From 050da2107a7eb2a571a8a3d0cee21cc6a44b72b8 Mon Sep 17 00:00:00 2001 From: John Crispin Date: Mon, 7 May 2018 12:07:32 +0200 Subject: mediatek: backport upstream mediatek patches Signed-off-by: John Crispin --- ...-mtu3-add-optional-mcu-and-dma-bus-clocks.patch | 233 +++++++++++++++++++++ 1 file changed, 233 insertions(+) create mode 100644 target/linux/mediatek/patches-4.14/0106-usb-mtu3-add-optional-mcu-and-dma-bus-clocks.patch (limited to 'target/linux/mediatek/patches-4.14/0106-usb-mtu3-add-optional-mcu-and-dma-bus-clocks.patch') diff --git a/target/linux/mediatek/patches-4.14/0106-usb-mtu3-add-optional-mcu-and-dma-bus-clocks.patch b/target/linux/mediatek/patches-4.14/0106-usb-mtu3-add-optional-mcu-and-dma-bus-clocks.patch new file mode 100644 index 0000000000..93a8c65294 --- /dev/null +++ b/target/linux/mediatek/patches-4.14/0106-usb-mtu3-add-optional-mcu-and-dma-bus-clocks.patch @@ -0,0 +1,233 @@ +From 677805f6d83524717b46b3cde74aa455dbf6299f Mon Sep 17 00:00:00 2001 +From: Chunfeng Yun +Date: Fri, 13 Oct 2017 17:10:40 +0800 +Subject: [PATCH 106/224] usb: mtu3: add optional mcu and dma bus clocks + +There are mcu_bus and dma_bus clocks needed to be turned on/off by +driver on some SoCs, so add them as optional ones + +Signed-off-by: Chunfeng Yun +Signed-off-by: Felipe Balbi +--- + drivers/usb/mtu3/mtu3.h | 5 ++ + drivers/usb/mtu3/mtu3_plat.c | 121 +++++++++++++++++++++++++++++-------------- + 2 files changed, 86 insertions(+), 40 deletions(-) + +diff --git a/drivers/usb/mtu3/mtu3.h b/drivers/usb/mtu3/mtu3.h +index 6d3278e46431..2795294ec92a 100644 +--- a/drivers/usb/mtu3/mtu3.h ++++ b/drivers/usb/mtu3/mtu3.h +@@ -206,6 +206,9 @@ struct otg_switch_mtk { + * @ippc_base: register base address of IP Power and Clock interface (IPPC) + * @vusb33: usb3.3V shared by device/host IP + * @sys_clk: system clock of mtu3, shared by device/host IP ++ * @ref_clk: reference clock ++ * @mcu_clk: mcu_bus_ck clock for AHB bus etc ++ * @dma_clk: dma_bus_ck clock for AXI bus etc + * @dr_mode: works in which mode: + * host only, device only or dual-role mode + * @u2_ports: number of usb2.0 host ports +@@ -226,6 +229,8 @@ struct ssusb_mtk { + struct regulator *vusb33; + struct clk *sys_clk; + struct clk *ref_clk; ++ struct clk *mcu_clk; ++ struct clk *dma_clk; + /* otg */ + struct otg_switch_mtk otg_switch; + enum usb_dr_mode dr_mode; +diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c +index 9edad30c8ae5..fb8992011bde 100644 +--- a/drivers/usb/mtu3/mtu3_plat.c ++++ b/drivers/usb/mtu3/mtu3_plat.c +@@ -110,15 +110,9 @@ static void ssusb_phy_power_off(struct ssusb_mtk *ssusb) + phy_power_off(ssusb->phys[i]); + } + +-static int ssusb_rscs_init(struct ssusb_mtk *ssusb) ++static int ssusb_clks_enable(struct ssusb_mtk *ssusb) + { +- int ret = 0; +- +- ret = regulator_enable(ssusb->vusb33); +- if (ret) { +- dev_err(ssusb->dev, "failed to enable vusb33\n"); +- goto vusb33_err; +- } ++ int ret; + + ret = clk_prepare_enable(ssusb->sys_clk); + if (ret) { +@@ -132,6 +126,52 @@ static int ssusb_rscs_init(struct ssusb_mtk *ssusb) + goto ref_clk_err; + } + ++ ret = clk_prepare_enable(ssusb->mcu_clk); ++ if (ret) { ++ dev_err(ssusb->dev, "failed to enable mcu_clk\n"); ++ goto mcu_clk_err; ++ } ++ ++ ret = clk_prepare_enable(ssusb->dma_clk); ++ if (ret) { ++ dev_err(ssusb->dev, "failed to enable dma_clk\n"); ++ goto dma_clk_err; ++ } ++ ++ return 0; ++ ++dma_clk_err: ++ clk_disable_unprepare(ssusb->mcu_clk); ++mcu_clk_err: ++ clk_disable_unprepare(ssusb->ref_clk); ++ref_clk_err: ++ clk_disable_unprepare(ssusb->sys_clk); ++sys_clk_err: ++ return ret; ++} ++ ++static void ssusb_clks_disable(struct ssusb_mtk *ssusb) ++{ ++ clk_disable_unprepare(ssusb->dma_clk); ++ clk_disable_unprepare(ssusb->mcu_clk); ++ clk_disable_unprepare(ssusb->ref_clk); ++ clk_disable_unprepare(ssusb->sys_clk); ++} ++ ++static int ssusb_rscs_init(struct ssusb_mtk *ssusb) ++{ ++ int ret = 0; ++ ++ ret = regulator_enable(ssusb->vusb33); ++ if (ret) { ++ dev_err(ssusb->dev, "failed to enable vusb33\n"); ++ goto vusb33_err; ++ } ++ ++ ret = ssusb_clks_enable(ssusb); ++ if (ret) ++ goto clks_err; ++ + ret = ssusb_phy_init(ssusb); + if (ret) { + dev_err(ssusb->dev, "failed to init phy\n"); +@@ -149,20 +189,16 @@ static int ssusb_rscs_init(struct ssusb_mtk *ssusb) + phy_err: + ssusb_phy_exit(ssusb); + phy_init_err: +- clk_disable_unprepare(ssusb->ref_clk); +-ref_clk_err: +- clk_disable_unprepare(ssusb->sys_clk); +-sys_clk_err: ++ ssusb_clks_disable(ssusb); ++clks_err: + regulator_disable(ssusb->vusb33); + vusb33_err: +- + return ret; + } + + static void ssusb_rscs_exit(struct ssusb_mtk *ssusb) + { +- clk_disable_unprepare(ssusb->sys_clk); +- clk_disable_unprepare(ssusb->ref_clk); ++ ssusb_clks_disable(ssusb); + regulator_disable(ssusb->vusb33); + ssusb_phy_power_off(ssusb); + ssusb_phy_exit(ssusb); +@@ -203,6 +239,19 @@ static int get_iddig_pinctrl(struct ssusb_mtk *ssusb) + return 0; + } + ++/* ignore the error if the clock does not exist */ ++static struct clk *get_optional_clk(struct device *dev, const char *id) ++{ ++ struct clk *opt_clk; ++ ++ opt_clk = devm_clk_get(dev, id); ++ /* ignore error number except EPROBE_DEFER */ ++ if (IS_ERR(opt_clk) && (PTR_ERR(opt_clk) != -EPROBE_DEFER)) ++ opt_clk = NULL; ++ ++ return opt_clk; ++} ++ + static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb) + { + struct device_node *node = pdev->dev.of_node; +@@ -225,18 +274,17 @@ static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb) + return PTR_ERR(ssusb->sys_clk); + } + +- /* +- * reference clock is usually a "fixed-clock", make it optional +- * for backward compatibility and ignore the error if it does +- * not exist. +- */ +- ssusb->ref_clk = devm_clk_get(dev, "ref_ck"); +- if (IS_ERR(ssusb->ref_clk)) { +- if (PTR_ERR(ssusb->ref_clk) == -EPROBE_DEFER) +- return -EPROBE_DEFER; ++ ssusb->ref_clk = get_optional_clk(dev, "ref_ck"); ++ if (IS_ERR(ssusb->ref_clk)) ++ return PTR_ERR(ssusb->ref_clk); + +- ssusb->ref_clk = NULL; +- } ++ ssusb->mcu_clk = get_optional_clk(dev, "mcu_ck"); ++ if (IS_ERR(ssusb->mcu_clk)) ++ return PTR_ERR(ssusb->mcu_clk); ++ ++ ssusb->dma_clk = get_optional_clk(dev, "dma_ck"); ++ if (IS_ERR(ssusb->dma_clk)) ++ return PTR_ERR(ssusb->dma_clk); + + ssusb->num_phys = of_count_phandle_with_args(node, + "phys", "#phy-cells"); +@@ -451,8 +499,7 @@ static int __maybe_unused mtu3_suspend(struct device *dev) + + ssusb_host_disable(ssusb, true); + ssusb_phy_power_off(ssusb); +- clk_disable_unprepare(ssusb->sys_clk); +- clk_disable_unprepare(ssusb->ref_clk); ++ ssusb_clks_disable(ssusb); + ssusb_wakeup_enable(ssusb); + + return 0; +@@ -470,27 +517,21 @@ static int __maybe_unused mtu3_resume(struct device *dev) + return 0; + + ssusb_wakeup_disable(ssusb); +- ret = clk_prepare_enable(ssusb->sys_clk); +- if (ret) +- goto err_sys_clk; +- +- ret = clk_prepare_enable(ssusb->ref_clk); ++ ret = ssusb_clks_enable(ssusb); + if (ret) +- goto err_ref_clk; ++ goto clks_err; + + ret = ssusb_phy_power_on(ssusb); + if (ret) +- goto err_power_on; ++ goto phy_err; + + ssusb_host_enable(ssusb); + + return 0; + +-err_power_on: +- clk_disable_unprepare(ssusb->ref_clk); +-err_ref_clk: +- clk_disable_unprepare(ssusb->sys_clk); +-err_sys_clk: ++phy_err: ++ ssusb_clks_disable(ssusb); ++clks_err: + return ret; + } + +-- +2.11.0 + -- cgit v1.2.3