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i.MX7ULP: Change clock rate calculation for NIC1 BUS and EXT

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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>
This commit is contained in:
Ye Li 2019-07-22 01:25:10 +00:00 committed by Stefano Babic
parent df3572e930
commit 971a71e114
1 changed files with 9 additions and 1 deletions
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10
arch/arm/mach-imx/mx7ulp/scg.c
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@ -352,7 +352,7 @@ static u32 scg_ddr_get_rate(void)
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 @@ static u32 scg_nic_get_rate(enum scg_clk clk)
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 @@ static u32 scg_nic_get_rate(enum scg_clk clk)
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);