[PATCH v2 05/11] clk: en7523: define and register SoC SCU SSR driver for EN7581

Christian Marangi
2025-03-20T13:01:41Z

Define all the possible interface modes and register the SoC SCU SSR
platform driver for EN7581.

Failing to register the SCU SSR driver is not a critical error (example
the SoC driver is not enable) but will prevent PCIe or USB port to
function correctly.

Reference to the SSR pdev are stored in the new en7523 priv struct.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
drivers/clk/clk-en7523.c | 99 ++++++++++++++++++++++++++++++++--
include/linux/clk/clk-en7523.h | 10 ++++
2 files changed, 106 insertions(+), 3 deletions(-)
create mode 100644 include/linux/clk/clk-en7523.h

diff --git a/drivers/clk/clk-en7523.c b/drivers/clk/clk-en7523.c
index 2a74bc8fed24..1f11fa769090 100644
--- a/drivers/clk/clk-en7523.c
+++ b/drivers/clk/clk-en7523.c
@@ -3,14 +3,17 @@
#include <linux/bitfield.h>
#include <linux/delay.h>
#include <linux/clk-provider.h>
+#include <linux/clk/clk-en7523.h>
#include <linux/io.h>
#include <linux/mfd/syscon.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/reset-controller.h>
+#include <linux/soc/airoha/airoha-scu-ssr.h>
#include <dt-bindings/clock/en7523-clk.h>
#include <dt-bindings/reset/airoha,en7581-reset.h>
+#include <dt-bindings/soc/airoha,scu-ssr.h>

#define RST_NR_PER_BANK 32

@@ -81,6 +84,7 @@ struct en_clk_soc_data {
const struct en_clk_desc *base_clks;
const struct clk_ops pcie_ops;
int (*hw_init)(struct platform_device *pdev,
+ struct en_clk_priv *priv,
const struct en_clk_soc_data *soc_data,
struct clk_hw_onecell_data *clk_data);
};
@@ -361,6 +365,51 @@ static const u16 en7581_rst_map[] = {
[EN7581_XPON_MAC_RST] = RST_NR_PER_BANK + 31,
};

+static unsigned int an7581_serdes_wifi1_possible_modes[] = {
+ AIROHA_SCU_SERDES_MODE_PCIE0_X1,
+ AIROHA_SCU_SERDES_MODE_PCIE0_X2,
+ AIROHA_SCU_SERDES_MODE_ETHERNET,
+};
+
+static unsigned int an7581_serdes_wifi2_possible_modes[] = {
+ AIROHA_SCU_SERDES_MODE_PCIE1_X1,
+ AIROHA_SCU_SERDES_MODE_PCIE0_X2,
+ AIROHA_SCU_SERDES_MODE_ETHERNET,
+};
+
+static unsigned int an7581_serdes_usb1_possible_modes[] = {
+ AIROHA_SCU_SERDES_MODE_USB3,
+ AIROHA_SCU_SERDES_MODE_ETHERNET,
+};
+
+static unsigned int an7581_serdes_usb2_possible_modes[] = {
+ AIROHA_SCU_SERDES_MODE_PCIE2_X1,
+ AIROHA_SCU_SERDES_MODE_ETHERNET,
+};
+
+static const struct airoha_scu_ssr_serdes_info an7581_ports_info[] = {
+ [AIROHA_SCU_SERDES_WIFI1] = {
+ .possible_modes = an7581_serdes_wifi1_possible_modes,
+ .num_modes = ARRAY_SIZE(an7581_serdes_wifi1_possible_modes),
+ },
+ [AIROHA_SCU_SERDES_WIFI2] = {
+ .possible_modes = an7581_serdes_wifi2_possible_modes,
+ .num_modes = ARRAY_SIZE(an7581_serdes_wifi2_possible_modes),
+ },
+ [AIROHA_SCU_SERDES_USB1] = {
+ .possible_modes = an7581_serdes_usb1_possible_modes,
+ .num_modes = ARRAY_SIZE(an7581_serdes_usb1_possible_modes),
+ },
+ [AIROHA_SCU_SERDES_USB2] = {
+ .possible_modes = an7581_serdes_usb2_possible_modes,
+ .num_modes = ARRAY_SIZE(an7581_serdes_usb2_possible_modes),
+ },
+};
+
+static const struct airoha_scu_ssr_data an7581_scu_ssr_data = {
+ .ports_info = an7581_ports_info,
+};
+
static u32 en7523_get_base_rate(const struct en_clk_desc *desc, u32 val)
{
if (!desc->base_bits)
@@ -557,6 +606,7 @@ static const struct regmap_config en7523_clk_regmap_config = {
};

