static void stop_oxnas_usb_ehci(struct oxnas_hcd *oxnas)
{
reset_control_assert(oxnas->rst_host);
reset_control_assert(oxnas->rst_phya);
reset_control_assert(oxnas->rst_phyb);
if (oxnas->use_pllb) {
clk_disable_unprepare(oxnas->phyref);
clk_disable_unprepare(oxnas->refsrc);
}
clk_disable_unprepare(oxnas->clk);
}
static void histb_pcie_host_disable(struct histb_pcie *hipcie)
{
reset_control_assert(hipcie->soft_reset);
reset_control_assert(hipcie->sys_reset);
reset_control_assert(hipcie->bus_reset);
clk_disable_unprepare(hipcie->aux_clk);
clk_disable_unprepare(hipcie->pipe_clk);
clk_disable_unprepare(hipcie->sys_clk);
clk_disable_unprepare(hipcie->bus_clk);
if (gpio_is_valid(hipcie->reset_gpio))
gpio_set_value_cansleep(hipcie->reset_gpio, 0);
}
static int st_ehci_platform_power_on(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct st_ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
int clk, ret;
ret = reset_control_deassert(priv->pwr);
if (ret)
return ret;
ret = reset_control_deassert(priv->rst);
if (ret)
goto err_assert_power;
/* some SoCs don't have a dedicated 48Mhz clock, but those that do
need the rate to be explicitly set */
if (priv->clk48) {
ret = clk_set_rate(priv->clk48, 48000000);
if (ret)
goto err_assert_reset;
}
for (clk = 0; clk < USB_MAX_CLKS && priv->clks[clk]; clk++) {
ret = clk_prepare_enable(priv->clks[clk]);
if (ret)
goto err_disable_clks;
}
ret = phy_init(priv->phy);
if (ret)
goto err_disable_clks;
ret = phy_power_on(priv->phy);
if (ret)
goto err_exit_phy;
return 0;
err_exit_phy:
phy_exit(priv->phy);
err_disable_clks:
while (--clk >= 0)
clk_disable_unprepare(priv->clks[clk]);
err_assert_reset:
reset_control_assert(priv->rst);
err_assert_power:
reset_control_assert(priv->pwr);
return ret;
}
static void tegra_ahci_power_off(struct ahci_host_priv *hpriv)
{
struct tegra_ahci_priv *tegra = hpriv->plat_data;
ahci_platform_disable_resources(hpriv);
reset_control_assert(tegra->sata_rst);
reset_control_assert(tegra->sata_oob_rst);
reset_control_assert(tegra->sata_cold_rst);
clk_disable_unprepare(tegra->sata_clk);
tegra_powergate_power_off(TEGRA_POWERGATE_SATA);
regulator_bulk_disable(ARRAY_SIZE(tegra->supplies), tegra->supplies);
}
static int ehci_platform_remove(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
int clk;
usb_remove_hcd(hcd);
if (pdata->power_off)
pdata->power_off(dev);
if (priv->rst)
reset_control_assert(priv->rst);
for (clk = 0; clk < EHCI_MAX_CLKS && priv->clks[clk]; clk++)
clk_put(priv->clks[clk]);
usb_put_hcd(hcd);
if (pdata == &ehci_platform_defaults)
dev->dev.platform_data = NULL;
return 0;
}
/* Must be called with clk disabled, and returns with clk enabled */
int tegra_powergate_sequence_power_up(int id, struct clk *clk,
struct reset_control *rst)
{
int ret;
reset_control_assert(rst);
ret = tegra_powergate_power_on(id);
if (ret)
goto err_power;
ret = clk_prepare_enable(clk);
if (ret)
goto err_clk;
udelay(10);
ret = tegra_powergate_remove_clamping(id);
if (ret)
goto err_clamp;
udelay(10);
reset_control_deassert(rst);
return 0;
err_clamp:
clk_disable_unprepare(clk);
err_clk:
tegra_powergate_power_off(id);
err_power:
return ret;
}
static int dwc3_core_init_for_resume(struct dwc3 *dwc)
{
int ret;
ret = reset_control_deassert(dwc->reset);
if (ret)
return ret;
ret = clk_bulk_prepare(dwc->num_clks, dwc->clks);
if (ret)
goto assert_reset;
ret = clk_bulk_enable(dwc->num_clks, dwc->clks);
if (ret)
goto unprepare_clks;
ret = dwc3_core_init(dwc);
if (ret)
goto disable_clks;
return 0;
disable_clks:
clk_bulk_disable(dwc->num_clks, dwc->clks);
unprepare_clks:
clk_bulk_unprepare(dwc->num_clks, dwc->clks);
assert_reset:
reset_control_assert(dwc->reset);
return ret;
}
static int _alt_hps2fpga_enable_set(struct altera_hps2fpga_data *priv,
bool enable)
{
unsigned long flags;
int ret;
/* bring bridge out of reset */
if (enable)
ret = reset_control_deassert(priv->bridge_reset);
else
ret = reset_control_assert(priv->bridge_reset);
if (ret)
return ret;
/* Allow bridge to be visible to L3 masters or not */
if (priv->remap_mask) {
spin_lock_irqsave(&l3_remap_lock, flags);
l3_remap_shadow |= ALT_L3_REMAP_MPUZERO_MSK;
if (enable)
l3_remap_shadow |= priv->remap_mask;
else
l3_remap_shadow &= ~priv->remap_mask;
ret = regmap_write(priv->l3reg, ALT_L3_REMAP_OFST,
l3_remap_shadow);
spin_unlock_irqrestore(&l3_remap_lock, flags);
}
return ret;
}
static int dwc3_of_simple_remove(struct platform_device *pdev)
{
struct dwc3_of_simple *simple = platform_get_drvdata(pdev);
struct device *dev = &pdev->dev;
int i;
of_platform_depopulate(dev);
for (i = 0; i < simple->num_clocks; i++) {
clk_disable_unprepare(simple->clks[i]);
clk_put(simple->clks[i]);
}
simple->num_clocks = 0;
if (!simple->pulse_resets)
reset_control_assert(simple->resets);
reset_control_put(simple->resets);
pm_runtime_disable(dev);
pm_runtime_put_noidle(dev);
pm_runtime_set_suspended(dev);
return 0;
}
static void img_i2s_out_reset(struct img_i2s_out *i2s)
{
int i;
u32 core_ctl, chan_ctl;
core_ctl = img_i2s_out_readl(i2s, IMG_I2S_OUT_CTL) &
~IMG_I2S_OUT_CTL_ME_MASK &
~IMG_I2S_OUT_CTL_DATA_EN_MASK;
if (!i2s->force_clk_active)
core_ctl &= ~IMG_I2S_OUT_CTL_CLK_EN_MASK;
chan_ctl = img_i2s_out_ch_readl(i2s, 0, IMG_I2S_OUT_CH_CTL) &
~IMG_I2S_OUT_CHAN_CTL_ME_MASK;
reset_control_assert(i2s->rst);
reset_control_deassert(i2s->rst);
for (i = 0; i < i2s->max_i2s_chan; i++)
img_i2s_out_ch_writel(i2s, i, chan_ctl, IMG_I2S_OUT_CH_CTL);
for (i = 0; i < i2s->active_channels; i++)
img_i2s_out_ch_enable(i2s, i);
img_i2s_out_writel(i2s, core_ctl, IMG_I2S_OUT_CTL);
img_i2s_out_enable(i2s);
}
static void i2c_dw_prepare_recovery(struct i2c_adapter *adap)
{
struct dw_i2c_dev *dev = i2c_get_adapdata(adap);
i2c_dw_disable(dev);
reset_control_assert(dev->rst);
i2c_dw_prepare_clk(dev, false);
}
static int rockchip_dp_pre_init(struct rockchip_dp_device *dp)
{
reset_control_assert(dp->rst);
usleep_range(10, 20);
reset_control_deassert(dp->rst);
return 0;
}
static int socfpga_dwmac_set_phy_mode(struct socfpga_dwmac *dwmac)
{
struct regmap *sys_mgr_base_addr = dwmac->sys_mgr_base_addr;
int phymode = dwmac->interface;
u32 reg_offset = dwmac->reg_offset;
u32 reg_shift = dwmac->reg_shift;
u32 ctrl, val, module;
switch (phymode) {
case PHY_INTERFACE_MODE_RGMII:
case PHY_INTERFACE_MODE_RGMII_ID:
val = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RGMII;
break;
case PHY_INTERFACE_MODE_MII:
case PHY_INTERFACE_MODE_GMII:
val = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII;
break;
default:
dev_err(dwmac->dev, "bad phy mode %d\n", phymode);
return -EINVAL;
}
/* Overwrite val to GMII if splitter core is enabled. The phymode here
* is the actual phy mode on phy hardware, but phy interface from
* EMAC core is GMII.
*/
if (dwmac->splitter_base)
val = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII;
/* Assert reset to the enet controller before changing the phy mode */
if (dwmac->stmmac_rst)
reset_control_assert(dwmac->stmmac_rst);
regmap_read(sys_mgr_base_addr, reg_offset, &ctrl);
ctrl &= ~(SYSMGR_EMACGRP_CTRL_PHYSEL_MASK << reg_shift);
ctrl |= val << reg_shift;
if (dwmac->f2h_ptp_ref_clk) {
ctrl |= SYSMGR_EMACGRP_CTRL_PTP_REF_CLK_MASK << (reg_shift / 2);
regmap_read(sys_mgr_base_addr, SYSMGR_FPGAGRP_MODULE_REG,
&module);
module |= (SYSMGR_FPGAGRP_MODULE_EMAC << (reg_shift / 2));
regmap_write(sys_mgr_base_addr, SYSMGR_FPGAGRP_MODULE_REG,
module);
} else {
ctrl &= ~(SYSMGR_EMACGRP_CTRL_PTP_REF_CLK_MASK << (reg_shift / 2));
}
regmap_write(sys_mgr_base_addr, reg_offset, ctrl);
/* Deassert reset for the phy configuration to be sampled by
* the enet controller, and operation to start in requested mode
*/
if (dwmac->stmmac_rst)
reset_control_deassert(dwmac->stmmac_rst);
return 0;
}
static void sun6i_drc_unbind(struct device *dev, struct device *master,
void *data)
{
struct sun6i_drc *drc = dev_get_drvdata(dev);
clk_disable_unprepare(drc->mod_clk);
clk_disable_unprepare(drc->bus_clk);
reset_control_assert(drc->reset);
}
/**
* dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the
* DWC_otg driver
*
* @dev: Platform device
*
* This routine is called, for example, when the rmmod command is executed. The
* device may or may not be electrically present. If it is present, the driver
* stops device processing. Any resources used on behalf of this device are
* freed.
*/
static int dwc2_driver_remove(struct platform_device *dev)
{
struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);
dwc2_debugfs_exit(hsotg);
if (hsotg->hcd_enabled)
dwc2_hcd_remove(hsotg);
if (hsotg->gadget_enabled)
dwc2_hsotg_remove(hsotg);
if (hsotg->ll_hw_enabled)
dwc2_lowlevel_hw_disable(hsotg);
reset_control_assert(hsotg->reset);
reset_control_assert(hsotg->reset_ecc);
return 0;
}
static void xhci_histb_host_disable(struct xhci_hcd_histb *histb)
{
reset_control_assert(histb->soft_reset);
clk_disable_unprepare(histb->suspend_clk);
clk_disable_unprepare(histb->pipe_clk);
clk_disable_unprepare(histb->utmi_clk);
clk_disable_unprepare(histb->bus_clk);
}
static int dwc3_of_simple_suspend(struct device *dev)
{
struct dwc3_of_simple *simple = dev_get_drvdata(dev);
if (simple->need_reset)
reset_control_assert(simple->resets);
return 0;
}
static int p2wi_remove(struct platform_device *dev)
{
struct p2wi *p2wi = platform_get_drvdata(dev);
reset_control_assert(p2wi->rstc);
clk_disable_unprepare(p2wi->clk);
i2c_del_adapter(&p2wi->adapter);
return 0;
}
static void socfpga_dwmac_exit(struct platform_device *pdev, void *priv)
{
struct socfpga_dwmac *dwmac = priv;
/* On socfpga platform exit, assert and hold reset to the
* enet controller - the default state after a hard reset.
