soc: brcmstb: biuctrl: exit without warning on non brcmstb platforms

Currently if this driver is included, we get the following warning
on any platforms irrespective of whether it's brcmstb platform or not.
"
 brcmstb: biuctrl: missing BIU control node
 brcmstb: biuctrl: MCP: Unable to disable write pairing!
"

This patch allows to exit early without any warning messages on non
brcmstb platforms as it's meaningless for them.

Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Gregory Fong <gregory.0xf0@gmail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: bcm-kernel-feedback-list@broadcom.com
Fixes: f780429adfbc ("soc: brcmstb: biuctrl: Move to early_initcall")
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
[florian: Add fixes tag, make initcall non fatal]
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 11 insertions, 9 deletions

diff --git a/drivers/soc/bcm/brcmstb/biuctrl.c b/drivers/soc/bcm/brcmstb/biuctrl.c
index 2b23ae7b5e9b..6d89ebf13b8a 100644
--- a/drivers/soc/bcm/brcmstb/biuctrl.c
+++ b/drivers/soc/bcm/brcmstb/biuctrl.c
@@ -162,17 +162,11 @@ static void __init mcp_b53_set(void)
         cbc_writel(reg, CPU_WRITEBACK_CTRL_REG);
 }
 
-static int __init setup_hifcpubiuctrl_regs(void)
+static int __init setup_hifcpubiuctrl_regs(struct device_node *np)
 {
-        struct device_node *np, *cpu_dn;
+        struct device_node *cpu_dn;
         int ret = 0;
 
-        np = of_find_compatible_node(NULL, NULL, "brcm,brcmstb-cpu-biu-ctrl");
-        if (!np) {
-                pr_err("missing BIU control node\n");
-                return -ENODEV;
-        }
-
         cpubiuctrl_base = of_iomap(np, 0);
         if (!cpubiuctrl_base) {
                 pr_err("failed to remap BIU control base\n");
@@ -242,9 +236,17 @@ static struct syscore_ops brcmstb_cpu_credit_syscore_ops = {
 
 static int __init brcmstb_biuctrl_init(void)
 {
+        struct device_node *np;
         int ret;
 
-        setup_hifcpubiuctrl_regs();
+        /* We might be running on a multi-platform kernel, don't make this a
+         * fatal error, just bail out early
+         */
+        np = of_find_compatible_node(NULL, NULL, "brcm,brcmstb-cpu-biu-ctrl");
+        if (!np)
+                return 0;
+
+        setup_hifcpubiuctrl_regs(np);
 
         ret = mcp_write_pairing_set();
         if (ret) {