RE: [PATCH 2/2] CHROMIUM: elants_i2c.c: Disable idle mode before firmware upgrade procedure.
From: James Chen <hidden>
Date: 2015-07-28 02:42:33
Dear Dmitry: We need to correct the value of sending fastboot or IAP command is 100msec not 40 msec. The firmware of all of volume-productions are used 100msec instead of 40msec. And I will correct the comment. James -----Original Message----- From: linux-input-owner@vger.kernel.org [mailto:linux-input-owner@vger.kernel.org] On Behalf Of Dmitry Torokhov Sent: Friday, July 24, 2015 6:17 AM To: james.chen Cc: Herman Lin; linux-input@vger.kernel.org; charliemooney@chromium.org Subject: Re: [PATCH 2/2] CHROMIUM: elants_i2c.c: Disable idle mode before firmware upgrade procedure. Hi James, On Tue, Jul 21, 2015 at 10:10:25AM +0800, james.chen wrote:
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From: "james.chen" <redacted> This patch is disable idle mode before firmware upgrade procedure. BUG=chrome-os-partner:39373 TEST= Test Elan touchscreen on cyan project(kernel 3.18) without problems. Signed-off-by: james.chen <redacted> --- drivers/input/touchscreen/elants_i2c.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)diff --git a/drivers/input/touchscreen/elants_i2c.c
b/drivers/input/touchscreen/elants_i2c.c
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index 0efd766..6d3570e 100644--- a/drivers/input/touchscreen/elants_i2c.c +++ b/drivers/input/touchscreen/elants_i2c.c@@ -605,6 +605,7 @@ static int elants_i2c_do_update_firmware(struct
i2c_client *client,
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const u8 enter_iap[] = { 0x45, 0x49, 0x41, 0x50 }; const u8 enter_iap2[] = { 0x54, 0x00, 0x12, 0x34 }; const u8 iap_ack[] = { 0x55, 0xaa, 0x33, 0xcc }; + const u8 close_idle[] = {0x54, 0x2c, 0x01, 0x01}; u8 buf[HEADER_SIZE]; u16 send_id; int page, n_fw_pages;@@ -617,8 +618,13 @@ static int elants_i2c_do_update_firmware(struct
i2c_client *client,
} else {
/* Start IAP Procedure */
dev_dbg(&client->dev, "Normal IAP procedure\n");
+ /* Close idle mode */
+ error = elants_i2c_send(client, close_idle,sizeof(close_idle));
+ if (error) + dev_err(&client->dev, "Failed close idle: %d\n",
error);
+ msleep(60); elants_i2c_sw_reset(client); - + msleep(20);
Are you sure that this delay is also needed? We have the following in elants_i2c_sw_reset(): /* * We should wait at least 10 msec (but no more than 40) before * sending fastboot or IAP command to the device. */ msleep(30); so additional 20 msec will push us out of the 40 msec window...
error = elants_i2c_send(client, enter_iap,
sizeof(enter_iap));
} -- 1.8.3.2
Thanks. -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html