i.MX7ULP: Change clock rate calculation for NIC1 BUS and EXT
On i.MX7ULP B0, there is change in NIC clock dividers architecture.
On A0, the NIC1 BUS and EXT dividers were in a chain with NIC1 DIV, but
on B0 they are parallel with NIC1 DIV. So now the dividers are independent.
This patch modifies the scg_nic_get_rate function according to this change.
Signed-off-by: Ye Li <ye.li@nxp.com>
Acked-by: Peng Fan <peng.fan@nxp.com>
diff --git a/arch/arm/mach-imx/mx7ulp/scg.c b/arch/arm/mach-imx/mx7ulp/scg.c
index 0d31352..819c90a 100644
--- a/arch/arm/mach-imx/mx7ulp/scg.c
+++ b/arch/arm/mach-imx/mx7ulp/scg.c
@@ -352,7 +352,7 @@
static u32 scg_nic_get_rate(enum scg_clk clk)
{
- u32 reg, val, rate;
+ u32 reg, val, rate, nic0_rate;
u32 shift, mask;
reg = readl(&scg1_regs->niccsr);
@@ -370,6 +370,7 @@
val = (reg & SCG_NICCSR_NIC0DIV_MASK) >> SCG_NICCSR_NIC0DIV_SHIFT;
rate = rate / (val + 1);
+ nic0_rate = rate;
clk_debug("scg_nic_get_rate NIC0 rate %u\n", rate);
@@ -411,6 +412,13 @@
return 0;
}
+ /*
+ * On RevB, the nic_bus and nic_ext dividers are parallel
+ * not chained with nic div
+ */
+ if (soc_rev() >= CHIP_REV_2_0)
+ rate = nic0_rate;
+
val = (reg & mask) >> shift;
rate = rate / (val + 1);