[PATCH 28/46] input: touchscreen: mainstone: sync with zylonite driver

Arnd Bergmann
2019-10-18T15:44:07Z

The two drivers are almost identical and can work on a variety
of hardware in principle. The mainstone driver supports additional
hardware, and the zylonite driver has a few cleanup patches.

Sync the two by adding the zylonite changes into the mainstone
one, and checking for the zylonite board to order to keep the
default behavior (interrupt enabled) there.

Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: linux-input@vger.kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/input/touchscreen/mainstone-wm97xx.c | 59 ++++++++++----------
1 file changed, 31 insertions(+), 28 deletions(-)

diff --git a/drivers/input/touchscreen/mainstone-wm97xx.c b/drivers/input/touchscreen/mainstone-wm97xx.c
index 618c80847d9f..940d3c92b1f8 100644
--- a/drivers/input/touchscreen/mainstone-wm97xx.c
+++ b/drivers/input/touchscreen/mainstone-wm97xx.c
@@ -24,9 +24,9 @@
#include <linux/gpio/consumer.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
-#include <linux/wm97xx.h>
#include <linux/io.h>
-#include <linux/gpio.h>
+#include <linux/soc/pxa/cpu.h>
+#include <linux/wm97xx.h>

#include <mach/regs-ac97.h>

@@ -42,23 +42,22 @@ struct continuous {
#define WM_READS(sp) ((sp / HZ) + 1)

static const struct continuous cinfo[] = {
- {WM9705_ID2, 0, WM_READS(94), 94},
- {WM9705_ID2, 1, WM_READS(188), 188},
- {WM9705_ID2, 2, WM_READS(375), 375},
- {WM9705_ID2, 3, WM_READS(750), 750},
- {WM9712_ID2, 0, WM_READS(94), 94},
- {WM9712_ID2, 1, WM_READS(188), 188},
- {WM9712_ID2, 2, WM_READS(375), 375},
- {WM9712_ID2, 3, WM_READS(750), 750},
- {WM9713_ID2, 0, WM_READS(94), 94},
- {WM9713_ID2, 1, WM_READS(120), 120},
- {WM9713_ID2, 2, WM_READS(154), 154},
- {WM9713_ID2, 3, WM_READS(188), 188},
+ { WM9705_ID2, 0, WM_READS(94), 94 },
+ { WM9705_ID2, 1, WM_READS(188), 188 },
+ { WM9705_ID2, 2, WM_READS(375), 375 },
+ { WM9705_ID2, 3, WM_READS(750), 750 },
+ { WM9712_ID2, 0, WM_READS(94), 94 },
+ { WM9712_ID2, 1, WM_READS(188), 188 },
+ { WM9712_ID2, 2, WM_READS(375), 375 },
+ { WM9712_ID2, 3, WM_READS(750), 750 },
+ { WM9713_ID2, 0, WM_READS(94), 94 },
+ { WM9713_ID2, 1, WM_READS(120), 120 },
+ { WM9713_ID2, 2, WM_READS(154), 154 },
+ { WM9713_ID2, 3, WM_READS(188), 188 },
};

/* continuous speed index */
static int sp_idx;
-static u16 last, tries;
static struct gpio_desc *gpiod_irq;

/*
@@ -102,7 +101,7 @@ static void wm97xx_acc_pen_up(struct wm97xx *wm)
{
unsigned int count;

- schedule_timeout_uninterruptible(1);
+ msleep(1);

if (cpu_is_pxa27x()) {
while (MISR & (1 << 2))
@@ -117,13 +116,14 @@ static int wm97xx_acc_pen_down(struct wm97xx *wm)
{
u16 x, y, p = 0x100 | WM97XX_ADCSEL_PRES;
int reads = 0;
+ static u16 last, tries;

/* When the AC97 queue has been drained we need to allow time
* to buffer up samples otherwise we end up spinning polling
* for samples. The controller can't have a suitably low
* threshold set to use the notifications it gives.
*/
- schedule_timeout_uninterruptible(1);
+ msleep(1);

if (tries > 5) {
tries = 0;
@@ -193,6 +193,8 @@ static int wm97xx_acc_startup(struct wm97xx *wm)
/* There is some obscure mutant of WM9712 interbred with WM9713
* used on Palm HW */
wm->variant = WM97xx_WM1613;
+ } else if (machine_is_zylonite()) {
+ pen_int = 1;
}

if (pen_int) {
@@ -253,13 +255,13 @@ static void wm97xx_irq_enable(struct wm97xx *wm, int enable)
}

static struct wm97xx_mach_ops mainstone_mach_ops = {
- .acc_enabled = 1,
- .acc_pen_up = wm97xx_acc_pen_up,
- .acc_pen_down = wm97xx_acc_pen_down,
- .acc_startup = wm97xx_acc_startup,
- .acc_shutdown = wm97xx_acc_shutdown,
- .irq_enable = wm97xx_irq_enable,
- .irq_gpio = WM97XX_GPIO_2,
+ .acc_enabled = 1,
+ .acc_pen_up = wm97xx_acc_pen_up,
+ .acc_pen_down = wm97xx_acc_pen_down,
+ .acc_startup = wm97xx_acc_startup,
+ .acc_shutdown = wm97xx_acc_shutdown,
+ .irq_enable = wm97xx_irq_enable,
+ .irq_gpio = WM97XX_GPIO_2,
};

static int mainstone_wm97xx_probe(struct platform_device *pdev)
@@ -274,14 +276,15 @@ static int mainstone_wm97xx_remove(struct platform_device *pdev)
struct wm97xx *wm = platform_get_drvdata(pdev);

wm97xx_unregister_mach_ops(wm);
+
return 0;
}

static struct platform_driver mainstone_wm97xx_driver = {
- .probe = mainstone_wm97xx_probe,
- .remove = mainstone_wm97xx_remove,
- .driver = {
- .name = "wm97xx-touch",
+ .probe = mainstone_wm97xx_probe,
+ .remove = mainstone_wm97xx_remove,
+ .driver = {
+ .name = "wm97xx-touch",
},
};
module_platform_driver(mainstone_wm97xx_driver);
--
2.20.0