To prepare the support for sun8i-a83t, create a new function
that handles all the resources needed on sun9i-a80 (because
it will be different from sun8i-a83t).
All the parsing of device tree is moved into this new function:
sun9i_dt_parsing. Create also a function to release the resources
retrieved during the dt parsing in case there is an error in init
function.
Signed-off-by: Mylène Josserand <mylene.josserand@xxxxxxxxxxx>
---
arch/arm/mach-sunxi/mc_smp.c | 99 ++++++++++++++++++++++++++------------------
1 file changed, 58 insertions(+), 41 deletions(-)
diff --git a/arch/arm/mach-sunxi/mc_smp.c b/arch/arm/mach-sunxi/mc_smp.c
index 11e46c6efb90..650a2ad4398f 100644
--- a/arch/arm/mach-sunxi/mc_smp.c
+++ b/arch/arm/mach-sunxi/mc_smp.c
@@ -684,35 +684,22 @@ static int __init sunxi_mc_smp_lookback(void)
return ret;
}
-static int __init sunxi_mc_smp_init(void)
+static int sun9i_dt_parsing(struct resource res)
{
- struct device_node *cpucfg_node, *sram_node, *node;
- struct resource res;
+ struct device_node *prcm_node, *cpucfg_node, *sram_node;
int ret;
- if (!of_machine_is_compatible("allwinner,sun9i-a80"))
- return -ENODEV;
-
- if (!sunxi_mc_smp_cpu_table_init())
- return -EINVAL;
-
- if (!cci_probed()) {
- pr_err("%s: CCI-400 not available\n", __func__);
- return -ENODEV;
- }
-
- node = of_find_compatible_node(NULL, NULL, "allwinner,sun9i-a80-prcm");
- if (!node) {
- pr_err("%s: PRCM not available\n", __func__);
+ prcm_node = of_find_compatible_node(NULL, NULL,
+ "allwinner,sun9i-a80-prcm");
+ if (!prcm_node)
return -ENODEV;
- }
/*
* Unfortunately we can not request the I/O region for the PRCM.
* It is shared with the PRCM clock.
*/
- prcm_base = of_iomap(node, 0);
- of_node_put(node);
+ prcm_base = of_iomap(prcm_node, 0);
+ of_node_put(prcm_node);
if (!prcm_base) {
pr_err("%s: failed to map PRCM registers\n", __func__);
return -ENOMEM;
@@ -748,33 +735,12 @@ static int __init sunxi_mc_smp_init(void)
goto err_put_sram_node;
}
- /* Configure CCI-400 for boot cluster */
- ret = sunxi_mc_smp_lookback();
- if (ret) {
- pr_err("%s: failed to configure boot cluster: %d\n",
- __func__, ret);
- goto err_unmap_release_secure_sram;
- }
-
/* We don't need the CPUCFG and SRAM device nodes anymore */
of_node_put(cpucfg_node);
of_node_put(sram_node);
- /* Set the hardware entry point address */
- writel(__pa_symbol(sunxi_mc_smp_secondary_startup),
- prcm_base + PRCM_CPU_SOFT_ENTRY_REG);
-
- /* Actually enable multi cluster SMP */
- smp_set_ops(&sunxi_mc_smp_smp_ops);
-
- pr_info("sunxi multi cluster SMP support installed\n");
-
return 0;
-err_unmap_release_secure_sram:
- iounmap(sram_b_smp_base);
- of_address_to_resource(sram_node, 0, &res);
- release_mem_region(res.start, resource_size(&res));
err_put_sram_node:
of_node_put(sram_node);
err_unmap_release_cpucfg:
@@ -785,6 +751,57 @@ static int __init sunxi_mc_smp_init(void)
of_node_put(cpucfg_node);
err_unmap_prcm:
iounmap(prcm_base);
+
+ return ret;
+}
+
+static void sun9i_iounmap(void)
+{
+ iounmap(sram_b_smp_base);
+ iounmap(cpucfg_base);
+ iounmap(prcm_base);
+}
+
+static int __init sunxi_mc_smp_init(void)
+{
+ struct resource res;
+ int ret;
+
+ if (!of_machine_is_compatible("allwinner,sun9i-a80"))
+ return -ENODEV;
+
+ if (!sunxi_mc_smp_cpu_table_init())
+ return -EINVAL;
+
+ if (!cci_probed()) {
+ pr_err("%s: CCI-400 not available\n", __func__);
+ return -ENODEV;
+ }
+
+ ret = sun9i_dt_parsing(res);
+ if (ret) {
+ pr_err("%s: failed to parse DT: %d\n", __func__, ret);
+ return ret;
+ }
+
+ /* Configure CCI-400 for boot cluster */
+ ret = sunxi_mc_smp_lookback();
+ if (ret) {
+ pr_err("%s: failed to configure boot cluster: %d\n",
+ __func__, ret);
+ sun9i_iounmap();
+ return ret;
+ }
+
+ /* Set the hardware entry point address */
+ writel(__pa_symbol(sunxi_mc_smp_secondary_startup),
+ prcm_base + PRCM_CPU_SOFT_ENTRY_REG);
+
+ /* Actually enable multi cluster SMP */
+ smp_set_ops(&sunxi_mc_smp_smp_ops);
+
+ pr_info("sunxi multi cluster SMP support installed\n");
+
return ret;
}
--
2.11.0
--
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