[PATCH 29/46] Input: touchscreen: use wrapper for pxa2xx ac97 registers

Arnd Bergmann
2019-10-18T15:44:35Z

To avoid a dependency on the pxa platform header files with
hardcoded registers, change the driver to call a wrapper
in the pxa2xx-ac97-lib that encapsulates all the other
ac97 stuff.

Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: linux-input@vger.kernel.org
Cc: alsa-devel@alsa-project.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/input/touchscreen/Kconfig | 2 ++
drivers/input/touchscreen/mainstone-wm97xx.c | 16 ++++++++--------
drivers/input/touchscreen/zylonite-wm97xx.c | 12 ++++++------
include/sound/pxa2xx-lib.h | 4 ++++
sound/arm/pxa2xx-ac97-lib.c | 12 ++++++++++++
5 files changed, 32 insertions(+), 14 deletions(-)

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 46ad9090493b..c60199550d89 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -848,6 +848,7 @@ config TOUCHSCREEN_WM9713
config TOUCHSCREEN_WM97XX_MAINSTONE
tristate "WM97xx Mainstone/Palm accelerated touch"
depends on TOUCHSCREEN_WM97XX && ARCH_PXA
+ depends on SND_PXA2XX_LIB_AC97
help
Say Y here for support for streaming mode with WM97xx touchscreens
on Mainstone, Palm Tungsten T5, TX and LifeDrive systems.
@@ -860,6 +861,7 @@ config TOUCHSCREEN_WM97XX_MAINSTONE
config TOUCHSCREEN_WM97XX_ZYLONITE
tristate "Zylonite accelerated touch"
depends on TOUCHSCREEN_WM97XX && MACH_ZYLONITE
+ depends on SND_PXA2XX_LIB_AC97
select TOUCHSCREEN_WM9713
help
Say Y here for support for streaming mode with the touchscreen
diff --git a/drivers/input/touchscreen/mainstone-wm97xx.c b/drivers/input/touchscreen/mainstone-wm97xx.c
index 940d3c92b1f8..8f6fe68f1f99 100644
--- a/drivers/input/touchscreen/mainstone-wm97xx.c
+++ b/drivers/input/touchscreen/mainstone-wm97xx.c
@@ -28,7 +28,7 @@
#include <linux/soc/pxa/cpu.h>
#include <linux/wm97xx.h>

-#include <mach/regs-ac97.h>
+#include <sound/pxa2xx-lib.h>

#include <asm/mach-types.h>

@@ -104,11 +104,11 @@ static void wm97xx_acc_pen_up(struct wm97xx *wm)
msleep(1);

if (cpu_is_pxa27x()) {
- while (MISR & (1 << 2))
- MODR;
+ while (pxa2xx_ac97_read_misr() & (1 << 2))
+ pxa2xx_ac97_read_modr();
} else if (cpu_is_pxa3xx()) {
for (count = 0; count < 16; count++)
- MODR;
+ pxa2xx_ac97_read_modr();
}
}

@@ -130,7 +130,7 @@ static int wm97xx_acc_pen_down(struct wm97xx *wm)
return RC_PENUP;
}

- x = MODR;
+ x = pxa2xx_ac97_read_modr();
if (x == last) {
tries++;
return RC_AGAIN;
@@ -138,10 +138,10 @@ static int wm97xx_acc_pen_down(struct wm97xx *wm)
last = x;
do {
if (reads)
- x = MODR;
- y = MODR;
+ x = pxa2xx_ac97_read_modr();
+ y = pxa2xx_ac97_read_modr();
if (pressure)
- p = MODR;
+ p = pxa2xx_ac97_read_modr();

dev_dbg(wm->dev, "Raw coordinates: x=%x, y=%x, p=%x\n",
x, y, p);
diff --git a/drivers/input/touchscreen/zylonite-wm97xx.c b/drivers/input/touchscreen/zylonite-wm97xx.c
index cabdd6e3c6f8..ed7eae638713 100644
--- a/drivers/input/touchscreen/zylonite-wm97xx.c
+++ b/drivers/input/touchscreen/zylonite-wm97xx.c
@@ -24,7 +24,7 @@
#include <linux/soc/pxa/cpu.h>
#include <linux/wm97xx.h>

-#include <mach/regs-ac97.h>
+#include <sound/pxa2xx-lib.h>

struct continuous {
u16 id; /* codec id */
@@ -79,7 +79,7 @@ static void wm97xx_acc_pen_up(struct wm97xx *wm)
msleep(1);

for (i = 0; i < 16; i++)
- MODR;
+ pxa2xx_ac97_read_modr();
}

static int wm97xx_acc_pen_down(struct wm97xx *wm)
@@ -100,7 +100,7 @@ static int wm97xx_acc_pen_down(struct wm97xx *wm)
return RC_PENUP;
}

- x = MODR;
+ x = pxa2xx_ac97_read_modr();
if (x == last) {
tries++;
return RC_AGAIN;
@@ -108,10 +108,10 @@ static int wm97xx_acc_pen_down(struct wm97xx *wm)
last = x;
do {
if (reads)
- x = MODR;
- y = MODR;
+ x = pxa2xx_ac97_read_modr();
+ y = pxa2xx_ac97_read_modr();
if (pressure)
- p = MODR;
+ p = pxa2xx_ac97_read_modr();

dev_dbg(wm->dev, "Raw coordinates: x=%x, y=%x, p=%x\n",
x, y, p);
diff --git a/include/sound/pxa2xx-lib.h b/include/sound/pxa2xx-lib.h
index 6758fc12fa84..79c32a8f4c91 100644
--- a/include/sound/pxa2xx-lib.h
+++ b/include/sound/pxa2xx-lib.h
@@ -41,4 +41,8 @@ extern int pxa2xx_ac97_hw_resume(void);
extern int pxa2xx_ac97_hw_probe(struct platform_device *dev);
extern void pxa2xx_ac97_hw_remove(struct platform_device *dev);

+/* modem registers, used by touchscreen driver */
+u32 pxa2xx_ac97_read_modr(void);
+u32 pxa2xx_ac97_read_misr(void);
+
#endif
diff --git a/sound/arm/pxa2xx-ac97-lib.c b/sound/arm/pxa2xx-ac97-lib.c
index 8c79d224f03b..572b73d73762 100644
--- a/sound/arm/pxa2xx-ac97-lib.c
+++ b/sound/arm/pxa2xx-ac97-lib.c
@@ -428,6 +428,18 @@ void pxa2xx_ac97_hw_remove(struct platform_device *dev)
}
EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_remove);

+u32 pxa2xx_ac97_read_modr(void)
+{
+ return MODR;
+}
+EXPORT_SYMBOL_GPL(pxa2xx_ac97_read_modr);
+
+u32 pxa2xx_ac97_read_misr(void)
+{
+ return MISR;
+}
+EXPORT_SYMBOL_GPL(pxa2xx_ac97_read_misr);
+
MODULE_AUTHOR("Nicolas Pitre");
MODULE_DESCRIPTION("Intel/Marvell PXA sound library");
MODULE_LICENSE("GPL");
--
2.20.0