| /* |
| * phy-ti-pipe3 - PIPE3 PHY driver. |
| * |
| * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * Author: Kishon Vijay Abraham I <kishon@ti.com> |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/slab.h> |
| #include <linux/phy/phy.h> |
| #include <linux/of.h> |
| #include <linux/clk.h> |
| #include <linux/err.h> |
| #include <linux/io.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/delay.h> |
| #include <linux/phy/omap_control_phy.h> |
| #include <linux/of_platform.h> |
| #include <linux/mfd/syscon.h> |
| #include <linux/regmap.h> |
| |
| #define PLL_STATUS 0x00000004 |
| #define PLL_GO 0x00000008 |
| #define PLL_CONFIGURATION1 0x0000000C |
| #define PLL_CONFIGURATION2 0x00000010 |
| #define PLL_CONFIGURATION3 0x00000014 |
| #define PLL_CONFIGURATION4 0x00000020 |
| |
| #define PLL_REGM_MASK 0x001FFE00 |
| #define PLL_REGM_SHIFT 0x9 |
| #define PLL_REGM_F_MASK 0x0003FFFF |
| #define PLL_REGM_F_SHIFT 0x0 |
| #define PLL_REGN_MASK 0x000001FE |
| #define PLL_REGN_SHIFT 0x1 |
| #define PLL_SELFREQDCO_MASK 0x0000000E |
| #define PLL_SELFREQDCO_SHIFT 0x1 |
| #define PLL_SD_MASK 0x0003FC00 |
| #define PLL_SD_SHIFT 10 |
| #define SET_PLL_GO 0x1 |
| #define PLL_LDOPWDN BIT(15) |
| #define PLL_TICOPWDN BIT(16) |
| #define PLL_LOCK 0x2 |
| #define PLL_IDLE 0x1 |
| |
| #define SATA_PLL_SOFT_RESET BIT(18) |
| |
| #define PIPE3_PHY_PWRCTL_CLK_CMD_MASK 0x003FC000 |
| #define PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT 14 |
| |
| #define PIPE3_PHY_PWRCTL_CLK_FREQ_MASK 0xFFC00000 |
| #define PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT 22 |
| |
| #define PIPE3_PHY_TX_RX_POWERON 0x3 |
| #define PIPE3_PHY_TX_RX_POWEROFF 0x0 |
| |
| #define PCIE_PCS_MASK 0xFF0000 |
| #define PCIE_PCS_DELAY_COUNT_SHIFT 0x10 |
| |
| /* |
| * This is an Empirical value that works, need to confirm the actual |
| * value required for the PIPE3PHY_PLL_CONFIGURATION2.PLL_IDLE status |
| * to be correctly reflected in the PIPE3PHY_PLL_STATUS register. |
| */ |
| #define PLL_IDLE_TIME 100 /* in milliseconds */ |
| #define PLL_LOCK_TIME 100 /* in milliseconds */ |
| |
| struct pipe3_dpll_params { |
| u16 m; |
| u8 n; |
| u8 freq:3; |
| u8 sd; |
| u32 mf; |
| }; |
| |
| struct pipe3_dpll_map { |
| unsigned long rate; |
| struct pipe3_dpll_params params; |
| }; |
| |
| struct ti_pipe3 { |
| void __iomem *pll_ctrl_base; |
| struct device *dev; |
| struct device *control_dev; |
| struct clk *wkupclk; |
| struct clk *sys_clk; |
| struct clk *refclk; |
| struct clk *div_clk; |
| struct pipe3_dpll_map *dpll_map; |
| struct regmap *phy_power_syscon; /* ctrl. reg. acces */ |
| struct regmap *pcs_syscon; /* ctrl. reg. acces */ |
| struct regmap *dpll_reset_syscon; /* ctrl. reg. acces */ |
| unsigned int dpll_reset_reg; /* reg. index within syscon */ |
| unsigned int power_reg; /* power reg. index within syscon */ |
| unsigned int pcie_pcs_reg; /* pcs reg. index in syscon */ |
| bool sata_refclk_enabled; |
| }; |
| |
| static struct pipe3_dpll_map dpll_map_usb[] = { |
| {12000000, {1250, 5, 4, 20, 0} }, /* 12 MHz */ |
| {16800000, {3125, 20, 4, 20, 0} }, /* 16.8 MHz */ |
| {19200000, {1172, 8, 4, 20, 65537} }, /* 19.2 MHz */ |
| {20000000, {1000, 7, 4, 10, 0} }, /* 20 MHz */ |
| {26000000, {1250, 12, 4, 20, 0} }, /* 26 MHz */ |
| {38400000, {3125, 47, 4, 20, 92843} }, /* 38.4 MHz */ |
| { }, /* Terminator */ |
| }; |
| |
| static struct pipe3_dpll_map dpll_map_sata[] = { |
| {12000000, {1000, 7, 4, 6, 0} }, /* 12 MHz */ |
| {16800000, {714, 7, 4, 6, 0} }, /* 16.8 MHz */ |
| {19200000, {625, 7, 4, 6, 0} }, /* 19.2 MHz */ |
| {20000000, {600, 7, 4, 6, 0} }, /* 20 MHz */ |
| {26000000, {461, 7, 4, 6, 0} }, /* 26 MHz */ |
| {38400000, {312, 7, 4, 6, 0} }, /* 38.4 MHz */ |
| { }, /* Terminator */ |
| }; |
| |
| static inline u32 ti_pipe3_readl(void __iomem *addr, unsigned offset) |
| { |
| return __raw_readl(addr + offset); |
| } |
| |
| static inline void ti_pipe3_writel(void __iomem *addr, unsigned offset, |
| u32 data) |
| { |
| __raw_writel(data, addr + offset); |
| } |
| |
| static struct pipe3_dpll_params *ti_pipe3_get_dpll_params(struct ti_pipe3 *phy) |
| { |
| unsigned long rate; |
| struct pipe3_dpll_map *dpll_map = phy->dpll_map; |
| |
| rate = clk_get_rate(phy->sys_clk); |
| |
| for (; dpll_map->rate; dpll_map++) { |
| if (rate == dpll_map->rate) |
| return &dpll_map->params; |
| } |
| |
| dev_err(phy->dev, "No DPLL configuration for %lu Hz SYS CLK\n", rate); |
| |
| return NULL; |
| } |
| |
| static int ti_pipe3_enable_clocks(struct ti_pipe3 *phy); |
| static void ti_pipe3_disable_clocks(struct ti_pipe3 *phy); |
| |
| static int ti_pipe3_power_off(struct phy *x) |
| { |
| u32 val; |
| int ret; |
| struct ti_pipe3 *phy = phy_get_drvdata(x); |
| |
| if (!phy->phy_power_syscon) { |
| omap_control_phy_power(phy->control_dev, 0); |
| return 0; |
| } |
| |
| val = PIPE3_PHY_TX_RX_POWEROFF << PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT; |
| |
| ret = regmap_update_bits(phy->phy_power_syscon, phy->power_reg, |
| PIPE3_PHY_PWRCTL_CLK_CMD_MASK, val); |
| return ret; |
| } |
| |
| static int ti_pipe3_power_on(struct phy *x) |
| { |
| u32 val; |
| u32 mask; |
| int ret; |
| unsigned long rate; |
| struct ti_pipe3 *phy = phy_get_drvdata(x); |
| |
| if (!phy->phy_power_syscon) { |
| omap_control_phy_power(phy->control_dev, 1); |
| return 0; |
| } |
| |
| rate = clk_get_rate(phy->sys_clk); |
| if (!rate) { |
| dev_err(phy->dev, "Invalid clock rate\n"); |
| return -EINVAL; |
| } |
| rate = rate / 1000000; |
| mask = OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK | |
| OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_MASK; |
| val = PIPE3_PHY_TX_RX_POWERON << PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT; |
| val |= rate << OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT; |
| |
| ret = regmap_update_bits(phy->phy_power_syscon, phy->power_reg, |
| mask, val); |
| return ret; |
| } |
| |
| static int ti_pipe3_dpll_wait_lock(struct ti_pipe3 *phy) |
| { |
| u32 val; |
| unsigned long timeout; |
| |
| timeout = jiffies + msecs_to_jiffies(PLL_LOCK_TIME); |
| do { |
| cpu_relax(); |
| val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_STATUS); |
| if (val & PLL_LOCK) |
| return 0; |
| } while (!time_after(jiffies, timeout)); |
| |
| dev_err(phy->dev, "DPLL failed to lock\n"); |
| return -EBUSY; |
| } |
| |
| static int ti_pipe3_dpll_program(struct ti_pipe3 *phy) |
| { |
| u32 val; |
| struct pipe3_dpll_params *dpll_params; |
| |
| dpll_params = ti_pipe3_get_dpll_params(phy); |
| if (!dpll_params) |
| return -EINVAL; |
| |
| val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION1); |
| val &= ~PLL_REGN_MASK; |
| val |= dpll_params->n << PLL_REGN_SHIFT; |
| ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION1, val); |
| |
| val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2); |
| val &= ~PLL_SELFREQDCO_MASK; |
| val |= dpll_params->freq << PLL_SELFREQDCO_SHIFT; |
| ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val); |
| |
| val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION1); |
| val &= ~PLL_REGM_MASK; |
| val |= dpll_params->m << PLL_REGM_SHIFT; |
| ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION1, val); |
| |
| val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION4); |
| val &= ~PLL_REGM_F_MASK; |
| val |= dpll_params->mf << PLL_REGM_F_SHIFT; |
| ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION4, val); |
| |
| val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION3); |
| val &= ~PLL_SD_MASK; |
| val |= dpll_params->sd << PLL_SD_SHIFT; |
| ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION3, val); |
| |
| ti_pipe3_writel(phy->pll_ctrl_base, PLL_GO, SET_PLL_GO); |
| |
| return ti_pipe3_dpll_wait_lock(phy); |
| } |
| |
| static int ti_pipe3_init(struct phy *x) |
| { |
| struct ti_pipe3 *phy = phy_get_drvdata(x); |
| u32 val; |
| int ret = 0; |
| |
| ti_pipe3_enable_clocks(phy); |
| /* |
| * Set pcie_pcs register to 0x96 for proper functioning of phy |
| * as recommended in AM572x TRM SPRUHZ6, section 18.5.2.2, table |
| * 18-1804. |
| */ |
| if (of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-pcie")) { |
| if (!phy->pcs_syscon) { |
| omap_control_pcie_pcs(phy->control_dev, 0x96); |
| return 0; |
| } |
| |
| val = 0x96 << OMAP_CTRL_PCIE_PCS_DELAY_COUNT_SHIFT; |
| ret = regmap_update_bits(phy->pcs_syscon, phy->pcie_pcs_reg, |
| PCIE_PCS_MASK, val); |
| return ret; |
| } |
| |
| /* Bring it out of IDLE if it is IDLE */ |
| val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2); |
| if (val & PLL_IDLE) { |
| val &= ~PLL_IDLE; |
| ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val); |
| ret = ti_pipe3_dpll_wait_lock(phy); |
| } |
| |
| /* Program the DPLL only if not locked */ |
| val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_STATUS); |
| if (!(val & PLL_LOCK)) |
| if (ti_pipe3_dpll_program(phy)) |
| return -EINVAL; |
| |
| return ret; |
| } |
| |
| static int ti_pipe3_exit(struct phy *x) |
| { |
| struct ti_pipe3 *phy = phy_get_drvdata(x); |
| u32 val; |
| unsigned long timeout; |
| |
| /* If dpll_reset_syscon is not present we wont power down SATA DPLL |
| * due to Errata i783 |
| */ |
| if (of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-sata") && |
| !phy->dpll_reset_syscon) |
| return 0; |
| |
| /* PCIe doesn't have internal DPLL */ |
| if (!of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-pcie")) { |
| /* Put DPLL in IDLE mode */ |
| val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2); |
| val |= PLL_IDLE; |
| ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val); |
| |
| /* wait for LDO and Oscillator to power down */ |
