ARM: davinci: convert platform code to use clk_prepare/clk_unprepare

As a first step towards migrating davinci platforms to use common clock
framework, replace all instances of clk_enable() with clk_prepare_enable()
and clk_disable() with clk_disable_unprepare(). Until the platform is
switched to use the CONFIG_HAVE_CLK_PREPARE Kconfig variable, this just
adds a might_sleep() call and would work without any issues.

This will make it easy later to switch to common clk based implementation
of clk driver from DaVinci specific driver.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Reviewed-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

diff --git a/arch/arm/mach-davinci/board-dm355-evm.c b/arch/arm/mach-davinci/board-dm355-evm.c
index 88ebea8..cdf8d07 100644 (file)
--- a/arch/arm/mach-davinci/board-dm355-evm.c
+++ b/arch/arm/mach-davinci/board-dm355-evm.c
@@ -324,7 +324,7 @@ static __init void dm355_evm_init(void)
        if (IS_ERR(aemif))
                WARN("%s: unable to get AEMIF clock\n", __func__);
        else
-               clk_enable(aemif);
+               clk_prepare_enable(aemif);
 
        platform_add_devices(davinci_evm_devices,
                             ARRAY_SIZE(davinci_evm_devices));

diff --git a/arch/arm/mach-davinci/board-dm355-leopard.c b/arch/arm/mach-davinci/board-dm355-leopard.c
index 2f88103..d419545 100644 (file)
--- a/arch/arm/mach-davinci/board-dm355-leopard.c
+++ b/arch/arm/mach-davinci/board-dm355-leopard.c
@@ -246,7 +246,7 @@ static __init void dm355_leopard_init(void)
        if (IS_ERR(aemif))
                WARN("%s: unable to get AEMIF clock\n", __func__);
        else
-               clk_enable(aemif);
+               clk_prepare_enable(aemif);
 
        platform_add_devices(davinci_leopard_devices,
                             ARRAY_SIZE(davinci_leopard_devices));

diff --git a/arch/arm/mach-davinci/board-dm365-evm.c b/arch/arm/mach-davinci/board-dm365-evm.c
index 1b4a8ad..5d49c75 100644 (file)
--- a/arch/arm/mach-davinci/board-dm365-evm.c
+++ b/arch/arm/mach-davinci/board-dm365-evm.c
@@ -478,7 +478,7 @@ static void __init evm_init_cpld(void)
        aemif_clk = clk_get(NULL, "aemif");
        if (IS_ERR(aemif_clk))
                return;
-       clk_enable(aemif_clk);
+       clk_prepare_enable(aemif_clk);
 
        if (request_mem_region(DM365_ASYNC_EMIF_DATA_CE1_BASE, SECTION_SIZE,
                        "cpld") == NULL)
@@ -489,7 +489,7 @@ static void __init evm_init_cpld(void)
                                SECTION_SIZE);
 fail:
                pr_err("ERROR: can't map CPLD\n");
-               clk_disable(aemif_clk);
+               clk_disable_unprepare(aemif_clk);
                return;
        }
 

diff --git a/arch/arm/mach-davinci/board-dm644x-evm.c b/arch/arm/mach-davinci/board-dm644x-evm.c
index f22572c..a84dfcb 100644 (file)
--- a/arch/arm/mach-davinci/board-dm644x-evm.c
+++ b/arch/arm/mach-davinci/board-dm644x-evm.c
@@ -776,7 +776,7 @@ static __init void davinci_evm_init(void)
        struct davinci_soc_info *soc_info = &davinci_soc_info;
 
        aemif_clk = clk_get(NULL, "aemif");
-       clk_enable(aemif_clk);
+       clk_prepare_enable(aemif_clk);
 
        if (HAS_ATA) {
                if (HAS_NAND || HAS_NOR)

diff --git a/arch/arm/mach-davinci/board-neuros-osd2.c b/arch/arm/mach-davinci/board-neuros-osd2.c
index 144bf31..3e3e3af 100644 (file)
--- a/arch/arm/mach-davinci/board-neuros-osd2.c
+++ b/arch/arm/mach-davinci/board-neuros-osd2.c
@@ -188,7 +188,7 @@ static __init void davinci_ntosd2_init(void)
        struct davinci_soc_info *soc_info = &davinci_soc_info;
 
        aemif_clk = clk_get(NULL, "aemif");
-       clk_enable(aemif_clk);
+       clk_prepare_enable(aemif_clk);
 
        if (HAS_ATA) {
                if (HAS_NAND)

diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c
index bd2f72b..d53612f 100644 (file)
--- a/arch/arm/mach-davinci/devices-da8xx.c
+++ b/arch/arm/mach-davinci/devices-da8xx.c
@@ -900,7 +900,7 @@ static int da850_sata_init(struct device *dev, void __iomem *addr)
        if (IS_ERR(da850_sata_clk))
                return PTR_ERR(da850_sata_clk);
 
-       ret = clk_enable(da850_sata_clk);
+       ret = clk_prepare_enable(da850_sata_clk);
        if (ret)
                goto err0;
 
@@ -931,7 +931,7 @@ static int da850_sata_init(struct device *dev, void __iomem *addr)
        return 0;
 
 err1:
-       clk_disable(da850_sata_clk);
+       clk_disable_unprepare(da850_sata_clk);
 err0:
        clk_put(da850_sata_clk);
        return ret;
@@ -939,7 +939,7 @@ err0:
 
 static void da850_sata_exit(struct device *dev)
 {
-       clk_disable(da850_sata_clk);
+       clk_disable_unprepare(da850_sata_clk);
        clk_put(da850_sata_clk);
 }
 

diff --git a/arch/arm/mach-davinci/serial.c b/arch/arm/mach-davinci/serial.c
index 1875740..24ddb0d 100644 (file)
--- a/arch/arm/mach-davinci/serial.c
+++ b/arch/arm/mach-davinci/serial.c
@@ -95,7 +95,7 @@ int __init davinci_serial_init(struct davinci_uart_config *info)
                        continue;
                }
 
-               clk_enable(uart_clk);
+               clk_prepare_enable(uart_clk);
                p->uartclk = clk_get_rate(uart_clk);
 
                if (!p->membase && p->mapbase) {

diff --git a/arch/arm/mach-davinci/time.c b/arch/arm/mach-davinci/time.c
index 75da315..9847938 100644 (file)
--- a/arch/arm/mach-davinci/time.c
+++ b/arch/arm/mach-davinci/time.c
@@ -379,7 +379,7 @@ static void __init davinci_timer_init(void)
 
        timer_clk = clk_get(NULL, "timer0");
        BUG_ON(IS_ERR(timer_clk));
-       clk_enable(timer_clk);
+       clk_prepare_enable(timer_clk);
 
        /* init timer hw */
        timer_init();
@@ -429,7 +429,7 @@ void davinci_watchdog_reset(struct platform_device *pdev)
        wd_clk = clk_get(&pdev->dev, NULL);
        if (WARN_ON(IS_ERR(wd_clk)))
                return;
-       clk_enable(wd_clk);
+       clk_prepare_enable(wd_clk);
 
        /* disable, internal clock source */
        __raw_writel(0, base + TCR);