static int update_dt_node(u32 phandle, s32 scope)
{
struct update_props_workarea *upwa;
struct device_node *dn;
struct property *prop = NULL;
int i, rc, rtas_rc;
char *prop_data;
char *rtas_buf;
int update_properties_token;
u32 vd;
update_properties_token = rtas_token("ibm,update-properties");
if (update_properties_token == RTAS_UNKNOWN_SERVICE)
return -EINVAL;
rtas_buf = kzalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL);
if (!rtas_buf)
return -ENOMEM;
dn = of_find_node_by_phandle(phandle);
if (!dn) {
kfree(rtas_buf);
return -ENOENT;
}
upwa = (struct update_props_workarea *)&rtas_buf[0];
upwa->phandle = phandle;
do {
rtas_rc = mobility_rtas_call(update_properties_token, rtas_buf,
scope);
if (rtas_rc < 0)
break;
prop_data = rtas_buf + sizeof(*upwa);
/* On the first call to ibm,update-properties for a node the
* the first property value descriptor contains an empty
* property name, the property value length encoded as u32,
* and the property value is the node path being updated.
*/
if (*prop_data == 0) {
prop_data++;
vd = *(u32 *)prop_data;
prop_data += vd + sizeof(vd);
upwa->nprops--;
}
for (i = 0; i < upwa->nprops; i++) {
char *prop_name;
prop_name = prop_data;
prop_data += strlen(prop_name) + 1;
vd = *(u32 *)prop_data;
prop_data += sizeof(vd);
switch (vd) {
case 0x00000000:
/* name only property, nothing to do */
break;
case 0x80000000:
prop = of_find_property(dn, prop_name, NULL);
of_remove_property(dn, prop);
prop = NULL;
break;
default:
rc = update_dt_property(dn, &prop, prop_name,
vd, prop_data);
if (rc) {
printk(KERN_ERR "Could not update %s"
" property\n", prop_name);
}
prop_data += vd;
}
}
} while (rtas_rc == 1);
of_node_put(dn);
kfree(rtas_buf);
return 0;
}
static void disable_serial_gpio(void)
{
struct device_node *np_tx, *np_rx, *np_tx_def, *np_rx_def;
struct property *pp;
static u32 pin_func_val;
static struct property pin_func = {
.name = "qcom,pin-func",
.value = &pin_func_val,
.length = sizeof(pin_func_val),
};
static struct property output_low = {
.name = "output-low",
.value = NULL,
.length = 0,
};
static struct property bias_disable = {
.name = "bias-disable",
.value = NULL,
.length = 0,
};
np_tx = of_find_node_by_path(
"/soc/pinctrl@fd510000/msm_gpio_4");
if (!np_tx) {
pr_err("couldn't find msm_gpio_4 node\n");
return;
}
np_rx = of_find_node_by_path(
"/soc/pinctrl@fd510000/msm_gpio_5");
if (!np_rx) {
pr_err("couldn't find msm_gpio_5 node\n");
goto err0;
}
of_update_property(np_tx, &pin_func);
of_update_property(np_rx, &pin_func);
np_tx_def = of_find_node_by_name(np_tx, "default");
if (!np_tx_def) {
pr_err("couldn't find msm_gpio_4_def node\n");
goto err1;
}
np_rx_def = of_find_node_by_name(np_rx, "default");
if (!np_rx_def) {
pr_err("couldn't find msm_gpio_5_def node\n");
goto err2;
}
of_add_property(np_tx_def, &output_low);
pp = of_find_property(np_rx_def, "bias-pull-up", NULL);
if (pp) {
of_remove_property(np_rx_def, pp);
of_add_property(np_rx_def, &bias_disable);
}
of_add_property(np_rx_def, &output_low);
of_node_put(np_rx_def);
err2:
of_node_put(np_tx_def);
err1:
of_node_put(np_rx);
err0:
of_node_put(np_tx);
return;
}
static int __init init_console_setup(void)
{
if (need_serial_console) {
pr_info("Adding %s%d as preferred console\n",
CONSOLE_NAME, CONSOLE_IX);
add_preferred_console(CONSOLE_NAME,
CONSOLE_IX,
CONSOLE_OPTIONS);
} else {
struct device_node *np;
static struct property serial_con_status = {
.name = "status",
.value = "disabled",
.length = sizeof("disabled"),
};
np = of_find_node_by_path("/soc/serial@f991e000");
if (!np) {
pr_err("couldn't find /soc/serial@f991e000 node\n");
return -EINVAL;
}
pr_info("disabling %s node", np->full_name);
of_update_property(np, &serial_con_status);
of_node_put(np);
disable_serial_gpio();
}
return 0;
}
early_initcall(init_console_setup);