This series is a mixed bag:
- Some code moves to allow code sharing between different SoCs with v2 of
the TSENS IP,
- a generic qcom,tsens-v2 property as a fallback compatible for all v2.x.y
platforms,
- new platform support (sdm845)
- a cleanup patch and
- a DT change to have a common way to deal with the SROT and TM registers
despite slightly different features across the IP family and different
register offsets.
Changes since v4:
- Revert back to a single fallback bindind qcom,tsens-v2 as per Rob's
suggestion.
- Rework how old (unsplit SROT and TM address space) DTs are handled by
needing a 0x1000 offset but still sharing common code in tsens-v2.c
- Remove the patch to added TRDY checks while we investigate Matthias'
reports
- Fix unit addressses for the two tsens blocks as per Stephen's comment.
Changes since v3:
- Introduce qcom,tsens-v2.4.0 property and make qcom,tsens-v2 a
fallback, compatible property.
- Rename ops_v2 to ops_generic_v2
Changes since v2:
- Based on review, moved tsens-8996.c to tsens-v2.c and changed
corresponding function names, struct names to allow for generic tsensv2
platforms
- All v2 platforms will now only need to use the qcom,tsen-v2
property
- Added a DT patch to initialize tsens driver on sdm845, now that
4.18-rc1 will contain an sdm845.dtsi
Changes since v1:
- Move get_temp() from tsens-8996 to tsens-common and rename
- Change 8996 DT entry to allow init_common() to work across
sdm845 and 8996 due to different offsets
Amit Kucheria (7):
thermal: tsens: Get rid of unused fields in structure
thermal: tsens: Add support to split up register address space into
two
dt: qcom: 8996: thermal: Move to DT initialisation
thermal: tsens: Rename tsens-8996 to tsens-v2 for reuse
thermal: tsens: Add generic support for TSENS v2 IP
dt: thermal: tsens: Document the fallback DT property for v2 of TSENS
IP
arm64: dts: sdm845: Add tsens nodes
.../devicetree/bindings/thermal/qcom-tsens.txt | 25 +++++++++++++----
arch/arm64/boot/dts/qcom/msm8996.dtsi | 12 +++++++-
arch/arm64/boot/dts/qcom/sdm845.dtsi | 16 +++++++++++
drivers/thermal/qcom/Makefile | 2 +-
drivers/thermal/qcom/tsens-common.c | 11 ++++++++
drivers/thermal/qcom/{tsens-8996.c => tsens-v2.c} | 32 ++++++++++------------
drivers/thermal/qcom/tsens.c | 3 ++
drivers/thermal/qcom/tsens.h | 8 ++++--
8 files changed, 81 insertions(+), 28 deletions(-)
rename drivers/thermal/qcom/{tsens-8996.c => tsens-v2.c} (64%)
--
2.7.4
status_field and trdy are unused in any of the tsens drivers. Remove them.
Signed-off-by: Amit Kucheria <[email protected]>
Reviewed-by: Bjorn Andersson <[email protected]>
Acked-by: Rajendra Nayak <[email protected]>
---
drivers/thermal/qcom/tsens.h | 2 --
1 file changed, 2 deletions(-)
diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
index 911c197..dc56e1e 100644
--- a/drivers/thermal/qcom/tsens.h
+++ b/drivers/thermal/qcom/tsens.h
@@ -77,9 +77,7 @@ struct tsens_device {
struct device *dev;
u32 num_sensors;
struct regmap *map;
- struct regmap_field *status_field;
struct tsens_context ctx;
- bool trdy;
const struct tsens_ops *ops;
struct tsens_sensor sensor[0];
};
--
2.7.4
SDM845 uses v2 of the TSENS IP block but the get_temp() function
appears to be identical across v2.x.y in code seen so far. We use the
generic get_temp() function defined as part of ops_generic_v2.