*/
if (dwmac->stmmac_rst)
reset_control_assert(dwmac->stmmac_rst);
}
static void st_ehci_platform_power_off(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct st_ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
int clk;
reset_control_assert(priv->pwr);
reset_control_assert(priv->rst);
phy_power_off(priv->phy);
phy_exit(priv->phy);
for (clk = USB_MAX_CLKS - 1; clk >= 0; clk--)
if (priv->clks[clk])
clk_disable_unprepare(priv->clks[clk]);
}
static int dw_wdt_drv_remove(struct platform_device *pdev)
{
struct dw_wdt *dw_wdt = platform_get_drvdata(pdev);
watchdog_unregister_device(&dw_wdt->wdd);
reset_control_assert(dw_wdt->rst);
clk_disable_unprepare(dw_wdt->clk);
return 0;
}
static int uniphier_pciephy_exit(struct phy *phy)
{
struct uniphier_pciephy_priv *priv = phy_get_drvdata(phy);
uniphier_pciephy_assert(priv);
reset_control_assert(priv->rst);
clk_disable_unprepare(priv->clk);
return 0;
}
static void sun8i_mixer_unbind(struct device *dev, struct device *master,
void *data)
{
struct sun8i_mixer *mixer = dev_get_drvdata(dev);
list_del(&mixer->engine.list);
clk_disable_unprepare(mixer->mod_clk);
clk_disable_unprepare(mixer->bus_clk);
reset_control_assert(mixer->reset);
}
static int sun6i_spi_runtime_suspend(struct device *dev)
{
struct spi_master *master = dev_get_drvdata(dev);
struct sun6i_spi *sspi = spi_master_get_devdata(master);
reset_control_assert(sspi->rstc);
clk_disable_unprepare(sspi->mclk);
clk_disable_unprepare(sspi->hclk);
return 0;
}
static int dw_apb_raw_uart_remove(struct platform_device *pdev)
{
reset_control_assert(dw_apb_port->rst);
if (!IS_ERR(dw_apb_port->pclk))
clk_disable_unprepare(dw_apb_port->pclk);
clk_disable_unprepare(dw_apb_port->sclk);
kfree(dw_apb_port);
return 0;
}
static int st_rproc_stop(struct rproc *rproc)
{
struct st_rproc *ddata = rproc->priv;
int sw_err = 0, pwr_err = 0;
if (ddata->config->sw_reset) {
sw_err = reset_control_assert(ddata->sw_reset);
if (sw_err)
dev_err(&rproc->dev, "Failed to assert S/W Reset\n");
}
if (ddata->config->pwr_reset) {
pwr_err = reset_control_assert(ddata->pwr_reset);
if (pwr_err)
dev_err(&rproc->dev, "Failed to assert Power Reset\n");
}
clk_disable(ddata->clk);
return sw_err ?: pwr_err;
}
static int
nvkm_device_tegra_power_down(struct nvkm_device_tegra *tdev)
{
reset_control_assert(tdev->rst);
udelay(10);
clk_disable_unprepare(tdev->clk_pwr);
clk_disable_unprepare(tdev->clk);
udelay(10);
return regulator_disable(tdev->vdd);
}
/*
* Release a line
*/
static int of_platform_serial_remove(struct platform_device *ofdev)
{
struct of_serial_info *info = platform_get_drvdata(ofdev);
serial8250_unregister_port(info->line);
reset_control_assert(info->rst);
if (info->clk)
clk_disable_unprepare(info->clk);
kfree(info);
return 0;
}
static int
nvkm_device_tegra_power_up(struct nvkm_device_tegra *tdev)
{
int ret;
if (tdev->vdd) {
ret = regulator_enable(tdev->vdd);
if (ret)
goto err_power;
}
ret = clk_prepare_enable(tdev->clk);
if (ret)
goto err_clk;
if (tdev->clk_ref) {
ret = clk_prepare_enable(tdev->clk_ref);
if (ret)
goto err_clk_ref;
}
ret = clk_prepare_enable(tdev->clk_pwr);
if (ret)
goto err_clk_pwr;
clk_set_rate(tdev->clk_pwr, 204000000);
udelay(10);
reset_control_assert(tdev->rst);
udelay(10);
if (!tdev->pdev->dev.pm_domain) {
ret = tegra_powergate_remove_clamping(TEGRA_POWERGATE_3D);
if (ret)
goto err_clamp;
udelay(10);
}
reset_control_deassert(tdev->rst);
udelay(10);
return 0;
err_clamp:
clk_disable_unprepare(tdev->clk_pwr);
err_clk_pwr:
if (tdev->clk_ref)
clk_disable_unprepare(tdev->clk_ref);
err_clk_ref:
clk_disable_unprepare(tdev->clk);
err_clk:
if (tdev->vdd)
regulator_disable(tdev->vdd);
err_power:
return ret;
}
void clk_disable_usb_gxbaby(struct platform_device *pdev,
const char *s_clock_name,
unsigned long usb_peri_reg)
{
struct reset_control *usb_reset;
if (0 == pdev->id) {
usb_reset = p_clk_reset[pdev->id].usb_reset_usb_general;
reset_control_assert(usb_reset);
usb_reset = p_clk_reset[pdev->id].usb_reset_usb;
reset_control_assert(usb_reset);
usb_reset = p_clk_reset[pdev->id].usb_reset_usb_to_ddr;
reset_control_assert(usb_reset);
} else if (1 == pdev->id) {
usb_reset = p_clk_reset[pdev->id].usb_reset_usb_general;
reset_control_assert(usb_reset);
usb_reset = p_clk_reset[pdev->id].usb_reset_usb;
reset_control_assert(usb_reset);
usb_reset = p_clk_reset[pdev->id].usb_reset_usb_to_ddr;
reset_control_assert(usb_reset);
} else {
dev_err(&pdev->dev, "bad usb clk name.\n");
return;
}
return;
}
