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[73.183.53.213]) by smtp.gmail.com with ESMTPSA id 00721157ae682-81fb88c4a92sm13487757b3.7.2026.07.30.09.55.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 30 Jul 2026 09:56:01 -0700 (PDT) Date: Thu, 30 Jul 2026 12:55:58 -0400 From: Brian Masney To: Yu-Chun Lin Cc: mturquette@baylibre.com, sboyd@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, p.zabel@pengutronix.de, cylee12@realtek.com, jyanchou@realtek.com, afaerber@suse.com, devicetree@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-realtek-soc@lists.infradead.org, james.tai@realtek.com, cy.huang@realtek.com, stanley_chang@realtek.com Subject: Re: [PATCH v11 10/11] clk: realtek: Add RTD1625-ISO clock controller driver Message-ID: References: <20260728142806.1954638-1-eleanor.lin@realtek.com> <20260728142806.1954638-11-eleanor.lin@realtek.com> Precedence: bulk X-Mailing-List: linux-clk@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260728142806.1954638-11-eleanor.lin@realtek.com> User-Agent: Mutt/2.4.0 (2026-06-19) Hi Yu-Chun, On Tue, Jul 28, 2026 at 10:28:05PM +0800, Yu-Chun Lin wrote: > From: Cheng-Yu Lee > > Add support for the ISO (Isolation) domain clock controller on the Realtek > RTD1625 SoC. This controller manages clocks in the always-on power domain, > ensuring essential services remain functional even when the main system > power is gated. > > Because the reset controller shares the same register space with this ISO > clock controller, this driver also acts as the parent device and registers > the reset controller as an auxiliary device on the auxiliary bus. > > Signed-off-by: Cheng-Yu Lee > Co-developed-by: Yu-Chun Lin > Signed-off-by: Yu-Chun Lin > --- > Changes in v11: > - Drop the unused two MACRO. > - Add 'rtk_' prefix into struct names and function names. > --- > drivers/clk/realtek/Makefile | 1 + > drivers/clk/realtek/clk-rtd1625-iso.c | 145 ++++++++++++++++++++++++++ > 2 files changed, 146 insertions(+) > create mode 100644 drivers/clk/realtek/clk-rtd1625-iso.c > > diff --git a/drivers/clk/realtek/Makefile b/drivers/clk/realtek/Makefile > index 15b9eec74e36..fbf8cb0db2f0 100644 > --- a/drivers/clk/realtek/Makefile > +++ b/drivers/clk/realtek/Makefile > @@ -9,3 +9,4 @@ clk-rtk-y += clk-regmap-mux.o > > clk-rtk-$(CONFIG_RTK_CLK_PLL_MMC) += clk-pll-mmc.o > obj-$(CONFIG_CLK_RTD1625) += clk-rtd1625-crt.o > +obj-$(CONFIG_CLK_RTD1625) += clk-rtd1625-iso.o > diff --git a/drivers/clk/realtek/clk-rtd1625-iso.c b/drivers/clk/realtek/clk-rtd1625-iso.c > new file mode 100644 > index 000000000000..cd328d3961c5 > --- /dev/null > +++ b/drivers/clk/realtek/clk-rtd1625-iso.c > @@ -0,0 +1,145 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Copyright (C) 2024-2026 Realtek Semiconductor Corporation > + * Author: Cheng-Yu Lee > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include "clk-regmap-gate.h" > + > +#define RTD1625_ISO_CLK_MAX 19 > +#define RTD1625_ISO_S_CLK_MAX 5 > + > +static RTK_CLK_REGMAP_GATE_NO_PARENT(clk_en_usb_p4, 0, 0x4, 0, 0); > +static RTK_CLK_REGMAP_GATE_NO_PARENT(clk_en_usb_p3, 0, 0x4, 1, 0); > +static RTK_CLK_REGMAP_GATE(clk_en_misc_cec0, "clk_en_misc", 0, 0x4, 2, 0); > +static RTK_CLK_REGMAP_GATE_NO_PARENT(clk_en_cbusrx_sys, 0, 0x4, 3, 0); > +static RTK_CLK_REGMAP_GATE_NO_PARENT(clk_en_cbustx_sys, 0, 0x4, 4, 0); > +static RTK_CLK_REGMAP_GATE_NO_PARENT(clk_en_cbus_sys, 0, 0x4, 5, 0); > +static RTK_CLK_REGMAP_GATE_NO_PARENT(clk_en_cbus_osc, 0, 0x4, 6, 0); > +static RTK_CLK_REGMAP_GATE_NO_PARENT(clk_en_i2c0, 0, 0x4, 9, 0); > +static RTK_CLK_REGMAP_GATE_NO_PARENT(clk_en_i2c1, 0, 0x4, 10, 0); > +static RTK_CLK_REGMAP_GATE_NO_PARENT(clk_en_etn_250m, 0, 0x4, 11, 0); > +static RTK_CLK_REGMAP_GATE_NO_PARENT(clk_en_etn_sys, 0, 0x4, 12, 0); > +static RTK_CLK_REGMAP_GATE_NO_PARENT(clk_en_usb_drd, 0, 0x4, 13, 0); > +static RTK_CLK_REGMAP_GATE_NO_PARENT(clk_en_usb_host, 0, 0x4, 14, 0); > +static RTK_CLK_REGMAP_GATE_NO_PARENT(clk_en_usb_u3_host, 0, 0x4, 15, 0); > +static RTK_CLK_REGMAP_GATE_NO_PARENT(clk_en_usb, 0, 0x4, 16, 0); > +static RTK_CLK_REGMAP_GATE_NO_PARENT(clk_en_vtc, 0, 0x4, 17, 0); > +static RTK_CLK_REGMAP_GATE(clk_en_misc_vfd, "clk_en_misc", 0, 0x4, 18, 0); > + > +static struct rtk_clk_regmap * const rtd1625_clk_regmap_list[] = { > + &clk_en_usb_p4.clkr, > + &clk_en_usb_p3.clkr, > + &clk_en_misc_cec0.clkr, > + &clk_en_cbusrx_sys.clkr, > + &clk_en_cbustx_sys.clkr, > + &clk_en_cbus_sys.clkr, > + &clk_en_cbus_osc.clkr, > + &clk_en_i2c0.clkr, > + &clk_en_i2c1.clkr, > + &clk_en_etn_250m.clkr, > + &clk_en_etn_sys.clkr, > + &clk_en_usb_drd.clkr, > + &clk_en_usb_host.clkr, > + &clk_en_usb_u3_host.clkr, > + &clk_en_usb.clkr, > + &clk_en_vtc.clkr, > + &clk_en_misc_vfd.clkr, > +}; > + > +static struct clk_hw_onecell_data rtd1625_iso_clk_data = { > + .num = RTD1625_ISO_CLK_MAX, > + .hws = { > + [RTD1625_ISO_CLK_EN_USB_P4] = &__rtk_clk_regmap_gate_hw(&clk_en_usb_p4), > + [RTD1625_ISO_CLK_EN_USB_P3] = &__rtk_clk_regmap_gate_hw(&clk_en_usb_p3), > + [RTD1625_ISO_CLK_EN_MISC_CEC0] = &__rtk_clk_regmap_gate_hw(&clk_en_misc_cec0), > + [RTD1625_ISO_CLK_EN_CBUSRX_SYS] = &__rtk_clk_regmap_gate_hw(&clk_en_cbusrx_sys), > + [RTD1625_ISO_CLK_EN_CBUSTX_SYS] = &__rtk_clk_regmap_gate_hw(&clk_en_cbustx_sys), > + [RTD1625_ISO_CLK_EN_CBUS_SYS] = &__rtk_clk_regmap_gate_hw(&clk_en_cbus_sys), > + [RTD1625_ISO_CLK_EN_CBUS_OSC] = &__rtk_clk_regmap_gate_hw(&clk_en_cbus_osc), > + [RTD1625_ISO_CLK_EN_I2C0] = &__rtk_clk_regmap_gate_hw(&clk_en_i2c0), > + [RTD1625_ISO_CLK_EN_I2C1] = &__rtk_clk_regmap_gate_hw(&clk_en_i2c1), > + [RTD1625_ISO_CLK_EN_ETN_250M] = &__rtk_clk_regmap_gate_hw(&clk_en_etn_250m), > + [RTD1625_ISO_CLK_EN_ETN_SYS] = &__rtk_clk_regmap_gate_hw(&clk_en_