linux-kernel - [PATCH v2] pwm: axi-pwmgen: add .max

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Message-ID: <20240711125743.3956935-1-tgamblin@baylibre.com>
Date: Thu, 11 Jul 2024 08:57:42 -0400
From: Trevor Gamblin <tgamblin@...libre.com>
To: Michael Hennerich <michael.hennerich@...log.com>,
	Nuno Sá <nuno.sa@...log.com>,
	Uwe Kleine-König <ukleinek@...nel.org>
Cc: Trevor Gamblin <tgamblin@...libre.com>,
	linux-pwm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2] pwm: axi-pwmgen: add .max_register to regmap

This was missed in the basic driver and is useful for debug, so add it.

Example regmap output before the patch:

|root@...-tg:~# cat /sys/kernel/debug/regmap/44a60000.pwm/registers
|0: 00020100

And with it:

|root@...-tg:~# cat /sys/kernel/debug/regmap/44a60000.pwm/registers
|00: 00020100
|04: 00000000
|08: 00000000
|0c: 601a3471
|10: 00000000
|14: 00000002
|18: 00000001
|1c: 00000000
|...

Signed-off-by: Trevor Gamblin <tgamblin@...libre.com>
---
v2 just adds an example of the effect to the commit log.
---
 drivers/pwm/pwm-axi-pwmgen.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pwm/pwm-axi-pwmgen.c b/drivers/pwm/pwm-axi-pwmgen.c
index aac4f395497b..3ad60edf20a5 100644
--- a/drivers/pwm/pwm-axi-pwmgen.c
+++ b/drivers/pwm/pwm-axi-pwmgen.c
@@ -51,6 +51,7 @@ static const struct regmap_config axi_pwmgen_regmap_config = {
 	.reg_bits = 32,
 	.reg_stride = 4,
 	.val_bits = 32,
+	.max_register = 0xFC,
 };
 
 static int axi_pwmgen_apply(struct pwm_chip *chip, struct pwm_device *pwm,
-- 
2.45.2