linux-kernel - [PATCH 01/12] bus: ti-sysc: Support 16-bit writes too

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Message-Id: <20190527121348.45251-2-tony@atomide.com>
Date:   Mon, 27 May 2019 05:13:37 -0700
From:   Tony Lindgren <tony@...mide.com>
To:     linux-omap@...r.kernel.org
Cc:     Dave Gerlach <d-gerlach@...com>, Faiz Abbas <faiz_abbas@...com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Keerthy <j-keerthy@...com>, Nishanth Menon <nm@...com>,
        Peter Ujfalusi <peter.ujfalusi@...com>,
        Roger Quadros <rogerq@...com>, Suman Anna <s-anna@...com>,
        Tero Kristo <t-kristo@...com>, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Rob Herring <robh@...nel.org>, devicetree@...r.kernel.org
Subject: [PATCH 01/12] bus: ti-sysc: Support 16-bit writes too

We need to also support 16-bit writes for i2c in addition to the reads
when we start configuring the sysconfig register for reset and idle modes.

Signed-off-by: Tony Lindgren <tony@...mide.com>
---
 drivers/bus/ti-sysc.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -100,6 +100,13 @@ static void sysc_parse_dts_quirks(struct sysc *ddata, struct device_node *np,
 
 static void sysc_write(struct sysc *ddata, int offset, u32 value)
 {
+	if (ddata->cfg.quirks & SYSC_QUIRK_16BIT) {
+		writew_relaxed(value & 0xffff, ddata->module_va + offset);
+		writew_relaxed(value >> 16, ddata->module_va + offset + 4);
+
+		return;
+	}
+
 	writel_relaxed(value, ddata->module_va + offset);
 }
 
-- 
2.21.0