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AJvYcCXlyRrkBCbG9V74EI5AzNMim5iD56tPXwkyqadmqnh9ahCaw+xkqCBGQZVrXPAs7oSri6kLvnATnqEN6Svuaq/ZvgIPBe31UoBnxJJeMbFIzab3Dz8Hye8+nZwTmwy+bnAc68Mp7wQt3Kae/IkJpmCSxMmwh6WYzk4= X-Gm-Message-State: AOJu0YwiZ+bZ1OpGM8+aOxZa+s4KRwHUtCFxjkZjMDvpwL8ICeq4isAs 4fV8k4VQtghkm/Qh6jHd9Qk2VnjrHwErXzvvzbIj/Gvv9wSB7ZMd X-Google-Smtp-Source: AGHT+IFILJk27iCIxuseIM+02eNcHoN2UkUZo85T5F0tcMNZh2iQMmEr9H9i+zOytBt+aLZnP6rG5g== X-Received: by 2002:a05:6a20:2a2f:b0:1b7:edea:e3f with SMTP id adf61e73a8af0-1bcbb421cfamr9446767637.12.1719037151750; Fri, 21 Jun 2024 23:19:11 -0700 (PDT) Received: from localhost.localdomain ([113.30.217.222]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2c7e53e7bf0sm4692240a91.19.2024.06.21.23.19.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 21 Jun 2024 23:19:11 -0700 (PDT) From: Anand Moon To: Shawn Lin , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84?= =?utf-8?q?ski?= , Rob Herring , Bjorn Helgaas , Heiko Stuebner , Philipp Zabel Cc: Anand Moon , linux-pci@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 2/3] PCI: rockchip: Simplify reset control handling by using reset_control_bulk*() function Date: Sat, 22 Jun 2024 11:48:39 +0530 Message-ID: <20240622061845.3678-2-linux.amoon@gmail.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240622061845.3678-1-linux.amoon@gmail.com> References: <20240622061845.3678-1-linux.amoon@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240621_231913_364356_CF414164 X-CRM114-Status: GOOD ( 19.12 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org Refactor the reset control handling in the Rockchip PCIe driver, introducing a more robust and efficient method for assert and deassert reset controller using reset_control_bulk*() API. Using the reset_control_bulk APIs, the reset handling for the core clocks reset unit becomes much simpler. As per rockchip rk3399 TRM SOFTRST_CON8 soft reset controller have clock reset unit value set to 0x1 for example "pcie_pipe", "pcie_mgmt_sticky", "pcie_mgmt" and "pci_core", hence group then under one reset bulk controller. Where as "pcie_pm", "presetn_pcie", "aresetn_pcie" have reset value set to 0x0, hence group them under reset control bulk controller. Signed-off-by: Anand Moon --- v3: Fix typo in commit message, dropped reported by. v2: Fix compilation error reported by Intel test robot fixed checkpatch warning --- drivers/pci/controller/pcie-rockchip.c | 141 +++++-------------------- drivers/pci/controller/pcie-rockchip.h | 25 +++-- 2 files changed, 47 insertions(+), 119 deletions(-) diff --git a/drivers/pci/controller/pcie-rockchip.c b/drivers/pci/controller/pcie-rockchip.c index 166dad666a35..f79e2b0a965b 100644 --- a/drivers/pci/controller/pcie-rockchip.c +++ b/drivers/pci/controller/pcie-rockchip.c @@ -69,54 +69,26 @@ int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip) if (rockchip->link_gen < 0 || rockchip->link_gen > 2) rockchip->link_gen = 2; - rockchip->core_rst = devm_reset_control_get_exclusive(dev, "core"); - if (IS_ERR(rockchip->core_rst)) { - if (PTR_ERR(rockchip->core_rst) != -EPROBE_DEFER) - dev_err(dev, "missing core reset property in node\n"); - return PTR_ERR(rockchip->core_rst); - } - - rockchip->mgmt_rst = devm_reset_control_get_exclusive(dev, "mgmt"); - if (IS_ERR(rockchip->mgmt_rst)) { - if (PTR_ERR(rockchip->mgmt_rst) != -EPROBE_DEFER) - dev_err(dev, "missing mgmt reset property in node\n"); - return PTR_ERR(rockchip->mgmt_rst); - } - - rockchip->mgmt_sticky_rst = devm_reset_control_get_exclusive(dev, - "mgmt-sticky"); - if (IS_ERR(rockchip->mgmt_sticky_rst)) { - if (PTR_ERR(rockchip->mgmt_sticky_rst) != -EPROBE_DEFER) - dev_err(dev, "missing mgmt-sticky reset property in node\n"); - return PTR_ERR(rockchip->mgmt_sticky_rst); - } - - rockchip->pipe_rst = devm_reset_control_get_exclusive(dev, "pipe"); - if (IS_ERR(rockchip->pipe_rst)) { - if (PTR_ERR(rockchip->pipe_rst) != -EPROBE_DEFER) - dev_err(dev, "missing pipe reset property in node\n"); - return PTR_ERR(rockchip->pipe_rst); - } + for (i = 0; i < ROCKCHIP_NUM_PM_RSTS; i++) + rockchip->pm_rsts[i].id = rockchip_pci_pm_rsts[i]; - rockchip->pm_rst = devm_reset_control_get_exclusive(dev, "pm"); - if (IS_ERR(rockchip->pm_rst)) { - if (PTR_ERR(rockchip->pm_rst) != -EPROBE_DEFER) - dev_err(dev, "missing pm reset property in node\n"); - return PTR_ERR(rockchip->pm_rst); + err = devm_reset_control_bulk_get_optional_exclusive(dev, + ROCKCHIP_NUM_PM_RSTS, + rockchip->pm_rsts); + if (err) { + dev_err(dev, "cannot get the devm_reset_control err %d\n", err); + return err; } - rockchip->pclk_rst = devm_reset_control_get_exclusive(dev, "pclk"); - if (IS_ERR(rockchip->pclk_rst)) { - if (PTR_ERR(rockchip->pclk_rst) != -EPROBE_DEFER) - dev_err(dev, "missing pclk reset property in node\n"); - return PTR_ERR(rockchip->pclk_rst); - } + for (i = 0; i < ROCKCHIP_NUM_CORE_RSTS; i++) + rockchip->core_rsts[i].id = rockchip_pci_core_rsts[i]; - rockchip->aclk_rst = devm_reset_control_get_exclusive(dev, "aclk"); - if (IS_ERR(rockchip->aclk_rst)) { - if (PTR_ERR(rockchip->aclk_rst) != -EPROBE_DEFER) - dev_err(dev, "missing aclk reset property in node\n"); - return PTR_ERR(rockchip->aclk_rst); + err = devm_reset_control_bulk_get_optional_exclusive(dev, + ROCKCHIP_NUM_CORE_RSTS, + rockchip->core_rsts); + if (err) { + dev_err(dev, "cannot get the devm_reset_control err %d\n", err); + return err; } if (rockchip->is_rc) { @@ -152,21 +124,10 @@ int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) int err, i; u32 regs; - err = reset_control_assert(rockchip->aclk_rst); + err = reset_control_bulk_assert(ROCKCHIP_NUM_PM_RSTS, + rockchip->pm_rsts); if (err) { - dev_err(dev, "assert aclk_rst err %d\n", err); - return err; - } - - err = reset_control_assert(rockchip->pclk_rst); - if (err) { - dev_err(dev, "assert pclk_rst err %d\n", err); - return err; - } - - err = reset_control_assert(rockchip->pm_rst); - if (err) { - dev_err(dev, "assert pm_rst err %d\n", err); + dev_err(dev, "reset bulk assert pm_rsts err %d\n", err); return err; } @@ -178,47 +139,19 @@ int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) } } - err = reset_control_assert(rockchip->core_rst); + err = reset_control_bulk_assert(ROCKCHIP_NUM_CORE_RSTS, + rockchip->core_rsts); if (err) { - dev_err(dev, "assert core_rst err %d\n", err); - goto err_exit_phy; - } - - err = reset_control_assert(rockchip->mgmt_rst); - if (err) { - dev_err(dev, "assert mgmt_rst err %d\n", err); - goto err_exit_phy; - } - - err = reset_control_assert(rockchip->mgmt_sticky_rst); - if (err) { - dev_err(dev, "assert mgmt_sticky_rst err %d\n", err); - goto err_exit_phy; - } - - err = reset_control_assert(rockchip->pipe_rst); - if (err) { - dev_err(dev, "assert pipe_rst err %d\n", err); + dev_err(dev, "reset bulk assert core_rsts err %d\n", err); goto err_exit_phy; } udelay(10); - err = reset_control_deassert(rockchip->pm_rst); - if (err) { - dev_err(dev, "deassert pm_rst err %d\n", err); - goto err_exit_phy; - } - - err = reset_control_deassert(rockchip->aclk_rst); - if (err) { - dev_err(dev, "deassert aclk_rst err %d\n", err); - goto err_exit_phy; - } - - err = reset_control_deassert(rockchip->pclk_rst); + err = reset_control_bulk_deassert(ROCKCHIP_NUM_PM_RSTS, + rockchip->pm_rsts); if (err) { - dev_err(dev, "deassert pclk_rst err %d\n", err); + dev_err(dev, "reset bulk deassert pm_rsts err %d\n", err); goto err_exit_phy; } @@ -261,31 +194,15 @@ int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) * Please don't reorder the deassert sequence of the following * four reset pins. */ - err = reset_control_deassert(rockchip->mgmt_sticky_rst); + err = reset_control_bulk_deassert(ROCKCHIP_NUM_CORE_RSTS, + rockchip->core_rsts); if (err) { - dev_err(dev, "deassert mgmt_sticky_rst err %d\n", err); - goto err_power_off_phy; - } - - err = reset_control_deassert(rockchip->core_rst); - if (err) { - dev_err(dev, "deassert core_rst err %d\n", err); - goto err_power_off_phy; - } - - err = reset_control_deassert(rockchip->mgmt_rst); - if (err) { - dev_err(dev, "deassert mgmt_rst err %d\n", err); - goto err_power_off_phy; - } - - err = reset_control_deassert(rockchip->pipe_rst); - if (err) { - dev_err(dev, "deassert pipe_rst err %d\n", err); + dev_err(dev, "reset bulk deassert core_rsts err %d\n", err); goto err_power_off_phy; } return 0; + err_power_off_phy: while (i--) phy_power_off(rockchip->phys[i]); diff --git a/drivers/pci/controller/pcie-rockchip.h b/drivers/pci/controller/pcie-rockchip.h index 72346e17e45e..27e951b41b80 100644 --- a/drivers/pci/controller/pcie-rockchip.h +++ b/drivers/pci/controller/pcie-rockchip.h @@ -15,6 +15,7 @@ #include #include #include +#include /* * The upper 16 bits of PCIE_CLIENT_CONFIG are a write mask for the lower 16 @@ -289,6 +290,8 @@ ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG_BAR_CTRL_MASK(b)) #define ROCKCHIP_NUM_CLKS ARRAY_SIZE(rockchip_pci_clks) +#define ROCKCHIP_NUM_PM_RSTS ARRAY_SIZE(rockchip_pci_pm_rsts) +#define ROCKCHIP_NUM_CORE_RSTS ARRAY_SIZE(rockchip_pci_core_rsts) static const char * const rockchip_pci_clks[] = { "aclk", @@ -297,18 +300,26 @@ static const char * const rockchip_pci_clks[] = { "pm", }; +static const char * const rockchip_pci_pm_rsts[] = { + "pm", + "pclk", + "aclk", +}; + +static const char * const rockchip_pci_core_rsts[] = { + "core", + "mgmt", + "mgmt-sticky", + "pipe", +}; + struct rockchip_pcie { void __iomem *reg_base; /* DT axi-base */ void __iomem *apb_base; /* DT apb-base */ bool legacy_phy; struct phy *phys[MAX_LANE_NUM]; - struct reset_control *core_rst; - struct reset_control *mgmt_rst; - struct reset_control *mgmt_sticky_rst; - struct reset_control *pipe_rst; - struct reset_control *pm_rst; - struct reset_control *aclk_rst; - struct reset_control *pclk_rst; + struct reset_control_bulk_data pm_rsts[ROCKCHIP_NUM_PM_RSTS]; + struct reset_control_bulk_data core_rsts[ROCKCHIP_NUM_CORE_RSTS]; struct clk_bulk_data clks[ROCKCHIP_NUM_CLKS]; struct regulator *vpcie12v; /* 12V power supply */ struct regulator *vpcie3v3; /* 3.3V power supply */