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>

diff --git a/drivers/soc/bcm/brcmstb/biuctrl.c b/drivers/soc/bcm/brcmstb/biuctrl.c
index 2b23ae7..6d89ebf 100644 (file)
--- 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) {