[PATCH v1 14/16] clk: starfive: Add JH8100 Always-On clock generator driver
From: Sia Jee Heng
Date: Wed Dec 06 2023 - 06:53:30 EST
Add support for JH8100 Always-On clock generator.
Signed-off-by: Sia Jee Heng <jeeheng.sia@xxxxxxxxxxxxxxxx>
Reviewed-by: Ley Foon Tan <leyfoon.tan@xxxxxxxxxxxxxxxx>
---
drivers/clk/starfive/Kconfig | 8 +
drivers/clk/starfive/jh8100/Makefile | 1 +
drivers/clk/starfive/jh8100/clk-aon.c | 275 ++++++++++++++++++++++++++
3 files changed, 284 insertions(+)
create mode 100644 drivers/clk/starfive/jh8100/clk-aon.c
diff --git a/drivers/clk/starfive/Kconfig b/drivers/clk/starfive/Kconfig
index 2d8a1e0fae8a..7a8bb958f915 100644
--- a/drivers/clk/starfive/Kconfig
+++ b/drivers/clk/starfive/Kconfig
@@ -105,3 +105,11 @@ config CLK_STARFIVE_JH8100_SYS_SW
help
Say yes here to support the System-South-West clock controller on the StarFive JH8100
SoC.
+
+config CLK_STARFIVE_JH8100_AON
+ bool "StarFive JH8100 Always-On clock support"
+ depends on CLK_STARFIVE_JH8100_SYS
+ default ARCH_STARFIVE
+ help
+ Say yes here to support the Always-On clock controller on the StarFive JH8100
+ SoC.
diff --git a/drivers/clk/starfive/jh8100/Makefile b/drivers/clk/starfive/jh8100/Makefile
index 5c14bff5c541..1decc43de0d3 100644
--- a/drivers/clk/starfive/jh8100/Makefile
+++ b/drivers/clk/starfive/jh8100/Makefile
@@ -4,3 +4,4 @@ obj-$(CONFIG_CLK_STARFIVE_JH8100_SYS) += clk-sys.o
obj-$(CONFIG_CLK_STARFIVE_JH8100_SYS_NW) += clk-sys-nw.o
obj-$(CONFIG_CLK_STARFIVE_JH8100_SYS_NE) += clk-sys-ne.o
obj-$(CONFIG_CLK_STARFIVE_JH8100_SYS_SW) += clk-sys-sw.o
+obj-$(CONFIG_CLK_STARFIVE_JH8100_AON) += clk-aon.o
diff --git a/drivers/clk/starfive/jh8100/clk-aon.c b/drivers/clk/starfive/jh8100/clk-aon.c
new file mode 100644
index 000000000000..95c10d5a9552
--- /dev/null
+++ b/drivers/clk/starfive/jh8100/clk-aon.c
@@ -0,0 +1,275 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * StarFive JH8100 System Clock Driver
+ *
+ * Copyright (C) 2023 StarFive Technology Co., Ltd.
+ *
+ * Author: Jee Heng Sia <jeeheng.sia@xxxxxxxxxxxxxxxx>
+ *
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <dt-bindings/clock/starfive,jh8100-crg.h>
+
+#include "clk-starfive-jh8100.h"
+
+/* external clocks */
+#define AONCRG_CLK_OSC (AONCRG_CLK_END + 0)
+#define AONCRG_CLK_GMAC0_RMII_FUNC (AONCRG_CLK_END + 1)
+#define AONCRG_CLK_AON_50 (AONCRG_CLK_END + 2)
+#define AONCRG_CLK_GMAC0_RGMII_FUNC (AONCRG_CLK_END + 3)
+#define AONCRG_CLK_AON_125 (AONCRG_CLK_END + 4)
+#define AONCRG_CLK_AON_2000 (AONCRG_CLK_END + 5)
