powerpc/mpc85xx: Enabling CPC conditionally based on hwconfig options
If hwconfig does not contains "en_cpc" then by default all cpcs are enabled
If this config is defined then only those individual cpcs which are defined
in the subargument of "en_cpc" will be enabled e.g en_cpc:cpc1,cpc2; (this
will enable cpc1 and cpc2) or en_cpc:cpc2; (this enables just cpc2)
Signed-off-by: Shaveta Leekha <shaveta@freescale.com>
Signed-off-by: Sandeep Singh <Sandeep@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init.c b/arch/powerpc/cpu/mpc85xx/cpu_init.c
index b237505..5bfab70 100644
--- a/arch/powerpc/cpu/mpc85xx/cpu_init.c
+++ b/arch/powerpc/cpu/mpc85xx/cpu_init.c
@@ -254,12 +254,36 @@
void enable_cpc(void)
{
int i;
+ int ret;
u32 size = 0;
-
+ u32 cpccfg0;
+ char buffer[HWCONFIG_BUFFER_SIZE];
+ char cpc_subarg[16];
+ bool have_hwconfig = false;
+ int cpc_args = 0;
cpc_corenet_t *cpc = (cpc_corenet_t *)CONFIG_SYS_FSL_CPC_ADDR;
+ /* Extract hwconfig from environment */
+ ret = getenv_f("hwconfig", buffer, sizeof(buffer));
+ if (ret > 0) {
+ /*
+ * If "en_cpc" is not defined in hwconfig then by default all
+ * cpcs are enable. If this config is defined then individual
+ * cpcs which have to be enabled should also be defined.
+ * e.g en_cpc:cpc1,cpc2;
+ */
+ if (hwconfig_f("en_cpc", buffer))
+ have_hwconfig = true;
+ }
+
for (i = 0; i < CONFIG_SYS_NUM_CPC; i++, cpc++) {
- u32 cpccfg0 = in_be32(&cpc->cpccfg0);
+ if (have_hwconfig) {
+ sprintf(cpc_subarg, "cpc%u", i + 1);
+ cpc_args = hwconfig_sub_f("en_cpc", cpc_subarg, buffer);
+ if (cpc_args == 0)
+ continue;
+ }
+ cpccfg0 = in_be32(&cpc->cpccfg0);
size += CPC_CFG0_SZ_K(cpccfg0);
#ifdef CONFIG_SYS_FSL_ERRATUM_CPC_A002