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SubjectRe: [PATCH v2 08/11] thermal: tsens: Check if the IP is correctly enabled by firmware
On Thu 30 Aug 12:23 PDT 2018, Amit Kucheria wrote:

> On Tue, Aug 28, 2018 at 7:08 PM, Amit Kucheria <amit.kucheria@linaro.org> wrote:
> > The SROT registers are initialised by the secure firmware at boot. We
> > don't have write access to the registers. Check if the block is enabled
> > before continuing.
> >
> > Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
> > Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
> > ---
> > drivers/thermal/qcom/tsens-common.c | 17 +++++++++++++++++
> > 1 file changed, 17 insertions(+)
> >
> > diff --git a/drivers/thermal/qcom/tsens-common.c b/drivers/thermal/qcom/tsens-common.c
> > index 0b8a793f15f4..d250b757d1f0 100644
> > --- a/drivers/thermal/qcom/tsens-common.c
> > +++ b/drivers/thermal/qcom/tsens-common.c
> > @@ -12,6 +12,11 @@
> > #include <linux/regmap.h>
> > #include "tsens.h"
> >
> > +/* SROT */
> > +#define CTRL_OFFSET 0x4
>
> This OFFSET is not constant across the TSENS family and breaks atleast
> one platform in the test below. I have a patch to fix this for all
> platforms, will post it after a bit more testing.
>

Afaict the other 10 patches can be merged independently of this patch.

So please make the minor updates and resend them as a separate series,
with the acks/reviews, to make it easier for Eduardo to just pick them.

Regards,
Bjorn

>
> > +#define TSENS_EN BIT(0)
> > +
> > +/* TM */
> > #define STATUS_OFFSET 0x30
> > #define SN_ADDR_OFFSET 0x4
> > #define SN_ST_TEMP_MASK 0x3ff
> > @@ -119,6 +124,8 @@ int __init init_common(struct tsens_device *tmdev)
> > {
> > void __iomem *tm_base, *srot_base;
> > struct resource *res;
> > + u32 code;
> > + int ret;
> > struct platform_device *op = of_find_device_by_node(tmdev->dev->of_node);
> >
> > if (!op)
> > @@ -151,5 +158,15 @@ int __init init_common(struct tsens_device *tmdev)
> > if (IS_ERR(tmdev->tm_map))
> > return PTR_ERR(tmdev->tm_map);
> >
> > + if (tmdev->srot_map) {
> > + ret = regmap_read(tmdev->srot_map, CTRL_OFFSET, &code);
> > + if (ret)
> > + return ret;
> > + if (!(code & TSENS_EN)) {
> > + dev_err(tmdev->dev, "tsens device is not enabled\n");
> > + return -ENODEV;
> > + }
> > + }
> > +
> > return 0;
> > }
> > --
> > 2.17.1
> >

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