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SubjectRe: [PATCH v4 2/3] thermal: qcom: tse ns-v1: Use GENMASK macro for bitmasks


On 28 June 2022 17:23:58 GMT+03:00, Konrad Dybcio <konrad.dybcio@somainline.org> wrote:
>Convert the masks to use GENMASK. Tested by objdumping and making sure
>the output is identical pre- and post this patch.
>
>Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
>---
>Changes since v3:
>* Add this patch
>
> drivers/thermal/qcom/tsens-v1.c | 107 ++++++++++++++++----------------
> 1 file changed, 54 insertions(+), 53 deletions(-)
>
>diff --git a/drivers/thermal/qcom/tsens-v1.c b/drivers/thermal/qcom/tsens-v1.c
>index 573e261ccca7..d6f0dec4bfa1 100644
>--- a/drivers/thermal/qcom/tsens-v1.c
>+++ b/drivers/thermal/qcom/tsens-v1.c
>@@ -3,6 +3,7 @@
> * Copyright (c) 2019, Linaro Limited
> */
>
>+#include <linux/bits.h>
> #include <linux/bitops.h>
> #include <linux/regmap.h>
> #include <linux/delay.h>
>@@ -22,34 +23,34 @@
> #define TM_HIGH_LOW_Sn_INT_THRESHOLD_OFF 0x0090
>
> /* eeprom layout data for msm8956/76 (v1) */
>-#define MSM8976_BASE0_MASK 0xff
>-#define MSM8976_BASE1_MASK 0xff
>+#define MSM8976_BASE0_MASK GENMASK(7, 0)
>+#define MSM8976_BASE1_MASK GENMASK(7, 0)
> #define MSM8976_BASE1_SHIFT 8

Hmm. Is the BASE1_MASK correct? Should it be 0xff00 instead?
(Yes, it's not a mistake in your patch, but let's make sure it is not a mistake).

>
>-#define MSM8976_S0_P1_MASK 0x3f00
>-#define MSM8976_S1_P1_MASK 0x3f00000
>-#define MSM8976_S2_P1_MASK 0x3f
>-#define MSM8976_S3_P1_MASK 0x3f000
>-#define MSM8976_S4_P1_MASK 0x3f00
>-#define MSM8976_S5_P1_MASK 0x3f00000
>-#define MSM8976_S6_P1_MASK 0x3f
>-#define MSM8976_S7_P1_MASK 0x3f000
>-#define MSM8976_S8_P1_MASK 0x1f8
>-#define MSM8976_S9_P1_MASK 0x1f8000
>-#define MSM8976_S10_P1_MASK 0xf8000000
>-#define MSM8976_S10_P1_MASK_1 0x1
>-
>-#define MSM8976_S0_P2_MASK 0xfc000
>-#define MSM8976_S1_P2_MASK 0xfc000000
>-#define MSM8976_S2_P2_MASK 0xfc0
>-#define MSM8976_S3_P2_MASK 0xfc0000
>-#define MSM8976_S4_P2_MASK 0xfc000
>-#define MSM8976_S5_P2_MASK 0xfc000000
>-#define MSM8976_S6_P2_MASK 0xfc0
>-#define MSM8976_S7_P2_MASK 0xfc0000
>-#define MSM8976_S8_P2_MASK 0x7e00
>-#define MSM8976_S9_P2_MASK 0x7e00000
>-#define MSM8976_S10_P2_MASK 0x7e
>+#define MSM8976_S0_P1_MASK GENMASK(13, 8)

I was thinking about:

#define MSM8976_MASK(shift) GENMASK((shift) + 5, (shift))
#define MSM8976_S1_P1_MASK MSM8976_MASK(MSM8976_S0_P1_SHIFT)

But... While you are reworking this driver, could you please replace mask+shift statements with the FIELD_GET / FIELD_PREP?
There is a huge chance that we can drop _SHIFT completely and just use newly defined masks from this patch.

