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linux/drivers/clk/renesas/rcar-usb2-clock-sel.c

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clk: renesas: use SPDX identifier for Renesas drivers Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2018-08-22 00:02:14 +02:00
// SPDX-License-Identifier: GPL-2.0
clk: renesas: rcar-usb2-clock-sel: Add R-Car USB 2.0 clock selector PHY R-Car USB 2.0 controller can change the clock source from an oscillator to an external clock via a register. So, this patch adds support the clock source selector as a clock driver. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2017-07-25 15:26:27 +09:00
/*
* Renesas R-Car USB2.0 clock selector
*
* Copyright (C) 2017 Renesas Electronics Corp.
*
* Based on renesas-cpg-mssr.c
*
* Copyright (C) 2015 Glider bvba
*/
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/device.h>
#include <linux/init.h>
clk: Remove io.h from clk-provider.h Now that we've gotten rid of clk_readl() we can remove io.h from the clk-provider header and push out the io.h include to any code that isn't already including the io.h header but using things like readl/writel, etc. Found with this grep: git grep -l clk-provider.h | grep '.c$' | xargs git grep -L 'linux/io.h' | \ xargs git grep -l \ -e '\<__iowrite32_copy\>' --or \ -e '\<__ioread32_copy\>' --or \ -e '\<__iowrite64_copy\>' --or \ -e '\<ioremap_page_range\>' --or \ -e '\<ioremap_huge_init\>' --or \ -e '\<arch_ioremap_pud_supported\>' --or \ -e '\<arch_ioremap_pmd_supported\>' --or \ -e '\<devm_ioport_map\>' --or \ -e '\<devm_ioport_unmap\>' --or \ -e '\<IOMEM_ERR_PTR\>' --or \ -e '\<devm_ioremap\>' --or \ -e '\<devm_ioremap_nocache\>' --or \ -e '\<devm_ioremap_wc\>' --or \ -e '\<devm_iounmap\>' --or \ -e '\<devm_ioremap_release\>' --or \ -e '\<devm_memremap\>' --or \ -e '\<devm_memunmap\>' --or \ -e '\<__devm_memremap_pages\>' --or \ -e '\<pci_remap_cfgspace\>' --or \ -e '\<arch_has_dev_port\>' --or \ -e '\<arch_phys_wc_add\>' --or \ -e '\<arch_phys_wc_del\>' --or \ -e '\<memremap\>' --or \ -e '\<memunmap\>' --or \ -e '\<arch_io_reserve_memtype_wc\>' --or \ -e '\<arch_io_free_memtype_wc\>' --or \ -e '\<__io_aw\>' --or \ -e '\<__io_pbw\>' --or \ -e '\<__io_paw\>' --or \ -e '\<__io_pbr\>' --or \ -e '\<__io_par\>' --or \ -e '\<__raw_readb\>' --or \ -e '\<__raw_readw\>' --or \ -e '\<__raw_readl\>' --or \ -e '\<__raw_readq\>' --or \ -e '\<__raw_writeb\>' --or \ -e '\<__raw_writew\>' --or \ -e '\<__raw_writel\>' --or \ -e '\<__raw_writeq\>' --or \ -e '\<readb\>' --or \ -e '\<readw\>' --or \ -e '\<readl\>' --or \ -e '\<readq\>' --or \ -e '\<writeb\>' --or \ -e '\<writew\>' --or \ -e '\<writel\>' --or \ -e '\<writeq\>' --or \ -e '\<readb_relaxed\>' --or \ -e '\<readw_relaxed\>' --or \ -e '\<readl_relaxed\>' --or \ -e '\<readq_relaxed\>' --or \ -e '\<writeb_relaxed\>' --or \ -e '\<writew_relaxed\>' --or \ -e '\<writel_relaxed\>' --or \ -e '\<writeq_relaxed\>' --or \ -e '\<readsb\>' --or \ -e '\<readsw\>' --or \ -e '\<readsl\>' --or \ -e '\<readsq\>' --or \ -e '\<writesb\>' --or \ -e '\<writesw\>' --or \ -e '\<writesl\>' --or \ -e '\<writesq\>' --or \ -e '\<inb\>' --or \ -e '\<inw\>' --or \ -e '\<inl\>' --or \ -e '\<outb\>' --or \ -e '\<outw\>' --or \ -e '\<outl\>' --or \ -e '\<inb_p\>' --or \ -e '\<inw_p\>' --or \ -e '\<inl_p\>' --or \ -e '\<outb_p\>' --or \ -e '\<outw_p\>' --or \ -e '\<outl_p\>' --or \ -e '\<insb\>' --or \ -e '\<insw\>' --or \ -e '\<insl\>' --or \ -e '\<outsb\>' --or \ -e '\<outsw\>' --or \ -e '\<outsl\>' --or \ -e '\<insb_p\>' --or \ -e '\<insw_p\>' --or \ -e '\<insl_p\>' --or \ -e '\<outsb_p\>' --or \ -e '\<outsw_p\>' --or \ -e '\<outsl_p\>' --or \ -e '\<ioread8\>' --or \ -e '\<ioread16\>' --or \ -e '\<ioread32\>' --or \ -e '\<ioread64\>' --or \ -e '\<iowrite8\>' --or \ -e '\<iowrite16\>' --or \ -e '\<iowrite32\>' --or \ -e '\<iowrite64\>' --or \ -e '\<ioread16be\>' --or \ -e '\<ioread32be\>' --or \ -e '\<ioread64be\>' --or \ -e '\<iowrite16be\>' --or \ -e '\<iowrite32be\>' --or \ -e '\<iowrite64be\>' --or \ -e '\<ioread8_rep\>' --or \ -e '\<ioread16_rep\>' --or \ -e '\<ioread32_rep\>' --or \ -e '\<ioread64_rep\>' --or \ -e '\<iowrite8_rep\>' --or \ -e '\<iowrite16_rep\>' --or \ -e '\<iowrite32_rep\>' --or \ -e '\<iowrite64_rep\>' --or \ -e '\<__io_virt\>' --or \ -e '\<pci_iounmap\>' --or \ -e '\<virt_to_phys\>' --or \ -e '\<phys_to_virt\>' --or \ -e '\<ioremap_uc\>' --or \ -e '\<ioremap\>' --or \ -e '\<__ioremap\>' --or \ -e '\<iounmap\>' --or \ -e '\<ioremap\>' --or \ -e '\<ioremap_nocache\>' --or \ -e '\<ioremap_uc\>' --or \ -e '\<ioremap_wc\>' --or \ -e '\<ioremap_wc\>' --or \ -e '\<ioremap_wt\>' --or \ -e '\<ioport_map\>' --or \ -e '\<ioport_unmap\>' --or \ -e '\<ioport_map\>' --or \ -e '\<ioport_unmap\>' --or \ -e '\<xlate_dev_kmem_ptr\>' --or \ -e '\<xlate_dev_mem_ptr\>' --or \ -e '\<unxlate_dev_mem_ptr\>' --or \ -e '\<virt_to_bus\>' --or \ -e '\<bus_to_virt\>' --or \ -e '\<memset_io\>' --or \ -e '\<memcpy_fromio\>' --or \ -e '\<memcpy_toio\>' I also reordered a couple includes when they weren't alphabetical and removed clk.h from kona, replacing it with clk-provider.h because that driver doesn't use clk consumer APIs. Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Chen-Yu Tsai <wens@csie.org> Acked-by: Maxime Ripard <maxime.ripard@bootlin.com> Acked-by: Tero Kristo <t-kristo@ti.com> Acked-by: Sekhar Nori <nsekhar@ti.com> Cc: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Mark Brown <broonie@kernel.org> Cc: Chris Zankel <chris@zankel.net> Acked-by: Max Filippov <jcmvbkbc@gmail.com> Acked-by: John Crispin <john@phrozen.org> Acked-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2019-04-18 15:20:22 -07:00
#include <linux/io.h>
clk: renesas: rcar-usb2-clock-sel: Add R-Car USB 2.0 clock selector PHY R-Car USB 2.0 controller can change the clock source from an oscillator to an external clock via a register. So, this patch adds support the clock source selector as a clock driver. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2017-07-25 15:26:27 +09:00
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
clk: renesas: rcar-usb2-clock-sel: Add reset_control This hardware needs to deassert resets of both host and peripheral. So, this patch adds reset control. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Link: https://lore.kernel.org/r/1583304137-28482-5-git-send-email-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2020-03-04 15:42:17 +09:00
#include <linux/reset.h>
clk: renesas: rcar-usb2-clock-sel: Add R-Car USB 2.0 clock selector PHY R-Car USB 2.0 controller can change the clock source from an oscillator to an external clock via a register. So, this patch adds support the clock source selector as a clock driver. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2017-07-25 15:26:27 +09:00
#include <linux/slab.h>
#define USB20_CLKSET0 0x00
