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([82.78.167.83]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ae3f66d9215sm194703766b.2.2025.07.04.09.14.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Jul 2025 09:14:38 -0700 (PDT) From: Claudiu X-Google-Original-From: Claudiu To: bhelgaas@google.com, lpieralisi@kernel.org, kwilczynski@kernel.org, mani@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, geert+renesas@glider.be, magnus.damm@gmail.com, catalin.marinas@arm.com, will@kernel.org, mturquette@baylibre.com, sboyd@kernel.org, p.zabel@pengutronix.de, lizhi.hou@amd.com Cc: claudiu.beznea@tuxon.dev, linux-pci@vger.kernel.org, linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org, Claudiu Beznea , Wolfram Sang Subject: [PATCH v3 2/9] clk: renesas: r9a08g045: Add clocks and resets support for PCIe Date: Fri, 4 Jul 2025 19:14:02 +0300 Message-ID: <20250704161410.3931884-3-claudiu.beznea.uj@bp.renesas.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250704161410.3931884-1-claudiu.beznea.uj@bp.renesas.com> References: <20250704161410.3931884-1-claudiu.beznea.uj@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Claudiu Beznea Add clocks and resets for the PCIe IP available on the Renesas RZ/G3S SoC. The clkl1pm clock is required for PCIe link power management (PM) control and should be enabled based on the state of the CLKREQ# pin. Therefore, mark it as a no_pm clock to allow the PCIe driver to manage it during link PM transitions. Tested-by: Wolfram Sang Signed-off-by: Claudiu Beznea --- Changes in v3: - collected tags - dropped the power domain support and added MSTOP as power domain code is not available anymore in the current linux-next - adjusted the patch title and description Changes in v2: - none drivers/clk/renesas/r9a08g045-cpg.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/clk/renesas/r9a08g045-cpg.c b/drivers/clk/renesas/r9a08g045-cpg.c index 405907925bb7..4a6632ea22cb 100644 --- a/drivers/clk/renesas/r9a08g045-cpg.c +++ b/drivers/clk/renesas/r9a08g045-cpg.c @@ -289,6 +289,10 @@ static const struct rzg2l_mod_clk r9a08g045_mod_clks[] = { MSTOP(BUS_MCPU2, BIT(14))), DEF_MOD("tsu_pclk", R9A08G045_TSU_PCLK, R9A08G045_CLK_TSU, 0x5ac, 0, MSTOP(BUS_MCPU2, BIT(15))), + DEF_MOD("pci_aclk", R9A08G045_PCI_ACLK, R9A08G045_CLK_M0, 0x608, 0, + MSTOP(BUS_PERI_COM, BIT(10))), + DEF_MOD("pci_clk1pm", R9A08G045_PCI_CLKL1PM, R9A08G045_CLK_ZT, 0x608, 1, + MSTOP(BUS_PERI_COM, BIT(10))), DEF_MOD("vbat_bclk", R9A08G045_VBAT_BCLK, R9A08G045_OSCCLK, 0x614, 0, MSTOP(BUS_MCPU3, GENMASK(8, 7))), }; @@ -329,6 +333,13 @@ static const struct rzg2l_reset r9a08g045_resets[] = { DEF_RST(R9A08G045_ADC_PRESETN, 0x8a8, 0), DEF_RST(R9A08G045_ADC_ADRST_N, 0x8a8, 1), DEF_RST(R9A08G045_TSU_PRESETN, 0x8ac, 0), + DEF_RST(R9A08G045_PCI_ARESETN, 0x908, 0), + DEF_RST(R9A08G045_PCI_RST_B, 0x908, 1), + DEF_RST(R9A08G045_PCI_RST_GP_B, 0x908, 2), + DEF_RST(R9A08G045_PCI_RST_PS_B, 0x908, 3), + DEF_RST(R9A08G045_PCI_RST_RSM_B, 0x908, 4), + DEF_RST(R9A08G045_PCI_RST_CFG_B, 0x908, 5), + DEF_RST(R9A08G045_PCI_RST_LOAD_B, 0x908, 6), DEF_RST(R9A08G045_VBAT_BRESETN, 0x914, 0), }; @@ -340,6 +351,10 @@ static const unsigned int r9a08g045_crit_mod_clks[] __initconst = { MOD_CLK_BASE + R9A08G045_VBAT_BCLK, }; +static const unsigned int r9a08g045_no_pm_mod_clks[] = { + MOD_CLK_BASE + R9A08G045_PCI_CLKL1PM, +}; + const struct rzg2l_cpg_info r9a08g045_cpg_info = { /* Core Clocks */ .core_clks = r9a08g045_core_clks, @@ -356,6 +371,10 @@ const struct rzg2l_cpg_info r9a08g045_cpg_info = { .num_mod_clks = ARRAY_SIZE(r9a08g045_mod_clks), .num_hw_mod_clks = R9A08G045_VBAT_BCLK + 1, + /* No PM modules Clocks */ + .no_pm_mod_clks = r9a08g045_no_pm_mod_clks, + .num_no_pm_mod_clks = ARRAY_SIZE(r9a08g045_no_pm_mod_clks), + /* Resets */ .resets = r9a08g045_resets, .num_resets = R9A08G045_VBAT_BRESETN + 1, /* Last reset ID + 1 */ -- 2.43.0