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Wed, 16 Aug 2017 09:58:22 +0800 (CST) From: Joseph Chen To: gnurou@gmail.com, linus.walleij@linaro.org, dmitry.torokhov@gmail.com, lee.jones@linaro.org Cc: linux-kernel@vger.kernel.org, huangtao@rock-chips.com, devicetree@vger.kernel.org, linux-gpio@vger.kernel.org, broonie@kernel.org, zhangqing@rock-chips.com, robh+dt@kernel.org, lgirdwood@gmail.com, linux-rockchip@lists.infradead.org, wdc@rock-chips.com, tony.xie@rock-chips.com, linux-input@vger.kernel.org, mark.rutland@arm.com, w.egorov@phytec.de, linux-clk@vger.kernel.org, a.zummo@towertech.it, alexandre.belloni@free-electrons.com, rtc-linux@googlegroups.com, Joseph Chen Subject: [RESEND v9 01/12] mfd: rk808: fix up the chip id get failed Date: Wed, 16 Aug 2017 09:56:57 +0800 Message-Id: <1502848628-27757-2-git-send-email-chenjh@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1502848628-27757-1-git-send-email-chenjh@rock-chips.com> References: <1502848628-27757-1-git-send-email-chenjh@rock-chips.com> Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Elaine Zhang the rk8xx chip id is: ((MSB << 8) | LSB) & 0xfff0 Signed-off-by: Elaine Zhang Signed-off-by: Joseph Chen Acked-for-MFD-by: Lee Jones --- 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 fd087cb..8e60eba 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 83701ef..54feb14 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,