mirror of https://gitee.com/openkylin/linux.git
clock management changes for i.MX
Another simple series related to clock management, this time only for imx. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIVAwUATwta7GCrR//JCVInAQJD6A//ZbZtOEctF1nfrpQ6LeoPdJFWUt/4d+GX JW2CksR94AB1BqTNV0N0a/pRUNTEo5bBVzeXJw8XnJSCNnIakJpFoeZBh93YTOsO ZfuxhYwkVrbCusELaltrSdj5lUW/KgE58vTpfCkkqGgyMQQTzH73zJyjNOYAaWAK FleQ5jCpxm3FqoA5jp9+7xcHwF+o2btKXzM4kyEO/cAaypEIOz83qAK16FKzIvuI ba9QgMXN5sAKwNMIkNYJruHknlshGT00NBlYJebT0MXbd7pyuN9VsIfMMEQ+VG8B 3hvfVvHrVeHiWoqdF0r8uxr/SZJiCZlE5RhDK1pO1MXPsroaOEAMSAeA/Y2193HK Dkz37iBBUf5T4mA5GfKb7dH4maM79OQ+SEtcQySF18hT+qCHeJV3J8WC0c7C81Ej 7RFBJjFfpwKwd/SXFKn/PYmlgJZ4aW1+FNyx5xnIjBNpnU8N9knw2h1qGVvcjp+V SRQ7zghQToDY425U0ziiFle3XsrC/a0QZrzbFo+rqgUXMZQ2Vq7CiZr/E8QNsbiE I0AVE6hlWEx3aXgDoHKb0K3kSthIT7QkmO2UjhJmplEIjgVZw+vfjmAM9O+AeWJC BYLzgl2CRAZekNBD77aUdB1VUVz2cUUQ2zgh0wH11k2ca2+h3Lyw4buzsV4u3nxj Fqinw2GEt2U= =czKE -----END PGP SIGNATURE----- Merge tag 'clk' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc clock management changes for i.MX Another simple series related to clock management, this time only for imx. * tag 'clk' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: ARM: mxs: select HAVE_CLK_PREPARE for clock clk: add config option HAVE_CLK_PREPARE into Kconfig ASoC: mxs-saif: convert to clk_prepare/clk_unprepare video: mxsfb: convert to clk_prepare/clk_unprepare serial: mxs-auart: convert to clk_prepare/clk_unprepare net: flexcan: convert to clk_prepare/clk_unprepare mtd: gpmi-lib: convert to clk_prepare/clk_unprepare mmc: mxs-mmc: convert to clk_prepare/clk_unprepare dma: mxs-dma: convert to clk_prepare/clk_unprepare net: fec: add clk_prepare/clk_unprepare ARM: mxs: convert platform code to clk_prepare/clk_unprepare clk: add helper functions clk_prepare_enable and clk_disable_unprepare Fix up trivial conflicts in drivers/net/ethernet/freescale/fec.c due to commit0ebafefcaa("net: fec: add clk_prepare/clk_unprepare") clashing trivially with commite163cc97f9("net/fec: fix the .remove code").
This commit is contained in:
Linus Torvalds
commit
979ecef5b8
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@ -447,6 +447,7 @@ config ARCH_MXS
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select ARCH_REQUIRE_GPIOLIB
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select CLKDEV_LOOKUP
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select CLKSRC_MMIO
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select HAVE_CLK_PREPARE
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help
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Support for Freescale MXS-based family of processors
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@ -545,11 +545,11 @@ int __init mx23_clocks_init(void)
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*/
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clk_set_parent(&ssp_clk, &ref_io_clk);
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clk_enable(&cpu_clk);
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clk_enable(&hbus_clk);
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clk_enable(&xbus_clk);
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clk_enable(&emi_clk);
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clk_enable(&uart_clk);
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clk_prepare_enable(&cpu_clk);
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clk_prepare_enable(&hbus_clk);
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clk_prepare_enable(&xbus_clk);
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clk_prepare_enable(&emi_clk);
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clk_prepare_enable(&uart_clk);
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clkdev_add_table(lookups, ARRAY_SIZE(lookups));
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@ -804,11 +804,11 @@ int __init mx28_clocks_init(void)
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clk_set_parent(&ssp0_clk, &ref_io0_clk);
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clk_set_parent(&ssp1_clk, &ref_io0_clk);
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clk_enable(&cpu_clk);
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clk_enable(&hbus_clk);
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clk_enable(&xbus_clk);
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clk_enable(&emi_clk);
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clk_enable(&uart_clk);
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clk_prepare_enable(&cpu_clk);
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clk_prepare_enable(&hbus_clk);
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clk_prepare_enable(&xbus_clk);
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clk_prepare_enable(&emi_clk);
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clk_prepare_enable(&uart_clk);
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clk_set_parent(&lcdif_clk, &ref_pix_clk);
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clk_set_parent(&saif0_clk, &pll0_clk);
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@ -74,10 +74,15 @@ static int __clk_enable(struct clk *clk)
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return 0;
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}
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/* This function increments the reference count on the clock and enables the
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* clock if not already enabled. The parent clock tree is recursively enabled
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/*
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* The clk_enable/clk_disable could be called by drivers in atomic context,
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* so they should not really hold mutex. Instead, clk_prepare/clk_unprepare
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* can hold a mutex, as the pair will only be called in non-atomic context.
