From facc23b8ff21e9fb328938baf15ae68a91af0cb9 Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Thu, 15 Nov 2018 18:51:18 +0000 Subject: rtc: isl1208: Use i2c block read/write routines The Linux i2c layer has functions to execute common SMBUS/I2C transactions. The register access code here is identical to the I2C read/write block data routines. Cc: Alessandro Zummo Cc: Alexandre Belloni Signed-off-by: Trent Piepho Signed-off-by: Alexandre Belloni --- drivers/rtc/rtc-isl1208.c | 37 ++++--------------------------------- 1 file changed, 4 insertions(+), 33 deletions(-) (limited to 'drivers/rtc/rtc-isl1208.c') diff --git a/drivers/rtc/rtc-isl1208.c b/drivers/rtc/rtc-isl1208.c index ec5ef518a09b..37ab3e1d25f5 100644 --- a/drivers/rtc/rtc-isl1208.c +++ b/drivers/rtc/rtc-isl1208.c @@ -84,29 +84,13 @@ static int isl1208_i2c_read_regs(struct i2c_client *client, u8 reg, u8 buf[], unsigned len) { - u8 reg_addr[1] = { reg }; - struct i2c_msg msgs[2] = { - { - .addr = client->addr, - .len = sizeof(reg_addr), - .buf = reg_addr - }, - { - .addr = client->addr, - .flags = I2C_M_RD, - .len = len, - .buf = buf - } - }; int ret; WARN_ON(reg > ISL1219_REG_YRT); WARN_ON(reg + len > ISL1219_REG_YRT + 1); - ret = i2c_transfer(client->adapter, msgs, 2); - if (ret > 0) - ret = 0; - return ret; + ret = i2c_smbus_read_i2c_block_data(client, reg, len, buf); + return (ret < 0) ? ret : 0; } /* block write */ @@ -114,26 +98,13 @@ static int isl1208_i2c_set_regs(struct i2c_client *client, u8 reg, u8 const buf[], unsigned len) { - u8 i2c_buf[ISL1208_REG_USR2 + 2]; - struct i2c_msg msgs[1] = { - { - .addr = client->addr, - .len = len + 1, - .buf = i2c_buf - } - }; int ret; WARN_ON(reg > ISL1219_REG_YRT); WARN_ON(reg + len > ISL1219_REG_YRT + 1); - i2c_buf[0] = reg; - memcpy(&i2c_buf[1], &buf[0], len); - - ret = i2c_transfer(client->adapter, msgs, 1); - if (ret > 0) - ret = 0; - return ret; + ret = i2c_smbus_write_i2c_block_data(client, reg, len, buf); + return (ret < 0) ? ret : 0; } /* simple check to see whether we have a isl1208 */ -- cgit >
path: root/Documentation/bpf
AgeCommit message (Expand)Author
2020-02-20docs/bpf: Update bpf development Q/A fileYonghong Song