diff options
Diffstat (limited to 'drivers/ata/sata_gemini.c')
| -rw-r--r-- | drivers/ata/sata_gemini.c | 66 |
1 files changed, 15 insertions, 51 deletions
diff --git a/drivers/ata/sata_gemini.c b/drivers/ata/sata_gemini.c index 46950e0267e0..530ee26b3012 100644 --- a/drivers/ata/sata_gemini.c +++ b/drivers/ata/sata_gemini.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Cortina Systems Gemini SATA bridge add-on to Faraday FTIDE010 * Copyright (C) 2017 Linus Walleij <linus.walleij@linaro.org> @@ -10,9 +11,7 @@ #include <linux/mfd/syscon.h> #include <linux/regmap.h> #include <linux/delay.h> -#include <linux/reset.h> -#include <linux/of_address.h> -#include <linux/of_device.h> +#include <linux/of.h> #include <linux/clk.h> #include <linux/io.h> #include <linux/pinctrl/consumer.h> @@ -27,8 +26,6 @@ * @muxmode: the current muxing mode * @ide_pins: if the device is using the plain IDE interface pins * @sata_bridge: if the device enables the SATA bridge - * @sata0_reset: SATA0 reset handler - * @sata1_reset: SATA1 reset handler * @sata0_pclk: SATA0 PCLK handler * @sata1_pclk: SATA1 PCLK handler */ @@ -38,8 +35,6 @@ struct sata_gemini { enum gemini_muxmode muxmode; bool ide_pins; bool sata_bridge; - struct reset_control *sata0_reset; - struct reset_control *sata1_reset; struct clk *sata0_pclk; struct clk *sata1_pclk; }; @@ -200,7 +195,10 @@ int gemini_sata_start_bridge(struct sata_gemini *sg, unsigned int bridge) pclk = sg->sata0_pclk; else pclk = sg->sata1_pclk; - clk_enable(pclk); + ret = clk_enable(pclk); + if (ret) + return ret; + msleep(10); /* Do not keep clocking a bridge that is not online */ @@ -221,18 +219,6 @@ void gemini_sata_stop_bridge(struct sata_gemini *sg, unsigned int bridge) } EXPORT_SYMBOL(gemini_sata_stop_bridge); -int gemini_sata_reset_bridge(struct sata_gemini *sg, - unsigned int bridge) -{ - if (bridge == 0) - reset_control_reset(sg->sata0_reset); - else - reset_control_reset(sg->sata1_reset); - msleep(10); - return gemini_sata_setup_bridge(sg, bridge); -} -EXPORT_SYMBOL(gemini_sata_reset_bridge); - static int gemini_sata_bridge_init(struct sata_gemini *sg) { struct device *dev = sg->dev; @@ -252,31 +238,16 @@ static int gemini_sata_bridge_init(struct sata_gemini *sg) ret = clk_prepare_enable(sg->sata0_pclk); if (ret) { - pr_err("failed to enable SATA0 PCLK\n"); + dev_err(dev, "failed to enable SATA0 PCLK\n"); return ret; } ret = clk_prepare_enable(sg->sata1_pclk); if (ret) { - pr_err("failed to enable SATA1 PCLK\n"); + dev_err(dev, "failed to enable SATA1 PCLK\n"); clk_disable_unprepare(sg->sata0_pclk); return ret; } - sg->sata0_reset = devm_reset_control_get_exclusive(dev, "sata0"); - if (IS_ERR(sg->sata0_reset)) { - dev_err(dev, "no SATA0 reset controller\n"); - clk_disable_unprepare(sg->sata1_pclk); - clk_disable_unprepare(sg->sata0_pclk); - return PTR_ERR(sg->sata0_reset); - } - sg->sata1_reset = devm_reset_control_get_exclusive(dev, "sata1"); - if (IS_ERR(sg->sata1_reset)) { - dev_err(dev, "no SATA1 reset controller\n"); - clk_disable_unprepare(sg->sata1_pclk); - clk_disable_unprepare(sg->sata0_pclk); - return PTR_ERR(sg->sata1_reset); - } - sata_id = readl(sg->base + GEMINI_SATA_ID); sata_phy_id = readl(sg->base + GEMINI_SATA_PHY_ID); sg->sata_bridge = true; @@ -317,7 +288,6 @@ static int gemini_sata_probe(struct platform_device *pdev) struct device_node *np = dev->of_node; struct sata_gemini *sg; struct regmap *map; - struct resource *res; enum gemini_muxmode muxmode; u32 gmode; u32 gmask; @@ -328,11 +298,7 @@ static int gemini_sata_probe(struct platform_device *pdev) return -ENOMEM; sg->dev = dev; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; - - sg->base = devm_ioremap_resource(dev, res); + sg->base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(sg->base)) return PTR_ERR(sg->base); @@ -404,7 +370,7 @@ out_unprep_clk: return ret; } -static int gemini_sata_remove(struct platform_device *pdev) +static void gemini_sata_remove(struct platform_device *pdev) { struct sata_gemini *sg = platform_get_drvdata(pdev); @@ -413,27 +379,25 @@ static int gemini_sata_remove(struct platform_device *pdev) clk_unprepare(sg->sata0_pclk); } sg_singleton = NULL; - - return 0; } static const struct of_device_id gemini_sata_of_match[] = { - { - .compatible = "cortina,gemini-sata-bridge", - }, - {}, + { .compatible = "cortina,gemini-sata-bridge", }, + { /* sentinel */ } }; +MODULE_DEVICE_TABLE(of, gemini_sata_of_match); static struct platform_driver gemini_sata_driver = { .driver = { .name = DRV_NAME, - .of_match_table = of_match_ptr(gemini_sata_of_match), + .of_match_table = gemini_sata_of_match, }, .probe = gemini_sata_probe, .remove = gemini_sata_remove, }; module_platform_driver(gemini_sata_driver); +MODULE_DESCRIPTION("low level driver for Cortina Systems Gemini SATA bridge"); MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:" DRV_NAME); |