linux-kernel - [PATCH v1 9/9] pwm: lpss: Allow other drivers to enable PWM LPSS

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Date:   Tue,  6 Sep 2022 22:57:35 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-kernel@...r.kernel.org, linux-pwm@...r.kernel.org
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
Subject: [PATCH v1 9/9] pwm: lpss: Allow other drivers to enable PWM LPSS

The PWM LPSS device can be embedded in another device.
In order to enable it, allow that drivers to probe
a corresponding device.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/pwm/pwm-lpss.h                     | 26 ++---------------
 include/linux/platform_data/x86/pwm-lpss.h | 33 ++++++++++++++++++++++
 2 files changed, 35 insertions(+), 24 deletions(-)
 create mode 100644 include/linux/platform_data/x86/pwm-lpss.h

diff --git a/drivers/pwm/pwm-lpss.h b/drivers/pwm/pwm-lpss.h
index 35e570067fc6..41cb4b6246bb 100644
--- a/drivers/pwm/pwm-lpss.h
+++ b/drivers/pwm/pwm-lpss.h
@@ -13,11 +13,9 @@
 #include <linux/pwm.h>
 #include <linux/types.h>
 
-#define MAX_PWMS			4
-
-struct device;
+#include <linux/platform_data/x86/pwm-lpss.h>
 
-struct pwm_lpss_boardinfo;
+#define MAX_PWMS			4
 
 struct pwm_lpss_chip {
 	struct pwm_chip chip;
@@ -25,23 +23,6 @@ struct pwm_lpss_chip {
 	const struct pwm_lpss_boardinfo *info;
 };
 
-struct pwm_lpss_boardinfo {
-	unsigned long clk_rate;
-	unsigned int npwm;
-	unsigned long base_unit_bits;
-	/*
-	 * Some versions of the IP may stuck in the state machine if enable
-	 * bit is not set, and hence update bit will show busy status till
-	 * the reset. For the rest it may be otherwise.
-	 */
-	bool bypass;
-	/*
-	 * On some devices the _PS0/_PS3 AML code of the GPU (GFX0) device
-	 * messes with the PWM0 controllers state,
-	 */
-	bool other_devices_aml_touches_pwm_regs;
-};
-
 /* BayTrail */
 static __maybe_unused const struct pwm_lpss_boardinfo pwm_lpss_byt_info = {
 	.clk_rate = 25000000,
@@ -72,7 +53,4 @@ static __maybe_unused const struct pwm_lpss_boardinfo pwm_lpss_tng_info = {
 	.base_unit_bits = 22,
 };
 
-struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, void __iomem *base,
-				     const struct pwm_lpss_boardinfo *info);
-
 #endif	/* __PWM_LPSS_H */
diff --git a/include/linux/platform_data/x86/pwm-lpss.h b/include/linux/platform_data/x86/pwm-lpss.h
new file mode 100644
index 000000000000..296bd837ddbb
--- /dev/null
+++ b/include/linux/platform_data/x86/pwm-lpss.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Intel Low Power Subsystem PWM controller driver */
+
+#ifndef __PLATFORM_DATA_X86_PWM_LPSS_H
+#define __PLATFORM_DATA_X86_PWM_LPSS_H
+
+#include <linux/types.h>
+
+struct device;
+
+struct pwm_lpss_chip;
+
+struct pwm_lpss_boardinfo {
+	unsigned long clk_rate;
+	unsigned int npwm;
+	unsigned long base_unit_bits;
+	/*
+	 * Some versions of the IP may stuck in the state machine if enable
+	 * bit is not set, and hence update bit will show busy status till
+	 * the reset. For the rest it may be otherwise.
+	 */
+	bool bypass;
+	/*
+	 * On some devices the _PS0/_PS3 AML code of the GPU (GFX0) device
+	 * messes with the PWM0 controllers state,
+	 */
+	bool other_devices_aml_touches_pwm_regs;
+};
+
+struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, void __iomem *base,
+				     const struct pwm_lpss_boardinfo *info);
+
+#endif	/* __PLATFORM_DATA_X86_PWM_LPSS_H */
-- 
2.35.1