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authorGrant Likely <grant.likely@secretlab.ca>2009-02-03 12:30:25 -0700
committerGrant Likely <grant.likely@secretlab.ca>2009-02-03 12:30:25 -0700
commit3b5ebf8e1ac88babf60772d54bc81b180b5f53b0 (patch)
tree4325e07d1036ecda66d1f3c2e5fb5c7bbaf5341f /drivers/serial/mpc52xx_uart.c
parentb1792e367053968f2ddb48bc911d314143ce6242 (diff)
downloadlinux-3b5ebf8e1ac88babf60772d54bc81b180b5f53b0.tar.bz2
powerpc/5200: Stop using device_type and port-number properties
There is no reason for the PSC UART driver or the Ethernet driver to require a device_type property. The compatible value is sufficient to uniquely identify the device. Remove it from the driver. The whole 'port-number' scheme for assigning numbers to PSC uarts was always rather half baked and just adds complexity. Remove it from the driver. After this patch is applied, PSC UART numbers are simply assigned from the order they are found in the device tree (just like all the other devices). Userspace can query sysfs to determine what ttyPSC number is assigned to each PSC instance. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
Diffstat (limited to 'drivers/serial/mpc52xx_uart.c')
-rw-r--r--drivers/serial/mpc52xx_uart.c38
1 files changed, 10 insertions, 28 deletions
diff --git a/drivers/serial/mpc52xx_uart.c b/drivers/serial/mpc52xx_uart.c
index 0c3a2ab1612c..d73d7da3f304 100644
--- a/drivers/serial/mpc52xx_uart.c
+++ b/drivers/serial/mpc52xx_uart.c
@@ -50,8 +50,8 @@
/* OF Platform device Usage :
*
* This driver is only used for PSCs configured in uart mode. The device
- * tree will have a node for each PSC in uart mode w/ device_type = "serial"
- * and "mpc52xx-psc-uart" in the compatible string
+ * tree will have a node for each PSC with "mpc52xx-psc-uart" in the compatible
+ * list.
*
* By default, PSC devices are enumerated in the order they are found. However
* a particular PSC number can be forces by adding 'device_no = <port#>'
@@ -1212,30 +1212,18 @@ mpc52xx_uart_of_resume(struct of_device *op)
#endif
static void
-mpc52xx_uart_of_assign(struct device_node *np, int idx)
+mpc52xx_uart_of_assign(struct device_node *np)
{
- int free_idx = -1;
int i;
- /* Find the first free node */
+ /* Find the first free PSC number */
for (i = 0; i < MPC52xx_PSC_MAXNUM; i++) {
if (mpc52xx_uart_nodes[i] == NULL) {
- free_idx = i;
- break;
+ of_node_get(np);
+ mpc52xx_uart_nodes[i] = np;
+ return;
}
}
-
- if ((idx < 0) || (idx >= MPC52xx_PSC_MAXNUM))
- idx = free_idx;
-
- if (idx < 0)
- return; /* No free slot; abort */
-
- of_node_get(np);
- /* If the slot is already occupied, then swap slots */
- if (mpc52xx_uart_nodes[idx] && (free_idx != -1))
- mpc52xx_uart_nodes[free_idx] = mpc52xx_uart_nodes[idx];
- mpc52xx_uart_nodes[idx] = np;
}
static void
@@ -1243,23 +1231,17 @@ mpc52xx_uart_of_enumerate(void)
{
static int enum_done;
struct device_node *np;
- const unsigned int *devno;
const struct of_device_id *match;
int i;
if (enum_done)
return;
- for_each_node_by_type(np, "serial") {
+ /* Assign index to each PSC in device tree */
+ for_each_matching_node(np, mpc52xx_uart_of_match) {
match = of_match_node(mpc52xx_uart_of_match, np);
- if (!match)
- continue;
-
psc_ops = match->data;
-
- /* Is a particular device number requested? */
- devno = of_get_property(np, "port-number", NULL);
- mpc52xx_uart_of_assign(np, devno ? *devno : -1);
+ mpc52xx_uart_of_assign(np);
}
enum_done = 1;