Signed-off-by: Amit Kucheria <[email protected]>
---
drivers/thermal/qcom/tsens-v2.c | 6 +++++-
drivers/thermal/qcom/tsens.c | 3 +++
drivers/thermal/qcom/tsens.h | 5 ++++-
3 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/thermal/qcom/tsens-v2.c b/drivers/thermal/qcom/tsens-v2.c
index 34ba6c7..f40150f 100644
--- a/drivers/thermal/qcom/tsens-v2.c
+++ b/drivers/thermal/qcom/tsens-v2.c
@@ -69,8 +69,12 @@ static const struct tsens_ops ops_generic_v2 = {
.get_temp = get_temp_tsens_v2,
};
+const struct tsens_data data_tsens_v2 = {
+ .ops = &ops_generic_v2,
+};
+
+/* Kept around for backward compatibility with old msm8996.dtsi */
const struct tsens_data data_8996 = {
.num_sensors = 13,
.ops = &ops_generic_v2,
};
-
diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
index 3440166c..a2c9bfa 100644
--- a/drivers/thermal/qcom/tsens.c
+++ b/drivers/thermal/qcom/tsens.c
@@ -72,6 +72,9 @@ static const struct of_device_id tsens_table[] = {
}, {
.compatible = "qcom,msm8996-tsens",
.data = &data_8996,
+ }, {
+ .compatible = "qcom,tsens-v2",
+ .data = &data_tsens_v2,
},
{}
};
diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
index d785b37..14331eb 100644
--- a/drivers/thermal/qcom/tsens.h
+++ b/drivers/thermal/qcom/tsens.h
@@ -88,6 +88,9 @@ void compute_intercept_slope(struct tsens_device *, u32 *, u32 *, u32);
int init_common(struct tsens_device *);
int get_temp_common(struct tsens_device *, int, int *);
-extern const struct tsens_data data_8916, data_8974, data_8960, data_8996;
+/* TSENS v1 targets */
+extern const struct tsens_data data_8916, data_8974, data_8960;
+/* TSENS v2 targets */
+extern const struct tsens_data data_8996, data_tsens_v2;
#endif /* __QCOM_TSENS_H__ */
--
2.7.4
We want to create common code for v2 of the TSENS IP block that is used in
a large number of Qualcomm SoCs. "qcom,tsens-v2" should be able to handle
most of the common functionality start with a common get_temp() function.
It is also necessary to split out the memory regions for the TM and SROT
register banks because their offsets are not constant across SoC families.
Signed-off-by: Amit Kucheria <[email protected]>
---
.../devicetree/bindings/thermal/qcom-tsens.txt | 25 +++++++++++++++++-----
1 file changed, 20 insertions(+), 5 deletions(-)
diff --git a/Documentation/devicetree/bindings/thermal/qcom-tsens.txt b/Documentation/devicetree/bindings/thermal/qcom-tsens.txt
index 06195e8..8f963b1 100644
--- a/Documentation/devicetree/bindings/thermal/qcom-tsens.txt
+++ b/Documentation/devicetree/bindings/thermal/qcom-tsens.txt
@@ -1,10 +1,16 @@
* QCOM SoC Temperature Sensor (TSENS)
Required properties:
-- compatible :
- - "qcom,msm8916-tsens" : For 8916 Family of SoCs
- - "qcom,msm8974-tsens" : For 8974 Family of SoCs
- - "qcom,msm8996-tsens" : For 8996 Family of SoCs
+- compatible:
+ Must be one of the following:
+ - "qcom,msm8916-tsens" (MSM8916)
+ - "qcom,msm8974-tsens" (MSM8974)
+ - "qcom,msm8996-tsens" (MSM8996)
+ - "qcom,msm8998-tsens", "qcom,tsens-v2" (MSM8998)
+ - "qcom,sdm845-tsens", "qcom,tsens-v2" (SDM845)
+ The generic "qcom,tsens-v2" property must be used as a fallback for any SoC with
+ version 2 of the TSENS IP. MSM8996 is the only exception beacause the generic
+ property did not exist when support was added.
- reg: Address range of the thermal registers
- #thermal-sensor-cells : Should be 1. See ./thermal.txt for a description.
@@ -12,7 +18,7 @@ Required properties:
- Refer to Documentation/devicetree/bindings/nvmem/nvmem.txt to know how to specify
nvmem cells
-Example:
+Example 1 (legacy support before a fallback tsens-v2 propoerty was introduced):
tsens: thermal-sensor@900000 {
compatible = "qcom,msm8916-tsens";
reg = <0x4a8000 0x2000>;
@@ -20,3 +26,12 @@ tsens: thermal-sensor@900000 {
nvmem-cell-names = "caldata", "calsel";
#thermal-sensor-cells = <1>;
};
+
+Example 2 (for any platform containing v2 of the TSENS IP):
+tsens0: tsens@c222000 {
+ compatible = "qcom,sdm845-tsens", "qcom,tsens-v2";
+ reg = <0xc263000 0x1ff>, /* TM */
+ <0xc222000 0x1ff>; /* SROT */
+ #qcom,sensors = <13>;
+ #thermal-sensor-cells = <1>;
+ };
--
2.7.4
We also split up the regmap address space into two, one for the TM
registers, the other for the SROT registers. This was required to deal with
different address offsets for the TM and SROT registers across different
SoC families.
