net: ethernet: stmmac: add management of clk_csr property

In Documentation stmmac.txt there is possibility to
fixed CSR Clock range selection with property clk_csr.
This patch add the management of this property
For example to use it, add in your ethernet node DT:
	clk_csr = <3>;

Signed-off-by: Christophe Roullier <christophe.roullier@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 2b800ce1d5bf42ca23b378d4b9c8c35addc41da9..3031f2bf15d6592ea5cd3f749db01ab189bc43ea 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -408,6 +408,9 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
        /* Default to phy auto-detection */
        plat->phy_addr = -1;
 
+       /* Get clk_csr from device tree */
+       of_property_read_u32(np, "clk_csr", &plat->clk_csr);
+
        /* "snps,phy-addr" is not a standard property. Mark it as deprecated
         * and warn of its use. Remove this when phy node support is added.
         */