etn_sys), > + [RTD1625_ISO_CLK_EN_USB_DRD] = &__rtk_clk_regmap_gate_hw(&clk_en_usb_drd), > + [RTD1625_ISO_CLK_EN_USB_HOST] = &__rtk_clk_regmap_gate_hw(&clk_en_usb_host), > + [RTD1625_ISO_CLK_EN_USB_U3_HOST] = &__rtk_clk_regmap_gate_hw(&clk_en_usb_u3_host), > + [RTD1625_ISO_CLK_EN_USB] = &__rtk_clk_regmap_gate_hw(&clk_en_usb), > + [RTD1625_ISO_CLK_EN_VTC] = &__rtk_clk_regmap_gate_hw(&clk_en_vtc), > + [RTD1625_ISO_CLK_EN_MISC_VFD] = &__rtk_clk_regmap_gate_hw(&clk_en_misc_vfd), > + }, > +}; > + > +static const struct rtk_clk_desc rtd1625_iso_desc = { > + .clk_data = &rtd1625_iso_clk_data, > + .clks = rtd1625_clk_regmap_list, > + .num_clks = ARRAY_SIZE(rtd1625_clk_regmap_list), > + .aux_name = "rtd1625_iso_rst", > +}; > + > +static RTK_CLK_REGMAP_GATE_NO_PARENT(clk_en_irda, 0, 0x4, 6, 1); > +static RTK_CLK_REGMAP_GATE_NO_PARENT(clk_en_ur10, 0, 0x4, 8, 1); > + > +static struct rtk_clk_regmap * const rtd1625_iso_s_clk_regmap_list[] = { > + &clk_en_irda.clkr, > + &clk_en_ur10.clkr, > +}; > + > +static struct clk_hw_onecell_data rtd1625_iso_s_clk_data = { > + .num = RTD1625_ISO_S_CLK_MAX, > + .hws = { > + [RTD1625_ISO_S_CLK_EN_IRDA] = &__rtk_clk_regmap_gate_hw(&clk_en_irda), > + [RTD1625_ISO_S_CLK_EN_UR10] = &__rtk_clk_regmap_gate_hw(&clk_en_ur10), > + }, > +}; > + > +static const struct rtk_clk_desc rtd1625_iso_s_desc = { > + .clk_data = &rtd1625_iso_s_clk_data, > + .clks = rtd1625_iso_s_clk_regmap_list, > + .num_clks = ARRAY_SIZE(rtd1625_iso_s_clk_regmap_list), > + .aux_name = "rtd1625_iso_s_rst", > +}; > + > +static int rtd1625_iso_probe(struct platform_device *pdev) > +{ > + const struct rtk_clk_desc *desc; > + > + desc = of_device_get_match_data(&pdev->dev); Same comment as previous patch. This function is deprecated. > + if (!desc) > + return -EINVAL; > + > + return rtk_clk_probe(pdev, desc); > +} > + > +static const struct of_device_id rtd1625_iso_match[] = { > + {.compatible = "realtek,rtd1625-iso-clk", .data = &rtd1625_iso_desc}, > + {.compatible = "realtek,rtd1625-iso-s-clk", .data = &rtd1625_iso_s_desc}, Add space after the { and before the closing } > + { /* sentinel */ } > +}; > +MODULE_DEVICE_TABLE(of, rtd1625_iso_match); > + > +static struct platform_driver rtd1625_iso_driver = { > + .probe = rtd1625_iso_probe, > + .driver = { > + .name = "rtk-rtd1625-iso-clk", > + .of_match_table = rtd1625_iso_match, > + .suppress_bind_attrs = true, > + }, > +}; > + > +static int __init rtd1625_iso_init(void) > +{ > + return platform_driver_register(&rtd1625_iso_driver); > +} > +subsys_initcall(rtd1625_iso_init); Same comment as previous patch about whether or not this can use module_platform_driver()? > + > +MODULE_DESCRIPTION("Realtek RTD1625 ISO Clock Controller Driver"); > +MODULE_AUTHOR("Cheng-Yu Lee "); > +MODULE_LICENSE("GPL"); > +MODULE_IMPORT_NS("REALTEK_CLK"); CLK_REALTEK Brian > -- > 2.43.0 >