ARM: Orion: CESA: Add support for clk
Some orion platforms support gating of the clock. If the clock exists enable/disbale it as appropriate. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Tested-by: Jamie Lentin <jm@lentin.co.uk> Signed-off-by: Mike Turquette <mturquette@linaro.org>
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@ -87,6 +87,7 @@ static struct clk __init *kirkwood_register_gate(const char *name, u8 bit_idx)
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void __init kirkwood_clk_init(void)
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{
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struct clk *runit, *ge0, *ge1, *sata0, *sata1, *usb0, *sdio;
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struct clk *crypto;
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tclk = clk_register_fixed_rate(NULL, "tclk", NULL,
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CLK_IS_ROOT, kirkwood_tclk);
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@ -98,7 +99,7 @@ void __init kirkwood_clk_init(void)
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sata1 = kirkwood_register_gate("sata1", CGC_BIT_SATA1);
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usb0 = kirkwood_register_gate("usb0", CGC_BIT_USB0);
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sdio = kirkwood_register_gate("sdio", CGC_BIT_SDIO);
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kirkwood_register_gate("crypto", CGC_BIT_CRYPTO);
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crypto = kirkwood_register_gate("crypto", CGC_BIT_CRYPTO);
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kirkwood_register_gate("xor0", CGC_BIT_XOR0);
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kirkwood_register_gate("xor1", CGC_BIT_XOR1);
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kirkwood_register_gate("pex0", CGC_BIT_PEX0);
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@ -118,6 +119,7 @@ void __init kirkwood_clk_init(void)
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orion_clkdev_add(NULL, "orion-ehci.0", usb0);
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orion_clkdev_add(NULL, "orion_nand", runit);
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orion_clkdev_add(NULL, "mvsdio", sdio);
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orion_clkdev_add(NULL, "mv_crypto", crypto);
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}
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/*****************************************************************************
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@ -16,6 +16,7 @@
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#include <linux/scatterlist.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/clk.h>
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#include <crypto/internal/hash.h>
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#include <crypto/sha.h>
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@ -79,6 +80,7 @@ struct crypto_priv {
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void __iomem *reg;
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void __iomem *sram;
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int irq;
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struct clk *clk;
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struct task_struct *queue_th;
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/* the lock protects queue and eng_st */
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@ -1053,6 +1055,12 @@ static int mv_probe(struct platform_device *pdev)
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if (ret)
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goto err_thread;
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/* Not all platforms can gate the clock, so it is not
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an error if the clock does not exists. */
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cp->clk = clk_get(&pdev->dev, NULL);
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if (!IS_ERR(cp->clk))
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clk_prepare_enable(cp->clk);
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writel(SEC_INT_ACCEL0_DONE, cpg->reg + SEC_ACCEL_INT_MASK);
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writel(SEC_CFG_STOP_DIG_ERR, cpg->reg + SEC_ACCEL_CFG);
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writel(SRAM_CONFIG, cpg->reg + SEC_ACCEL_DESC_P0);
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@ -1118,6 +1126,12 @@ static int mv_remove(struct platform_device *pdev)
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memset(cp->sram, 0, cp->sram_size);
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iounmap(cp->sram);
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iounmap(cp->reg);
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if (!IS_ERR(cp->clk)) {
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clk_disable_unprepare(cp->clk);
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clk_put(cp->clk);
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}
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kfree(cp);
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cpg = NULL;
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return 0;
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