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* Before migrating to common clk framework, we can have __clk_enable and
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* __clk_disable called in clk_prepare/clk_unprepare with mutex held and
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* leave clk_enable/clk_disable as the dummy functions.
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*/
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int clk_enable(struct clk *clk)
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int clk_prepare(struct clk *clk)
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{
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int ret = 0;
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@ -90,13 +95,9 @@ int clk_enable(struct clk *clk)
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return ret;
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}
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EXPORT_SYMBOL(clk_enable);
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EXPORT_SYMBOL(clk_prepare);
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/* This function decrements the reference count on the clock and disables
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* the clock when reference count is 0. The parent clock tree is
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* recursively disabled
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*/
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void clk_disable(struct clk *clk)
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void clk_unprepare(struct clk *clk)
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{
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if (clk == NULL || IS_ERR(clk))
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return;
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@ -105,6 +106,18 @@ void clk_disable(struct clk *clk)
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__clk_disable(clk);
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mutex_unlock(&clocks_mutex);
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}
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EXPORT_SYMBOL(clk_unprepare);
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int clk_enable(struct clk *clk)
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{
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return 0;
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}
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EXPORT_SYMBOL(clk_enable);
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void clk_disable(struct clk *clk)
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{
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/* nothing to do */
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}
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EXPORT_SYMBOL(clk_disable);
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/* Retrieve the *current* clock rate. If the clock itself
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@ -166,7 +179,7 @@ int clk_set_parent(struct clk *clk, struct clk *parent)
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return ret;
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if (clk->usecount)
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clk_enable(parent);
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clk_prepare_enable(parent);
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mutex_lock(&clocks_mutex);
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ret = clk->set_parent(clk, parent);
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@ -229,7 +229,7 @@ static void __init mx28evk_fec_reset(void)
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/* Enable fec phy clock */
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clk = clk_get_sys("pll2", NULL);
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if (!IS_ERR(clk))
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clk_enable(clk);
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clk_prepare_enable(clk);
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/* Power up fec phy */
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ret = gpio_request(MX28EVK_FEC_PHY_POWER, "fec-phy-power");
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@ -66,7 +66,7 @@ static int __init mxs_arch_reset_init(void)
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clk = clk_get_sys("rtc", NULL);
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if (!IS_ERR(clk))
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clk_enable(clk);
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clk_prepare_enable(clk);
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return 0;
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}
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@ -245,7 +245,7 @@ static int __init mxs_clocksource_init(struct clk *timer_clk)
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void __init mxs_timer_init(struct clk *timer_clk, int irq)
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{
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clk_enable(timer_clk);
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clk_prepare_enable(timer_clk);
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/*
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* Initialize timers to a known state
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@ -3,5 +3,8 @@ config CLKDEV_LOOKUP
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bool
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select HAVE_CLK
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config HAVE_CLK_PREPARE
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bool
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config HAVE_MACH_CLKDEV
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bool
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@ -334,7 +334,7 @@ static int mxs_dma_alloc_chan_resources(struct dma_chan *chan)
