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From:   Sascha Hauer <s.hauer@pengutronix.de>
To:     linux-rockchip@lists.infradead.org
Cc:     linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-pm@vger.kernel.org, Heiko Stuebner <heiko@sntech.de>,
        Chanwoo Choi <chanwoo@kernel.org>,
        Kyungmin Park <kyungmin.park@samsung.com>,
        MyungJoo Ham <myungjoo.ham@samsung.com>,
        Will Deacon <will@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>, kernel@pengutronix.de,
        Michael Riesch <michael.riesch@wolfvision.net>,
        Robin Murphy <robin.murphy@arm.com>,
        Vincent Legoll <vincent.legoll@gmail.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>, devicetree@vger.kernel.org,
        Sebastian Reichel <sebastian.reichel@collabora.com>,
        Sascha Hauer <s.hauer@pengutronix.de>,
        Jonathan Cameron <Jonathan.Cameron@huawei.com>,
        Chanwoo Choi <cw00.choi@samsung.com>
Subject: [PATCH v8 11/26] PM / devfreq: rockchip-dfi: Handle LPDDR2 correctly
Date:   Wed, 18 Oct 2023 08:16:59 +0200
Message-Id: <20231018061714.3553817-12-s.hauer@pengutronix.de>
In-Reply-To: <20231018061714.3553817-1-s.hauer@pengutronix.de>
References: <20231018061714.3553817-1-s.hauer@pengutronix.de>
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According to the downstream driver the DDRMON_CTRL_LPDDR23 bit must be
set for both LPDDR2 and LPDDR3. Add the missing LPDDR2 case and while
at it turn the if/else if/else into switch/case which makes it easier
to read.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/devfreq/event/rockchip-dfi.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c
index 571d72d1abd1c..8ce0191552ef1 100644
--- a/drivers/devfreq/event/rockchip-dfi.c
+++ b/drivers/devfreq/event/rockchip-dfi.c
@@ -83,12 +83,19 @@ static void rockchip_dfi_start_hardware_counter(struct devfreq_event_dev *edev)
 		       DDRMON_CTRL_HARDWARE_EN), dfi_regs + DDRMON_CTRL);
 
 	/* set ddr type to dfi */
-	if (dfi->ddr_type == ROCKCHIP_DDRTYPE_LPDDR3)
+	switch (dfi->ddr_type) {
+	case ROCKCHIP_DDRTYPE_LPDDR2:
+	case ROCKCHIP_DDRTYPE_LPDDR3:
 		writel_relaxed(HIWORD_UPDATE(DDRMON_CTRL_LPDDR23, DDRMON_CTRL_DDR_TYPE_MASK),
 			       dfi_regs + DDRMON_CTRL);
-	else if (dfi->ddr_type == ROCKCHIP_DDRTYPE_LPDDR4)
+		break;
+	case ROCKCHIP_DDRTYPE_LPDDR4:
 		writel_relaxed(HIWORD_UPDATE(DDRMON_CTRL_LPDDR4, DDRMON_CTRL_DDR_TYPE_MASK),
 			       dfi_regs + DDRMON_CTRL);
+		break;
+	default:
+		break;
+	}
 
 	/* enable count, use software mode */
 	writel_relaxed(HIWORD_UPDATE(DDRMON_CTRL_SOFTWARE_EN, DDRMON_CTRL_SOFTWARE_EN),
-- 
2.39.2