From f2d1035e956052d29c83fe8f8da0d056af6d221a Mon Sep 17 00:00:00 2001 From: Jonas Gorski Date: Sun, 28 Oct 2012 11:49:53 +0000 Subject: MIPS: BCM63XX: add and use a clock for PCIe Add a PCIe clock and use that instead of directly touching the clock control register. While at it, fail if there is no such clock. Signed-off-by: Jonas Gorski Acked-by: Florian Fainelli Patchwork: http://patchwork.linux-mips.org/patch/4452 Signed-off-by: John Crispin --- arch/mips/pci/pci-bcm63xx.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) (limited to 'arch/mips/pci') diff --git a/arch/mips/pci/pci-bcm63xx.c b/arch/mips/pci/pci-bcm63xx.c index 8a48139d219c..fa8c320936fe 100644 --- a/arch/mips/pci/pci-bcm63xx.c +++ b/arch/mips/pci/pci-bcm63xx.c @@ -11,6 +11,7 @@ #include #include #include +#include #include #include "pci-bcm63xx.h" @@ -119,11 +120,6 @@ static void __init bcm63xx_reset_pcie(void) { u32 val; - /* enable clock */ - val = bcm_perf_readl(PERF_CKCTL_REG); - val |= CKCTL_6328_PCIE_EN; - bcm_perf_writel(val, PERF_CKCTL_REG); - /* enable SERDES */ val = bcm_misc_readl(MISC_SERDES_CTRL_REG); val |= SERDES_PCIE_EN | SERDES_PCIE_EXD_EN; @@ -150,10 +146,19 @@ static void __init bcm63xx_reset_pcie(void) mdelay(200); } +static struct clk *pcie_clk; + static int __init bcm63xx_register_pcie(void) { u32 val; + /* enable clock */ + pcie_clk = clk_get(NULL, "pcie"); + if (IS_ERR_OR_NULL(pcie_clk)) + return -ENODEV; + + clk_prepare_enable(pcie_clk); + bcm63xx_reset_pcie(); /* configure the PCIe bridge */ -- cgit v1.2.2