linux-kernel - [PATCH v2 4/4] mfd: ti_am335x_tscadc: drop the CNTRLREG_TSC

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Date:   Thu, 25 Nov 2021 23:46:42 +0100
From:   Dario Binacchi <dariobin@...ero.it>
To:     linux-kernel@...r.kernel.org
Cc:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        linux-input@...r.kernel.org, Felipe Balbi <balbi@...com>,
        Zubair Lutfullah <zubair.lutfullah@...il.com>,
        Grygorii Strashko <grygorii.strashko@...com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Dave Gerlach <d-gerlach@...com>,
        "Andrew F . Davis" <afd@...com>, Vignesh R <vigneshr@...com>,
        Lee Jones <lee.jones@...aro.org>,
        Wolfram Sang <wsa@...nel.org>, Brad Griffis <bgriffis@...com>,
        Jeff Lance <j-lance1@...com>, Rachna Patil <rachna@...com>,
        Dario Binacchi <dariobin@...ero.it>
Subject: [PATCH v2 4/4] mfd: ti_am335x_tscadc: drop the CNTRLREG_TSC_8WIRE macro

In TI's reference manual description for the `AFE_Pen_Ctrl' bit-field
of the TSC's CTRL register, there is no mention of 8-wire touchscreens.
Even commit f0933a60d190 ("mfd: ti_am335x_tscadc: Update logic in CTRL
register for 5-wire TS") says that the value of this bit-field must be
the same for 4-wire and 8-wire touchscreens. So let's remove the
CNTRLREG_TSC_8WIRE macro to avoid misunderstandings.

Signed-off-by: Dario Binacchi <dariobin@...ero.it>

---

Changes in v2:
- Replace CNTRLREG_8WIRE with CNTRLREG_TSC_8WIRE. In the meantime, the
  file ti_am335x_tscadc.h has been modified, so the patch must be
  updated.

 include/linux/mfd/ti_am335x_tscadc.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/include/linux/mfd/ti_am335x_tscadc.h b/include/linux/mfd/ti_am335x_tscadc.h
index ba13e043d910..4063b0614d90 100644
--- a/include/linux/mfd/ti_am335x_tscadc.h
+++ b/include/linux/mfd/ti_am335x_tscadc.h
@@ -103,7 +103,6 @@
 #define CNTRLREG_TSC_AFE_CTRL(val) FIELD_PREP(GENMASK(6, 5), (val))
 #define CNTRLREG_TSC_4WIRE	CNTRLREG_TSC_AFE_CTRL(1)
 #define CNTRLREG_TSC_5WIRE	CNTRLREG_TSC_AFE_CTRL(2)
-#define CNTRLREG_TSC_8WIRE	CNTRLREG_TSC_AFE_CTRL(3)
 #define CNTRLREG_TSC_ENB	BIT(7)
 
 /*Control registers bitfields  for MAGADC IP */
-- 
2.17.1