| timeout = jiffies + msecs_to_jiffies(PLL_IDLE_TIME); |
| do { |
| cpu_relax(); |
| val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_STATUS); |
| if ((val & PLL_TICOPWDN) && (val & PLL_LDOPWDN)) |
| break; |
| } while (!time_after(jiffies, timeout)); |
| |
| if (!(val & PLL_TICOPWDN) || !(val & PLL_LDOPWDN)) { |
| dev_err(phy->dev, "Failed to power down: PLL_STATUS 0x%x\n", |
| val); |
| return -EBUSY; |
| } |
| } |
| |
| /* i783: SATA needs control bit toggle after PLL unlock */ |
| if (of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-sata")) { |
| regmap_update_bits(phy->dpll_reset_syscon, phy->dpll_reset_reg, |
| SATA_PLL_SOFT_RESET, SATA_PLL_SOFT_RESET); |
| regmap_update_bits(phy->dpll_reset_syscon, phy->dpll_reset_reg, |
| SATA_PLL_SOFT_RESET, 0); |
| } |
| |
| ti_pipe3_disable_clocks(phy); |
| |
| return 0; |
| } |
| static const struct phy_ops ops = { |
| .init = ti_pipe3_init, |
| .exit = ti_pipe3_exit, |
| .power_on = ti_pipe3_power_on, |
| .power_off = ti_pipe3_power_off, |
| .owner = THIS_MODULE, |
| }; |
| |
| static const struct of_device_id ti_pipe3_id_table[]; |
| |
| static int ti_pipe3_get_clk(struct ti_pipe3 *phy) |
| { |
| struct clk *clk; |
| struct device *dev = phy->dev; |
| struct device_node *node = dev->of_node; |
| |
| phy->refclk = devm_clk_get(dev, "refclk"); |
| if (IS_ERR(phy->refclk)) { |
| dev_err(dev, "unable to get refclk\n"); |
| /* older DTBs have missing refclk in SATA PHY |
| * so don't bail out in case of SATA PHY. |
| */ |
| if (!of_device_is_compatible(node, "ti,phy-pipe3-sata")) |
| return PTR_ERR(phy->refclk); |
| } |
| |
| if (!of_device_is_compatible(node, "ti,phy-pipe3-sata")) { |
| phy->wkupclk = devm_clk_get(dev, "wkupclk"); |
| if (IS_ERR(phy->wkupclk)) { |
| dev_err(dev, "unable to get wkupclk\n"); |
| return PTR_ERR(phy->wkupclk); |
| } |
| } else { |
| phy->wkupclk = ERR_PTR(-ENODEV); |
| } |
| |
| if (!of_device_is_compatible(node, "ti,phy-pipe3-pcie") || |
| phy->phy_power_syscon) { |
| phy->sys_clk = devm_clk_get(dev, "sysclk"); |
| if (IS_ERR(phy->sys_clk)) { |
| dev_err(dev, "unable to get sysclk\n"); |
| return -EINVAL; |
| } |
| } |
| |
| if (of_device_is_compatible(node, "ti,phy-pipe3-pcie")) { |
| clk = devm_clk_get(dev, "dpll_ref"); |
| if (IS_ERR(clk)) { |
| dev_err(dev, "unable to get dpll ref clk\n"); |
| return PTR_ERR(clk); |
| } |
| clk_set_rate(clk, 1500000000); |
| |
| clk = devm_clk_get(dev, "dpll_ref_m2"); |
| if (IS_ERR(clk)) { |
| dev_err(dev, "unable to get dpll ref m2 clk\n"); |
| return PTR_ERR(clk); |
| } |
| clk_set_rate(clk, 100000000); |
| |
| clk = devm_clk_get(dev, "phy-div"); |
| if (IS_ERR(clk)) { |
| dev_err(dev, "unable to get phy-div clk\n"); |
| return PTR_ERR(clk); |
| } |
| clk_set_rate(clk, 100000000); |
| |
| phy->div_clk = devm_clk_get(dev, "div-clk"); |
| if (IS_ERR(phy->div_clk)) { |
| dev_err(dev, "unable to get div-clk\n"); |
| return PTR_ERR(phy->div_clk); |
| } |
| } else { |
| phy->div_clk = ERR_PTR(-ENODEV); |
| } |
| |
| return 0; |
| } |
| |
| static int ti_pipe3_get_sysctrl(struct ti_pipe3 *phy) |
| { |
| struct device *dev = phy->dev; |
| struct device_node *node = dev->of_node; |
| struct device_node *control_node; |
