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MIPS: lantiq: Disable xbar fpi burst mode 

Signed-off-by: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11458/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
hifive-unleashed-5.1
John Crispin 2015-11-05 03:56:23 +01:00 committed by Ralf Baechle
parent 9eb8c69e0b
commit 08b3c894e5
1 changed files with 41 additions and 0 deletions
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41
arch/mips/lantiq/xway/sysctrl.c
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@ -145,7 +145,15 @@ static u32 pmu_clk_cr_b[] = {
#define pmu_w32(x, y) ltq_w32((x), pmu_membase + (y))
#define pmu_r32(x) ltq_r32(pmu_membase + (x))
#define XBAR_ALWAYS_LAST 0x430
#define XBAR_FPI_BURST_EN BIT(1)
#define XBAR_AHB_BURST_EN BIT(2)
#define xbar_w32(x, y) ltq_w32((x), ltq_xbar_membase + (y))
#define xbar_r32(x) ltq_r32(ltq_xbar_membase + (x))
static void __iomem *pmu_membase;
static void __iomem *ltq_xbar_membase;
void __iomem *ltq_cgu_membase;
void __iomem *ltq_ebu_membase;
@ -285,6 +293,16 @@ static void pci_ext_disable(struct clk *clk)
ltq_cgu_w32((1 << 31) | (1 << 30), pcicr);
}
static void xbar_fpi_burst_disable(void)
{
u32 reg;
/* bit 1 as 1 --burst; bit 1 as 0 -- single */
reg = xbar_r32(XBAR_ALWAYS_LAST);
reg &= ~XBAR_FPI_BURST_EN;
xbar_w32(reg, XBAR_ALWAYS_LAST);
}
/* enable a clockout source */
static int clkout_enable(struct clk *clk)
{
@ -441,6 +459,26 @@ void __init ltq_soc_init(void)
if (!pmu_membase || !ltq_cgu_membase || !ltq_ebu_membase)
panic("Failed to remap core resources");
if (of_machine_is_compatible("lantiq,vr9")) {
struct resource res_xbar;
struct device_node *np_xbar =
of_find_compatible_node(NULL, NULL,
"lantiq,xbar-xway");
if (!np_xbar)
panic("Failed to load xbar nodes from devicetree");
if (of_address_to_resource(np_pmu, 0, &res_xbar))
panic("Failed to get xbar resources");
if (request_mem_region(res_xbar.start, resource_size(&res_xbar),
res_xbar.name) < 0)
panic("Failed to get xbar resources");
ltq_xbar_membase = ioremap_nocache(res_xbar.start,
resource_size(&res_xbar));
if (!ltq_xbar_membase)
panic("Failed to remap xbar resources");
}
/* make sure to unprotect the memory region where flash is located */
ltq_ebu_w32(ltq_ebu_r32(LTQ_EBU_BUSCON0) & ~EBU_WRDIS, LTQ_EBU_BUSCON0);
@ -567,4 +605,7 @@ void __init ltq_soc_init(void)
clkdev_add_pmu("1e116000.mei", "dfe", 1, 0, PMU_DFE);
clkdev_add_pmu("1e100400.serial", NULL, 1, 0, PMU_ASC0);
}
if (of_machine_is_compatible("lantiq,vr9"))
xbar_fpi_burst_disable();
}