[PATCH 05/21] imx9: soc: Change FSB directly access to fuse API

[Peng Fan (OSS)]

From: Ye Li <ye...@nxp.com>

To support OSCCA enabled part which has disabled FSB access from SOC,
change directly read from FSB to use fuse_read API.
Reviewed-by: Peng Fan <peng....@nxp.com>
Signed-off-by: Ye Li <ye...@nxp.com>
Signed-off-by: Peng Fan <peng....@nxp.com>
---
 arch/arm/mach-imx/imx9/soc.c | 26 +++++++++++++++++++++-----
 1 file changed, 21 insertions(+), 5 deletions(-)

diff --git a/arch/arm/mach-imx/imx9/soc.c b/arch/arm/mach-imx/imx9/soc.c
index 7df3c686350..42c6deedbf2 100644
--- a/arch/arm/mach-imx/imx9/soc.c
+++ b/arch/arm/mach-imx/imx9/soc.c
@@ -96,10 +96,14 @@ int mmc_get_env_dev(void)
  */
 u32 get_cpu_speed_grade_hz(void)
 {
+       int ret;
        u32 speed, max_speed;
        u32 val;
 
-       fuse_read(2, 3, &val);
+       ret = fuse_read(2, 3, &val);
+       if (ret)
+               val = 0; /* If read fuse failed, return as blank fuse */
+
        val = FIELD_GET(SPEED_GRADING_MASK, val) & 0xF;
 
        speed = MHZ(2300) - val * MHZ(100);
@@ -122,9 +126,13 @@ u32 get_cpu_speed_grade_hz(void)
  */
 u32 get_cpu_temp_grade(int *minc, int *maxc)
 {
+       int ret;
        u32 val;
 
-       fuse_read(2, 3, &val);
+       ret = fuse_read(2, 3, &val);
+       if (ret)
+               val = 0; /* If read fuse failed, return as blank fuse */
+
        val = FIELD_GET(MARKETING_GRADING_MASK, val);
 
        if (minc && maxc) {
@@ -160,9 +168,17 @@ static void set_cpu_info(struct ele_get_info_data *info)
 
 static u32 get_cpu_variant_type(u32 type)
 {
-       /* word 19 */
-       u32 val = readl((ulong)FSB_BASE_ADDR + 0x8000 + (19 << 2));
-       u32 val2 = readl((ulong)FSB_BASE_ADDR + 0x8000 + (20 << 2));
+       u32 val, val2;
+       int ret;
+
+       ret = fuse_read(2, 3, &val);
+       if (ret)
+               val = 0; /* If read fuse failed, return as blank fuse */
+
+       ret = fuse_read(2, 4, &val2);
+       if (ret)
+               val2 = 0; /* If read fuse failed, return as blank fuse */
+
        bool npu_disable = !!(val & BIT(13));
        bool core1_disable = !!(val & BIT(15));
        u32 pack_9x9_fused = BIT(4) | BIT(17) | BIT(19) | BIT(24);

-- 
2.35.3