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author | Emil Renner Berthing <kernel@esmil.dk> | 2023-04-01 19:19:26 +0800 |
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committer | Conor Dooley <conor.dooley@microchip.com> | 2023-04-05 15:44:18 +0100 |
commit | b2ab3c94f41f888f9bec6ac6bf75935e2e2e253a (patch) | |
tree | 0dcb72933d2377a997b2c4eb7cfe90c5d9234c56 | |
parent | edab7204afe55bdf2d17d3490eb88497ba60f628 (diff) | |
download | linux-stable-b2ab3c94f41f888f9bec6ac6bf75935e2e2e253a.tar.gz linux-stable-b2ab3c94f41f888f9bec6ac6bf75935e2e2e253a.tar.bz2 linux-stable-b2ab3c94f41f888f9bec6ac6bf75935e2e2e253a.zip |
clk: starfive: Add StarFive JH7110 always-on clock driver
Add driver for the StarFive JH7110 always-on clock controller
and register an auxiliary device for always-on reset controller
which is named as "rst-aon".
Tested-by: Tommaso Merciai <tomm.merciai@gmail.com>
Reviewed-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
Co-developed-by: Hal Feng <hal.feng@starfivetech.com>
Signed-off-by: Hal Feng <hal.feng@starfivetech.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
-rw-r--r-- | drivers/clk/starfive/Kconfig | 11 | ||||
-rw-r--r-- | drivers/clk/starfive/Makefile | 1 | ||||
-rw-r--r-- | drivers/clk/starfive/clk-starfive-jh7110-aon.c | 156 |
3 files changed, 168 insertions, 0 deletions
diff --git a/drivers/clk/starfive/Kconfig b/drivers/clk/starfive/Kconfig index 670c5084aeb8..71c1148ee5f6 100644 --- a/drivers/clk/starfive/Kconfig +++ b/drivers/clk/starfive/Kconfig @@ -31,3 +31,14 @@ config CLK_STARFIVE_JH7110_SYS help Say yes here to support the system clock controller on the StarFive JH7110 SoC. + +config CLK_STARFIVE_JH7110_AON + tristate "StarFive JH7110 always-on clock support" + depends on CLK_STARFIVE_JH7110_SYS + select AUXILIARY_BUS + select CLK_STARFIVE_JH71X0 + select RESET_STARFIVE_JH7110 + default m if ARCH_STARFIVE + help + Say yes here to support the always-on clock controller on the + StarFive JH7110 SoC. diff --git a/drivers/clk/starfive/Makefile b/drivers/clk/starfive/Makefile index 5ca4e887fb9c..f3df7d957b1e 100644 --- a/drivers/clk/starfive/Makefile +++ b/drivers/clk/starfive/Makefile @@ -5,3 +5,4 @@ obj-$(CONFIG_CLK_STARFIVE_JH7100) += clk-starfive-jh7100.o obj-$(CONFIG_CLK_STARFIVE_JH7100_AUDIO) += clk-starfive-jh7100-audio.o obj-$(CONFIG_CLK_STARFIVE_JH7110_SYS) += clk-starfive-jh7110-sys.o +obj-$(CONFIG_CLK_STARFIVE_JH7110_AON) += clk-starfive-jh7110-aon.o diff --git a/drivers/clk/starfive/clk-starfive-jh7110-aon.c b/drivers/clk/starfive/clk-starfive-jh7110-aon.c new file mode 100644 index 000000000000..a2799fe8a234 --- /dev/null +++ b/drivers/clk/starfive/clk-starfive-jh7110-aon.c @@ -0,0 +1,156 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * StarFive JH7110 Always-On Clock Driver + * + * Copyright (C) 2022 Emil Renner Berthing <kernel@esmil.dk> + * Copyright (C) 2022 StarFive Technology Co., Ltd. + */ + +#include <linux/clk-provider.h> +#include <linux/io.h> +#include <linux/platform_device.h> + +#include <dt-bindings/clock/starfive,jh7110-crg.h> + +#include "clk-starfive-jh7110.h" + +/* external clocks */ +#define JH7110_AONCLK_OSC (JH7110_AONCLK_END + 0) +#define JH7110_AONCLK_GMAC0_RMII_REFIN (JH7110_AONCLK_END + 1) +#define JH7110_AONCLK_GMAC0_RGMII_RXIN (JH7110_AONCLK_END + 2) +#define JH7110_AONCLK_STG_AXIAHB (JH7110_AONCLK_END + 3) +#define JH7110_AONCLK_APB_BUS (JH7110_AONCLK_END + 4) +#define JH7110_AONCLK_GMAC0_GTXCLK (JH7110_AONCLK_END + 5) +#define JH7110_AONCLK_RTC_OSC (JH7110_AONCLK_END + 6) + +static const struct jh71x0_clk_data jh7110_aonclk_data[] = { + /* source */ + JH71X0__DIV(JH7110_AONCLK_OSC_DIV4, "osc_div4", 4, JH7110_AONCLK_OSC), + JH71X0__MUX(JH7110_AONCLK_APB_FUNC, "apb_func", 2, + JH7110_AONCLK_OSC_DIV4, + JH7110_AONCLK_OSC), + /* gmac0 */ + JH71X0_GATE(JH7110_AONCLK_GMAC0_AHB, "gmac0_ahb", 0, JH7110_AONCLK_STG_AXIAHB), + JH71X0_GATE(JH7110_AONCLK_GMAC0_AXI, "gmac0_axi", 0, JH7110_AONCLK_STG_AXIAHB), + JH71X0__DIV(JH7110_AONCLK_GMAC0_RMII_RTX, "gmac0_rmii_rtx", 30, + JH7110_AONCLK_GMAC0_RMII_REFIN), + JH71X0_GMUX(JH7110_AONCLK_GMAC0_TX, "gmac0_tx", + CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT, 2, + JH7110_AONCLK_GMAC0_GTXCLK, + JH7110_AONCLK_GMAC0_RMII_RTX), + JH71X0__INV(JH7110_AONCLK_GMAC0_TX_INV, "gmac0_tx_inv", JH7110_AONCLK_GMAC0_TX), + JH71X0__MUX(JH7110_AONCLK_GMAC0_RX, "gmac0_rx", 2, + JH7110_AONCLK_GMAC0_RGMII_RXIN, + JH7110_AONCLK_GMAC0_RMII_RTX), + JH71X0__INV(JH7110_AONCLK_GMAC0_RX_INV, "gmac0_rx_inv", JH7110_AONCLK_GMAC0_RX), + /* otpc */ + JH71X0_GATE(JH7110_AONCLK_OTPC_APB, "otpc_apb", 0, JH7110_AONCLK_APB_BUS), + /* rtc */ + JH71X0_GATE(JH7110_AONCLK_RTC_APB, "rtc_apb", 0, JH7110_AONCLK_APB_BUS), + JH71X0__DIV(JH7110_AONCLK_RTC_INTERNAL, "rtc_internal", 1022, JH7110_AONCLK_OSC), + JH71X0__MUX(JH7110_AONCLK_RTC_32K, "rtc_32k", 2, + JH7110_AONCLK_RTC_OSC, + JH7110_AONCLK_RTC_INTERNAL), + JH71X0_GATE(JH7110_AONCLK_RTC_CAL, "rtc_cal", 0, JH7110_AONCLK_OSC), +}; + +static struct clk_hw *jh7110_aonclk_get(struct of_phandle_args *clkspec, void *data) +{ + struct jh71x0_clk_priv *priv = data; + unsigned int idx = clkspec->args[0]; + + if (idx < JH7110_AONCLK_END) + return &priv->reg[idx].hw; + + return ERR_PTR(-EINVAL); +} + +static int jh7110_aoncrg_probe(struct platform_device *pdev) +{ + struct jh71x0_clk_priv *priv; + unsigned int idx; + int ret; + + priv = devm_kzalloc(&pdev->dev, + struct_size(priv, reg, JH7110_AONCLK_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); + + dev_set_drvdata(priv->dev, (void *)(&priv->base)); + + for (idx = 0; idx < JH7110_AONCLK_END; idx++) { + u32 max = jh7110_aonclk_data[idx].max; + struct clk_parent_data parents[4] = {}; + struct clk_init_data init = { + .name = jh7110_aonclk_data[idx].name, + .ops = starfive_jh71x0_clk_ops(max), + .parent_data = parents, + .num_parents = + ((max & JH71X0_CLK_MUX_MASK) >> JH71X0_CLK_MUX_SHIFT) + 1, + .flags = jh7110_aonclk_data[idx].flags, + }; + struct jh71x0_clk *clk = &priv->reg[idx]; + unsigned int i; + + for (i = 0; i < init.num_parents; i++) { + unsigned int pidx = jh7110_aonclk_data[idx].parents[i]; + + if (pidx < JH7110_AONCLK_END) + parents[i].hw = &priv->reg[pidx].hw; + else if (pidx == JH7110_AONCLK_OSC) + parents[i].fw_name = "osc"; + else if (pidx == JH7110_AONCLK_GMAC0_RMII_REFIN) + parents[i].fw_name = "gmac0_rmii_refin"; + else if (pidx == JH7110_AONCLK_GMAC0_RGMII_RXIN) + parents[i].fw_name = "gmac0_rgmii_rxin"; + else if (pidx == JH7110_AONCLK_STG_AXIAHB) + parents[i].fw_name = "stg_axiahb"; + else if (pidx == JH7110_AONCLK_APB_BUS) + parents[i].fw_name = "apb_bus"; + else if (pidx == JH7110_AONCLK_GMAC0_GTXCLK) + parents[i].fw_name = "gmac0_gtxclk"; + else if (pidx == JH7110_AONCLK_RTC_OSC) + parents[i].fw_name = "rtc_osc"; + } + + clk->hw.init = &init; + clk->idx = idx; + clk->max_div = max & JH71X0_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, jh7110_aonclk_get, priv); + if (ret) + return ret; + + return jh7110_reset_controller_register(priv, "rst-aon", 1); +} + +static const struct of_device_id jh7110_aoncrg_match[] = { + { .compatible = "starfive,jh7110-aoncrg" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, jh7110_aoncrg_match); + +static struct platform_driver jh7110_aoncrg_driver = { + .probe = jh7110_aoncrg_probe, + .driver = { + .name = "clk-starfive-jh7110-aon", + .of_match_table = jh7110_aoncrg_match, + }, +}; +module_platform_driver(jh7110_aoncrg_driver); + +MODULE_AUTHOR("Emil Renner Berthing"); +MODULE_DESCRIPTION("StarFive JH7110 always-on clock driver"); +MODULE_LICENSE("GPL"); |