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authorLinus Torvalds <torvalds@linux-foundation.org>2012-05-26 12:42:29 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-26 12:42:29 -0700
commit27953437059c64d14086196eb96f43c78caa9db3 (patch)
tree0cfd5fb21262a6db3de0c64462847b4c0c43e9df /drivers/spi
parent2c757fd5d1a92086f225a75a8fac7cab242d11b0 (diff)
parent3c0dec5f58b3c7b3627715126d1bf9b030a076f0 (diff)
Merge tag 'clock' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull arm-soc clock driver changes from Olof Johansson: "The new clock subsystem was merged in linux-3.4 without any users, this now moves the first three platforms over to it: imx, mxs and spear. The series also contains the changes for the clock subsystem itself, since Mike preferred to have it together with the platforms that require these changes, in order to avoid interdependencies and conflicts." Fix up trivial conflicts in arch/arm/mach-kirkwood/common.c (code removed in one branch, added OF support in another) and drivers/dma/imx-sdma.c (independent changes next to each other). * tag 'clock' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (97 commits) clk: Fix CLK_SET_RATE_GATE flag validation in clk_set_rate(). clk: Provide dummy clk_unregister() SPEAr: Update defconfigs SPEAr: Add SMI NOR partition info in dts files SPEAr: Switch to common clock framework SPEAr: Call clk_prepare() before calling clk_enable SPEAr: clk: Add General Purpose Timer Synthesizer clock SPEAr: clk: Add Fractional Synthesizer clock SPEAr: clk: Add Auxiliary Synthesizer clock SPEAr: clk: Add VCO-PLL Synthesizer clock SPEAr: Add DT bindings for SPEAr's timer ARM i.MX: remove now unused clock files ARM: i.MX6: implement clocks using common clock framework ARM i.MX35: implement clocks using common clock framework ARM i.MX5: implement clocks using common clock framework ARM: Kirkwood: Replace clock gating ARM: Orion: Audio: Add clk/clkdev support ARM: Orion: PCIE: Add support for clk ARM: Orion: XOR: Add support for clk ARM: Orion: CESA: Add support for clk ...
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-imx.c30
-rw-r--r--drivers/spi/spi-orion.c30
2 files changed, 42 insertions, 18 deletions
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 69c9a6601f4..47877d68761 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -86,7 +86,8 @@ struct spi_imx_data {
struct completion xfer_done;
void __iomem *base;
int irq;
- struct clk *clk;
+ struct clk *clk_per;
+ struct clk *clk_ipg;
unsigned long spi_clk;
unsigned int count;
@@ -853,15 +854,22 @@ static int __devinit spi_imx_probe(struct platform_device *pdev)
goto out_free_irq;
}
- spi_imx->clk = clk_get(&pdev->dev, NULL);
- if (IS_ERR(spi_imx->clk)) {
- dev_err(&pdev->dev, "unable to get clock\n");
- ret = PTR_ERR(spi_imx->clk);
+ spi_imx->clk_ipg = devm_clk_get(&pdev->dev, "ipg");
+ if (IS_ERR(spi_imx->clk_ipg)) {
+ ret = PTR_ERR(spi_imx->clk_ipg);
goto out_free_irq;
}
- clk_enable(spi_imx->clk);
- spi_imx->spi_clk = clk_get_rate(spi_imx->clk);
+ spi_imx->clk_per = devm_clk_get(&pdev->dev, "per");
+ if (IS_ERR(spi_imx->clk_per)) {
+ ret = PTR_ERR(spi_imx->clk_per);
+ goto out_free_irq;
+ }
+
+ clk_prepare_enable(spi_imx->clk_per);