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goto err_irq;
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}
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ret = clk_enable(mxs_dma->clk);
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ret = clk_prepare_enable(mxs_dma->clk);
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if (ret)
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goto err_clk;
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@ -372,7 +372,7 @@ static void mxs_dma_free_chan_resources(struct dma_chan *chan)
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dma_free_coherent(mxs_dma->dma_device.dev, PAGE_SIZE,
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mxs_chan->ccw, mxs_chan->ccw_phys);
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clk_disable(mxs_dma->clk);
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clk_disable_unprepare(mxs_dma->clk);
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}
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static struct dma_async_tx_descriptor *mxs_dma_prep_slave_sg(
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@ -578,7 +578,7 @@ static int __init mxs_dma_init(struct mxs_dma_engine *mxs_dma)
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{
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int ret;
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ret = clk_enable(mxs_dma->clk);
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ret = clk_prepare_enable(mxs_dma->clk);
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if (ret)
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goto err_out;
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@ -604,7 +604,7 @@ static int __init mxs_dma_init(struct mxs_dma_engine *mxs_dma)
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writel(MXS_DMA_CHANNELS_MASK << MXS_DMA_CHANNELS,
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mxs_dma->base + HW_APBHX_CTRL1 + MXS_SET_ADDR);
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clk_disable(mxs_dma->clk);
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clk_disable_unprepare(mxs_dma->clk);
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return 0;
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@ -713,7 +713,7 @@ static int mxs_mmc_probe(struct platform_device *pdev)
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ret = PTR_ERR(host->clk);
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goto out_iounmap;
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}
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clk_enable(host->clk);
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clk_prepare_enable(host->clk);
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mxs_mmc_reset(host);
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@ -772,7 +772,7 @@ static int mxs_mmc_probe(struct platform_device *pdev)
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if (host->dmach)
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dma_release_channel(host->dmach);
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out_clk_put:
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clk_disable(host->clk);
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clk_disable_unprepare(host->clk);
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clk_put(host->clk);
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out_iounmap:
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iounmap(host->base);
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@ -798,7 +798,7 @@ static int mxs_mmc_remove(struct platform_device *pdev)
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if (host->dmach)
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dma_release_channel(host->dmach);
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clk_disable(host->clk);
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clk_disable_unprepare(host->clk);
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clk_put(host->clk);
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iounmap(host->base);
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@ -819,7 +819,7 @@ static int mxs_mmc_suspend(struct device *dev)
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ret = mmc_suspend_host(mmc);
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clk_disable(host->clk);
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clk_disable_unprepare(host->clk);
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return ret;
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}
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@ -830,7 +830,7 @@ static int mxs_mmc_resume(struct device *dev)
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struct mxs_mmc_host *host = mmc_priv(mmc);
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int ret = 0;
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clk_enable(host->clk);
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clk_prepare_enable(host->clk);
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ret = mmc_resume_host(mmc);
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@ -126,7 +126,7 @@ int gpmi_init(struct gpmi_nand_data *this)
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struct resources *r = &this->resources;
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int ret;
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ret = clk_enable(r->clock);
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ret = clk_prepare_enable(r->clock);
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if (ret)
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goto err_out;
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ret = gpmi_reset_block(r->gpmi_regs, false);
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@ -146,7 +146,7 @@ int gpmi_init(struct gpmi_nand_data *this)
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/* Select BCH ECC. */
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writel(BM_GPMI_CTRL1_BCH_MODE, r->gpmi_regs + HW_GPMI_CTRL1_SET);
