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58acb1dd2c
This adds a bunch of patches for the v6.1 Gemini kernel. For v5.15 this was down to a single upstream patch, but for kernel v6.2 I reworked the USB code for FOTG210, so instead of carrying over the half-baked and incomplete patch from v5.15 I just backported all the v6.2 patches, 31 in total, as it creates full device USB mode for e.g. D-Link DNS-313. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
197 lines
5.1 KiB
Diff
197 lines
5.1 KiB
Diff
From fb8e1e8dbc47e7aff7624b47adaa0a84d2983802 Mon Sep 17 00:00:00 2001
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From: Linus Walleij <linus.walleij@linaro.org>
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Date: Wed, 18 Jan 2023 08:09:18 +0100
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Subject: [PATCH 18/29] usb: fotg210: Move clock handling to core
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Grab the optional silicon block clock, prepare and enable it in
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the core before proceeding to prepare the host or peripheral
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driver. This saves duplicate code and also uses the simple
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devm_clk_get_optional_enabled() to do everything we really
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want to do.
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Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Link: https://lore.kernel.org/r/20230103-gemini-fotg210-usb-v2-4-100388af9810@linaro.org
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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--- a/drivers/usb/fotg210/fotg210-core.c
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+++ b/drivers/usb/fotg210/fotg210-core.c
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@@ -6,6 +6,7 @@
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* driver.
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*/
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#include <linux/bitops.h>
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+#include <linux/clk.h>
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#include <linux/device.h>
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#include <linux/mfd/syscon.h>
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#include <linux/module.h>
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@@ -109,6 +110,10 @@ static int fotg210_probe(struct platform
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if (!fotg->base)
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return -ENOMEM;
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+ fotg->pclk = devm_clk_get_optional_enabled(dev, "PCLK");
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+ if (IS_ERR(fotg->pclk))
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+ return PTR_ERR(fotg->pclk);
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+
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mode = usb_get_dr_mode(dev);
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if (of_device_is_compatible(dev->of_node, "cortina,gemini-usb")) {
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--- a/drivers/usb/fotg210/fotg210-hcd.c
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+++ b/drivers/usb/fotg210/fotg210-hcd.c
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@@ -33,7 +33,6 @@
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/iopoll.h>
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-#include <linux/clk.h>
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#include <asm/byteorder.h>
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#include <asm/irq.h>
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@@ -5594,44 +5593,22 @@ int fotg210_hcd_probe(struct platform_de
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fotg210->fotg = fotg;
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fotg210->caps = hcd->regs;
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- /* It's OK not to supply this clock */
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- fotg210->pclk = clk_get(dev, "PCLK");
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- if (!IS_ERR(fotg210->pclk)) {
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- retval = clk_prepare_enable(fotg210->pclk);
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- if (retval) {
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- dev_err(dev, "failed to enable PCLK\n");
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- goto failed_put_hcd;
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- }
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- } else if (PTR_ERR(fotg210->pclk) == -EPROBE_DEFER) {
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- /*
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- * Percolate deferrals, for anything else,
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- * just live without the clocking.
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- */
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- retval = PTR_ERR(fotg210->pclk);
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- goto failed_dis_clk;
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- }
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-
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retval = fotg210_setup(hcd);
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if (retval)
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- goto failed_dis_clk;
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+ goto failed_put_hcd;
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fotg210_init(fotg210);
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retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
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if (retval) {
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dev_err(dev, "failed to add hcd with err %d\n", retval);
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- goto failed_dis_clk;
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+ goto failed_put_hcd;
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}
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device_wakeup_enable(hcd->self.controller);
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platform_set_drvdata(pdev, hcd);
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return retval;
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-failed_dis_clk:
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- if (!IS_ERR(fotg210->pclk)) {
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- clk_disable_unprepare(fotg210->pclk);
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- clk_put(fotg210->pclk);
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- }
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failed_put_hcd:
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usb_put_hcd(hcd);
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fail_create_hcd:
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@@ -5647,12 +5624,6 @@ fail_create_hcd:
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int fotg210_hcd_remove(struct platform_device *pdev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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- struct fotg210_hcd *fotg210 = hcd_to_fotg210(hcd);
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-
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- if (!IS_ERR(fotg210->pclk)) {
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- clk_disable_unprepare(fotg210->pclk);
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- clk_put(fotg210->pclk);
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- }
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usb_remove_hcd(hcd);
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usb_put_hcd(hcd);
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--- a/drivers/usb/fotg210/fotg210-udc.c
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+++ b/drivers/usb/fotg210/fotg210-udc.c
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@@ -15,7 +15,6 @@
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#include <linux/platform_device.h>
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#include <linux/usb/ch9.h>
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#include <linux/usb/gadget.h>
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-#include <linux/clk.h>
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#include <linux/usb/otg.h>
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#include <linux/usb/phy.h>
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@@ -1147,9 +1146,6 @@ int fotg210_udc_remove(struct platform_d
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for (i = 0; i < FOTG210_MAX_NUM_EP; i++)
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kfree(fotg210->ep[i]);
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- if (!IS_ERR(fotg210->pclk))
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- clk_disable_unprepare(fotg210->pclk);
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-
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kfree(fotg210);
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return 0;
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@@ -1177,34 +1173,17 @@ int fotg210_udc_probe(struct platform_de
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fotg210->dev = dev;
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fotg210->fotg = fotg;
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- /* It's OK not to supply this clock */
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- fotg210->pclk = devm_clk_get(dev, "PCLK");
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- if (!IS_ERR(fotg210->pclk)) {
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- ret = clk_prepare_enable(fotg210->pclk);
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- if (ret) {
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- dev_err(dev, "failed to enable PCLK\n");
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- goto err;
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- }
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- } else if (PTR_ERR(fotg210->pclk) == -EPROBE_DEFER) {
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- /*
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- * Percolate deferrals, for anything else,
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- * just live without the clocking.
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- */
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- ret = -EPROBE_DEFER;
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- goto err;
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- }
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-
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fotg210->phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 0);
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if (IS_ERR(fotg210->phy)) {
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ret = PTR_ERR(fotg210->phy);
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if (ret == -EPROBE_DEFER)
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- goto err_pclk;
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+ goto err_free;
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dev_info(dev, "no PHY found\n");
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fotg210->phy = NULL;
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} else {
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ret = usb_phy_init(fotg210->phy);
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if (ret)
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- goto err_pclk;
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+ goto err_free;
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dev_info(dev, "found and initialized PHY\n");
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}
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@@ -1303,11 +1282,8 @@ err_map:
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err_alloc:
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for (i = 0; i < FOTG210_MAX_NUM_EP; i++)
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kfree(fotg210->ep[i]);
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-err_pclk:
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- if (!IS_ERR(fotg210->pclk))
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- clk_disable_unprepare(fotg210->pclk);
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-err:
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+err_free:
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kfree(fotg210);
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return ret;
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}
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--- a/drivers/usb/fotg210/fotg210-udc.h
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+++ b/drivers/usb/fotg210/fotg210-udc.h
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@@ -231,7 +231,6 @@ struct fotg210_ep {
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struct fotg210_udc {
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spinlock_t lock; /* protect the struct */
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void __iomem *reg;
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- struct clk *pclk;
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unsigned long irq_trigger;
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--- a/drivers/usb/fotg210/fotg210.h
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+++ b/drivers/usb/fotg210/fotg210.h
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@@ -12,6 +12,7 @@ struct fotg210 {
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struct device *dev;
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struct resource *res;
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void __iomem *base;
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+ struct clk *pclk;
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struct regmap *map;
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enum gemini_port port;
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};
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