linux-kernel - [PATCH 26/48] input: touchscreen: mainstone: fix pxa2xx+pxa3xx configuration

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Date:   Tue, 19 Apr 2022 18:37:48 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     robert.jarzmik@...e.fr, linux-arm-kernel@...ts.infradead.org
Cc:     Arnd Bergmann <arnd@...db.de>, Daniel Mack <daniel@...que.org>,
        Haojian Zhuang <haojian.zhuang@...il.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Philipp Zabel <philipp.zabel@...il.com>,
        Lubomir Rintel <lkundrak@...sk>,
        Paul Parsons <lost.distance@...oo.com>,
        Tomas Cech <sleep_walker@...e.com>,
        Sergey Lapin <slapin@...fans.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        Helge Deller <deller@....de>, Mark Brown <broonie@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org,
        linux-ide@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-input@...r.kernel.org,
        patches@...nsource.cirrus.com, linux-leds@...r.kernel.org,
        linux-mmc@...r.kernel.org, linux-mtd@...ts.infradead.org,
        linux-rtc@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        alsa-devel@...a-project.org
Subject: [PATCH 26/48] input: touchscreen: mainstone: fix pxa2xx+pxa3xx configuration

From: Arnd Bergmann <arnd@...db.de>

There are two different ways of flushing the ac97 queue
in this driver, selected by a compile time option.

Change this to a runtime selection to make it work when both
are enabled.

Acked-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
Acked-by: Robert Jarzmik <robert.jarzmik@...e.fr>
Cc: linux-input@...r.kernel.org
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/input/touchscreen/mainstone-wm97xx.c | 19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

diff --git a/drivers/input/touchscreen/mainstone-wm97xx.c b/drivers/input/touchscreen/mainstone-wm97xx.c
index 87655105ef3a..618c80847d9f 100644
--- a/drivers/input/touchscreen/mainstone-wm97xx.c
+++ b/drivers/input/touchscreen/mainstone-wm97xx.c
@@ -98,25 +98,20 @@ MODULE_PARM_DESC(ac97_touch_slot, "Touch screen data slot AC97 number");
 
 
 /* flush AC97 slot 5 FIFO on pxa machines */
-#ifdef CONFIG_PXA27x
-static void wm97xx_acc_pen_up(struct wm97xx *wm)
-{
-	schedule_timeout_uninterruptible(1);
-
-	while (MISR & (1 << 2))
-		MODR;
-}
-#else
 static void wm97xx_acc_pen_up(struct wm97xx *wm)
 {
 	unsigned int count;
 
 	schedule_timeout_uninterruptible(1);
 
-	for (count = 0; count < 16; count++)
-		MODR;
+	if (cpu_is_pxa27x()) {
+		while (MISR & (1 << 2))
+			MODR;
+	} else if (cpu_is_pxa3xx()) {
+		for (count = 0; count < 16; count++)
+			MODR;
+	}
 }
-#endif
 
 static int wm97xx_acc_pen_down(struct wm97xx *wm)
 {
-- 
2.29.2