From: Boris BREZILLON <b.brezillon@overkiz.com> To: Nicolas Ferre <nicolas.ferre@atmel.com>, Ludovic Desroches <ludovic.desroches@atmel.com>, Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>, Chris Ball <cjb@laptop.org> Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, Boris BREZILLON <b.brezillon@overkiz.com> Subject: [PATCH v4 2/5] mmc: atmel-mci: prepare clk before calling enable Date: Thu, 18 Jul 2013 09:38:52 +0200 [thread overview] Message-ID: <1374133132-17556-1-git-send-email-b.brezillon@overkiz.com> (raw) In-Reply-To: <1374132753-15206-1-git-send-email-b.brezillon@overkiz.com> Replace clk_enable/disable with clk_prepare_enable/disable_unprepare to avoid common clk framework warnings. Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com> Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com> --- drivers/mmc/host/atmel-mci.c | 34 +++++++++++++++++++++++++++------- 1 file changed, 27 insertions(+), 7 deletions(-) diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c index bdb84da..69e438e 100644 --- a/drivers/mmc/host/atmel-mci.c +++ b/drivers/mmc/host/atmel-mci.c @@ -378,6 +378,8 @@ static int atmci_regs_show(struct seq_file *s, void *v) { struct atmel_mci *host = s->private; u32 *buf; + int ret = 0; + buf = kmalloc(ATMCI_REGS_SIZE, GFP_KERNEL); if (!buf) @@ -388,12 +390,16 @@ static int atmci_regs_show(struct seq_file *s, void *v) * not disabling interrupts, so IMR and SR may not be * consistent. */ + ret = clk_prepare_enable(host->mck); + if (ret) + goto out; + spin_lock_bh(&host->lock); - clk_enable(host->mck); memcpy_fromio(buf, host->regs, ATMCI_REGS_SIZE); - clk_disable(host->mck); spin_unlock_bh(&host->lock); + clk_disable_unprepare(host->mck); + seq_printf(s, "MR:\t0x%08x%s%s ", buf[ATMCI_MR / 4], buf[ATMCI_MR / 4] & ATMCI_MR_RDPROOF ? " RDPROOF" : "", @@ -442,9 +448,10 @@ static int atmci_regs_show(struct seq_file *s, void *v) val & ATMCI_CFG_LSYNC ? " LSYNC" : ""); } +out: kfree(buf); - return 0; + return ret; } static int atmci_regs_open(struct inode *inode, struct file *file) @@ -1262,6 +1269,7 @@ static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) struct atmel_mci_slot *slot = mmc_priv(mmc); struct atmel_mci *host = slot->host; unsigned int i; + bool unprepare_clk; slot->sdc_reg &= ~ATMCI_SDCBUS_MASK; switch (ios->bus_width) { @@ -1277,9 +1285,13 @@ static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) unsigned int clock_min = ~0U; u32 clkdiv; + clk_prepare(host->mck); + unprepare_clk = true; + spin_lock_bh(&host->lock); if (!host->mode_reg) { clk_enable(host->mck); + unprepare_clk = false; atmci_writel(host, ATMCI_CR, ATMCI_CR_SWRST); atmci_writel(host, ATMCI_CR, ATMCI_CR_MCIEN); if (host->caps.has_cfg_reg) @@ -1347,6 +1359,8 @@ static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) } else { bool any_slot_active = false; + unprepare_clk = false; + spin_lock_bh(&host->lock); slot->clock = 0; for (i = 0; i < ATMCI_MAX_NR_SLOTS; i++) { @@ -1360,12 +1374,16 @@ static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) if (host->mode_reg) { atmci_readl(host, ATMCI_MR); clk_disable(host->mck); + unprepare_clk = true; } host->mode_reg = 0; } spin_unlock_bh(&host->lock); } + if (unprepare_clk) + clk_unprepare(host->mck); + switch (ios->power_mode) { case MMC_POWER_UP: set_bit(ATMCI_CARD_NEED_INIT, &slot->flags); @@ -2376,10 +2394,12 @@ static int __init atmci_probe(struct platform_device *pdev) if (!host->regs) goto err_ioremap; - clk_enable(host->mck); + ret = clk_prepare_enable(host->mck); + if (ret) + goto err_request_irq; atmci_writel(host, ATMCI_CR, ATMCI_CR_SWRST); host->bus_hz = clk_get_rate(host->mck); - clk_disable(host->mck); + clk_disable_unprepare(host->mck); host->mapbase = regs->start; @@ -2482,11 +2502,11 @@ static int __exit atmci_remove(struct platform_device *pdev) atmci_cleanup_slot(host->slot[i], i); } - clk_enable(host->mck); + clk_prepare_enable(host->mck); atmci_writel(host, ATMCI_IDR, ~0UL); atmci_writel(host, ATMCI_CR, ATMCI_CR_MCIDIS); atmci_readl(host, ATMCI_SR); - clk_disable(host->mck); + clk_disable_unprepare(host->mck); if (host->dma.chan) dma_release_channel(host->dma.chan); -- 1.7.9.5
WARNING: multiple messages have this Message-ID (diff)
From: b.brezillon@overkiz.com (Boris BREZILLON) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v4 2/5] mmc: atmel-mci: prepare clk before calling enable Date: Thu, 18 Jul 2013 09:38:52 +0200 [thread overview] Message-ID: <1374133132-17556-1-git-send-email-b.brezillon@overkiz.com> (raw) In-Reply-To: <1374132753-15206-1-git-send-email-b.brezillon@overkiz.com> Replace clk_enable/disable with clk_prepare_enable/disable_unprepare to avoid common clk framework warnings. Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com> Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com> --- drivers/mmc/host/atmel-mci.c | 34 +++++++++++++++++++++++++++------- 1 file changed, 27 insertions(+), 7 deletions(-) diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c index bdb84da..69e438e 100644 --- a/drivers/mmc/host/atmel-mci.c +++ b/drivers/mmc/host/atmel-mci.c @@ -378,6 +378,8 @@ static int atmci_regs_show(struct seq_file *s, void *v) { struct atmel_mci *host = s->private; u32 *buf; + int ret = 0; + buf = kmalloc(ATMCI_REGS_SIZE, GFP_KERNEL); if (!buf) @@ -388,12 +390,16 @@ static int atmci_regs_show(struct seq_file *s, void *v) * not disabling interrupts, so IMR and SR may not be * consistent. */ + ret = clk_prepare_enable(host->mck); + if (ret) + goto out; + spin_lock_bh(&host->lock); - clk_enable(host->mck); memcpy_fromio(buf, host->regs, ATMCI_REGS_SIZE); - clk_disable(host->mck); spin_unlock_bh(&host->lock); + clk_disable_unprepare(host->mck); + seq_printf(s, "MR:\t0x%08x%s%s ", buf[ATMCI_MR / 4], buf[ATMCI_MR / 4] & ATMCI_MR_RDPROOF ? " RDPROOF" : "", @@ -442,9 +448,10 @@ static int atmci_regs_show(struct seq_file *s, void *v) val & ATMCI_CFG_LSYNC ? " LSYNC" : ""); } +out: kfree(buf); - return 0; + return ret; } static int atmci_regs_open(struct inode *inode, struct file *file) @@ -1262,6 +1269,7 @@ static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) struct atmel_mci_slot *slot = mmc_priv(mmc); struct atmel_mci *host = slot->host; unsigned int i; + bool unprepare_clk; slot->sdc_reg &= ~ATMCI_SDCBUS_MASK; switch (ios->bus_width) { @@ -1277,9 +1285,13 @@ static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) unsigned int clock_min = ~0U; u32 clkdiv; + clk_prepare(host->mck); + unprepare_clk = true; + spin_lock_bh(&host->lock); if (!host->mode_reg) { clk_enable(host->mck); + unprepare_clk = false; atmci_writel(host, ATMCI_CR, ATMCI_CR_SWRST); atmci_writel(host, ATMCI_CR, ATMCI_CR_MCIEN); if (host->caps.has_cfg_reg) @@ -1347,6 +1359,8 @@ static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) } else { bool any_slot_active = false; + unprepare_clk = false; + spin_lock_bh(&host->lock); slot->clock = 0; for (i = 0; i < ATMCI_MAX_NR_SLOTS; i++) { @@ -1360,12 +1374,16 @@ static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) if (host->mode_reg) { atmci_readl(host, ATMCI_MR); clk_disable(host->mck); + unprepare_clk = true; } host->mode_reg = 0; } spin_unlock_bh(&host->lock); } + if (unprepare_clk) + clk_unprepare(host->mck); + switch (ios->power_mode) { case MMC_POWER_UP: set_bit(ATMCI_CARD_NEED_INIT, &slot->flags); @@ -2376,10 +2394,12 @@ static int __init atmci_probe(struct platform_device *pdev) if (!host->regs) goto err_ioremap; - clk_enable(host->mck); + ret = clk_prepare_enable(host->mck); + if (ret) + goto err_request_irq; atmci_writel(host, ATMCI_CR, ATMCI_CR_SWRST); host->bus_hz = clk_get_rate(host->mck); - clk_disable(host->mck); + clk_disable_unprepare(host->mck); host->mapbase = regs->start; @@ -2482,11 +2502,11 @@ static int __exit atmci_remove(struct platform_device *pdev) atmci_cleanup_slot(host->slot[i], i); } - clk_enable(host->mck); + clk_prepare_enable(host->mck); atmci_writel(host, ATMCI_IDR, ~0UL); atmci_writel(host, ATMCI_CR, ATMCI_CR_MCIDIS); atmci_readl(host, ATMCI_SR); - clk_disable(host->mck); + clk_disable_unprepare(host->mck); if (host->dma.chan) dma_release_channel(host->dma.chan); -- 1.7.9.5
next prev parent reply other threads:[~2013-07-18 7:39 UTC|newest] Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top 2013-07-18 7:32 [PATCH v4 0/5] ARM: at91: prepare transition to common clk framework Boris BREZILLON 2013-07-18 7:32 ` Boris BREZILLON 2013-07-18 7:34 ` [PATCH v4 1/5] ARM: at91/tc/clocksource: replace clk_enable/disable with clk_prepare_enable/disable_unprepare Boris BREZILLON 2013-07-18 7:34 ` Boris BREZILLON 2013-07-18 7:38 ` Boris BREZILLON [this message] 2013-07-18 7:38 ` [PATCH v4 2/5] mmc: atmel-mci: prepare clk before calling enable Boris BREZILLON 2013-08-22 9:41 ` boris brezillon 2013-08-22 9:41 ` boris brezillon 2013-08-25 3:18 ` Chris Ball 2013-08-25 3:18 ` Chris Ball 2013-08-25 5:35 ` boris brezillon 2013-08-25 5:35 ` boris brezillon 2013-07-18 7:40 ` [PATCH v4 3/5] at91/avr32/atmel_lcdfb: " Boris BREZILLON 2013-07-18 7:40 ` Boris BREZILLON 2013-07-18 7:40 ` Boris BREZILLON 2013-08-30 7:18 ` Tomi Valkeinen 2013-08-30 7:18 ` Tomi Valkeinen 2013-08-30 7:18 ` Tomi Valkeinen 2013-07-18 7:43 ` [PATCH v4 4/5] USB: gadget: atmel_usba: " Boris BREZILLON 2013-07-18 7:43 ` Boris BREZILLON 2013-07-18 7:48 ` [PATCH v4 5/5] ASoC: atmel-ssc: remove clk_disable_unprepare call from critical section Boris BREZILLON 2013-07-18 7:48 ` Boris BREZILLON 2013-07-18 9:53 ` Mark Brown 2013-07-18 9:53 ` Mark Brown 2013-07-18 10:21 ` boris brezillon 2013-07-18 10:21 ` boris brezillon 2013-07-18 10:58 ` Mark Brown 2013-07-18 10:58 ` Mark Brown 2013-07-18 11:33 ` boris brezillon 2013-07-18 11:33 ` boris brezillon 2013-07-18 11:25 ` Mark Brown 2013-07-18 11:25 ` Mark Brown 2013-07-18 11:34 ` boris brezillon 2013-07-18 11:34 ` boris brezillon 2013-07-18 7:58 ` [PATCH v4 1/5] ARM: at91/tc/clocksource: replace clk_enable/disable with clk_prepare_enable/disable_unprepare Boris BREZILLON 2013-07-18 7:58 ` Boris BREZILLON 2013-08-21 12:13 ` Nicolas Ferre 2013-08-21 12:13 ` Nicolas Ferre 2013-07-22 17:03 ` [PATCH v4 0/5] ARM: at91: prepare transition to common clk framework Jean-Christophe PLAGNIOL-VILLARD 2013-07-22 17:03 ` Jean-Christophe PLAGNIOL-VILLARD
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