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Date: Fri, 16 Jan 2015 23:51:40 +0100
From: Richard Weinberger <richard@....at>
To: ssantosh@...nel.org
CC: linux-kernel@...r.kernel.org, d.walter@...0.at
Subject: Re: [PATCH] ddr: Use less generic identifiers
Am 04.01.2015 um 16:48 schrieb Richard Weinberger:
> At least on UML this identifiers clash with register names.
> Use something less generic than Rx, Cx and Cx.
>
> CC lib//jedec_ddr_data.o
> In file included from ./arch/um/include/asm/ptrace-generic.h:11:0,
> from ./arch/x86/um/asm/ptrace.h:8,
> from ./arch/x86/include/asm/alternative.h:8,
> from ./arch/x86/include/asm/bitops.h:16,
> from include/linux/bitops.h:36,
> from include/linux/kernel.h:10,
> from include/linux/list.h:8,
> from include/linux/module.h:9,
> from lib//jedec_ddr_data.c:14:
> ./arch/x86/include/uapi/asm/ptrace-abi.h:28:0: warning: "R15" redefined [enabled by default]
> #define R15 0
>
> Signed-off-by: Richard Weinberger <richard@....at>
> ---
> Please note that this patch is untested.
>
> Thanks,
> //richard
> ---
> drivers/memory/emif.c | 4 ++--
> include/memory/jedec_ddr.h | 36 ++++++++++++++++++------------------
> lib/jedec_ddr_data.c | 20 ++++++++++----------
> 3 files changed, 30 insertions(+), 30 deletions(-)
>
> diff --git a/drivers/memory/emif.c b/drivers/memory/emif.c
> index 04644e7..e0aa09f 100644
> --- a/drivers/memory/emif.c
> +++ b/drivers/memory/emif.c
> @@ -439,7 +439,7 @@ static u32 get_sdram_tim_1_shdw(const struct lpddr2_timings *timings,
> val = max(min_tck->tWTR, DIV_ROUND_UP(timings->tWTR, t_ck)) - 1;
> tim1 |= val << T_WTR_SHIFT;
>
> - if (addressing->num_banks == B8)
> + if (addressing->num_banks == DDR_BANK_8)
> val = DIV_ROUND_UP(timings->tFAW, t_ck*4);
> else
> val = max(min_tck->tRRD, DIV_ROUND_UP(timings->tRRD, t_ck));
> @@ -476,7 +476,7 @@ static u32 get_sdram_tim_1_shdw_derated(const struct lpddr2_timings *timings,
> * tFAW is approximately 4 times tRRD. So add 1875*4 = 7500ps
> * to tFAW for de-rating
> */
> - if (addressing->num_banks == B8) {
> + if (addressing->num_banks == DDR_BANK_8) {
> val = DIV_ROUND_UP(timings->tFAW + 7500, 4 * t_ck) - 1;
> } else {
> val = DIV_ROUND_UP(timings->tRRD + 1875, t_ck);
> diff --git a/include/memory/jedec_ddr.h b/include/memory/jedec_ddr.h
> index ddad0f8..39144d0 100644
> --- a/include/memory/jedec_ddr.h
> +++ b/include/memory/jedec_ddr.h
> @@ -40,28 +40,28 @@
> #define DDR_IO_WIDTH_32 4
>
> /* Number of Row bits */
> -#define R9 9
> -#define R10 10
> -#define R11 11
> -#define R12 12
> -#define R13 13
> -#define R14 14
> -#define R15 15
> -#define R16 16
> +#define DDR_ROW_9 9
> +#define DDR_ROW_10 10
> +#define DDR_ROW_11 11
> +#define DDR_ROW_12 12
> +#define DDR_ROW_13 13
> +#define DDR_ROW_14 14
> +#define DDR_ROW_15 15
> +#define DDR_ROW_16 16
>
> /* Number of Column bits */
> -#define C7 7
> -#define C8 8
> -#define C9 9
> -#define C10 10
> -#define C11 11
> -#define C12 12
> +#define DDR_COL_7 7
> +#define DDR_COL_8 8
> +#define DDR_COL_9 9
> +#define DDR_COL_10 10
> +#define DDR_COL_11 11
> +#define DDR_COL_12 12
>
> /* Number of Banks */
> -#define B1 0
> -#define B2 1
> -#define B4 2
> -#define B8 3
> +#define DDR_BANK_1 0
> +#define DDR_BANK_2 1
> +#define DDR_BANK_4 2
> +#define DDR_BANK_8 3
>
> /* Refresh rate in nano-seconds */
> #define T_REFI_15_6 15600
> diff --git a/lib/jedec_ddr_data.c b/lib/jedec_ddr_data.c
> index 6d2cbf1..2181be4 100644
> --- a/lib/jedec_ddr_data.c
> +++ b/lib/jedec_ddr_data.c
> @@ -16,16 +16,16 @@
> /* LPDDR2 addressing details from JESD209-2 section 2.4 */
> const struct lpddr2_addressing
> lpddr2_jedec_addressing_table[NUM_DDR_ADDR_TABLE_ENTRIES] = {
> - {B4, T_REFI_15_6, T_RFC_90}, /* 64M */
> - {B4, T_REFI_15_6, T_RFC_90}, /* 128M */
> - {B4, T_REFI_7_8, T_RFC_90}, /* 256M */
> - {B4, T_REFI_7_8, T_RFC_90}, /* 512M */
> - {B8, T_REFI_7_8, T_RFC_130}, /* 1GS4 */
> - {B8, T_REFI_3_9, T_RFC_130}, /* 2GS4 */
> - {B8, T_REFI_3_9, T_RFC_130}, /* 4G */
> - {B8, T_REFI_3_9, T_RFC_210}, /* 8G */
> - {B4, T_REFI_7_8, T_RFC_130}, /* 1GS2 */
> - {B4, T_REFI_3_9, T_RFC_130}, /* 2GS2 */
> + {DDR_BANK_4, T_REFI_15_6, T_RFC_90}, /* 64M */
> + {DDR_BANK_4, T_REFI_15_6, T_RFC_90}, /* 128M */
> + {DDR_BANK_4, T_REFI_7_8, T_RFC_90}, /* 256M */
> + {DDR_BANK_4, T_REFI_7_8, T_RFC_90}, /* 512M */
> + {DDR_BANK_8, T_REFI_7_8, T_RFC_130}, /* 1GS4 */
> + {DDR_BANK_8, T_REFI_3_9, T_RFC_130}, /* 2GS4 */
> + {DDR_BANK_8, T_REFI_3_9, T_RFC_130}, /* 4G */
> + {DDR_BANK_8, T_REFI_3_9, T_RFC_210}, /* 8G */
> + {DDR_BANK_4, T_REFI_7_8, T_RFC_130}, /* 1GS2 */
> + {DDR_BANK_4, T_REFI_3_9, T_RFC_130}, /* 2GS2 */
> };
> EXPORT_SYMBOL_GPL(lpddr2_jedec_addressing_table);
Ping?
Thanks,
//richard
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