+#define AONCRG_CLK_AON_200 (AONCRG_CLK_END + 6)
+#define AONCRG_CLK_AON_667 (AONCRG_CLK_END + 7)
+#define AONCRG_CLK_RTC (AONCRG_CLK_END + 8)
+
+static const struct starfive_clk_data jh8100_aoncrg_clk_data[] = {
+ /* source */
+ STARFIVE__MUX(AONCRG_CLK_GMAC0_RMII_REFIN, "aon_clk_gmac0_rmii_refin", 2,
+ AONCRG_CLK_GMAC0_RMII_FUNC, AONCRG_CLK_AON_50),
+ STARFIVE__MUX(AONCRG_CLK_GMAC0_RGMII_RXIN, "aon_clk_gmac0_rgmii_rxin", 2,
+ AONCRG_CLK_GMAC0_RGMII_FUNC, AONCRG_CLK_AON_125),
+ STARFIVE__DIV(AONCRG_CLK_GMAC0_GTXCLK, "aon_clk_gmac0_gtxclk", 50,
+ AONCRG_CLK_AON_125),
+ STARFIVE__DIV(AONCRG_CLK_AON_1000, "aon_clk_aon_1000", 2,
+ AONCRG_CLK_AON_2000),
+ STARFIVE__DIV(AONCRG_CLK_AON_400, "aon_clk_aon_400", 5,
+ AONCRG_CLK_AON_2000),
+ STARFIVE__MUX(AONCRG_CLK_AON_400_POSTOSC, "aon_clk_aon_400_postosc", 2,
+ AONCRG_CLK_OSC, AONCRG_CLK_AON_400),
+ STARFIVE__DIV(AONCRG_CLK_AON_500, "aon_clk_aon_500", 4,
+ AONCRG_CLK_AON_2000),
+ STARFIVE__MUX(AONCRG_CLK_AON_500_POSTOSC, "aon_clk_aon_500_postosc", 2,
+ AONCRG_CLK_OSC, AONCRG_CLK_AON_500),
+ STARFIVE__DIV(AONCRG_CLK_XSPI_PHY, "aon_clk_xspi_phy", 4,
+ AONCRG_CLK_AON_200),
+ STARFIVE__DIV(AONCRG_CLK_AON_100, "aon_clk_aon_100", 2,
+ AONCRG_CLK_AON_200),
+ STARFIVE__MUX(AONCRG_CLK_AON_100_POSTOSC, "aon_clk_aon_100_postosc", 2,
+ AONCRG_CLK_OSC, AONCRG_CLK_AON_100),
+ STARFIVE__MUX(AONCRG_CLK_AON_50_POSTOSC, "aon_clk_aon_50_postosc", 2,
+ AONCRG_CLK_OSC, AONCRG_CLK_AON_50),
+ STARFIVE_GATE(AONCRG_CLK_DDR50_POSTOCC_ICG, "aon_clk_ddr50_postocc", CLK_IS_CRITICAL,
+ AONCRG_CLK_AON_50_POSTOSC),
+ STARFIVE_GATE(AONCRG_CLK_DDR100_POSTOCC_ICG, "aon_clk_ddr100_postocc", CLK_IS_CRITICAL,
+ AONCRG_CLK_AON_100),
+ /* pufrt */
+ STARFIVE_GATE(AONCRG_CLK_PUFRT_APB, "aon_clk_pufrt_apb", CLK_IS_CRITICAL,
+ AONCRG_CLK_OSC),
+ /* rtc hms */
+ STARFIVE_GATE(AONCRG_CLK_RTC_HMS_APB, "aon_clk_rtc_hms_apb", 0,
+ AONCRG_CLK_OSC),
+ STARFIVE__DIV(AONCRG_CLK_RTC_INTERNAL, "aon_clk_rtc_internal", 1020,
+ AONCRG_CLK_OSC),
+ STARFIVE__MUX(AONCRG_CLK_RTC_HMS_OSC32K, "aon_clk_rtc_hms_osc32k", 2,
+ AONCRG_CLK_RTC, AONCRG_CLK_RTC_INTERNAL),
+ STARFIVE_GATE(AONCRG_CLK_RTC_HMS_CAL, "aon_clk_rtc_hms_cal", 0,
+ AONCRG_CLK_OSC),
+ /* gmac5_axi128 */
+ STARFIVE_GATE(AONCRG_CLK_GMAC0_AXI128_AHB, "aon_clk_gmac0_axi128_ahb",
+ CLK_IGNORE_UNUSED, AONCRG_CLK_AON_200),
+ STARFIVE_GATE(AONCRG_CLK_GMAC0_AXI128_MSTRCLK, "aon_clk_gmac0_axi128_mstrclk",
+ CLK_IGNORE_UNUSED, AONCRG_CLK_AON_667),
+ STARFIVE_GATE(AONCRG_CLK_GMAC0_AXI128_AXI, "aon_clk_gmac0_axi128_axi",
