linux-kernel - [PATCH v2] usb: isp1760: add peripheral/device controller chip id

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Message-Id: <1424951277-13375-1-git-send-email-sudeep.holla@arm.com>
Date:	Thu, 26 Feb 2015 11:47:57 +0000
From:	Sudeep Holla <sudeep.holla@....com>
To:	Felipe Balbi <balbi@...com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:	Sudeep Holla <sudeep.holla@....com>, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH v2] usb: isp1760: add peripheral/device controller chip id

As per the SAF1761 data sheet[0], the DcChipID register represents
the hardware version number (0001h) and the chip ID (1582h) for the
Peripheral Controller.

However as per the ISP1761 data sheet[1], the DcChipID register
represents the hardware version number (0015h) and the chip ID (8210h)
for the Peripheral Controller.

This patch adds support for both the chip ID values.

[0] http://www.nxp.com/documents/data_sheet/SAF1761.pdf
[1] http://pdf.datasheetcatalog.com/datasheets2/74/742102_1.pdf

Cc: Felipe Balbi <balbi@...com>
Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Signed-off-by: Sudeep Holla <sudeep.holla@....com>
---
 drivers/usb/isp1760/isp1760-udc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Changes v1->v2:
 - Updated to support both chip IDs: 0x00011582 and 0x00158210 instead of
   just 0x00158210 as suggested by Laurent

diff --git a/drivers/usb/isp1760/isp1760-udc.c b/drivers/usb/isp1760/isp1760-udc.c
index 9612d7990565..6d618b3fab07 100644
--- a/drivers/usb/isp1760/isp1760-udc.c
+++ b/drivers/usb/isp1760/isp1760-udc.c
@@ -1411,7 +1411,7 @@ static int isp1760_udc_init(struct isp1760_udc *udc)
 		return -ENODEV;
 	}
 
-	if (chipid != 0x00011582) {
+	if (chipid != 0x00011582 && chipid != 0x00158210) {
 		dev_err(udc->isp->dev, "udc: invalid chip ID 0x%08x\n", chipid);
 		return -ENODEV;
 	}
-- 
1.9.1

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