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authorLinus Torvalds <torvalds@linux-foundation.org>2008-10-16 14:25:32 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-16 14:25:32 -0400
commit8ef50901d3c619127858b7d7f614fcab45e09d6b (patch)
treee75a0d48029d4a5857033e4edf1cd572a5a3fc62 /drivers/char/hw_random
parent435263702ef0fc9ffdc6301a71c03b1d9ac0f1e0 (diff)
parent2502991560dc8244dbe10e48473d85722c1e2ec1 (diff)
Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (51 commits) [ARM] 5308/1: Fix Viper ISA IRQ handling [ARM] 5307/1: pxa: fix CM-X2XX PCMCIA build error [ARM] 5306/1: pxa: fix build error on CM-X270 [ARM] 5302/1: ARM: OMAP: Revert omap3 WDT changes to avoid merge conflict [ARM] 5305/1: ARM: OMAP: Fix compile of McBSP by removing unnecessary check [ARM] 5301/1: ARM: OMAP: Add missing irq defines ARM: OMAP3: Add default kernel config for OMAP LDP ARM: OMAP3: Add basic board support for OMAP LDP ARM: OMAP3: Defconfig for the Gumstix Overo board (rev 3) ARM: OMAP3: Add support for the Gumstix Overo board (rev 3) ARM: OMAP3: Add Beagle defconfig ARM: OMAP3: Add minimal Beagle board support ARM: OMAP3: Add minimal omap3430 support ARM: OMAP2: Fix sparse, checkpatch warnings in OMAP2/3 IRQ code ARM: OMAP: Fixes to omap_mcbsp_request function ARM: OMAP: Add support for OMAP2430 in McBSP ARM: OMAP: Add support for McBSP devices 3 - 5 on 34xx ARM: OMAP: Allocate McBSP devices dynamically Fix sections for omap-mcbsp platform driver [ARM] S3C24XX: Additional include moves ...
Diffstat (limited to 'drivers/char/hw_random')
-rw-r--r--drivers/char/hw_random/omap-rng.c33
1 files changed, 25 insertions, 8 deletions
diff --git a/drivers/char/hw_random/omap-rng.c b/drivers/char/hw_random/omap-rng.c
index 51738bdd834e..d4e7dca06e4f 100644
--- a/drivers/char/hw_random/omap-rng.c
+++ b/drivers/char/hw_random/omap-rng.c
@@ -118,18 +118,21 @@ static int __init omap_rng_probe(struct platform_device *pdev)
118 118
119 mem = request_mem_region(res->start, res->end - res->start + 1, 119 mem = request_mem_region(res->start, res->end - res->start + 1,
120 pdev->name); 120 pdev->name);
121 if (mem == NULL) 121 if (mem == NULL) {
122 return -EBUSY; 122 ret = -EBUSY;
123 goto err_region;
124 }
123 125
124 dev_set_drvdata(&pdev->dev, mem); 126 dev_set_drvdata(&pdev->dev, mem);
125 rng_base = (u32 __force __iomem *)io_p2v(res->start); 127 rng_base = ioremap(res->start, res->end - res->start + 1);
128 if (!rng_base) {
129 ret = -ENOMEM;
130 goto err_ioremap;
131 }
126 132
127 ret = hwrng_register(&omap_rng_ops); 133 ret = hwrng_register(&omap_rng_ops);
128 if (ret) { 134 if (ret)
129 release_resource(mem); 135 goto err_register;
130 rng_base = NULL;
131 return ret;
132 }
133 136
134 dev_info(&pdev->dev, "OMAP Random Number Generator ver. %02x\n", 137 dev_info(&pdev->dev, "OMAP Random Number Generator ver. %02x\n",
135 omap_rng_read_reg(RNG_REV_REG)); 138 omap_rng_read_reg(RNG_REV_REG));
@@ -138,6 +141,18 @@ static int __init omap_rng_probe(struct platform_device *pdev)
138 rng_dev = pdev; 141 rng_dev = pdev;
139 142
140 return 0; 143 return 0;
144
145err_register:
146 iounmap(rng_base);
147 rng_base = NULL;
148err_ioremap:
149 release_resource(mem);
150err_region:
151 if (cpu_is_omap24xx()) {
152 clk_disable(rng_ick);
153 clk_put(rng_ick);
154 }
155 return ret;
141} 156}
142 157
143static int __exit omap_rng_remove(struct platform_device *pdev) 158static int __exit omap_rng_remove(struct platform_device *pdev)
@@ -148,6 +163,8 @@ static int __exit omap_rng_remove(struct platform_device *pdev)
148 163
149 omap_rng_write_reg(RNG_MASK_REG, 0x0); 164 omap_rng_write_reg(RNG_MASK_REG, 0x0);
150 165
166 iounmap(rng_base);
167
151 if (cpu_is_omap24xx()) { 168 if (cpu_is_omap24xx()) {
152 clk_disable(rng_ick); 169 clk_disable(rng_ick);
153 clk_put(rng_ick); 170 clk_put(rng_ick);