On Wed, Oct 13, 2021 at 1:56 PM Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> wrote: > > Hi Alistair, > > On Sat, Oct 09, 2021 at 09:37:07PM +1000, Alistair Francis wrote: > > To make the code easier to read use macros for the bit masks. > > > > Signed-off-by: Alistair Francis <alistair@xxxxxxxxxxxxx> > > --- > > drivers/input/touchscreen/wacom_i2c.c | 14 ++++++++++---- > > 1 file changed, 10 insertions(+), 4 deletions(-) > > > > diff --git a/drivers/input/touchscreen/wacom_i2c.c b/drivers/input/touchscreen/wacom_i2c.c > > index 8d7267ccc661..6865342db659 100644 > > --- a/drivers/input/touchscreen/wacom_i2c.c > > +++ b/drivers/input/touchscreen/wacom_i2c.c > > @@ -14,6 +14,12 @@ > > #include <linux/interrupt.h> > > #include <asm/unaligned.h> > > > > +// Bitmasks (for data[3]) > > +#define WACOM_TIP_SWITCH_bm (1 << 0) > > +#define WACOM_BARREL_SWITCH_bm (1 << 1) > > +#define WACOM_ERASER_bm (1 << 2) > > +#define WACOM_BARREL_SWITCH_2_bm (1 << 4) > > We have BIT() for that. > > By the way, do you know what is the good name for bit 3? I see it is > being used in: I have this for bit 3: #define WACOM_INVERT_bm (1 << 3) > > if (!wac_i2c->prox) > wac_i2c->tool = (data[3] & 0x0c) ? > BTN_TOOL_RUBBER : BTN_TOOL_PEN; > > wac_i2c->prox = data[3] & WACOM_IN_PROXIMITY; > > 0x0c is (WACOM_ERASER | <something else>). > > Also, I am a bit confused by this code, now that I look at it closer. > Are we saying that the tool type (eraser or something else) is set only > in first packet for contact/touch? I'm not sure, you would have to check with the wacom people. > > > + > > // Registers > > #define WACOM_COMMAND_LSB 0x04 > > #define WACOM_COMMAND_MSB 0x00 > > @@ -110,10 +116,10 @@ static irqreturn_t wacom_i2c_irq(int irq, void *dev_id) > > if (error < 0) > > goto out; > > > > - tsw = data[3] & 0x01; > > - ers = data[3] & 0x04; > > - f1 = data[3] & 0x02; > > - f2 = data[3] & 0x10; > > + tsw = data[3] & WACOM_TIP_SWITCH_bm; > > + ers = data[3] & WACOM_ERASER_bm; > > + f1 = data[3] & WACOM_BARREL_SWITCH_bm; > > + f2 = data[3] & WACOM_BARREL_SWITCH_2_bm; > > x = le16_to_cpup((__le16 *)&data[4]); > > y = le16_to_cpup((__le16 *)&data[6]); > > pressure = le16_to_cpup((__le16 *)&data[8]); > > -- > > 2.31.1 > > > > How about the version of the patch below? Looks good to me! Alistair > > -- > Dmitry > > Input: wacom_i2c - use macros for the bit masks > > From: Alistair Francis <alistair@xxxxxxxxxxxxx> > > To make the code easier to read use macros for the bit masks. > > Signed-off-by: Alistair Francis <alistair@xxxxxxxxxxxxx> > Link: https://lore.kernel.org/r/20211009113707.17568-2-alistair@xxxxxxxxxxxxx > Patchwork-Id: 12547519 > Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> > --- > drivers/input/touchscreen/wacom_i2c.c | 19 ++++++++++++++----- > 1 file changed, 14 insertions(+), 5 deletions(-) > > diff --git a/drivers/input/touchscreen/wacom_i2c.c b/drivers/input/touchscreen/wacom_i2c.c > index 22826c387da5..d3ea9aa8a98c 100644 > --- a/drivers/input/touchscreen/wacom_i2c.c > +++ b/drivers/input/touchscreen/wacom_i2c.c > @@ -6,6 +6,7 @@ > * <tobita.tatsunosuke@xxxxxxxxxxx> > */ > > +#include <linux/bits.h> > #include <linux/module.h> > #include <linux/input.h> > #include <linux/i2c.h> > @@ -14,6 +15,14 @@ > #include <linux/interrupt.h> > #include <asm/unaligned.h> > > +// Bitmasks (for data[3]) > +#define WACOM_TIP_SWITCH BIT(0) > +#define WACOM_BARREL_SWITCH BIT(1) > +#define WACOM_ERASER BIT(2) > +#define WACOM_BARREL_SWITCH_2 BIT(4) > +#define WACOM_IN_PROXIMITY BIT(5) > + > +// Registers > #define WACOM_CMD_QUERY0 0x04 > #define WACOM_CMD_QUERY1 0x00 > #define WACOM_CMD_QUERY2 0x33 > @@ -99,10 +108,10 @@ static irqreturn_t wacom_i2c_irq(int irq, void *dev_id) > if (error < 0) > goto out; > > - tsw = data[3] & 0x01; > - ers = data[3] & 0x04; > - f1 = data[3] & 0x02; > - f2 = data[3] & 0x10; > + tsw = data[3] & WACOM_TIP_SWITCH; > + ers = data[3] & WACOM_ERASER; > + f1 = data[3] & WACOM_BARREL_SWITCH; > + f2 = data[3] & WACOM_BARREL_SWITCH_2; > x = le16_to_cpup((__le16 *)&data[4]); > y = le16_to_cpup((__le16 *)&data[6]); > pressure = le16_to_cpup((__le16 *)&data[8]); > @@ -111,7 +120,7 @@ static irqreturn_t wacom_i2c_irq(int irq, void *dev_id) > wac_i2c->tool = (data[3] & 0x0c) ? > BTN_TOOL_RUBBER : BTN_TOOL_PEN; > > - wac_i2c->prox = data[3] & 0x20; > + wac_i2c->prox = data[3] & WACOM_IN_PROXIMITY; > > input_report_key(input, BTN_TOUCH, tsw || ers); > input_report_key(input, wac_i2c->tool, wac_i2c->prox);
