From 4574b886698dfad6209102fed6136622b5fe1c21 Mon Sep 17 00:00:00 2001 From: Andrew Lunn Date: Fri, 6 Apr 2012 17:17:26 +0200 Subject: ARM: Orion: SPI: Add clk/clkdev support. Remove now redundant tclk from SPI platform data. This makes the platform data empty, so remove it. Signed-off-by: Andrew Lunn Tested-by: Jamie Lentin Signed-off-by: Mike Turquette --- drivers/spi/spi-orion.c | 30 +++++++++++++++++++++++------- 1 file changed, 23 insertions(+), 7 deletions(-) (limited to 'drivers/spi/spi-orion.c') diff --git a/drivers/spi/spi-orion.c b/drivers/spi/spi-orion.c index e496f79..dfd04e9 100644 --- a/drivers/spi/spi-orion.c +++ b/drivers/spi/spi-orion.c @@ -16,8 +16,8 @@ #include #include #include -#include #include +#include #include #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)); -- cgit v1.1