diff options
| author | Anish Trivedi <anish@freescale.com> | 2010-08-09 10:07:58 -0500 |
|---|---|---|
| committer | Alan Tull <r80115@freescale.com> | 2010-09-25 09:50:27 -0500 |
| commit | e05148ea7ff491aa620e0ccc8ca762421d62ad16 (patch) | |
| tree | 1aa34a09f1d40769867d4586c051a4208c1f3c12 /drivers/char | |
| parent | 072ec1840763f9e4d7ea37a08531dc4c1faec85a (diff) | |
ENGR00126057-1 Add RNGB support
Adopt the mainline RNGC driver for RNGB hw
Add clock gating on suspend resume
Signed-off-by: Anish Trivedi <anish@freescale.com>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/hw_random/fsl-rngc.c | 54 |
1 files changed, 46 insertions, 8 deletions
diff --git a/drivers/char/hw_random/fsl-rngc.c b/drivers/char/hw_random/fsl-rngc.c index 678c5bd3e9a9..c43013027daf 100644 --- a/drivers/char/hw_random/fsl-rngc.c +++ b/drivers/char/hw_random/fsl-rngc.c @@ -1,10 +1,4 @@ /* - * RNG driver for Freescale RNGC - * - * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved. - */ - -/* * The code contained herein is licensed under the GNU General Public * License. You may obtain a copy of the GNU General Public License * Version 2 or later at the following locations: @@ -33,6 +27,12 @@ * warranty of any kind, whether express or implied. */ +/* + * RNG driver for Freescale RNGC + * + * Copyright (C) 2008-2010 Freescale Semiconductor, Inc. + */ + #include <linux/module.h> #include <linux/init.h> #include <linux/kernel.h> @@ -42,7 +42,6 @@ #include <linux/interrupt.h> #include <linux/hw_random.h> #include <linux/io.h> -#include <asm/hardware.h> #define RNGC_VERSION_MAJOR3 3 @@ -292,7 +291,7 @@ static int __init fsl_rngc_probe(struct platform_device *pdev) if (rng_dev) return -EBUSY; - clk = clk_get(NULL, "rng_clk"); + clk = clk_get(&pdev->dev, "rng_clk"); if (IS_ERR(clk)) { dev_err(&pdev->dev, "Can not get rng_clk\n"); @@ -334,9 +333,17 @@ static int __init fsl_rngc_probe(struct platform_device *pdev) static int __exit fsl_rngc_remove(struct platform_device *pdev) { + struct clk *clk; struct resource *mem = dev_get_drvdata(&pdev->dev); void __iomem *rngc_base = (void __iomem *)fsl_rngc.priv; + clk = clk_get(&pdev->dev, "rng_clk"); + + if (IS_ERR(clk)) + dev_err(&pdev->dev, "Can not get rng_clk\n"); + else + clk_disable(clk); + hwrng_unregister(&fsl_rngc); release_resource(mem); @@ -346,12 +353,43 @@ static int __exit fsl_rngc_remove(struct platform_device *pdev) return 0; } +static int fsl_rngc_suspend(struct platform_device *pdev, + pm_message_t state) +{ + struct clk *clk = clk_get(&pdev->dev, "rng_clk"); + + if (IS_ERR(clk)) { + dev_err(&pdev->dev, "Can not get rng_clk\n"); + return PTR_ERR(clk); + } + + clk_disable(clk); + + return 0; +} + +static int fsl_rngc_resume(struct platform_device *pdev) +{ + struct clk *clk = clk_get(&pdev->dev, "rng_clk"); + + if (IS_ERR(clk)) { + dev_err(&pdev->dev, "Can not get rng_clk\n"); + return PTR_ERR(clk); + } + + clk_enable(clk); + + return 0; +} + static struct platform_driver fsl_rngc_driver = { .driver = { .name = "fsl_rngc", .owner = THIS_MODULE, }, .remove = __exit_p(fsl_rngc_remove), + .suspend = fsl_rngc_suspend, + .resume = fsl_rngc_resume, }; static int __init mod_init(void) |