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clk_disable(r->clock);
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clk_disable_unprepare(r->clock);
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return 0;
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err_out:
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return ret;
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@ -202,7 +202,7 @@ int bch_set_geometry(struct gpmi_nand_data *this)
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ecc_strength = bch_geo->ecc_strength >> 1;
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page_size = bch_geo->page_size;
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ret = clk_enable(r->clock);
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ret = clk_prepare_enable(r->clock);
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if (ret)
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goto err_out;
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@ -229,7 +229,7 @@ int bch_set_geometry(struct gpmi_nand_data *this)
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writel(BM_BCH_CTRL_COMPLETE_IRQ_EN,
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r->bch_regs + HW_BCH_CTRL_SET);
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clk_disable(r->clock);
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clk_disable_unprepare(r->clock);
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return 0;
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err_out:
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return ret;
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@ -704,7 +704,7 @@ void gpmi_begin(struct gpmi_nand_data *this)
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int ret;
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/* Enable the clock. */
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ret = clk_enable(r->clock);
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ret = clk_prepare_enable(r->clock);
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if (ret) {
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pr_err("We failed in enable the clk\n");
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goto err_out;
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@ -773,7 +773,7 @@ void gpmi_begin(struct gpmi_nand_data *this)
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void gpmi_end(struct gpmi_nand_data *this)
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{
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struct resources *r = &this->resources;
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clk_disable(r->clock);
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clk_disable_unprepare(r->clock);
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}
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/* Clears a BCH interrupt. */
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@ -802,7 +802,7 @@ static int flexcan_open(struct net_device *dev)
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struct flexcan_priv *priv = netdev_priv(dev);
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int err;
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clk_enable(priv->clk);
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clk_prepare_enable(priv->clk);
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err = open_candev(dev);
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if (err)
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@ -824,7 +824,7 @@ static int flexcan_open(struct net_device *dev)
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out_close:
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close_candev(dev);
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out:
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clk_disable(priv->clk);
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clk_disable_unprepare(priv->clk);
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return err;
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}
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@ -838,7 +838,7 @@ static int flexcan_close(struct net_device *dev)
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flexcan_chip_stop(dev);
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free_irq(dev->irq, dev);
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clk_disable(priv->clk);
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clk_disable_unprepare(priv->clk);
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close_candev(dev);
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@ -877,7 +877,7 @@ static int __devinit register_flexcandev(struct net_device *dev)
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struct flexcan_regs __iomem *regs = priv->base;
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u32 reg, err;
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clk_enable(priv->clk);
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clk_prepare_enable(priv->clk);
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/* select "bus clock", chip must be disabled */
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flexcan_chip_disable(priv);
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@ -911,7 +911,7 @@ static int __devinit register_flexcandev(struct net_device *dev)
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out:
|
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/* disable core and turn off clocks */
|
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flexcan_chip_disable(priv);
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clk_disable(priv->clk);
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clk_disable_unprepare(priv->clk);
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|
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return err;
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}
|
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|
|
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@ -1610,7 +1610,7 @@ fec_probe(struct platform_device *pdev)
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ret = PTR_ERR(fep->clk);
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goto failed_clk;
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||||
}
|
||||
clk_enable(fep->clk);
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clk_prepare_enable(fep->clk);
|
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|
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ret = fec_enet_init(ndev);
|
||||
if (ret)
|
||||
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@ -1633,7 +1633,7 @@ fec_probe(struct platform_device *pdev)
|
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fec_enet_mii_remove(fep);
|
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failed_mii_init:
|
||||
failed_init:
|
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clk_disable(fep->clk);
|
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clk_disable_unprepare(fep->clk);
|
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clk_put(fep->clk);
|
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failed_clk:
|
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for (i = 0; i < FEC_IRQ_NUM; i++) {
|
||||
|
|
@ -1666,7 +1666,7 @@ fec_drv_remove(struct platform_device *pdev)
|
|||
if (irq > 0)
|
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free_irq(irq, ndev);
|
||||
}
|
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clk_disable(fep->clk);
|
||||
clk_disable_unprepare(fep->clk);
|
||||
clk_put(fep->clk);
|
||||
iounmap(fep->hwp);
|
||||
free_netdev(ndev);
|
||||
|
|
@ -1691,7 +1691,7 @@ fec_suspend(struct device *dev)
|
|||
fec_stop(ndev);
|
||||
netif_device_detach(ndev);
|
||||
}
|
||||
clk_disable(fep->clk);
|
||||
clk_disable_unprepare(fep->clk);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -1702,7 +1702,7 @@ fec_resume(struct device *dev)
|
|||
struct net_device *ndev = dev_get_drvdata(dev);
|
||||
struct fec_enet_private *fep = netdev_priv(ndev);
|
||||
|
||||
clk_enable(fep->clk);
|
||||
clk_prepare_enable(fep->clk);
|
||||
if (netif_running(ndev)) {
|
||||
fec_restart(ndev, fep->full_duplex);
|
||||
netif_device_attach(ndev);
|
||||
|
|
|
|||
|
|
@ -425,7 +425,7 @@ static int mxs_auart_startup(struct uart_port *u)
|
|||
{
|
||||
struct mxs_auart_port *s = to_auart_port(u);
|
||||
|
||||
clk_enable(s->clk);
|
||||
clk_prepare_enable(s->clk);
|
||||
|
||||
writel(AUART_CTRL0_CLKGATE, u->membase + AUART_CTRL0_CLR);
|
||||
|
||||
|
|
@ -454,7 +454,7 @@ static void mxs_auart_shutdown(struct uart_port *u)
|
|||
writel(AUART_INTR_RXIEN | AUART_INTR_RTIEN | AUART_INTR_CTSMIEN,
|
||||
u->membase + AUART_INTR_CLR);
|
||||
|
||||
clk_disable(s->clk);
|
||||
clk_disable_unprepare(s->clk);
|
||||
}
|
||||
|
||||
static unsigned int mxs_auart_tx_empty(struct uart_port *u)
|
||||
|
|
@ -635,7 +635,7 @@ auart_console_setup(struct console *co, char *options)
|
|||
if (!s)
|
||||
return -ENODEV;
|
||||
|
||||
clk_enable(s->clk);
|
||||
clk_prepare_enable(s->clk);
|
||||
|
||||
if (options)
|
||||
uart_parse_options(options, &baud, &parity, &bits, &flow);
|
||||
|
|
@ -644,7 +644,7 @@ auart_console_setup(struct console *co, char *options)
|
|||
|
||||
ret = uart_set_options(&s->port, co, baud, parity, bits, flow);
|
||||
|
||||
clk_disable(s->clk);
|
||||
clk_disable_unprepare(s->clk);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -328,7 +328,7 @@ static void mxsfb_enable_controller(struct fb_info *fb_info)
|
|||
|
||||
dev_dbg(&host->pdev->dev, "%s\n", __func__);
|
||||
|
||||
clk_enable(host->clk);
|
||||
clk_prepare_enable(host->clk);
|
||||
clk_set_rate(host->clk, PICOS2KHZ(fb_info->var.pixclock) * 1000U);
|
||||
|
||||
/* if it was disabled, re-enable the mode again */
|
||||
|
|
@ -368,7 +368,7 @@ static void mxsfb_disable_controller(struct fb_info *fb_info)
|
|||
|
||||
writel(VDCTRL4_SYNC_SIGNALS_ON, host->base + LCDC_VDCTRL4 + REG_CLR);
|
||||
|
||||
clk_disable(host->clk);
|
||||
clk_disable_unprepare(host->clk);
|
||||
|
||||
host->enabled = 0;
|
||||
}
|
||||
|
|
@ -668,7 +668,7 @@ static int __devinit mxsfb_restore_mode(struct mxsfb_info *host)
|
|||
line_count = fb_info->fix.smem_len / fb_info->fix.line_length;
|
||||
fb_info->fix.ypanstep = 1;
|
||||
|
||||
clk_enable(host->clk);
|
||||
clk_prepare_enable(host->clk);
|
||||
host->enabled = 1;
|
||||
|
||||
return 0;
|
||||
|
|
@ -841,7 +841,7 @@ static int __devinit mxsfb_probe(struct platform_device *pdev)
|
|||
|
||||
error_register:
|
||||
if (host->enabled)
|
||||
clk_disable(host->clk);
|
||||
clk_disable_unprepare(host->clk);
|
||||
fb_destroy_modelist(&fb_info->modelist);
|
||||
error_init_fb:
|
||||
kfree(fb_info->pseudo_palette);
|
||||
|
|
|
|||
|
|
@ -107,6 +107,28 @@ static inline void clk_unprepare(struct clk *clk)
|
|||
}
|
||||
#endif
|
||||
|
||||
/* clk_prepare_enable helps cases using clk_enable in non-atomic context. */
|
||||
static inline int clk_prepare_enable(struct clk *clk)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = clk_prepare(clk);
|
||||
if (ret)
|
||||
return ret;
|
||||
ret = clk_enable(clk);
|
||||
if (ret)
|
||||
clk_unprepare(clk);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* clk_disable_unprepare helps cases using clk_disable in non-atomic context. */
|
||||
static inline void clk_disable_unprepare(struct clk *clk)
|
||||
{
|
||||
clk_disable(clk);
|
||||
clk_unprepare(clk);
|
||||
}
|
||||
|
||||
/**
|
||||
* clk_get_rate - obtain the current clock rate (in Hz) for a clock source.
|
||||
* This is only valid once the clock source has been enabled.
|
||||
|
|
|
|||
|
|
@ -210,7 +210,7 @@ int mxs_saif_put_mclk(unsigned int saif_id)
|
|||
return -EBUSY;
|
||||
}
|
||||
|
||||
clk_disable(saif->clk);
|
||||
clk_disable_unprepare(saif->clk);
|
||||
|
||||
/* disable MCLK output */
|
||||
__raw_writel(BM_SAIF_CTRL_CLKGATE,
|
||||
|
|
@ -264,7 +264,7 @@ int mxs_saif_get_mclk(unsigned int saif_id, unsigned int mclk,
|
|||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = clk_enable(saif->clk);
|
||||
ret = clk_prepare_enable(saif->clk);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue