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ARM: Orion: SPI: Add clk/clkdev support.

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Remove now redundant tclk from SPI platform data. This makes the platform
data empty, so remove it.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Jamie Lentin <jm@lentin.co.uk>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This commit is contained in:
Andrew Lunn
2012-04-06 17:17:26 +02:00
committed by Mike Turquette
parent 2f129bf4aa
commit 4574b88669
15 changed files with 70 additions and 55 deletions
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30
drivers/spi/spi-orion.c
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@@ -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));