From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1g1wVt-0005xC-NK for barebox@lists.infradead.org; Mon, 17 Sep 2018 16:36:43 +0000 Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7] helo=dude.pengutronix.de.) by metis.ext.pengutronix.de with esmtp (Exim 4.89) (envelope-from ) id 1g1wVf-0004Oi-Iv for barebox@lists.infradead.org; Mon, 17 Sep 2018 18:36:27 +0200 From: Lucas Stach Date: Mon, 17 Sep 2018 18:36:26 +0200 Message-Id: <20180917163627.14746-1-l.stach@pengutronix.de> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 1/2] ARM: rdu2: config PMIC SW1AB and SW1C rails to 1.375 To: barebox@lists.infradead.org This is the default out-of-reset voltage, but if only the i.MX6 SoC got reset, the PMIC might still be stuck at the lower volatge for the slow operating point. Signed-off-by: Lucas Stach --- arch/arm/boards/zii-imx6q-rdu2/board.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/arch/arm/boards/zii-imx6q-rdu2/board.c b/arch/arm/boards/zii-imx6q-rdu2/board.c index f6c908c9f16d..bce221bf8d20 100644 --- a/arch/arm/boards/zii-imx6q-rdu2/board.c +++ b/arch/arm/boards/zii-imx6q-rdu2/board.c @@ -137,10 +137,27 @@ late_initcall(rdu2_enable_front_panel_usb); static int rdu2_devices_init(void) { + struct i2c_client client; + if (!of_machine_is_compatible("zii,imx6q-zii-rdu2") && !of_machine_is_compatible("zii,imx6qp-zii-rdu2")) return 0; + client.adapter = i2c_get_adapter(1); + if (client.adapter) { + u8 reg; + + /* + * Reset PMIC SW1AB and SW1C rails to 1.375V. If an event + * caused only the i.MX6 SoC reset, the PMIC might still be + * stuck on the low voltage for the slow operating point. + */ + client.addr = 0x08; /* PMIC i2c address */ + reg = 0x2b; /* 1.375V, valid for both rails */ + i2c_write_reg(&client, 0x20, ®, 1); + i2c_write_reg(&client, 0x2e, ®, 1); + } + barebox_set_hostname("rdu2"); imx6_bbu_internal_spi_i2c_register_handler("SPI", "/dev/m25p0.barebox", -- 2.19.0 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox