linux-kernel - [PATCH v7 16/24] pwm: jz4740: Add support for the JZ4725B

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Message-Id: <20180821171635.22740-17-paul@crapouillou.net>
Date:   Tue, 21 Aug 2018 19:16:27 +0200
From:   Paul Cercueil <paul@...pouillou.net>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        Jonathan Corbet <corbet@....net>
Cc:     od@...c.me, Mathieu Malaterre <malat@...ian.org>,
        linux-pwm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-watchdog@...r.kernel.org,
        linux-mips@...ux-mips.org, linux-doc@...r.kernel.org,
        linux-clk@...r.kernel.org, Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH v7 16/24] pwm: jz4740: Add support for the JZ4725B

The PWM in the JZ4725B works the same as in the JZ4740, except that it
only has 6 channels available instead of 8.

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---

Notes:
     v5: New patch
    
     v6: - Move of_device_id structure back at the bottom (less noise in
           patch)
         - Use device_get_match_data() instead of of_* variant
    
     v7: No change

 drivers/pwm/pwm-jz4740.c | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/drivers/pwm/pwm-jz4740.c b/drivers/pwm/pwm-jz4740.c
index 5814825d9bed..66a72bd7424f 100644
--- a/drivers/pwm/pwm-jz4740.c
+++ b/drivers/pwm/pwm-jz4740.c
@@ -25,6 +25,10 @@
 
 #define NUM_PWM 8
 
+struct jz4740_soc_info {
+	unsigned int num_pwms;
+};
+
 struct jz4740_pwm_chip {
 	struct pwm_chip chip;
 	struct clk *clks[NUM_PWM];
@@ -200,9 +204,14 @@ static const struct pwm_ops jz4740_pwm_ops = {
 
 static int jz4740_pwm_probe(struct platform_device *pdev)
 {
+	const struct jz4740_soc_info *soc_info;
 	struct jz4740_pwm_chip *jz4740;
 	struct device *dev = &pdev->dev;
 
+	soc_info = device_get_match_data(dev);
+	if (!soc_info)
+		return -EINVAL;
+
 	jz4740 = devm_kzalloc(dev, sizeof(*jz4740), GFP_KERNEL);
 	if (!jz4740)
 		return -ENOMEM;
@@ -215,7 +224,7 @@ static int jz4740_pwm_probe(struct platform_device *pdev)
 
 	jz4740->chip.dev = dev;
 	jz4740->chip.ops = &jz4740_pwm_ops;
-	jz4740->chip.npwm = NUM_PWM;
+	jz4740->chip.npwm = soc_info->num_pwms;
 	jz4740->chip.base = -1;
 	jz4740->chip.of_xlate = of_pwm_xlate_with_flags;
 	jz4740->chip.of_pwm_n_cells = 3;
@@ -233,8 +242,17 @@ static int jz4740_pwm_remove(struct platform_device *pdev)
 }
 
 #ifdef CONFIG_OF
+static const struct jz4740_soc_info jz4740_soc_info = {
+	.num_pwms = 8,
+};
+
+static const struct jz4740_soc_info jz4725b_soc_info = {
+	.num_pwms = 6,
+};
+
 static const struct of_device_id jz4740_pwm_dt_ids[] = {
-	{ .compatible = "ingenic,jz4740-pwm", },
+	{ .compatible = "ingenic,jz4740-pwm", .data = &jz4740_soc_info },
+	{ .compatible = "ingenic,jz4725b-pwm", .data = &jz4725b_soc_info },
 	{},
 };
 MODULE_DEVICE_TABLE(of, jz4740_pwm_dt_ids);
-- 
2.11.0