[src/trunk]: src/sys/arch/macppc/dev if we have more than one i2c-bus node, l...

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

details:   https://anonhg.NetBSD.org/src/rev/f2248a97bf15
branches:  trunk
changeset: 467021:f2248a97bf15
user:      macallan <macallan%NetBSD.org@localhost>
date:      Thu Jan 09 18:47:46 2020 +0000

description:
if we have more than one i2c-bus node, look for children on both
now we find the light sensor in my shiny new toy

diffstat:

 sys/arch/macppc/dev/ki2c.c |  91 ++++++++++++++++++++++++---------------------
 1 files changed, 48 insertions(+), 43 deletions(-)

diffs (131 lines):

diff -r 89b871dc6abc -r f2248a97bf15 sys/arch/macppc/dev/ki2c.c
--- a/sys/arch/macppc/dev/ki2c.c        Thu Jan 09 17:06:46 2020 +0000
+++ b/sys/arch/macppc/dev/ki2c.c        Thu Jan 09 18:47:46 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ki2c.c,v 1.27 2019/12/22 23:23:30 thorpej Exp $        */
+/*     $NetBSD: ki2c.c,v 1.28 2020/01/09 18:47:46 macallan Exp $       */
 /*     Id: ki2c.c,v 1.7 2002/10/05 09:56:05 tsubai Exp */
 
 /*-
@@ -83,7 +83,7 @@
        struct confargs *ca = aux;
        int node = ca->ca_node;
        uint32_t addr, channel, reg;
-       int rate, child, /*namelen,*/ i2cbus;
+       int rate, child, /*namelen,*/ i2cbus[2] = {0, 0};
        struct i2cbus_attach_args iba;
        prop_dictionary_t dict = device_properties(self);
        prop_array_t cfg;
@@ -138,59 +138,63 @@
         * XXX
         * should probably check for multiple i2c-bus children
         */
-       i2cbus = 0;
+
+       int found_busnode = 0;
        channel = 0;
        child = OF_child(node);
-       while ((child != 0) && (i2cbus == 0)) {
+       while (child != 0) {
                OF_getprop(child, "name", name, sizeof(name));
                if (strcmp(name, "i2c-bus") == 0) {
                        OF_getprop(child, "reg", &channel, sizeof(channel));
-                       i2cbus = child;
+                       i2cbus[channel] = child;
                        DPRINTF("found channel %x\n", channel);
+                       found_busnode = 1;
                }
                child = OF_peer(child);
        }
-       if (i2cbus == 0) 
-               i2cbus = node;
+       if (found_busnode == 0) 
+               i2cbus[0] = node;
 
-       devs = OF_child(i2cbus);
-       while (devs != 0) {
-               if (OF_getprop(devs, "name", name, 32) <= 0)
-                       goto skip;
-               if (OF_getprop(devs, "compatible", compat, 256) <= 0) {
-                       /* some i2c device nodes don't have 'compatible' */
-                       memset(compat, 0, 256);
-                       strncpy(compat, name, 256);
-               } 
-               if (OF_getprop(devs, "reg", &addr, 4) <= 0)
-                       if (OF_getprop(devs, "i2c-address", &addr, 4) <= 0)
+       for (channel = 0; channel < 2; channel++) {
+               devs = OF_child(i2cbus[channel]);
+               while (devs != 0) {
+                       if (OF_getprop(devs, "name", name, 32) <= 0)
                                goto skip;
-               addr |= channel << 8;
-               addr = addr >> 1;
-               DPRINTF("-> %s@%x\n", name, addr);
-               dev = prop_dictionary_create();
-               prop_dictionary_set_cstring(dev, "name", name);
-               data = prop_data_create_data(compat, strlen(compat)+1);
-               prop_dictionary_set(dev, "compatible", data);
-               prop_object_release(data);
-               prop_dictionary_set_uint32(dev, "addr", addr);
-               prop_dictionary_set_uint64(dev, "cookie", devs);
-               /* look for location info for sensors */
-               devc = OF_child(devs);
-               while (devc != 0) {
-                       if (OF_getprop(devc, "reg", &reg, 4) < 4) goto nope;
-                       if (OF_getprop(devc, "location", descr, 32) <= 0)
-                               goto nope;
-                       DPRINTF("found '%s' at %02x\n", descr, reg);
-                       snprintf(num, 7, "s%02x", reg);
-                       prop_dictionary_set_cstring(dev, num, descr);
-               nope:
-                       devc = OF_peer(devc);
+                       if (OF_getprop(devs, "compatible", compat, 256) <= 0) {
+                               /* some i2c device nodes don't have 'compatible' */
+                               memset(compat, 0, 256);
+                               strncpy(compat, name, 256);
+                       } 
+                       if (OF_getprop(devs, "reg", &addr, 4) <= 0)
+                               if (OF_getprop(devs, "i2c-address", &addr, 4) <= 0)
+                                       goto skip;
+                       addr |= channel << 8;
+                       addr = addr >> 1;
+                       DPRINTF("-> %s@%x\n", name, addr);
+                       dev = prop_dictionary_create();
+                       prop_dictionary_set_cstring(dev, "name", name);
+                       data = prop_data_create_data(compat, strlen(compat)+1);
+                       prop_dictionary_set(dev, "compatible", data);
+                       prop_object_release(data);
+                       prop_dictionary_set_uint32(dev, "addr", addr);
+                       prop_dictionary_set_uint64(dev, "cookie", devs);
+                       /* look for location info for sensors */
+                       devc = OF_child(devs);
+                       while (devc != 0) {
+                               if (OF_getprop(devc, "reg", &reg, 4) < 4) goto nope;
+                               if (OF_getprop(devc, "location", descr, 32) <= 0)
+                                       goto nope;
+                               DPRINTF("found '%s' at %02x\n", descr, reg);
+                               snprintf(num, 7, "s%02x", reg);
+                               prop_dictionary_set_cstring(dev, num, descr);
+                       nope:
+                               devc = OF_peer(devc);
+                       }
+                       prop_array_add(cfg, dev);
+                       prop_object_release(dev);
+               skip:
+                       devs = OF_peer(devs);
                }
-               prop_array_add(cfg, dev);
-               prop_object_release(dev);
-       skip:
-               devs = OF_peer(devs);
        }
 
        /* fill in the i2c tag */
@@ -405,6 +409,7 @@
 
        /* we handle the subaddress stuff ourselves */
        ki2c_setmode(sc, channel | I2C_STDMODE);        
+       ki2c_setspeed(sc, I2C_50kHz);
 
        /* Write-buffer defaults to vcmd */
        wp = (uint8_t *)(__UNCONST(vcmd));