#define CLKSET0_INTCLK_EN BIT(11)
#define CLKSET0_PRIVATE BIT(0)
#define CLKSET0_EXTAL_ONLY (CLKSET0_INTCLK_EN | CLKSET0_PRIVATE)
clk: renesas: rcar-usb2-clock-sel: Add multiple clocks management This hardware needs to enable clocks of both host and peripheral. So, this patch adds multiple clocks management. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Link: https://lore.kernel.org/r/1583304137-28482-4-git-send-email-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2020-03-04 15:42:16 +09:00
static const struct clk_bulk_data rcar_usb2_clocks[] = {
{ .id = "ehci_ohci", },
{ .id = "hs-usb-if", },
};
clk: renesas: rcar-usb2-clock-sel: Add R-Car USB 2.0 clock selector PHY R-Car USB 2.0 controller can change the clock source from an oscillator to an external clock via a register. So, this patch adds support the clock source selector as a clock driver. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2017-07-25 15:26:27 +09:00
struct usb2_clock_sel_priv {
void __iomem *base;
struct clk_hw hw;
clk: renesas: rcar-usb2-clock-sel: Add multiple clocks management This hardware needs to enable clocks of both host and peripheral. So, this patch adds multiple clocks management. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Link: https://lore.kernel.org/r/1583304137-28482-4-git-send-email-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2020-03-04 15:42:16 +09:00
struct clk_bulk_data clks[ARRAY_SIZE(rcar_usb2_clocks)];
clk: renesas: rcar-usb2-clock-sel: Add reset_control This hardware needs to deassert resets of both host and peripheral. So, this patch adds reset control. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Link: https://lore.kernel.org/r/1583304137-28482-5-git-send-email-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2020-03-04 15:42:17 +09:00
struct reset_control *rsts;
clk: renesas: rcar-usb2-clock-sel: Add R-Car USB 2.0 clock selector PHY R-Car USB 2.0 controller can change the clock source from an oscillator to an external clock via a register. So, this patch adds support the clock source selector as a clock driver. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2017-07-25 15:26:27 +09:00
bool extal;
bool xtal;
};
#define to_priv(_hw) container_of(_hw, struct usb2_clock_sel_priv, hw)
static void usb2_clock_sel_enable_extal_only(struct usb2_clock_sel_priv *priv)
{
u16 val = readw(priv->base + USB20_CLKSET0);
pr_debug("%s: enter %d %d %x\n", __func__,
priv->extal, priv->xtal, val);
if (priv->extal && !priv->xtal && val != CLKSET0_EXTAL_ONLY)
writew(CLKSET0_EXTAL_ONLY, priv->base + USB20_CLKSET0);
}
static void usb2_clock_sel_disable_extal_only(struct usb2_clock_sel_priv *priv)
{
if (priv->extal && !priv->xtal)
writew(CLKSET0_PRIVATE, priv->base + USB20_CLKSET0);
}
static int usb2_clock_sel_enable(struct clk_hw *hw)
{
clk: renesas: rcar-usb2-clock-sel: Add multiple clocks management This hardware needs to enable clocks of both host and peripheral. So, this patch adds multiple clocks management. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Link: https://lore.kernel.org/r/1583304137-28482-4-git-send-email-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2020-03-04 15:42:16 +09:00
struct usb2_clock_sel_priv *priv = to_priv(hw);
int ret;
