diff options
| author | Amit Kucheria | 2018-07-18 08:43:09 +0200 |
|---|---|---|
| committer | Eduardo Valentin | 2018-07-28 00:02:37 +0200 |
| commit | 5b1283984fa39933e094d237387ad8fd39527fc1 (patch) | |
| tree | 3b31d82ac01f3dc19762318878caa8aa78008263 /drivers/thermal/qcom/tsens-common.c | |
| parent | dt: thermal: tsens: Document the fallback DT property for v2 of TSENS IP (diff) | |
| download | kernel-qcow2-linux-5b1283984fa39933e094d237387ad8fd39527fc1.tar.gz kernel-qcow2-linux-5b1283984fa39933e094d237387ad8fd39527fc1.tar.xz kernel-qcow2-linux-5b1283984fa39933e094d237387ad8fd39527fc1.zip | |
thermal: tsens: Add support to split up register address space into two
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.
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 <amit.kucheria@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Tested-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Diffstat (limited to 'drivers/thermal/qcom/tsens-common.c')
| -rw-r--r-- | drivers/thermal/qcom/tsens-common.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/thermal/qcom/tsens-common.c b/drivers/thermal/qcom/tsens-common.c index b1449ad67fc0..c22dc18c7c65 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 +127,22 @@ 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; + /* The driver only uses the TM register address space for now */ + 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); |