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authorArnd Bergmann <arnd@arndb.de>2012-05-16 16:35:25 +0200
committerArnd Bergmann <arnd@arndb.de>2012-05-16 16:35:25 +0200
commit3c0dec5f58b3c7b3627715126d1bf9b030a076f0 (patch)
tree4bf8f56fca3bf6be109209b116fc8e32cb2e0f9e /drivers/spi
parentfcd8d84a585f3578a9ebdd27e757495a27415322 (diff)
parent7e0fa1b5fa91d9aa456d102c273b2cf0f2e95d39 (diff)
Merge branch 'clk-next' of git://git.linaro.org/people/mturquette/linux into next/clock
* 'clk-next' of git://git.linaro.org/people/mturquette/linux: clk: Fix CLK_SET_RATE_GATE flag validation in clk_set_rate(). clk: Provide dummy clk_unregister() 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 ARM: Orion: SDIO: Add support for clk. ARM: Orion: NAND: Add support for clk, if there is one. ARM: Orion: EHCI: Add support for enabling clocks ARM: Orion: SATA: Add per channel clk/clkdev support. ARM: Orion: UART: Get the clock rate via clk_get_rate(). ARM: Orion: WDT: Add clk/clkdev support ARM: Orion: Eth: Add clk/clkdev support. ARM: Orion: SPI: Add clk/clkdev support. ARM: Orion: Add clocks using the generic clk infrastructure. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-orion.c30
1 files changed, 23 insertions, 7 deletions
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));