+ clk_prepare_enable(spi_imx->clk_ipg);
+
+ spi_imx->spi_clk = clk_get_rate(spi_imx->clk_per);
spi_imx->devtype_data->reset(spi_imx);
@@ -879,8 +887,8 @@ static int __devinit spi_imx_probe(struct platform_device *pdev)
return ret;
out_clk_put:
- clk_disable(spi_imx->clk);
- clk_put(spi_imx->clk);
+ clk_disable_unprepare(spi_imx->clk_per);
+ clk_disable_unprepare(spi_imx->clk_ipg);
out_free_irq:
free_irq(spi_imx->irq, spi_imx);
out_iounmap:
@@ -908,8 +916,8 @@ static int __devexit spi_imx_remove(struct platform_device *pdev)
spi_bitbang_stop(&spi_imx->bitbang);
writel(0, spi_imx->base + MXC_CSPICTRL);
- clk_disable(spi_imx->clk);
- clk_put(spi_imx->clk);
+ clk_disable_unprepare(spi_imx->clk_per);
+ clk_disable_unprepare(spi_imx->clk_ipg);
free_irq(spi_imx->irq, spi_imx);
iounmap(spi_imx->base);
diff --git a/drivers/spi/spi-orion.c b/drivers/spi/spi-orion.c
index e496f799b7a..dfd04e91fa6 100644
--- a/drivers/spi/spi-orion.c
+++ b/drivers/spi/spi-orion.c
@@ -16,8 +16,8 @@
#include <linux/err.h>
#include <linux/io.h>
#include <linux/spi/spi.h>
-#include <linux/spi/orion_spi.h>
#include <linux/module.h>
+#include <linux/clk.h>
#include <asm/unaligned.h>
#define DRIVER_NAME "orion_spi"
@@ -46,6 +46,7 @@ struct orion_spi {
unsigned int max_speed;
unsigned int min_speed;
struct orion_spi_info *spi_info;
+ struct clk *clk;
};
static struct workqueue_struct *orion_spi_wq;
@@ -104,7 +105,7 @@ static int orion_spi_baudrate_set(struct spi_device *spi, unsigned int speed)
orion_spi = spi_master_get_devdata(spi->master);
- tclk_hz = orion_spi->spi_info->tclk;
+ tclk_hz = clk_get_rate(orion_spi->clk);
/*
* the supported rates are: 4,6,8...30
@@ -450,6 +451,7 @@ static int __init orion_spi_probe(struct platform_device *pdev)
struct orion_spi *spi;
struct resource *r;
struct orion_spi_info *spi_info;
+ unsigned long tclk_hz;
int status = 0;
spi_info = pdev->dev.platform_data;
@@ -476,19 +478,28 @@ static int __init orion_spi_probe(struct platform_device *pdev)
spi->master = master;
spi->spi_info = spi_info;
- spi->max_speed = DIV_ROUND_UP(spi_info->tclk, 4);
- spi->min_speed = DIV_ROUND_UP(spi_info->tclk, 30);
+ spi->clk = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(spi->clk)) {
+ status = PTR_ERR(spi->clk);
+ goto out;
+ }
+
+ clk_prepare(spi->clk);
+ clk_enable(spi->clk);
+ tclk_hz = clk_get_rate(spi->clk);
+ spi->max_speed = DIV_ROUND_UP(tclk_hz, 4);
+ spi->min_speed = DIV_ROUND_UP(tclk_hz, 30);
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (r == NULL) {
status = -ENODEV;
- goto out;
+ goto out_rel_clk;
}
if (!request_mem_region(r->start, resource_size(r),
dev_name(&pdev->dev))) {
status = -EBUSY;
- goto out;
+ goto out_rel_clk;
}
spi->base = ioremap(r->start, SZ_1K);
@@ -508,7 +519,9 @@ static int __init orion_spi_probe(struct platform_device *pdev)
out_rel_mem:
release_mem_region(r->start, resource_size(r));
-
+out_rel_clk:
+ clk_disable_unprepare(spi->clk);
+ clk_put(spi->clk);
out:
spi_master_put(master);
return status;
@@ -526,6 +539,9 @@ static int __exit orion_spi_remove(struct platform_device *pdev)
cancel_work_sync(&spi->work);
+ clk_disable_unprepare(spi->clk);
+ clk_put(spi->clk);
+
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(r->start, resource_size(r));