>+#define MSM8976_S1_P1_MASK GENMASK(25, 20)
>+#define MSM8976_S2_P1_MASK GENMASK(5, 0)
>+#define MSM8976_S3_P1_MASK GENMASK(17, 12)
>+#define MSM8976_S4_P1_MASK GENMASK(13, 8)
>+#define MSM8976_S5_P1_MASK GENMASK(25, 20)
>+#define MSM8976_S6_P1_MASK GENMASK(5, 0)
>+#define MSM8976_S7_P1_MASK GENMASK(17, 12)
>+#define MSM8976_S8_P1_MASK GENMASK(8, 3)
>+#define MSM8976_S9_P1_MASK GENMASK(20, 15)
>+#define MSM8976_S10_P1_MASK GENMASK(31, 27)
>+#define MSM8976_S10_P1_MASK_1 GENMASK(0, 0)
>+
>+#define MSM8976_S0_P2_MASK GENMASK(19, 14)
>+#define MSM8976_S1_P2_MASK GENMASK(31, 26)
>+#define MSM8976_S2_P2_MASK GENMASK(11, 6)
>+#define MSM8976_S3_P2_MASK GENMASK(23, 18)
>+#define MSM8976_S4_P2_MASK GENMASK(19, 14)
>+#define MSM8976_S5_P2_MASK GENMASK(31, 26)
>+#define MSM8976_S6_P2_MASK GENMASK(11, 6)
>+#define MSM8976_S7_P2_MASK GENMASK(23, 18)
>+#define MSM8976_S8_P2_MASK GENMASK(14, 9)
>+#define MSM8976_S9_P2_MASK GENMASK(26, 21)
>+#define MSM8976_S10_P2_MASK GENMASK(6, 1)
>
> #define MSM8976_S0_P1_SHIFT 8
> #define MSM8976_S1_P1_SHIFT 20
>@@ -76,7 +77,7 @@
> #define MSM8976_S9_P2_SHIFT 21
> #define MSM8976_S10_P2_SHIFT 1
>
>-#define MSM8976_CAL_SEL_MASK 0x3
>+#define MSM8976_CAL_SEL_MASK GENMASK(1, 0)
>
> #define MSM8976_CAL_DEGC_PT1 30
> #define MSM8976_CAL_DEGC_PT2 120
>@@ -84,34 +85,34 @@
> #define MSM8976_SLOPE_DEFAULT 3200
>
> /* eeprom layout data for qcs404/405 (v1) */
>-#define BASE0_MASK 0x000007f8
>-#define BASE1_MASK 0x0007f800
>+#define BASE0_MASK GENMASK(10, 3)
>+#define BASE1_MASK GENMASK(18, 11)
> #define BASE0_SHIFT 3
> #define BASE1_SHIFT 11
>
>-#define S0_P1_MASK 0x0000003f
>-#define S1_P1_MASK 0x0003f000
>-#define S2_P1_MASK 0x3f000000
>-#define S3_P1_MASK 0x000003f0
>-#define S4_P1_MASK 0x003f0000
>-#define S5_P1_MASK 0x0000003f
>-#define S6_P1_MASK 0x0003f000
>-#define S7_P1_MASK 0x3f000000
>-#define S8_P1_MASK 0x000003f0
>-#define S9_P1_MASK 0x003f0000
>-
>-#define S0_P2_MASK 0x00000fc0
>-#define S1_P2_MASK 0x00fc0000
>-#define S2_P2_MASK_1_0 0xc0000000
>-#define S2_P2_MASK_5_2 0x0000000f
>-#define S3_P2_MASK 0x0000fc00
>-#define S4_P2_MASK 0x0fc00000
>-#define S5_P2_MASK 0x00000fc0
>-#define S6_P2_MASK 0x00fc0000
>-#define S7_P2_MASK_1_0 0xc0000000
>-#define S7_P2_MASK_5_2 0x0000000f
>-#define S8_P2_MASK 0x0000fc00
>-#define S9_P2_MASK 0x0fc00000
>+#define S0_P1_MASK GENMASK(5, 0)
>+#define S1_P1_MASK GENMASK(17, 12)
>+#define S2_P1_MASK GENMASK(29, 24)
>+#define S3_P1_MASK GENMASK(9, 4)
>+#define S4_P1_MASK GENMASK(21, 16)
>+#define S5_P1_MASK GENMASK(5, 0)
>+#define S6_P1_MASK GENMASK(17, 12)
>+#define S7_P1_MASK GENMASK(29, 24)
>+#define S8_P1_MASK GENMASK(9, 4)
>+#define S9_P1_MASK GENMASK(21, 16)
>+
>+#define S0_P2_MASK GENMASK(11, 6)
>+#define S1_P2_MASK GENMASK(23, 18)
>+#define S2_P2_MASK_1_0 GENMASK(31, 30)
>+#define S2_P2_MASK_5_2 GENMASK(3, 0)
>+#define S3_P2_MASK GENMASK(15, 10)
>+#define S4_P2_MASK GENMASK(27, 22)
>+#define S5_P2_MASK GENMASK(11, 6)
>+#define S6_P2_MASK GENMASK(23, 18)
>+#define S7_P2_MASK_1_0 GENMASK(31, 30)
>+#define S7_P2_MASK_5_2 GENMASK(3, 0)
>+#define S8_P2_MASK GENMASK(15, 10)
>+#define S9_P2_MASK GENMASK(27, 22)
>
> #define S0_P1_SHIFT 0
> #define S0_P2_SHIFT 6
>@@ -139,7 +140,7 @@
> #define S9_P1_SHIFT 16
> #define S9_P2_SHIFT 22
>
>-#define CAL_SEL_MASK 7
>+#define CAL_SEL_MASK GENMASK(2, 0)
> #define CAL_SEL_SHIFT 0
>
> static void compute_intercept_slope_8976(struct tsens_priv *priv,

--
With best wishes
Dmitry

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