linux-kernel - [PATCH v5 4/7] pwm: lpss: Allow other drivers to enable PWM LPSS

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Message-Id: <20221117110806.65470-5-andriy.shevchenko@linux.intel.com>
Date:   Thu, 17 Nov 2022 13:08:03 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Hans de Goede <hdegoede@...hat.com>,
        Thierry Reding <thierry.reding@...il.com>,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-pwm@...r.kernel.org
Cc:     Andy Shevchenko <andy@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH v5 4/7] 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>
Acked-by: Thierry Reding <thierry.reding@...il.com>
Reviewed-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@...hat.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
---
 drivers/pwm/pwm-lpss.h                        | 22 +--------------
 .../linux/platform_data/x86}/pwm-lpss.h       | 28 ++++---------------
 2 files changed, 6 insertions(+), 44 deletions(-)
 copy {drivers/pwm => include/linux/platform_data/x86}/pwm-lpss.h (53%)

diff --git a/drivers/pwm/pwm-lpss.h b/drivers/pwm/pwm-lpss.h
index 4ce6daa46ca8..bf841250385f 100644
--- a/drivers/pwm/pwm-lpss.h
+++ b/drivers/pwm/pwm-lpss.h
@@ -13,7 +13,7 @@
 #include <linux/pwm.h>
 #include <linux/types.h>
 
-struct device;
+#include <linux/platform_data/x86/pwm-lpss.h>
 
 #define LPSS_MAX_PWMS			4
 
@@ -23,29 +23,9 @@ 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;
-};
-
 extern const struct pwm_lpss_boardinfo pwm_lpss_byt_info;
 extern const struct pwm_lpss_boardinfo pwm_lpss_bsw_info;
 extern const struct pwm_lpss_boardinfo pwm_lpss_bxt_info;
 extern const struct pwm_lpss_boardinfo pwm_lpss_tng_info;
 
-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/drivers/pwm/pwm-lpss.h b/include/linux/platform_data/x86/pwm-lpss.h
similarity index 53%
copy from drivers/pwm/pwm-lpss.h
copy to include/linux/platform_data/x86/pwm-lpss.h
index 4ce6daa46ca8..296bd837ddbb 100644
--- a/drivers/pwm/pwm-lpss.h
+++ b/include/linux/platform_data/x86/pwm-lpss.h
@@ -1,27 +1,14 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel Low Power Subsystem PWM controller driver
- *
- * Copyright (C) 2014, Intel Corporation
- *
- * Derived from the original pwm-lpss.c
- */
+/* Intel Low Power Subsystem PWM controller driver */
 
-#ifndef __PWM_LPSS_H
-#define __PWM_LPSS_H
+#ifndef __PLATFORM_DATA_X86_PWM_LPSS_H
+#define __PLATFORM_DATA_X86_PWM_LPSS_H
 
-#include <linux/pwm.h>
 #include <linux/types.h>
 
 struct device;
 
-#define LPSS_MAX_PWMS			4
-
-struct pwm_lpss_chip {
-	struct pwm_chip chip;
-	void __iomem *regs;
-	const struct pwm_lpss_boardinfo *info;
-};
+struct pwm_lpss_chip;
 
 struct pwm_lpss_boardinfo {
 	unsigned long clk_rate;
@@ -40,12 +27,7 @@ struct pwm_lpss_boardinfo {
 	bool other_devices_aml_touches_pwm_regs;
 };
 
-extern const struct pwm_lpss_boardinfo pwm_lpss_byt_info;
-extern const struct pwm_lpss_boardinfo pwm_lpss_bsw_info;
-extern const struct pwm_lpss_boardinfo pwm_lpss_bxt_info;
-extern const struct pwm_lpss_boardinfo pwm_lpss_tng_info;
-
 struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, void __iomem *base,
 				     const struct pwm_lpss_boardinfo *info);
 
-#endif	/* __PWM_LPSS_H */
+#endif	/* __PLATFORM_DATA_X86_PWM_LPSS_H */
-- 
2.35.1