[PATCH 3/7] ddr: altera: arria10: Change to use reset DM function

[Marek Vasut]

On 4/15/20 11:00 AM, Ley Foon Tan wrote:
> Change to use reset DM function and remove unused
> socfpga_reset_deassert_noc_ddr_scheduler().
> 
> Signed-off-by: Ley Foon Tan <ley.foon.tan at intel.com>
> ---
>  .../include/mach/reset_manager_arria10.h      |  1 -
>  arch/arm/mach-socfpga/reset_manager_arria10.c |  7 ------
>  drivers/ddr/altera/sdram_arria10.c            | 25 ++++++++++---------
>  3 files changed, 13 insertions(+), 20 deletions(-)
> 
> diff --git a/arch/arm/mach-socfpga/include/mach/reset_manager_arria10.h b/arch/arm/mach-socfpga/include/mach/reset_manager_arria10.h
> index 22e4eb33de88..a0fad7c1e2fc 100644
> --- a/arch/arm/mach-socfpga/include/mach/reset_manager_arria10.h
> +++ b/arch/arm/mach-socfpga/include/mach/reset_manager_arria10.h
> @@ -9,7 +9,6 @@
>  #include <dt-bindings/reset/altr,rst-mgr-a10.h>
>  
>  void socfpga_watchdog_disable(void);
> -void socfpga_reset_deassert_noc_ddr_scheduler(void);
>  int socfpga_reset_deassert_bridges_handoff(void);
>  void socfpga_reset_deassert_osc1wd0(void);
>  int socfpga_bridges_reset(void);
> diff --git a/arch/arm/mach-socfpga/reset_manager_arria10.c b/arch/arm/mach-socfpga/reset_manager_arria10.c
> index aa5299415a74..edfe250ec0bc 100644
> --- a/arch/arm/mach-socfpga/reset_manager_arria10.c
> +++ b/arch/arm/mach-socfpga/reset_manager_arria10.c
> @@ -62,13 +62,6 @@ void socfpga_watchdog_disable(void)
>  		     ALT_RSTMGR_PER1MODRST_WD0_SET_MSK);
>  }
>  
> -/* Release NOC ddr scheduler from reset */
> -void socfpga_reset_deassert_noc_ddr_scheduler(void)
> -{
> -	clrbits_le32(socfpga_get_rstmgr_addr() + RSTMGR_A10_BRGMODRST,
> -		     ALT_RSTMGR_BRGMODRST_DDRSCH_SET_MSK);
> -}
> -
>  static int get_bridge_init_val(const void *blob, int compat_id)
>  {
>  	int node;
> diff --git a/drivers/ddr/altera/sdram_arria10.c b/drivers/ddr/altera/sdram_arria10.c
> index a31d45a5bb8e..794c13acfa93 100644
> --- a/drivers/ddr/altera/sdram_arria10.c
> +++ b/drivers/ddr/altera/sdram_arria10.c
> @@ -10,19 +10,21 @@
>  #include <fdtdec.h>
>  #include <malloc.h>
>  #include <ram.h>
> +#include <reset.h>
>  #include <wait_bit.h>
>  #include <watchdog.h>
>  #include <asm/io.h>
>  #include <asm/arch/fpga_manager.h>
>  #include <asm/arch/misc.h>
> -#include <asm/arch/reset_manager.h>
>  #include <asm/arch/sdram.h>
> +#include <dm/device_compat.h>
>  #include <linux/kernel.h>
>  
>  DECLARE_GLOBAL_DATA_PTR;
>  
>  struct altera_sdram_priv {
>  	struct ram_info info;
> +	struct reset_ctl_bulk resets;
>  };
>  
>  struct altera_sdram_platdata {
> @@ -152,7 +154,7 @@ static int emif_reset(struct altera_sdram_platdata *plat)
>  	return 0;
>  }
>  
> -static int ddr_setup(struct altera_sdram_platdata *plat)
> +static int sdram_startup(struct altera_sdram_platdata *plat)
>  {
>  	int i, ret;
>  
> @@ -198,16 +200,6 @@ static void sdram_init_ecc_bits(u32 size)
>  	dcache_disable();
>  }
>  
> -/* Function to startup the SDRAM*/
> -static int sdram_startup(struct altera_sdram_platdata *plat)
> -{
> -	/* Release NOC ddr scheduler from reset */
> -	socfpga_reset_deassert_noc_ddr_scheduler();
> -
> -	/* Bringup the DDR (calibration and configuration) */
> -	return ddr_setup(plat);
> -}
> -
>  static u64 sdram_size_calc(struct altera_sdram_platdata *plat)
>  {
>  	u32 dramaddrw = readl(plat->iohmc + DRAMADDRW);
> @@ -703,8 +695,17 @@ static int altera_sdram_ofdata_to_platdata(struct udevice *dev)
>  
>  static int altera_sdram_probe(struct udevice *dev)
>  {
> +	int ret;
>  	struct altera_sdram_priv *priv = dev_get_priv(dev);
>  
> +	ret = reset_get_bulk(dev, &priv->resets);
> +	if (ret) {
> +		dev_err(dev, "Can't get reset: %d\n", ret);
> +		return -ENODEV;
> +	}
> +
> +	reset_deassert_bulk(&priv->resets);
> +
>  	if (ddr_calibration_sequence(dev->platdata) != 0) {
>  		puts("SDRAM init failed.\n");
>  		goto failed;
> 

I think you need to re-assert the reset in the failed: fail path.