[PATCH 1/2] soc: brcmstb: biuctrl: exit without warning on non brcmstb platforms

[Florian Fainelli]

From: Sudeep Holla <sudeep.ho...@arm.com>

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 <computersforpe...@gmail.com>
Cc: Gregory Fong <gregory.0...@gmail.com>
Cc: Florian Fainelli <f.faine...@gmail.com>
Cc: bcm-kernel-feedback-l...@broadcom.com
Fixes: f780429adfbc ("soc: brcmstb: biuctrl: Move to early_initcall")
Signed-off-by: Sudeep Holla <sudeep.ho...@arm.com>
[florian: Add fixes tag, make initcall non fatal]
Signed-off-by: Florian Fainelli <f.faine...@gmail.com>
---
 drivers/soc/bcm/brcmstb/biuctrl.c | 20 +++++++++++---------
 1 file 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) {
-- 
2.14.1