| struct platform_device *control_pdev; |
| |
| phy->phy_power_syscon = syscon_regmap_lookup_by_phandle(node, |
| "syscon-phy-power"); |
| if (IS_ERR(phy->phy_power_syscon)) { |
| dev_dbg(dev, |
| "can't get syscon-phy-power, using control device\n"); |
| phy->phy_power_syscon = NULL; |
| } else { |
| if (of_property_read_u32_index(node, |
| "syscon-phy-power", 1, |
| &phy->power_reg)) { |
| dev_err(dev, "couldn't get power reg. offset\n"); |
| return -EINVAL; |
| } |
| } |
| |
| if (!phy->phy_power_syscon) { |
| control_node = of_parse_phandle(node, "ctrl-module", 0); |
| if (!control_node) { |
| dev_err(dev, "Failed to get control device phandle\n"); |
| return -EINVAL; |
| } |
| |
| control_pdev = of_find_device_by_node(control_node); |
| if (!control_pdev) { |
| dev_err(dev, "Failed to get control device\n"); |
| return -EINVAL; |
| } |
| |
| phy->control_dev = &control_pdev->dev; |
| } |
| |
| if (of_device_is_compatible(node, "ti,phy-pipe3-pcie")) { |
| phy->pcs_syscon = syscon_regmap_lookup_by_phandle(node, |
| "syscon-pcs"); |
| if (IS_ERR(phy->pcs_syscon)) { |
| dev_dbg(dev, |
| "can't get syscon-pcs, using omap control\n"); |
| phy->pcs_syscon = NULL; |
| } else { |
| if (of_property_read_u32_index(node, |
| "syscon-pcs", 1, |
| &phy->pcie_pcs_reg)) { |
| dev_err(dev, |
| "couldn't get pcie pcs reg. offset\n"); |
| return -EINVAL; |
| } |
| } |
| } |
| |
| if (of_device_is_compatible(node, "ti,phy-pipe3-sata")) { |
| phy->dpll_reset_syscon = syscon_regmap_lookup_by_phandle(node, |
| "syscon-pllreset"); |
| if (IS_ERR(phy->dpll_reset_syscon)) { |
| dev_info(dev, |
| "can't get syscon-pllreset, sata dpll won't idle\n"); |
| phy->dpll_reset_syscon = NULL; |
| } else { |
| if (of_property_read_u32_index(node, |
| "syscon-pllreset", 1, |
| &phy->dpll_reset_reg)) { |
| dev_err(dev, |
| "couldn't get pllreset reg. offset\n"); |
| return -EINVAL; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int ti_pipe3_get_pll_base(struct ti_pipe3 *phy) |
| { |
| struct resource *res; |
| const struct of_device_id *match; |
| struct device *dev = phy->dev; |
| struct device_node *node = dev->of_node; |
| struct platform_device *pdev = to_platform_device(dev); |
| |
| if (of_device_is_compatible(node, "ti,phy-pipe3-pcie")) |
| return 0; |
| |
| match = of_match_device(ti_pipe3_id_table, dev); |
| if (!match) |
| return -EINVAL; |
| |
| phy->dpll_map = (struct pipe3_dpll_map *)match->data; |
| if (!phy->dpll_map) { |
| dev_err(dev, "no DPLL data\n"); |
| return -EINVAL; |
| } |
| |
| res = platform_get_resource_byname(pdev, IORESOURCE_MEM, |
| "pll_ctrl"); |
| phy->pll_ctrl_base = devm_ioremap_resource(dev, res); |
| if (IS_ERR(phy->pll_ctrl_base)) |
| return PTR_ERR(phy->pll_ctrl_base); |
| |
| return 0; |
| } |
| |
| static int ti_pipe3_probe(struct platform_device *pdev) |
| { |
| struct ti_pipe3 *phy; |
| struct phy *generic_phy; |
| struct phy_provider *phy_provider; |
| struct device_node *node = pdev->dev.of_node; |
| struct device *dev = &pdev->dev; |
| int ret; |
| |
| phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL); |
| if (!phy) |
| return -ENOMEM; |
| |
| phy->dev = dev; |
| |
| ret = ti_pipe3_get_pll_base(phy); |
| if (ret) |
| return ret; |
| |
