linux-kernel - [PATCH v1 6/6] pinctrl: intel: Enumerate PWM device when community has a capabilitty

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Message-Id: <20221101155642.52575-7-andriy.shevchenko@linux.intel.com>
Date:   Tue,  1 Nov 2022 17:56:42 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Thierry Reding <thierry.reding@...il.com>,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-pwm@...r.kernel.org
Cc:     Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Andy Shevchenko <andy@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH v1 6/6] pinctrl: intel: Enumerate PWM device when community has a capabilitty

Some of the Communities may have PWM capability. In such cases,
enumerate PWM device via respective driver. User is still responsible
for setting correct pin muxing for the line that needs to output the
signal.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/pinctrl/intel/pinctrl-intel.c | 29 +++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/drivers/pinctrl/intel/pinctrl-intel.c b/drivers/pinctrl/intel/pinctrl-intel.c
index e17d1318b913..fe5bf2184cbf 100644
--- a/drivers/pinctrl/intel/pinctrl-intel.c
+++ b/drivers/pinctrl/intel/pinctrl-intel.c
@@ -24,6 +24,8 @@
 #include <linux/pinctrl/pinctrl.h>
 #include <linux/pinctrl/pinmux.h>
 
+#include <linux/platform_data/x86/pwm-lpss.h>
+
 #include "../core.h"
 #include "pinctrl-intel.h"
 
@@ -49,6 +51,8 @@
 #define PADOWN_MASK(p)			(GENMASK(3, 0) << PADOWN_SHIFT(p))
 #define PADOWN_GPP(p)			((p) / 8)
 
+#define PWMC				0x204
+
 /* Offset from pad_regs */
 #define PADCFG0				0x000
 #define PADCFG0_RXEVCFG_SHIFT		25
@@ -1494,6 +1498,27 @@ static int intel_pinctrl_pm_init(struct intel_pinctrl *pctrl)
 	return 0;
 }
 
+static int intel_pinctrl_probe_pwm(struct intel_pinctrl *pctrl,
+				   struct intel_community *community)
+{
+	static const struct pwm_lpss_boardinfo info = {
+		.clk_rate = 19200000,
+		.npwm = 1,
+		.base_unit_bits = 22,
+		.bypass = true,
+	};
+	struct pwm_lpss_chip *pwm;
+
+	if (!(community->features & PINCTRL_FEATURE_PWM))
+		return 0;
+
+	pwm = pwm_lpss_probe(pctrl->dev, community->regs + PWMC, &info);
+	if (IS_ERR(pwm) && PTR_ERR(pwm) != -ENODEV)
+		return PTR_ERR(pwm);
+
+	return 0;
+}
+
 int intel_pinctrl_probe(struct platform_device *pdev,
 			const struct intel_pinctrl_soc_data *soc_data)
 {
@@ -1592,6 +1617,10 @@ int intel_pinctrl_probe(struct platform_device *pdev,
 			ret = intel_pinctrl_add_padgroups_by_size(pctrl, community);
 		if (ret)
 			return ret;
+
+		ret = intel_pinctrl_probe_pwm(pctrl, community);
+		if (ret)
+			return ret;
 	}
 
 	irq = platform_get_irq(pdev, 0);
-- 
2.35.1