+ CLK_IGNORE_UNUSED, AONCRG_CLK_AON_400_POSTOSC),
+ STARFIVE__DIV(AONCRG_CLK_GMAC0_RMII_RTX, "aon_clk_gmac0_rmii_rtx", 30,
+ AONCRG_CLK_GMAC0_RMII_REFIN),
+ STARFIVE_GMUX(AONCRG_CLK_GMAC0_AXI128_TX, "aon_clk_gmac0_axi128_tx",
+ CLK_IGNORE_UNUSED, 2, AONCRG_CLK_GMAC0_GTXCLK,
+ AONCRG_CLK_GMAC0_RMII_RTX),
+ STARFIVE_GINV(AONCRG_CLK_GMAC0_AXI128_TX_INV, "aon_clk_gmac0_axi128_tx_inv",
+ CLK_IGNORE_UNUSED, AONCRG_CLK_GMAC0_AXI128_TX),
+ STARFIVE__MUX(AONCRG_CLK_GMAC0_AXI128_RX, "aon_clk_gmac0_axi128_rx", 2,
+ AONCRG_CLK_GMAC0_RGMII_RXIN, AONCRG_CLK_GMAC0_RMII_RTX),
+ STARFIVE__INV(AONCRG_CLK_GMAC0_AXI128_RX_INV, "aon_clk_gmac0_axi128_rx_inv",
+ AONCRG_CLK_GMAC0_AXI128_RX),
+ STARFIVE_GATE(AONCRG_CLK_GMAC0_GTXC, "aon_clk_gmac0_gtxc", CLK_IGNORE_UNUSED,
+ AONCRG_CLK_GMAC0_GTXCLK),
+ /* xspi */
+ STARFIVE_GATE(AONCRG_CLK_XSPI_AXI, "aon_clk_xspi_axi", CLK_IGNORE_UNUSED,
+ AONCRG_CLK_AON_200),
+ STARFIVE_GATE(AONCRG_CLK_XSPI_APB, "aon_clk_xspi_apb", CLK_IGNORE_UNUSED,
+ AONCRG_CLK_OSC),
+ STARFIVE_GMUX(AONCRG_CLK_XSPI_XSPI_PHY, "aon_clk_xspi_xspi_phy", CLK_IGNORE_UNUSED, 2,
+ AONCRG_CLK_OSC, AONCRG_CLK_XSPI_PHY),
+ /* tvsensor */
+ STARFIVE_GATE(AONCRG_CLK_TVSENSOR_PCLK, "aon_clk_tvsensor_pclk", CLK_IGNORE_UNUSED,
+ AONCRG_CLK_OSC),
+ STARFIVE_GATE(AONCRG_CLK_TVSENSOR_TSADC, "aon_clk_tvsensor_tsadc", CLK_IGNORE_UNUSED,
+ AONCRG_CLK_OSC),
+ STARFIVE_GDIV(AONCRG_CLK_TVSENSOR_BG, "aon_clk_tvsensor_bg",
+ CLK_IGNORE_UNUSED, 3, AONCRG_CLK_OSC),
+ /* meu */
+ STARFIVE_GATE(AONCRG_CLK_MEU_PCLK_AP, "aon_clk_meu_pclk_ap", CLK_IGNORE_UNUSED,
+ AONCRG_CLK_OSC),
+ STARFIVE_GATE(AONCRG_CLK_MEU_PCLK_SCP, "aon_clk_meu_pclk_scp", CLK_IGNORE_UNUSED,
+ AONCRG_CLK_OSC),
+ STARFIVE_GATE(AONCRG_CLK_MEU_MEM_AXI, "aon_clk_meu_mem_axi", CLK_IGNORE_UNUSED,
+ AONCRG_CLK_AON_200),
+ /* aximem_128b */
+ STARFIVE_GATE(AONCRG_CLK_AXIMEM_128B_ACLK, "aon_clk_aximem_128b_aclk", CLK_IS_CRITICAL,
+ AONCRG_CLK_AON_200),
+ /* apb2bisr */
+ STARFIVE_GATE(AONCRG_CLK_APB2BISR_APB, "aon_clk_apb2bisr_apb", CLK_IGNORE_UNUSED,
+ AONCRG_CLK_OSC),
+ STARFIVE_GATE(AONCRG_CLK_APB2BISR_BISR, "aon_clk_apb2bisr_bisr", CLK_IGNORE_UNUSED,
+ AONCRG_CLK_OSC),
+ /* emmc */
+ STARFIVE_GATE(AONCRG_CLK_EMMC_S_PCLK, "aon_clk_emmc_s_pclk",
+ CLK_IGNORE_UNUSED, AONCRG_CLK_AON_50_POSTOSC),
+ STARFIVE_GATE(AONCRG_CLK_EMMC_MSTRCLK, "aon_clk_emmc_mstrclk",
+ CLK_IGNORE_UNUSED, AONCRG_CLK_AON_667),
+ STARFIVE_GATE(AONCRG_CLK_EMMC, "aon_clk_emmc",
+ CLK_IGNORE_UNUSED, AONCRG_CLK_AON_200),
+ STARFIVE_GATE(AONCRG_CLK_EMMC_SDMCLK, "aon_clk_emmc_sdmclk",
