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Sun, 28 Jan 2024 22:58:59 -0800 (PST) Received: from thinkpad ([117.193.214.109]) by smtp.gmail.com with ESMTPSA id h4-20020a0cd804000000b006869dae6edbsm3124426qvj.77.2024.01.28.22.58.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 28 Jan 2024 22:58:58 -0800 (PST) Date: Mon, 29 Jan 2024 12:28:46 +0530 From: Manivannan Sadhasivam To: Shradha Todi Cc: linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, mturquette@baylibre.com, sboyd@kernel.org, jingoohan1@gmail.com, lpieralisi@kernel.org, kw@linux.com, robh@kernel.org, bhelgaas@google.com, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, linux@armlinux.org.uk, m.szyprowski@samsung.com, pankaj.dubey@samsung.com Subject: Re: [PATCH v4 2/2] PCI: exynos: Adapt to clk_bulk_* APIs Message-ID: <20240129065846.GD2971@thinkpad> References: <20240124103838.32478-1-shradha.t@samsung.com> <20240124103838.32478-3-shradha.t@samsung.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20240124103838.32478-3-shradha.t@samsung.com> On Wed, Jan 24, 2024 at 04:08:38PM +0530, Shradha Todi wrote: > There is no need to hardcode the clock info in the driver as driver can > rely on the devicetree to supply the clocks required for the functioning > of the peripheral. Get rid of the static clock info and obtain the > platform supplied clocks. All the clocks supplied is obtained and enabled > using the devm_clk_bulk_get_all_enable() API. > > Signed-off-by: Shradha Todi Reviewed-by: Manivannan Sadhasivam - Mani > --- > drivers/pci/controller/dwc/pci-exynos.c | 54 ++----------------------- > 1 file changed, 4 insertions(+), 50 deletions(-) > > diff --git a/drivers/pci/controller/dwc/pci-exynos.c b/drivers/pci/controller/dwc/pci-exynos.c > index ec5611005566..3234eb5be1fb 100644 > --- a/drivers/pci/controller/dwc/pci-exynos.c > +++ b/drivers/pci/controller/dwc/pci-exynos.c > @@ -54,43 +54,11 @@ > struct exynos_pcie { > struct dw_pcie pci; > void __iomem *elbi_base; > - struct clk *clk; > - struct clk *bus_clk; > + struct clk_bulk_data *clks; > struct phy *phy; > struct regulator_bulk_data supplies[2]; > }; > > -static int exynos_pcie_init_clk_resources(struct exynos_pcie *ep) > -{ > - struct device *dev = ep->pci.dev; > - int ret; > - > - ret = clk_prepare_enable(ep->clk); > - if (ret) { > - dev_err(dev, "cannot enable pcie rc clock"); > - return ret; > - } > - > - ret = clk_prepare_enable(ep->bus_clk); > - if (ret) { > - dev_err(dev, "cannot enable pcie bus clock"); > - goto err_bus_clk; > - } > - > - return 0; > - > -err_bus_clk: > - clk_disable_unprepare(ep->clk); > - > - return ret; > -} > - > -static void exynos_pcie_deinit_clk_resources(struct exynos_pcie *ep) > -{ > - clk_disable_unprepare(ep->bus_clk); > - clk_disable_unprepare(ep->clk); > -} > - > static void exynos_pcie_writel(void __iomem *base, u32 val, u32 reg) > { > writel(val, base + reg); > @@ -332,17 +300,9 @@ static int exynos_pcie_probe(struct platform_device *pdev) > if (IS_ERR(ep->elbi_base)) > return PTR_ERR(ep->elbi_base); > > - ep->clk = devm_clk_get(dev, "pcie"); > - if (IS_ERR(ep->clk)) { > - dev_err(dev, "Failed to get pcie rc clock\n"); > - return PTR_ERR(ep->clk); > - } > - > - ep->bus_clk = devm_clk_get(dev, "pcie_bus"); > - if (IS_ERR(ep->bus_clk)) { > - dev_err(dev, "Failed to get pcie bus clock\n"); > - return PTR_ERR(ep->bus_clk); > - } > + ret = devm_clk_bulk_get_all_enable(dev, &ep->clks); > + if (ret < 0) > + return ret; > > ep->supplies[0].supply = "vdd18"; > ep->supplies[1].supply = "vdd10"; > @@ -351,10 +311,6 @@ static int exynos_pcie_probe(struct platform_device *pdev) > if (ret) > return ret; > > - ret = exynos_pcie_init_clk_resources(ep); > - if (ret) > - return ret; > - > ret = regulator_bulk_enable(ARRAY_SIZE(ep->supplies), ep->supplies); > if (ret) > return ret; > @@ -369,7 +325,6 @@ static int exynos_pcie_probe(struct platform_device *pdev) > > fail_probe: > phy_exit(ep->phy); > - exynos_pcie_deinit_clk_resources(ep); > regulator_bulk_disable(ARRAY_SIZE(ep->supplies), ep->supplies); > > return ret; > @@ -383,7 +338,6 @@ static int __exit exynos_pcie_remove(struct platform_device *pdev) > exynos_pcie_assert_core_reset(ep); > phy_power_off(ep->phy); > phy_exit(ep->phy); > - exynos_pcie_deinit_clk_resources(ep); > regulator_bulk_disable(ARRAY_SIZE(ep->supplies), ep->supplies); > > return 0; > -- > 2.17.1 > -- மணிவண்ணன் சதாசிவம்