[src/trunk]: src/sys/dev/i2c - No need to use I2C_F_POLL here.

[thorpej <thorpej%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/9df0ea770083
branches:  trunk
changeset: 968099:9df0ea770083
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Thu Jan 02 17:03:05 2020 +0000

description:
- No need to use I2C_F_POLL here.
- Correctly propagate errors up the stack.

diffstat:

 sys/dev/i2c/r2025.c |  69 +++++++++++++++++++++++++++++-----------------------
 1 files changed, 38 insertions(+), 31 deletions(-)

diffs (168 lines):

diff -r b455419cdadc -r 9df0ea770083 sys/dev/i2c/r2025.c
--- a/sys/dev/i2c/r2025.c       Thu Jan 02 16:56:58 2020 +0000
+++ b/sys/dev/i2c/r2025.c       Thu Jan 02 17:03:05 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: r2025.c,v 1.8 2018/06/16 21:22:13 thorpej Exp $ */
+/* $NetBSD: r2025.c,v 1.9 2020/01/02 17:03:05 thorpej Exp $ */
 
 /*-
  * Copyright (c) 2006 Shigeyuki Fukushima.
@@ -33,7 +33,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: r2025.c,v 1.8 2018/06/16 21:22:13 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: r2025.c,v 1.9 2020/01/02 17:03:05 thorpej Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -109,20 +109,21 @@
        uint8_t rctrl;
        uint8_t bcd[R2025_CLK_SIZE];
        int hour;
+       int error;
 
        memset(&dt, 0, sizeof(dt));
 
-       if (r2025rtc_reg_read(sc, R2025_REG_CTRL1, &rctrl, 1) != 0) {
+       if ((error = r2025rtc_reg_read(sc, R2025_REG_CTRL1, &rctrl, 1)) != 0) {
                aprint_error_dev(sc->sc_dev,
                    "r2025rtc_gettime: failed to read registers.\n");
-               return -1;
+               return error;
        }
 
-       if (r2025rtc_reg_read(sc, R2025_REG_SEC, &bcd[0], R2025_CLK_SIZE)
-               != 0) {
+       if ((error = r2025rtc_reg_read(sc, R2025_REG_SEC, &bcd[0],
+                                      R2025_CLK_SIZE)) != 0) {
                aprint_error_dev(sc->sc_dev,
                    "r2025rtc_gettime: failed to read registers.\n");
-               return -1;
+               return error;
        }
 
        dt.dt_sec = bcdtobin(bcd[R2025_REG_SEC] & R2025_REG_SEC_MASK);
@@ -160,6 +161,7 @@
        struct clock_ymdhms dt;
        uint8_t rctrl;
        uint8_t bcd[R2025_CLK_SIZE];
+       int error;
 
        clock_secs_to_ymdhms(tv->tv_sec, &dt);
 
@@ -168,13 +170,13 @@
                aprint_error_dev(sc->sc_dev,
                    "r2025rtc_settime: "
                    "RTC does not support year 3000 or over.\n");
-               return -1;
+               return EINVAL;
        }
 
-       if (r2025rtc_reg_read(sc, R2025_REG_CTRL1, &rctrl, 1) != 0) {
+       if ((error = r2025rtc_reg_read(sc, R2025_REG_CTRL1, &rctrl, 1)) != 0) {
                aprint_error_dev(sc->sc_dev,
                    "r2025rtc_settime: failed to read register.\n");
-               return -1;
+               return error;
        }
        rctrl |= R2025_REG_CTRL1_H1224;
 
@@ -189,15 +191,16 @@
        bcd[R2025_REG_YEAR] = bintobcd(dt.dt_year % 100) & R2025_REG_YEAR_MASK;
 
        /* Write RTC register */
-       if (r2025rtc_reg_write(sc, R2025_REG_CTRL1, &rctrl, 1) != 0) {
+       if ((error = r2025rtc_reg_write(sc, R2025_REG_CTRL1, &rctrl, 1)) != 0) {
                aprint_error_dev(sc->sc_dev,
                    "r2025rtc_settime: failed to write registers.\n");
-               return -1;
+               return error;
        }
-       if (r2025rtc_reg_write(sc, R2025_REG_SEC, bcd, R2025_CLK_SIZE) != 0) {
+       if ((error = r2025rtc_reg_write(sc, R2025_REG_SEC, bcd,
+                                       R2025_CLK_SIZE)) != 0) {
                aprint_error_dev(sc->sc_dev,
                    "r2025rtc_settime: failed to write registers.\n");
-               return -1;
+               return error;
        }
 
        return 0;
@@ -209,26 +212,28 @@
        int i;
        uint8_t buf[1];
        uint8_t cmdbuf[1];
+       int error;
 
-       if (iic_acquire_bus(sc->sc_tag, I2C_F_POLL)) {
+       if ((error = iic_acquire_bus(sc->sc_tag, 0)) != 0) {
                aprint_error_dev(sc->sc_dev,
-                   "r2025rtc_clock_write: failed to acquire I2C bus\n");
-               return -1;
+                   "r2025rtc_reg_write: failed to acquire I2C bus\n");
+               return error;
        }
 
        for (i = 0 ; i < len ; i++) {
                cmdbuf[0] = (((reg + i) << 4) & 0xf0);
                buf[0] = val[i];
-               if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_address,
-                               cmdbuf, 1, buf, 1, I2C_F_POLL)) {
-                       iic_release_bus(sc->sc_tag, I2C_F_POLL);
+               if ((error = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP,
+                                     sc->sc_address, cmdbuf, 1, buf, 1,
+                                     0)) != 0) {
+                       iic_release_bus(sc->sc_tag, 0);
                        aprint_error_dev(sc->sc_dev, "r2025rtc_reg_write: "
                                "failed to write registers\n");
-                       return -1;
+                       return error;
                }
        }
 
-       iic_release_bus(sc->sc_tag, I2C_F_POLL);
+       iic_release_bus(sc->sc_tag, 0);
 
        return 0;
 }
@@ -239,28 +244,30 @@
        int i;
        uint8_t buf[1];
        uint8_t cmdbuf[1];
+       int error;
 
-       if (iic_acquire_bus(sc->sc_tag, I2C_F_POLL)) {
+       if ((error = iic_acquire_bus(sc->sc_tag, 0)) != 0) {
                aprint_error_dev(sc->sc_dev,
-                   "r2025rtc_clock_read: failed to acquire I2C bus\n");
-               return -1;
+                   "r2025rtc_reg_read: failed to acquire I2C bus\n");
+               return error;
        }
 
        for (i = 0 ; i < len ; i++) {
                cmdbuf[0] = (((reg + i) << 4) & 0xf0);
                buf[0] = 0;
-               if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_address,
-                               cmdbuf, 1, buf, 1, I2C_F_POLL)) {
-                       iic_release_bus(sc->sc_tag, I2C_F_POLL);
+               if ((error = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
+                                     sc->sc_address, cmdbuf, 1, buf, 1,
+                                     0)) != 0) {
+                       iic_release_bus(sc->sc_tag, 0);
                        aprint_error_dev(sc->sc_dev, "r2025rtc_reg_read: "
-                               "failed to write registers\n");
-                       return -1;
+                               "failed to read registers\n");
+                       return error;
                }
 
                *(val + i) = buf[0];
        }
 
-       iic_release_bus(sc->sc_tag, I2C_F_POLL);
+       iic_release_bus(sc->sc_tag, 0);
 
        return 0;
 }