Re: [PATCH net-next v2 9/9] net: stmmac: qcom-ethqos: add Shikra EMAC support

Shikra integrates two Qualcomm ETHQOS controllers based on the Synopsys
GMAC IP, similar to previous platforms.  Register qcom,shikra-ethqos
backed by a new shikra_data descriptor that enables the three NOC clocks
required for DMA memory access (axi-noc, pcie-tile-axi-noc, stmmaceth)
all at 120 MHz, and the 36-bit DMA address width.

As part of the NOC clock voting logic, the qcom-ethqos glue driver takes
a second enable reference on the "stmmaceth" clock, which is already
enabled by the stmmac core. All three clocks in shikra_noc_clks[] must
run at 120 MHz for NOC access, and managing "stmmaceth" through the same
clk_bulk path keeps the rate-setting and enable/disable together.

Signed-off-by: Mohd Ayaan Anwar <mohd.anwar@oss.qualcomm.com>
---
 .../ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c    | 31 ++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index 8871d285941162c72e2a8f79d2eef915d9283796..c474f1e5a043777a52bcbff8a488640f6dbdca30 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c

@@ -328,6 +328,36 @@ static const struct ethqos_emac_driver_data emac_v4_0_0_data = {
 	},
 };
 
+static const struct ethqos_noc_clk_cfg shikra_noc_clks[] = {
+	{ "axi-noc", 120000000 },
+	{ "pcie-tile-axi-noc", 120000000 },
+	{ "stmmaceth", 120000000 },
+};