On Tue, Jul 17, 2018 at 04:55:10PM -0700, Doug Anderson wrote:

Hi,

On Tue, Jul 17, 2018 at 4:42 PM, Matthias Kaehlcke [off-list ref] wrote:

quoted

On Thu, Jul 12, 2018 at 02:09:04PM +0530, Amit Kucheria wrote:

quoted

We also split up the regmap address space into two, for the TM and SROT
registers. This was required to deal with different address offsets for the
TM and SROT registers across different SoC families.

8996 has two TSENS IP blocks, initialise the second one too.

Since tsens-common.c/init_common() currently only registers one address
space, the order is important (TM before SROT). This is OK since the code
doesn't really use the SROT functionality yet.

Signed-off-by: Amit Kucheria <redacted>
Reviewed-by: Bjorn Andersson <redacted>
Tested-by: Matthias Kaehlcke <mka@chromium.org>
---
 arch/arm64/boot/dts/qcom/msm8996.dtsi | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/msm8996.dtsi b/arch/arm64/boot/dts/qcom/msm8996.dtsi
index 8c7f9ca..688e752 100644
--- a/arch/arm64/boot/dts/qcom/msm8996.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8996.dtsi

@@ -459,9 +459,19 @@
                      status = "disabled";
              };

-             tsens0: thermal-sensor at 4a8000 {
+             tsens0: thermal-sensor at 4a9000 {

                                       ~~~~~~

I suppose the address of the TM block is used here instead of the SROT
address (which is lower) since SROT functionality is currently not
used. Would/should this change if/when the driver uses SROT?

For device tree you're always supposed to use the address of the first
"reg" listed as the unit address in the node name.  It doesn't matter
if it's bigger or smaller as long as it's the first one listed.

The bindings indicate that the TM block should be listed as the first
register.  This won't change even if you start using SROT.

Thanks for the clarification, there is always something more to learn!

Reviewed-by: Matthias Kaehlcke <mka@chromium.org>