diff mbox series

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

Message ID 20191018154201.1276638-28-arnd@arndb.de (mailing list archive)
State New, archived
Headers show
Series ARM: pxa: towards multiplatform support | expand

Commit Message

Arnd Bergmann Oct. 18, 2019, 3:41 p.m. UTC 
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(-)

Comments

Dmitry Torokhov Oct. 18, 2019, 6:41 p.m. UTC | #1 
On Fri, Oct 18, 2019 at 05:41:43PM +0200, Arnd Bergmann wrote:
> 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>

Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Robert Jarzmik Oct. 28, 2019, 9:40 p.m. UTC | #2 
Arnd Bergmann <arnd@arndb.de> writes:

> +	} else if (machine_is_zylonite()) {
> +		pen_int = 1;
>  	}
I don't understand that part, why do you check for a zylonite board in this file
?

Cheers.

--
Robert
Arnd Bergmann April 19, 2022, 3:51 p.m. UTC | #3 
On Mon, Oct 28, 2019 at 10:41 PM Robert Jarzmik <robert.jarzmik@free.fr> wrote:
>
> Arnd Bergmann <arnd@arndb.de> writes:
>
> > +     } else if (machine_is_zylonite()) {
> > +             pen_int = 1;
> >       }
> I don't understand that part, why do you check for a zylonite board in this file
> ?
>

Revisiting another old patch. The reason here is that both the zylonite and
mainstone drivers are for the same hardware, using the same "wm97xx-touch"
platform_driver name, which means that we cannot have them both built
in the same kernel on a multiplatform machine.

By making the mainstone driver deal with zylonite hardware, we can
ensure that this driver works on all the relevant machines. I'm fairly sure
my plan was to later remove the zylonite driver entirely, but for some reason
I did not include a patch for that in my series.

We can probably do that as a follow-up later.

       Arnd
diff mbox series

Patch

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);