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 <[email protected]>
---
arch/arm64/boot/dts/qcom/msm8996.dtsi | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/qcom/msm8996.dtsi b/arch/arm64/boot/dts/qcom/msm8996.dtsi
index 8c7f9ca..6c8a857 100644
--- a/arch/arm64/boot/dts/qcom/msm8996.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8996.dtsi
@@ -461,7 +461,17 @@
tsens0: thermal-sensor@4a8000 {
compatible = "qcom,msm8996-tsens";
- reg = <0x4a8000 0x2000>;
+ reg = <0x4a9000 0x1000>, /* TM */
+ <0x4a8000 0x1000>; /* SROT */
+ #qcom,sensors = <13>;
+ #thermal-sensor-cells = <1>;
+ };
+
+ tsens1: thermal-sensor@4ac000 {
+ compatible = "qcom,msm8996-tsens";
+ reg = <0x4ad000 0x1000>, /* TM */
+ <0x4ac000 0x1000>; /* SROT */
+ #qcom,sensors = <8>;
#thermal-sensor-cells = <1>;
};
--
2.7.4
SDM845 has two tsens blocks, one with 13 sensors and the other with 8
sensors. It uses version 2 of the TSENS IP, so use the fallback property to
allow more common code.
Signed-off-by: Amit Kucheria <[email protected]>
---
arch/arm64/boot/dts/qcom/sdm845.dtsi | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
index cdaabeb..d97ee00 100644
--- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
@@ -221,6 +221,22 @@
#interrupt-cells = <2>;
};
+ tsens0: tsens@c222000 {
+ compatible = "qcom,sdm845-tsens", "qcom,tsens-v2";
+ reg = <0xc263000 0x1ff>, /* TM */
+ <0xc222000 0x1ff>; /* SROT */
+ #qcom,sensors = <13>;
+ #thermal-sensor-cells = <1>;
+ };
+
+ tsens1: tsens@c223000 {
+ compatible = "qcom,sdm845-tsens", "qcom,tsens-v2";
+ reg = <0xc265000 0x1ff>, /* TM */
+ <0xc223000 0x1ff>; /* SROT */
+ #qcom,sensors = <8>;
+ #thermal-sensor-cells = <1>;
+ };
+
spmi_bus: spmi@c440000 {
compatible = "qcom,spmi-pmic-arb";
reg = <0xc440000 0x1100>,
--
2.7.4
The TSENS block inside the 8996 is internally classified as version 2 of
the IP. Several other SoC families use this block and can share this code.
We rename get_temp() to reflect that it can be used across the v2 family.
Signed-off-by: Amit Kucheria <[email protected]>
---
drivers/thermal/qcom/Makefile | 2 +-
drivers/thermal/qcom/{tsens-8996.c => tsens-v2.c} | 26 ++++++++---------------
2 files changed, 10 insertions(+), 18 deletions(-)
rename drivers/thermal/qcom/{tsens-8996.c => tsens-v2.c} (66%)
diff --git a/drivers/thermal/qcom/Makefile b/drivers/thermal/qcom/Makefile
index 2cc2193..a821929 100644
--- a/drivers/thermal/qcom/Makefile
+++ b/drivers/thermal/qcom/Makefile
@@ -1,2 +1,2 @@
obj-$(CONFIG_QCOM_TSENS) += qcom_tsens.o
-qcom_tsens-y += tsens.o tsens-common.o tsens-8916.o tsens-8974.o tsens-8960.o tsens-8996.o
+qcom_tsens-y += tsens.o tsens-common.o tsens-8916.o tsens-8974.o tsens-8960.o tsens-v2.o
diff --git a/drivers/thermal/qcom/tsens-8996.c b/drivers/thermal/qcom/tsens-v2.c
similarity index 66%
rename from drivers/thermal/qcom/tsens-8996.c
rename to drivers/thermal/qcom/tsens-v2.c
index 60765b1..34ba6c7 100644
--- a/drivers/thermal/qcom/tsens-8996.c
+++ b/drivers/thermal/qcom/tsens-v2.c
@@ -1,27 +1,18 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2015, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
+ * Copyright (c) 2018, Linaro Limited
*/
-#include <linux/platform_device.h>
#include <linux/regmap.h>
#include "tsens.h"
-#define STATUS_OFFSET 0x10a0
-#define LAST_TEMP_MASK 0xfff
+#define STATUS_OFFSET 0xa0
+#define LAST_TEMP_MASK 0xfff
#define STATUS_VALID_BIT BIT(21)
#define CODE_SIGN_BIT BIT(11)
-static int get_temp_8996(struct tsens_device *tmdev, int id, int *temp)
+static int get_temp_tsens_v2(struct tsens_device *tmdev, int id, int *temp)
{
struct tsens_sensor *s = &tmdev->sensor[id];
u32 code;
@@ -73,12 +64,13 @@ static int get_temp_8996(struct tsens_device *tmdev, int id, int *temp)
return 0;
}
-static const struct tsens_ops ops_8996 = {
+static const struct tsens_ops ops_generic_v2 = {
.init = init_common,
- .get_temp = get_temp_8996,
+ .get_temp = get_temp_tsens_v2,
};
const struct tsens_data data_8996 = {
.num_sensors = 13,
- .ops = &ops_8996,
+ .ops = &ops_generic_v2,
};
+
--
2.7.4
There are two banks of registers for v2 TSENS IPs: SROT and TM. On older
SoCs these were contiguous, leading to DTs mapping them as one register
address space of size 0x2000. In newer SoCs, these two banks are not
contiguous anymore.