static int en7523_clk_hw_init(struct platform_device *pdev,
+ struct en_clk_priv *priv,
const struct en_clk_soc_data *soc_data,
struct clk_hw_onecell_data *clk_data)
{
@@ -661,12 +711,38 @@ static int en7581_reset_register(struct device *dev, struct regmap *map)
return devm_reset_controller_register(dev, &rst_data->rcdev);
}

+static void en7581_clk_register_ssr(struct platform_device *pdev,
+ struct en_clk_priv *priv)
+{
+ struct platform_device_info pinfo = { };
+ struct platform_device *ssr_pdev;
+
+ pinfo.name = "airoha-scu-ssr";
+ pinfo.parent = &pdev->dev;
+ pinfo.id = PLATFORM_DEVID_AUTO;
+ pinfo.fwnode = of_fwnode_handle(pdev->dev.of_node);
+ pinfo.of_node_reused = true;
+ pinfo.data = &an7581_scu_ssr_data;
+ pinfo.size_data = sizeof(an7581_scu_ssr_data);
+
+ ssr_pdev = platform_device_register_data(&pdev->dev, "airoha-scu-ssr",
+ PLATFORM_DEVID_AUTO,
+ &an7581_scu_ssr_data,
+ sizeof(an7581_scu_ssr_data));
+ if (IS_ERR(ssr_pdev))
+ dev_warn_probe(&pdev->dev, PTR_ERR(ssr_pdev), "failed to register SCU SSR driver.\n");
+
+ priv->ssr_pdev = ssr_pdev;
+}
+
static int en7581_clk_hw_init(struct platform_device *pdev,
+ struct en_clk_priv *priv,
const struct en_clk_soc_data *soc_data,
struct clk_hw_onecell_data *clk_data)
{
struct regmap *map, *clk_map;
void __iomem *base;
+ int ret;

map = syscon_regmap_lookup_by_compatible("airoha,en7581-chip-scu");
if (IS_ERR(map))
@@ -687,7 +763,13 @@ static int en7581_clk_hw_init(struct platform_device *pdev,
regmap_update_bits(clk_map, REG_NP_SCU_PCIC, REG_PCIE_CTRL,
FIELD_PREP(REG_PCIE_CTRL, 3));

- return en7581_reset_register(&pdev->dev, clk_map);
+ ret = en7581_reset_register(&pdev->dev, clk_map);
+ if (ret)
+ return ret;
+
+ en7581_clk_register_ssr(pdev, priv);
+
+ return 0;
}

static int en7523_clk_probe(struct platform_device *pdev)
@@ -695,10 +777,15 @@ static int en7523_clk_probe(struct platform_device *pdev)
struct device_node *node = pdev->dev.of_node;
const struct en_clk_soc_data *soc_data;
struct clk_hw_onecell_data *clk_data;
+ struct en_clk_priv *priv;
int r;

soc_data = device_get_match_data(&pdev->dev);

+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
clk_data = devm_kzalloc(&pdev->dev,
struct_size(clk_data, hws, soc_data->num_clocks),
GFP_KERNEL);
@@ -706,11 +793,17 @@ static int en7523_clk_probe(struct platform_device *pdev)
return -ENOMEM;

clk_data->num = soc_data->num_clocks;
- r = soc_data->hw_init(pdev, soc_data, clk_data);
+ r = soc_data->hw_init(pdev, priv, soc_data, clk_data);
if (r)
return r;

- return of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
+ r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
+ if (r)
+ return r;
+
+ platform_set_drvdata(pdev, priv);
+
+ return 0;
}

static const struct en_clk_soc_data en7523_data = {
diff --git a/include/linux/clk/clk-en7523.h b/include/linux/clk/clk-en7523.h
new file mode 100644
index 000000000000..fc3b320dc7e9
--- /dev/null
+++ b/include/linux/clk/clk-en7523.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef __LINUX_CLK_EN7523_H_
+#define __LINUX_CLK_EN7523_H_
+
+struct en_clk_priv {
+ struct platform_device *ssr_pdev;
+};
+
+#endif
--
2.48.1