clk: renesas: rcar-usb2-clock-sel: Add reset_control This hardware needs to deassert resets of both host and peripheral. So, this patch adds reset control. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Link: https://lore.kernel.org/r/1583304137-28482-5-git-send-email-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2020-03-04 15:42:17 +09:00
ret = reset_control_deassert(priv->rsts);
clk: renesas: rcar-usb2-clock-sel: Add multiple clocks management This hardware needs to enable clocks of both host and peripheral. So, this patch adds multiple clocks management. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Link: https://lore.kernel.org/r/1583304137-28482-4-git-send-email-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2020-03-04 15:42:16 +09:00
if (ret)
return ret;
clk: renesas: rcar-usb2-clock-sel: Add reset_control This hardware needs to deassert resets of both host and peripheral. So, this patch adds reset control. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Link: https://lore.kernel.org/r/1583304137-28482-5-git-send-email-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2020-03-04 15:42:17 +09:00
ret = clk_bulk_prepare_enable(ARRAY_SIZE(priv->clks), priv->clks);
if (ret) {
reset_control_assert(priv->rsts);
return ret;
}
clk: renesas: rcar-usb2-clock-sel: Add multiple clocks management This hardware needs to enable clocks of both host and peripheral. So, this patch adds multiple clocks management. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Link: https://lore.kernel.org/r/1583304137-28482-4-git-send-email-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2020-03-04 15:42:16 +09:00
usb2_clock_sel_enable_extal_only(priv);
clk: renesas: rcar-usb2-clock-sel: Add R-Car USB 2.0 clock selector PHY R-Car USB 2.0 controller can change the clock source from an oscillator to an external clock via a register. So, this patch adds support the clock source selector as a clock driver. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2017-07-25 15:26:27 +09:00
return 0;
}
static void usb2_clock_sel_disable(struct clk_hw *hw)
{
clk: renesas: rcar-usb2-clock-sel: Add multiple clocks management This hardware needs to enable clocks of both host and peripheral. So, this patch adds multiple clocks management. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Link: https://lore.kernel.org/r/1583304137-28482-4-git-send-email-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2020-03-04 15:42:16 +09:00
struct usb2_clock_sel_priv *priv = to_priv(hw);
usb2_clock_sel_disable_extal_only(priv);
clk_bulk_disable_unprepare(ARRAY_SIZE(priv->clks), priv->clks);
clk: renesas: rcar-usb2-clock-sel: Add reset_control This hardware needs to deassert resets of both host and peripheral. So, this patch adds reset control. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Link: https://lore.kernel.org/r/1583304137-28482-5-git-send-email-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2020-03-04 15:42:17 +09:00
reset_control_assert(priv->rsts);
clk: renesas: rcar-usb2-clock-sel: Add R-Car USB 2.0 clock selector PHY R-Car USB 2.0 controller can change the clock source from an oscillator to an external clock via a register. So, this patch adds support the clock source selector as a clock driver. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2017-07-25 15:26:27 +09:00
}
/*
* This module seems a mux, but this driver assumes a gate because
* ehci/ohci platform drivers don't support clk_set_parent() for now.
* If this driver acts as a gate, ehci/ohci-platform drivers don't need
* any modification.
