supported-hw = <0xffffffff 3>;
};
opp1g-1000000000 {
opp-hz = /bits/ 64 <1000000000>;
- opp-microvolt = <1375000 1375000 1375000>;
+ opp-microvolt = <1375000 1375000 1375000>,
+ <1375000 1375000 1375000>;
/* only on am/dm37x with speed-binned bit set */
opp-supported-hw = <0xffffffff 2>;
turbo-mode;
};
};
+ opp_supply_mpu_iva: opp_supply {
+ compatible = "ti,omap-opp-supply";
+ ti,absolute-max-voltage-uv = <1375000>;
+ };
+
ocp@68000000 {
uart4: serial@49042000 {
compatible = "ti,omap3-uart";
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,
};
/**