pwm: ep93xx: add DT support for Cirrus EP93xx

Add OF ID match table.

Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
Tested-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Tested-by: Michael Peters <mpeters@embeddedTS.com>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Kris Bahnsen <kris@embeddedTS.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Acked-by: Damien Le Moal <dlemoal@kernel.org>
Acked-by: Sebastian Reichel <sre@kernel.org>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

drivers/pwm/pwm-ep93xx.c

@@ -17,6 +17,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/mod_devicetable.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/clk.h>
@@ -188,9 +189,16 @@ static int ep93xx_pwm_probe(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct of_device_id ep93xx_pwm_of_ids[] = {
+	{ .compatible = "cirrus,ep9301-pwm" },
+	{ /* sentinel */}
+};
+MODULE_DEVICE_TABLE(of, ep93xx_pwm_of_ids);
+
 static struct platform_driver ep93xx_pwm_driver = {
 	.driver = {
 		.name = "ep93xx-pwm",
+		.of_match_table = ep93xx_pwm_of_ids,
 	},
 	.probe = ep93xx_pwm_probe,
 };