| ret = ti_pipe3_get_sysctrl(phy); |
| if (ret) |
| return ret; |
| |
| ret = ti_pipe3_get_clk(phy); |
| if (ret) |
| return ret; |
| |
| platform_set_drvdata(pdev, phy); |
| pm_runtime_enable(dev); |
| |
| /* |
| * Prevent auto-disable of refclk for SATA PHY due to Errata i783 |
| */ |
| if (of_device_is_compatible(node, "ti,phy-pipe3-sata")) { |
| if (!IS_ERR(phy->refclk)) { |
| clk_prepare_enable(phy->refclk); |
| phy->sata_refclk_enabled = true; |
| } |
| } |
| |
| generic_phy = devm_phy_create(dev, NULL, &ops); |
| if (IS_ERR(generic_phy)) |
| return PTR_ERR(generic_phy); |
| |
| phy_set_drvdata(generic_phy, phy); |
| |
| ti_pipe3_power_off(generic_phy); |
| |
| phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); |
| if (IS_ERR(phy_provider)) |
| return PTR_ERR(phy_provider); |
| |
| return 0; |
| } |
| |
| static int ti_pipe3_remove(struct platform_device *pdev) |
| { |
| pm_runtime_disable(&pdev->dev); |
| |
| return 0; |
| } |
| |
| static int ti_pipe3_enable_clocks(struct ti_pipe3 *phy) |
| { |
| int ret = 0; |
| |
| if (!IS_ERR(phy->refclk)) { |
| ret = clk_prepare_enable(phy->refclk); |
| if (ret) { |
| dev_err(phy->dev, "Failed to enable refclk %d\n", ret); |
| return ret; |
| } |
| } |
| |
| if (!IS_ERR(phy->wkupclk)) { |
| ret = clk_prepare_enable(phy->wkupclk); |
| if (ret) { |
| dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret); |
| goto disable_refclk; |
| } |
| } |
| |
| if (!IS_ERR(phy->div_clk)) { |
| ret = clk_prepare_enable(phy->div_clk); |
| if (ret) { |
| dev_err(phy->dev, "Failed to enable div_clk %d\n", ret); |
| goto disable_wkupclk; |
| } |
| } |
| |
| return 0; |
| |
| disable_wkupclk: |
| if (!IS_ERR(phy->wkupclk)) |
| clk_disable_unprepare(phy->wkupclk); |
| |
| disable_refclk: |
| if (!IS_ERR(phy->refclk)) |
| clk_disable_unprepare(phy->refclk); |
| |
| return ret; |
| } |
| |
| static void ti_pipe3_disable_clocks(struct ti_pipe3 *phy) |
| { |
| if (!IS_ERR(phy->wkupclk)) |
| clk_disable_unprepare(phy->wkupclk); |
| if (!IS_ERR(phy->refclk)) { |
| clk_disable_unprepare(phy->refclk); |
| /* |
| * SATA refclk needs an additional disable as we left it |
| * on in probe to avoid Errata i783 |
| */ |
| if (phy->sata_refclk_enabled) { |
| clk_disable_unprepare(phy->refclk); |
| phy->sata_refclk_enabled = false; |
| } |
| } |
| |
| if (!IS_ERR(phy->div_clk)) |
| clk_disable_unprepare(phy->div_clk); |
| } |
| |
| static const struct of_device_id ti_pipe3_id_table[] = { |
| { |
| .compatible = "ti,phy-usb3", |
| .data = dpll_map_usb, |
| }, |
| { |
| .compatible = "ti,omap-usb3", |
| .data = dpll_map_usb, |
| }, |
| { |
| .compatible = "ti,phy-pipe3-sata", |
| .data = dpll_map_sata, |
| }, |
| { |
| .compatible = "ti,phy-pipe3-pcie", |
| }, |
| {} |
| }; |
| MODULE_DEVICE_TABLE(of, ti_pipe3_id_table); |
| |
| static struct platform_driver ti_pipe3_driver = { |
| .probe = ti_pipe3_probe, |
| .remove = ti_pipe3_remove, |
| .driver = { |
| .name = "ti-pipe3", |
| .of_match_table = ti_pipe3_id_table, |
| }, |
| }; |
| |
| module_platform_driver(ti_pipe3_driver); |
| |
| MODULE_ALIAS("platform:ti_pipe3"); |
| MODULE_AUTHOR("Texas Instruments Inc."); |
| MODULE_DESCRIPTION("TI PIPE3 phy driver"); |
| MODULE_LICENSE("GPL v2"); |