*/
static const struct clk_ops usb2_clock_sel_clock_ops = {
.enable = usb2_clock_sel_enable,
.disable = usb2_clock_sel_disable,
};
static const struct of_device_id rcar_usb2_clock_sel_match[] = {
{ .compatible = "renesas,rcar-gen3-usb2-clock-sel" },
{ }
};
static int rcar_usb2_clock_sel_suspend(struct device *dev)
{
struct usb2_clock_sel_priv *priv = dev_get_drvdata(dev);
usb2_clock_sel_disable_extal_only(priv);
pm_runtime_put(dev);
return 0;
}
static int rcar_usb2_clock_sel_resume(struct device *dev)
{
struct usb2_clock_sel_priv *priv = dev_get_drvdata(dev);
pm_runtime_get_sync(dev);
usb2_clock_sel_enable_extal_only(priv);
return 0;
}
static int rcar_usb2_clock_sel_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
of_clk_del_provider(dev->of_node);
pm_runtime_put(dev);
pm_runtime_disable(dev);
return 0;
}
static int rcar_usb2_clock_sel_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct usb2_clock_sel_priv *priv;
struct clk *clk;
clk: renesas: Zero init clk_init_data As clk_core_populate_parent_map() checks clk_init_data.num_parents first, and checks clk_init_data.parent_names[] before clk_init_data.parent_data[] and clk_init_data.parent_hws[], leaving the latter uninitialized doesn't do harm for now. However, it is better to play it safe, and initialize all clk_init_data structures to zeroes, to avoid any current and future members containing uninitialized data. Remove a few explicit zero initializers, which are now superfluous. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Stephen Boyd <sboyd@kernel.org> Link: https://lore.kernel.org/r/20210326105434.1574796-1-geert+renesas@glider.be
2021-03-26 11:54:34 +01:00
struct clk_init_data init = {};
clk: renesas: rcar-usb2-clock-sel: Add multiple clocks management This hardware needs to enable clocks of both host and peripheral. So, this patch adds multiple clocks management. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Link: https://lore.kernel.org/r/1583304137-28482-4-git-send-email-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2020-03-04 15:42:16 +09:00
int ret;
clk: renesas: rcar-usb2-clock-sel: Add R-Car USB 2.0 clock selector PHY R-Car USB 2.0 controller can change the clock source from an oscillator to an external clock via a register. So, this patch adds support the clock source selector as a clock driver. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2017-07-25 15:26:27 +09:00
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
clk: renesas: rcar-usb2-clock-sel: Use devm_platform_ioremap_resource() helper Use the devm_platform_ioremap_resource() helper instead of open-coding the same operation. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
2019-08-07 09:14:16 +02:00
priv->base = devm_platform_ioremap_resource(pdev, 0);
clk: renesas: rcar-usb2-clock-sel: Add R-Car USB 2.0 clock selector PHY R-Car USB 2.0 controller can change the clock source from an oscillator to an external clock via a register. So, this patch adds support the clock source selector as a clock driver. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2017-07-25 15:26:27 +09:00
if (IS_ERR(priv->base))
return PTR_ERR(priv->base);
clk: renesas: rcar-usb2-clock-sel: Add multiple clocks management This hardware needs to enable clocks of both host and peripheral. So, this patch adds multiple clocks management. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Link: https://lore.kernel.org/r/1583304137-28482-4-git-send-email-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2020-03-04 15:42:16 +09:00
memcpy(priv->clks, rcar_usb2_clocks, sizeof(priv->clks));
ret = devm_clk_bulk_get(dev, ARRAY_SIZE(priv->clks), priv->clks);
if (ret < 0)
return ret;
clk: renesas: rcar-usb2-clock-sel: Replace devm_reset_control_array_get() devm_reset_control_array_get_shared() looks more readable Signed-off-by: Yejune Deng <yejune.deng@gmail.com> Link: https://lore.kernel.org/r/1604375093-6451-1-git-send-email-yejune.deng@gmail.com Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2020-11-03 11:44:53 +08:00
priv->rsts = devm_reset_control_array_get_shared(dev);
clk: renesas: rcar-usb2-clock-sel: Add reset_control This hardware needs to deassert resets of both host and peripheral. So, this patch adds reset control. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Link: https://lore.kernel.org/r/1583304137-28482-5-git-send-email-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2020-03-04 15:42:17 +09:00
if (IS_ERR(priv->rsts))
return PTR_ERR(priv->rsts);
clk: renesas: rcar-usb2-clock-sel: Add R-Car USB 2.0 clock selector PHY R-Car USB 2.0 controller can change the clock source from an oscillator to an external clock via a register. So, this patch adds support the clock source selector as a clock driver. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2017-07-25 15:26:27 +09:00
clk = devm_clk_get(dev, "usb_extal");
if (!IS_ERR(clk) && !clk_prepare_enable(clk)) {
priv->extal = !!clk_get_rate(clk);
clk_disable_unprepare(clk);
}
clk = devm_clk_get(dev, "usb_xtal");
if (!IS_ERR(clk) && !clk_prepare_enable(clk)) {
priv->xtal = !!clk_get_rate(clk);
clk_disable_unprepare(clk);
}
if (!priv->extal && !priv->xtal) {
dev_err(dev, "This driver needs usb_extal or usb_xtal\n");
return -ENOENT;
}
clk: renesas: rcar-usb2-clock-sel: Fix error handling in .probe() The error handling paths after pm_runtime_get_sync() have no refcount decrement, which leads to refcount leak. Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn> Link: https://lore.kernel.org/r/20210415073338.22287-1-dinghao.liu@zju.edu.cn [geert: Remove now unused variable priv] Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2021-04-15 15:33:38 +08:00
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
clk: renesas: rcar-usb2-clock-sel: Add R-Car USB 2.0 clock selector PHY R-Car USB 2.0 controller can change the clock source from an oscillator to an external clock via a register. So, this patch adds support the clock source selector as a clock driver. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2017-07-25 15:26:27 +09:00
platform_set_drvdata(pdev, priv);
dev_set_drvdata(dev, priv);
init.name = "rcar_usb2_clock_sel";
init.ops = &usb2_clock_sel_clock_ops;
priv->hw.init = &init;
clk: renesas: rcar-usb2-clock-sel: Fix kernel NULL pointer dereference The probe was manually passing NULL instead of dev to devm_clk_hw_register. This caused a Unable to handle kernel NULL pointer dereference error. Fix this by passing 'dev'. Signed-off-by: Adam Ford <aford173@gmail.com> Fixes: a20a40a8bbc2 ("clk: renesas: rcar-usb2-clock-sel: Fix error handling in .probe()") Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2021-08-26 09:17:21 -05:00
ret = devm_clk_hw_register(dev, &priv->hw);
clk: renesas: rcar-usb2-clock-sel: Fix error handling in .probe() The error handling paths after pm_runtime_get_sync() have no refcount decrement, which leads to refcount leak. Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn> Link: https://lore.kernel.org/r/20210415073338.22287-1-dinghao.liu@zju.edu.cn [geert: Remove now unused variable priv] Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2021-04-15 15:33:38 +08:00
if (ret)
goto pm_put;
ret = of_clk_add_hw_provider(np, of_clk_hw_simple_get, &priv->hw);
if (ret)
goto pm_put;
return 0;
clk: renesas: rcar-usb2-clock-sel: Add R-Car USB 2.0 clock selector PHY R-Car USB 2.0 controller can change the clock source from an oscillator to an external clock via a register. So, this patch adds support the clock source selector as a clock driver. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2017-07-25 15:26:27 +09:00
clk: renesas: rcar-usb2-clock-sel: Fix error handling in .probe() The error handling paths after pm_runtime_get_sync() have no refcount decrement, which leads to refcount leak. Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn> Link: https://lore.kernel.org/r/20210415073338.22287-1-dinghao.liu@zju.edu.cn [geert: Remove now unused variable priv] Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2021-04-15 15:33:38 +08:00
pm_put:
pm_runtime_put(dev);
pm_runtime_disable(dev);
return ret;
clk: renesas: rcar-usb2-clock-sel: Add R-Car USB 2.0 clock selector PHY R-Car USB 2.0 controller can change the clock source from an oscillator to an external clock via a register. So, this patch adds support the clock source selector as a clock driver. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2017-07-25 15:26:27 +09:00
}
static const struct dev_pm_ops rcar_usb2_clock_sel_pm_ops = {
.suspend = rcar_usb2_clock_sel_suspend,
.resume = rcar_usb2_clock_sel_resume,
};
static struct platform_driver rcar_usb2_clock_sel_driver = {
.driver = {
.name = "rcar-usb2-clock-sel",
.of_match_table = rcar_usb2_clock_sel_match,
.pm = &rcar_usb2_clock_sel_pm_ops,
},
.probe = rcar_usb2_clock_sel_probe,
.remove = rcar_usb2_clock_sel_remove,
};
builtin_platform_driver(rcar_usb2_clock_sel_driver);
MODULE_DESCRIPTION("Renesas R-Car USB2 clock selector Driver");
MODULE_LICENSE("GPL v2");
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