+ CLK_IGNORE_UNUSED, AONCRG_CLK_AON_200),
+ STARFIVE_GATE(AONCRG_CLK_EMMC_SDPHY_PCLK, "aon_clk_emmc_sdphy_pclk",
+ CLK_IGNORE_UNUSED, AONCRG_CLK_AON_50_POSTOSC),
+ /* sdio */
+ STARFIVE_GATE(AONCRG_CLK_SDIO0_PCLK, "aon_clk_sdio0_pclk",
+ CLK_IGNORE_UNUSED, AONCRG_CLK_AON_50_POSTOSC),
+ STARFIVE_GATE(AONCRG_CLK_SDIO0_MSTRCLK, "aon_clk_sdio0_mstrclk",
+ CLK_IGNORE_UNUSED, AONCRG_CLK_AON_667),
+ STARFIVE_GATE(AONCRG_CLK_SDIO0, "aon_clk_sdio0",
+ CLK_IGNORE_UNUSED, AONCRG_CLK_AON_200),
+ STARFIVE_GATE(AONCRG_CLK_SDIO0_SDMCLK, "aon_clk_sdio0_sdmclk",
+ CLK_IGNORE_UNUSED, AONCRG_CLK_AON_200),
+ STARFIVE_GATE(AONCRG_CLK_SDIO0_SDPHY_PCLK, "aon_clk_sdio0_sdphy_pclk",
+ CLK_IGNORE_UNUSED, AONCRG_CLK_AON_50_POSTOSC),
+ /* top */
+ STARFIVE_GATE(AONCRG_CLK_HCLK, "aon_clk_hclk", CLK_IS_CRITICAL,
+ AONCRG_CLK_AON_200),
+ STARFIVE_GATE(AONCRG_CLK_ACLK, "aon_clk_aclk", CLK_IS_CRITICAL,
+ AONCRG_CLK_AON_500_POSTOSC),
+ STARFIVE_GATE(AONCRG_CLK_PERF_MSTRCLK, "aon_clk_perf_mstrclk", CLK_IS_CRITICAL,
+ AONCRG_CLK_AON_667),
+ STARFIVE_GATE(AONCRG_CLK_PERF_SLVCLK, "aon_clk_perf_slvclk", CLK_IS_CRITICAL,
+ AONCRG_CLK_AON_500_POSTOSC),
+ STARFIVE_GDIV(AONCRG_CLK_GCLK0, "aon_clk_gclk0",
+ CLK_IS_CRITICAL, 100, AONCRG_CLK_AON_1000),
+ STARFIVE_GATE(AONCRG_CLK_GCLK_OSC, "aon_clk_gclk_osc", CLK_IS_CRITICAL,
+ AONCRG_CLK_OSC),
+ /* icg_en */
+ STARFIVE_GATE(AONCRG_CLK_RTC_ICG_EN, "aon_clk_rtc_en", CLK_IGNORE_UNUSED,
+ AONCRG_CLK_OSC),
+ STARFIVE_GATE(AONCRG_CLK_GMAC0_ICG_EN, "aon_clk_gmac0_en", 0,
+ AONCRG_CLK_GMAC0_GTXCLK),
+ STARFIVE_GATE(AONCRG_CLK_XSPI_ICG_EN, "aon_clk_xspi_en", 0,
+ AONCRG_CLK_OSC),
+ STARFIVE_GATE(AONCRG_CLK_TVSENSOR0_ICG_EN, "aon_clk_tvsensor0_en", 0,
+ AONCRG_CLK_OSC),
+ STARFIVE_GATE(AONCRG_CLK_MEU_ICG_EN, "aon_clk_meu_en", CLK_IGNORE_UNUSED,
+ AONCRG_CLK_OSC),
+ STARFIVE_GATE(AONCRG_CLK_APB2BISR_ICG_EN, "aon_clk_apb2bisr_en", CLK_IGNORE_UNUSED,
+ AONCRG_CLK_OSC),
+ STARFIVE_GATE(AONCRG_CLK_EMMC_ICG_EN, "aon_clk_emmc_en", 0,
+ AONCRG_CLK_AON_50_POSTOSC),
+ STARFIVE_GATE(AONCRG_CLK_SDIO0_ICG_EN, "aon_clk_sdio0_en", 0,
+ AONCRG_CLK_AON_50_POSTOSC),
+ STARFIVE_GATE(AONCRG_CLK_TOP_ICG_EN, "aon_clk_top_en", CLK_IGNORE_UNUSED,
+ AONCRG_CLK_AON_500_POSTOSC),
+};
+
+static struct clk_hw *jh8100_aoncrg_clk_get(struct of_phandle_args *clkspec, void *data)
+{
+ struct starfive_clk_priv *priv = data;
+ unsigned int idx = clkspec->args[0];
+
+ if (idx < AONCRG_CLK_END)
+ return &priv->reg[idx].hw;
+
+ return ERR_PTR(-EINVAL);
+}
+
+static int __init jh8100_aoncrg_probe(struct platform_device *pdev)
