diff options
Diffstat (limited to 'drivers/mfd/omap-usb-tll.c')
| -rw-r--r-- | drivers/mfd/omap-usb-tll.c | 94 |
1 files changed, 32 insertions, 62 deletions
diff --git a/drivers/mfd/omap-usb-tll.c b/drivers/mfd/omap-usb-tll.c index 6f5300b0eb31..0f7fdb99c809 100644 --- a/drivers/mfd/omap-usb-tll.c +++ b/drivers/mfd/omap-usb-tll.c @@ -1,21 +1,10 @@ -/** +// SPDX-License-Identifier: GPL-2.0-only +/* * omap-usb-tll.c - The USB TLL driver for OMAP EHCI & OHCI * - * Copyright (C) 2012-2013 Texas Instruments Incorporated - http://www.ti.com + * Copyright (C) 2012-2013 Texas Instruments Incorporated - https://www.ti.com * Author: Keshava Munegowda <keshava_mgowda@ti.com> * Author: Roger Quadros <rogerq@ti.com> - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 of - * the License as published by the Free Software Foundation. - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include <linux/kernel.h> #include <linux/module.h> @@ -108,9 +97,9 @@ (x) != OMAP_EHCI_PORT_MODE_PHY) struct usbtll_omap { - int nch; /* num. of channels */ - struct clk **ch_clk; - void __iomem *base; + void __iomem *base; + int nch; + struct clk *ch_clk[] __counted_by(nch); }; /*-------------------------------------------------------------------------*/ @@ -131,16 +120,11 @@ static inline u32 usbtll_read(void __iomem *base, u32 reg) return readl_relaxed(base + reg); } -static inline void usbtll_writeb(void __iomem *base, u8 reg, u8 val) +static inline void usbtll_writeb(void __iomem *base, u32 reg, u8 val) { writeb_relaxed(val, base + reg); } -static inline u8 usbtll_readb(void __iomem *base, u8 reg) -{ - return readb_relaxed(base + reg); -} - /*-------------------------------------------------------------------------*/ static bool is_ohci_port(enum usbhs_omap_port_mode pmode) @@ -210,59 +194,54 @@ static unsigned ohci_omap3_fslsmode(enum usbhs_omap_port_mode mode) * usbtll_omap_probe - initialize TI-based HCDs * * Allocates basic resources for this USB host controller. + * + * @pdev: Pointer to this device's platform device structure */ static int usbtll_omap_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; - struct resource *res; struct usbtll_omap *tll; - int ret = 0; - int i, ver; + void __iomem *base; + int i, nch, ver; dev_dbg(dev, "starting TI HSUSB TLL Controller\n"); - tll = devm_kzalloc(dev, sizeof(struct usbtll_omap), GFP_KERNEL); - if (!tll) { - dev_err(dev, "Memory allocation failed\n"); - return -ENOMEM; - } - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - tll->base = devm_ioremap_resource(dev, res); - if (IS_ERR(tll->base)) - return PTR_ERR(tll->base); + base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(base)) + return PTR_ERR(base); - platform_set_drvdata(pdev, tll); pm_runtime_enable(dev); pm_runtime_get_sync(dev); - ver = usbtll_read(tll->base, OMAP_USBTLL_REVISION); + ver = usbtll_read(base, OMAP_USBTLL_REVISION); switch (ver) { case OMAP_USBTLL_REV1: case OMAP_USBTLL_REV4: - tll->nch = OMAP_TLL_CHANNEL_COUNT; + nch = OMAP_TLL_CHANNEL_COUNT; break; case OMAP_USBTLL_REV2: case OMAP_USBTLL_REV3: - tll->nch = OMAP_REV2_TLL_CHANNEL_COUNT; + nch = OMAP_REV2_TLL_CHANNEL_COUNT; break; default: - tll->nch = OMAP_TLL_CHANNEL_COUNT; - dev_dbg(dev, - "USB TLL Rev : 0x%x not recognized, assuming %d channels\n", - ver, tll->nch); + nch = OMAP_TLL_CHANNEL_COUNT; + dev_dbg(dev, "rev 0x%x not recognized, assuming %d channels\n", + ver, nch); break; } - tll->ch_clk = devm_kzalloc(dev, sizeof(struct clk *) * tll->nch, - GFP_KERNEL); - if (!tll->ch_clk) { - ret = -ENOMEM; - dev_err(dev, "Couldn't allocate memory for channel clocks\n"); - goto err_clk_alloc; + tll = devm_kzalloc(dev, struct_size(tll, ch_clk, nch), GFP_KERNEL); + if (!tll) { + pm_runtime_put_sync(dev); + pm_runtime_disable(dev); + return -ENOMEM; } - for (i = 0; i < tll->nch; i++) { + tll->base = base; + tll->nch = nch; + platform_set_drvdata(pdev, tll); + + for (i = 0; i < nch; i++) { char clkname[] = "usb_tll_hs_usb_chx_clk"; snprintf(clkname, sizeof(clkname), @@ -282,12 +261,6 @@ static int usbtll_omap_probe(struct platform_device *pdev) spin_unlock(&tll_lock); return 0; - -err_clk_alloc: - pm_runtime_put_sync(dev); - pm_runtime_disable(dev); - - return ret; } /** @@ -296,7 +269,7 @@ err_clk_alloc: * * Reverses the effect of usbtll_omap_probe(). */ -static int usbtll_omap_remove(struct platform_device *pdev) +static void usbtll_omap_remove(struct platform_device *pdev) { struct usbtll_omap *tll = platform_get_drvdata(pdev); int i; @@ -313,7 +286,6 @@ static int usbtll_omap_remove(struct platform_device *pdev) } pm_runtime_disable(&pdev->dev); - return 0; } static const struct of_device_id usbtll_omap_dt_ids[] = { @@ -325,7 +297,7 @@ MODULE_DEVICE_TABLE(of, usbtll_omap_dt_ids); static struct platform_driver usbtll_omap_driver = { .driver = { - .name = (char *)usbtll_driver_name, + .name = usbtll_driver_name, .of_match_table = usbtll_omap_dt_ids, }, .probe = usbtll_omap_probe, @@ -469,8 +441,6 @@ EXPORT_SYMBOL_GPL(omap_tll_disable); MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@ti.com>"); MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>"); -MODULE_ALIAS("platform:" USBHS_DRIVER_NAME); -MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("usb tll driver for TI OMAP EHCI and OHCI controllers"); static int __init omap_usbtll_drvinit(void) |