net: dwc_eth_qos: add Kconfig option to select supported configuration

Add configuration flag to select the supported dwc driver configuration:
- CONFIG_DWC_ETH_QOS_TEGRA186
- CONFIG_DWC_ETH_QOS_IMX
- CONFIG_DWC_ETH_QOS_STM32

See Linux driver ethernet/stmicro/stmmac and associated glue layers
for other configuration examples.

This patch removes the not-selected compatibles and lets the linker remove
the unused functions to reduce the size of the driver.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 15030b81651d176904bfd435b7a20a34bf321efa..ecd779d979e4b0c847d978f7c764bcd64cec4fcf 100644 (file)
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -156,9 +156,30 @@ config DWC_ETH_QOS
        help
          This driver supports the Synopsys Designware Ethernet QOS (Quality
          Of Service) IP block. The IP supports many options for bus type,
-         clocking/reset structure, and feature list. This driver currently
-         supports the specific configuration used in NVIDIA's Tegra186 chip,
-         but should be extensible to other combinations quite easily.
+         clocking/reset structure, and feature list.
+
+config DWC_ETH_QOS_IMX
+       bool "Synopsys DWC Ethernet QOS device support for IMX"
+       depends on DWC_ETH_QOS
+       help
+         The Synopsys Designware Ethernet QOS IP block with the specific
+         configuration used in IMX soc.
+
+config DWC_ETH_QOS_STM32
+       bool "Synopsys DWC Ethernet QOS device support for STM32"
+       depends on DWC_ETH_QOS
+       default y if ARCH_STM32MP
+       help
+         The Synopsys Designware Ethernet QOS IP block with the specific
+         configuration used in STM32MP soc.
+
+config DWC_ETH_QOS_TEGRA186
+       bool "Synopsys DWC Ethernet QOS device support for TEGRA186"
+       depends on DWC_ETH_QOS
+       default y if TEGRA186
+       help
+         The Synopsys Designware Ethernet QOS IP block with specific
+         configuration used in NVIDIA's Tegra186 chip.
 
 config E1000
        bool "Intel PRO/1000 Gigabit Ethernet support"

diff --git a/drivers/net/dwc_eth_qos.c b/drivers/net/dwc_eth_qos.c
index 1d9eefbb3e80f0c4853a64e38a319918fd5cf868..810a2b95b19eec7602b609e10d6a856316b48b49 100644 (file)
--- a/drivers/net/dwc_eth_qos.c
+++ b/drivers/net/dwc_eth_qos.c
@@ -2100,7 +2100,7 @@ static struct eqos_ops eqos_tegra186_ops = {
        .eqos_get_tick_clk_rate = eqos_get_tick_clk_rate_tegra186
 };
 
-static const struct eqos_config eqos_tegra186_config = {
+static const struct eqos_config __maybe_unused eqos_tegra186_config = {
        .reg_access_always_ok = false,
        .mdio_wait = 10,
        .swr_wait = 10,
@@ -2127,7 +2127,7 @@ static struct eqos_ops eqos_stm32_ops = {
        .eqos_get_tick_clk_rate = eqos_get_tick_clk_rate_stm32
 };
 
-static const struct eqos_config eqos_stm32_config = {
+static const struct eqos_config __maybe_unused eqos_stm32_config = {
        .reg_access_always_ok = false,
        .mdio_wait = 10000,
        .swr_wait = 50,
@@ -2154,7 +2154,7 @@ static struct eqos_ops eqos_imx_ops = {
        .eqos_get_tick_clk_rate = eqos_get_tick_clk_rate_imx
 };
 
-struct eqos_config eqos_imx_config = {
+struct eqos_config __maybe_unused eqos_imx_config = {
        .reg_access_always_ok = false,
        .mdio_wait = 10000,
        .swr_wait = 50,
@@ -2165,18 +2165,24 @@ struct eqos_config eqos_imx_config = {
 };
 
 static const struct udevice_id eqos_ids[] = {
+#if IS_ENABLED(CONFIG_DWC_ETH_QOS_TEGRA186)
        {
                .compatible = "nvidia,tegra186-eqos",
                .data = (ulong)&eqos_tegra186_config
        },
+#endif
+#if IS_ENABLED(CONFIG_DWC_ETH_QOS_STM32)
        {
                .compatible = "st,stm32mp1-dwmac",
                .data = (ulong)&eqos_stm32_config
        },
+#endif
+#if IS_ENABLED(CONFIG_DWC_ETH_QOS_IMX)
        {
                .compatible = "fsl,imx-eqos",
                .data = (ulong)&eqos_imx_config
        },
+#endif
 
        { }
 };