+{
+ struct starfive_clk_priv *priv;
+ unsigned int idx;
+ int ret;
+
+ priv = devm_kzalloc(&pdev->dev,
+ struct_size(priv, reg, AONCRG_CLK_END),
+ GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ spin_lock_init(&priv->rmw_lock);
+ priv->dev = &pdev->dev;
+ priv->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(priv->base))
+ return PTR_ERR(priv->base);
+
+ for (idx = 0; idx < AONCRG_CLK_END; idx++) {
+ u32 max = jh8100_aoncrg_clk_data[idx].max;
+ struct clk_parent_data parents[4] = {};
+ struct clk_init_data init = {
+ .name = jh8100_aoncrg_clk_data[idx].name,
+ .ops = starfive_clk_ops(max),
+ .parent_data = parents,
+ .num_parents =
+ ((max & STARFIVE_CLK_MUX_MASK) >> STARFIVE_CLK_MUX_SHIFT) + 1,
+ .flags = jh8100_aoncrg_clk_data[idx].flags,
+ };
+ struct starfive_clk *clk = &priv->reg[idx];
+ unsigned int i;
+
+ for (i = 0; i < init.num_parents; i++) {
+ unsigned int pidx = jh8100_aoncrg_clk_data[idx].parents[i];
+
+ if (pidx < AONCRG_CLK_END)
+ parents[i].hw = &priv->reg[pidx].hw;
+ else if (pidx == AONCRG_CLK_OSC)
+ parents[i].fw_name = "clk_osc";
+ else if (pidx == AONCRG_CLK_GMAC0_RMII_FUNC)
+ parents[i].fw_name = "clk_gmac0_rmii_func";
+ else if (pidx == AONCRG_CLK_AON_50)
+ parents[i].fw_name = "clk_aon50";
+ else if (pidx == AONCRG_CLK_GMAC0_RGMII_FUNC)
+ parents[i].fw_name = "clk_gmac0_rgmii_func";
+ else if (pidx == AONCRG_CLK_AON_125)
+ parents[i].fw_name = "clk_aon125";
+ else if (pidx == AONCRG_CLK_AON_2000)
+ parents[i].fw_name = "clk_aon2000";
+ else if (pidx == AONCRG_CLK_AON_200)
+ parents[i].fw_name = "clk_aon200";
+ else if (pidx == AONCRG_CLK_AON_667)
+ parents[i].fw_name = "clk_aon667";
+ else if (pidx == AONCRG_CLK_RTC)
+ parents[i].fw_name = "clk_rtc";
+ }
+
+ clk->hw.init = &init;
+ clk->idx = idx;
+ clk->max_div = max & STARFIVE_CLK_DIV_MASK;
+
+ ret = devm_clk_hw_register(&pdev->dev, &clk->hw);
+ if (ret)
+ return ret;
+ }
+
+ ret = devm_of_clk_add_hw_provider(&pdev->dev, jh8100_aoncrg_clk_get, priv);
+ if (ret)
+ return ret;
+
+ return jh8100_reset_controller_register(priv, "rst-aon", 4);
+}
+
+static const struct of_device_id jh8100_aoncrg_match[] = {
+ { .compatible = "starfive,jh8100-aoncrg" },
+ { /* sentinel */ }
+};
+
+static struct platform_driver jh8100_aoncrg_driver = {
+ .driver = {
+ .name = "clk-starfive-jh8100-aon",
+ .of_match_table = jh8100_aoncrg_match,
+ .suppress_bind_attrs = true,
+ },
+};
+builtin_platform_driver_probe(jh8100_aoncrg_driver, jh8100_aoncrg_probe);
--
2.34.1