Re: [PATCH 2/2] arm: socfpga: Add support for Altera SoC SDRAM controller

From: Steffen Trumtrar
Date: Tue Apr 01 2014 - 01:34:39 EST


On Mon, Mar 31, 2014 at 05:07:07PM -0500, tthayer@xxxxxxxxxx wrote:
> From: Thor Thayer <tthayer@xxxxxxxxxx>
>
> Addition of the Altera SDRAM controller registers to the
> Altera SoC project. These registers are shared by future
> drivers such as ECC and the FPGA bridge.
>
> Signed-off-by: Thor Thayer <tthayer@xxxxxxxxxx>
> To: Rob Herring <rob.herring@xxxxxxxxxxx>
> To: Pawel Moll <pawel.moll@xxxxxxx>
> To: Mark Rutland <mark.rutland@xxxxxxx>
> To: Ian Campbell <ijc+devicetree@xxxxxxxxxxxxxx>
> To: Kumar Gala <galak@xxxxxxxxxxxxxx>
> To: Rob Landley <rob@xxxxxxxxxxx>
> To: Russell King <linux@xxxxxxxxxxxxxxxx>
> To: Dinh Nguyen <dinguyen@xxxxxxxxxx>
> Cc: devicetree@xxxxxxxxxxxxxxx
> Cc: linux-doc@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> ---
> arch/arm/mach-socfpga/socfpga.c | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/arch/arm/mach-socfpga/socfpga.c b/arch/arm/mach-socfpga/socfpga.c
> index 21d6026..d514e8a 100644
> --- a/arch/arm/mach-socfpga/socfpga.c
> +++ b/arch/arm/mach-socfpga/socfpga.c
> @@ -32,6 +32,7 @@
> void __iomem *socfpga_scu_base_addr = ((void __iomem *)(SOCFPGA_SCU_VIRT_BASE));
> void __iomem *sys_manager_base_addr;
> void __iomem *rst_manager_base_addr;
> +void __iomem *sdr_ctl_base_addr;
> void __iomem *clk_mgr_base_addr;
> unsigned long cpu1start_addr;
>

Can't we get rid of all these global pointers instead of adding to them?

> @@ -150,6 +151,15 @@ void __init socfpga_sysmgr_init(void)
>
> np = of_find_compatible_node(NULL, NULL, "altr,clk-mgr");
> clk_mgr_base_addr = of_iomap(np, 0);
> +
> + np = of_find_compatible_node(NULL, NULL, "altr,sdr-ctl");
> + if (!np) {
> + pr_err("SOCFPGA: Unable to find sdr-ctl\n");
> + return;
> + }
> +
> + sdr_ctl_base_addr = of_iomap(np, 0);
> + WARN_ON(!sdr_ctl_base_addr);
> }
>
> static void __init socfpga_init_irq(void)
> --
> 1.7.9.5
>

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