Fixing old DTs to split the address space into allows us to have cleaner
common code e.g. get_temp() that is shared across new and old platforms.
But we need to add logic to init_common() to differentiate between old and
new DTs and adjust associated offsets for the TM register bank so that the
old DTs will continue to function correctly.
Signed-off-by: Amit Kucheria <[email protected]>
---
drivers/thermal/qcom/tsens-8996.c | 2 +-
drivers/thermal/qcom/tsens-common.c | 11 +++++++++++
drivers/thermal/qcom/tsens.h | 1 +
3 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/thermal/qcom/tsens-8996.c b/drivers/thermal/qcom/tsens-8996.c
index e1f7781..60765b1 100644
--- a/drivers/thermal/qcom/tsens-8996.c
+++ b/drivers/thermal/qcom/tsens-8996.c
@@ -28,7 +28,7 @@ static int get_temp_8996(struct tsens_device *tmdev, int id, int *temp)
unsigned int sensor_addr;
int last_temp = 0, last_temp2 = 0, last_temp3 = 0, ret;
- sensor_addr = STATUS_OFFSET + s->hw_id * 4;
+ sensor_addr = tmdev->tm_offset + STATUS_OFFSET + s->hw_id * 4;
ret = regmap_read(tmdev->map, sensor_addr, &code);
if (ret)
return ret;
diff --git a/drivers/thermal/qcom/tsens-common.c b/drivers/thermal/qcom/tsens-common.c
index b1449ad..4a741b0 100644
--- a/drivers/thermal/qcom/tsens-common.c
+++ b/drivers/thermal/qcom/tsens-common.c
@@ -16,6 +16,7 @@
#include <linux/io.h>
#include <linux/nvmem-consumer.h>
#include <linux/of_address.h>
+#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include "tsens.h"
@@ -126,11 +127,21 @@ static const struct regmap_config tsens_config = {
int __init init_common(struct tsens_device *tmdev)
{
void __iomem *base;
+ struct platform_device *op = of_find_device_by_node(tmdev->dev->of_node);
+ if (!op)
+ return -EINVAL;
base = of_iomap(tmdev->dev->of_node, 0);
if (!base)
return -EINVAL;
+ if (op->num_resources > 1) {
+ tmdev->tm_offset = 0;
+ } else {
+ /* old DTs where SROT and TM were in a contiguous 2K block */
+ tmdev->tm_offset = 0x1000;
+ }
+
tmdev->map = devm_regmap_init_mmio(tmdev->dev, base, &tsens_config);
if (IS_ERR(tmdev->map)) {
iounmap(base);
diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
index dc56e1e..d785b37 100644
--- a/drivers/thermal/qcom/tsens.h
+++ b/drivers/thermal/qcom/tsens.h
@@ -77,6 +77,7 @@ struct tsens_device {
struct device *dev;
u32 num_sensors;
struct regmap *map;
+ u32 tm_offset;
struct tsens_context ctx;
const struct tsens_ops *ops;
struct tsens_sensor sensor[0];
--
2.7.4
On Mon, Jul 9, 2018 at 4:57 PM, Amit Kucheria <[email protected]> wrote:
> SDM845 has two tsens blocks, one with 13 sensors and the other with 8
> sensors. It uses version 2 of the TSENS IP, so use the fallback property to
> allow more common code.
>
> Signed-off-by: Amit Kucheria <[email protected]>
> ---
> arch/arm64/boot/dts/qcom/sdm845.dtsi | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> index cdaabeb..d97ee00 100644
> --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> @@ -221,6 +221,22 @@
> #interrupt-cells = <2>;
> };
>
> + tsens0: tsens@c222000 {
Oops, sending out v6 to fix this.
> + compatible = "qcom,sdm845-tsens", "qcom,tsens-v2";
> + reg = <0xc263000 0x1ff>, /* TM */
> + <0xc222000 0x1ff>; /* SROT */
> + #qcom,sensors = <13>;
> + #thermal-sensor-cells = <1>;
> + };
> +
> + tsens1: tsens@c223000 {
> + compatible = "qcom,sdm845-tsens", "qcom,tsens-v2";
> + reg = <0xc265000 0x1ff>, /* TM */
> + <0xc223000 0x1ff>; /* SROT */
> + #qcom,sensors = <8>;
> + #thermal-sensor-cells = <1>;
> + };
> +
> spmi_bus: spmi@c440000 {
> compatible = "qcom,spmi-pmic-arb";
> reg = <0xc440000 0x1100>,
> --
> 2.7.4
>