From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932090AbdCIJ1H (ORCPT ); Thu, 9 Mar 2017 04:27:07 -0500 Received: from regular1.263xmail.com ([211.150.99.137]:33558 "EHLO regular1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754189AbdCIJ0N (ORCPT ); Thu, 9 Mar 2017 04:26:13 -0500 X-263anti-spam: KSV:0; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-KSVirus-check: 0 X-ABS-CHECKED: 4 X-RL-SENDER: zhangqing@rock-chips.com X-FST-TO: lee.jones@linaro.org X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: zhangqing@rock-chips.com X-UNIQUE-TAG: <93d3b2b53c9fee128f6e725b9763008c> X-ATTACHMENT-NUM: 0 X-DNS-TYPE: 0 From: Elaine Zhang To: lee.jones@linaro.org, lgirdwood@gmail.com, broonie@kernel.org Cc: huangtao@rock-chips.com, xxx@rock-chips.com, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, chenjh@rock-chips.com, Elaine Zhang Subject: [PATCH v1 1/4] mfd: rk808: fix up the chip id get failed Date: Thu, 9 Mar 2017 16:49:59 +0800 Message-Id: <1489049402-15791-2-git-send-email-zhangqing@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1489049402-15791-1-git-send-email-zhangqing@rock-chips.com> References: <1489049402-15791-1-git-send-email-zhangqing@rock-chips.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org the rk8xx chip id is: ((MSB << 8) | LSB) & 0xfff0 Signed-off-by: Elaine Zhang --- drivers/mfd/rk808.c | 21 +++++++++++++++------ include/linux/mfd/rk808.h | 1 + 2 files changed, 16 insertions(+), 6 deletions(-) diff --git a/drivers/mfd/rk808.c b/drivers/mfd/rk808.c index fd087cbb0bde..3334a2a7f3fb 100644 --- a/drivers/mfd/rk808.c +++ b/drivers/mfd/rk808.c @@ -325,7 +325,7 @@ static int rk808_probe(struct i2c_client *client, void (*pm_pwroff_fn)(void); int nr_pre_init_regs; int nr_cells; - int pm_off = 0; + int pm_off = 0, msb, lsb; int ret; int i; @@ -333,14 +333,23 @@ static int rk808_probe(struct i2c_client *client, if (!rk808) return -ENOMEM; - rk808->variant = i2c_smbus_read_word_data(client, RK808_ID_MSB); - if (rk808->variant < 0) { - dev_err(&client->dev, "Failed to read the chip id at 0x%02x\n", + /* read Chip variant */ + msb = i2c_smbus_read_byte_data(client, RK808_ID_MSB); + if (msb < 0) { + dev_err(&client->dev, "failed to read the chip id at 0x%x\n", RK808_ID_MSB); - return rk808->variant; + return msb; } - dev_dbg(&client->dev, "Chip id: 0x%x\n", (unsigned int)rk808->variant); + lsb = i2c_smbus_read_byte_data(client, RK808_ID_LSB); + if (lsb < 0) { + dev_err(&client->dev, "failed to read the chip id at 0x%x\n", + RK808_ID_LSB); + return lsb; + } + + rk808->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK; + dev_info(&client->dev, "Chip id: 0x%x\n", (unsigned int)rk808->variant); switch (rk808->variant) { case RK808_ID: diff --git a/include/linux/mfd/rk808.h b/include/linux/mfd/rk808.h index 83701ef7d3c7..54feb140c210 100644 --- a/include/linux/mfd/rk808.h +++ b/include/linux/mfd/rk808.h @@ -298,6 +298,7 @@ enum rk818_reg { #define VOUT_LO_INT BIT(0) #define CLK32KOUT2_EN BIT(0) +#define RK8XX_ID_MSK 0xfff0 enum { BUCK_ILMIN_50MA, BUCK_ILMIN_100MA, -- 1.9.1