On Broadcom Brahma-B53 CPUs, the CPU_CREDIT_REG offset got moved to 0x0b0 instead of 0x184, correct this such that we correcty enable/disable write-pairing for these chips.
Signed-off-by: Florian Fainelli <[email protected]> --- drivers/soc/bcm/brcmstb/biuctrl.c | 24 +++++++++++++++++++++--- 1 file changed, 21 insertions(+), 3 deletions(-) diff --git a/drivers/soc/bcm/brcmstb/biuctrl.c b/drivers/soc/bcm/brcmstb/biuctrl.c index c3c548fcaa8c..e8322e663831 100644 --- a/drivers/soc/bcm/brcmstb/biuctrl.c +++ b/drivers/soc/bcm/brcmstb/biuctrl.c @@ -21,12 +21,13 @@ #include <linux/syscore_ops.h> #include <linux/soc/brcmstb/brcmstb.h> -#define CPU_CREDIT_REG_OFFSET 0x184 +#define B15_CPU_CREDIT_REG_OFFSET 0x184 +#define B53_CPU_CREDIT_REG_OFFSET 0x0b0 #define CPU_CREDIT_REG_MCPx_WR_PAIRING_EN_MASK 0x70000000 static void __iomem *cpubiuctrl_base; static bool mcp_wr_pairing_en; -static unsigned int cpu_credit_reg_offset = CPU_CREDIT_REG_OFFSET; +static unsigned int cpu_credit_reg_offset; static int __init mcp_write_pairing_set(void) { @@ -53,7 +54,7 @@ static int __init mcp_write_pairing_set(void) static int __init setup_hifcpubiuctrl_regs(void) { - struct device_node *np; + struct device_node *np, *cpu_dn; int ret = 0; np = of_find_compatible_node(NULL, NULL, "brcm,brcmstb-cpu-biu-ctrl"); @@ -70,6 +71,23 @@ static int __init setup_hifcpubiuctrl_regs(void) } mcp_wr_pairing_en = of_property_read_bool(np, "brcm,write-pairing"); + + cpu_dn = of_get_cpu_node(0, NULL); + if (!cpu_dn) { + pr_err("failed to obtain CPU device node\n"); + ret = -ENODEV; + goto out; + } + + if (of_device_is_compatible(cpu_dn, "brcm,brahma-b15")) + cpu_credit_reg_offset = B15_CPU_CREDIT_REG_OFFSET; + else if (of_device_is_compatible(cpu_dn, "brcm,brahma-b53")) + cpu_credit_reg_offset = B53_CPU_CREDIT_REG_OFFSET; + else { + pr_err("unsupported CPU\n"); + ret = -EINVAL; + } + of_node_put(cpu_dn); out: of_node_put(np); return ret; -- 2.9.3
