On Thu, Jul 12, 2018 at 02:09:03PM +0530, Amit Kucheria wrote:
> 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@xxxxxxxxxx>
> Reviewed-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
> Tested-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
> ---
> drivers/thermal/qcom/tsens-8996.c | 4 ++--
> drivers/thermal/qcom/tsens-common.c | 12 ++++++++++++
> drivers/thermal/qcom/tsens.h | 1 +
> 3 files changed, 15 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/thermal/qcom/tsens-8996.c b/drivers/thermal/qcom/tsens-8996.c
> index e1f7781..3e60cec 100644
> --- a/drivers/thermal/qcom/tsens-8996.c
> +++ b/drivers/thermal/qcom/tsens-8996.c
> @@ -16,7 +16,7 @@
> #include <linux/regmap.h>
> #include "tsens.h"
>
> -#define STATUS_OFFSET 0x10a0
> +#define STATUS_OFFSET 0xa0
> #define LAST_TEMP_MASK 0xfff
> #define STATUS_VALID_BIT BIT(21)
> #define CODE_SIGN_BIT BIT(11)
> @@ -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..c22dc18 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;
> + }
nit: no curly braces for conditionals with a single statement. There
is probably no need to respin just for this though.
Reviewed-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
--
To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
