linux-kernel - Re: [PATCH] mmc: sdhci: use FIELD

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Message-ID: <CAPDyKFqnoyFGNAvcTfuGmEsKHy_b2vK90cUS1Nj_DEMJ+GgDag@mail.gmail.com>
Date:   Tue, 17 Mar 2020 12:58:22 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mmc: sdhci: use FIELD_GET for preset value bit masks

On Thu, 12 Mar 2020 at 12:01, Masahiro Yamada
<yamada.masahiro@...ionext.com> wrote:
>
> Use the FIELD_GET macro to get access to the register fields.
> Delete the shift macros.
>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>

Applied for next, thanks!

Kind regards
Uffe


> ---
>
>  drivers/mmc/host/sdhci.c | 10 +++++-----
>  drivers/mmc/host/sdhci.h | 10 ++++------
>  2 files changed, 9 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index 63db84481dff..aec6692615c8 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -9,6 +9,7 @@
>   *     - JMicron (hardware and technical support)
>   */
>
> +#include <linux/bitfield.h>
>  #include <linux/delay.h>
>  #include <linux/dmaengine.h>
>  #include <linux/ktime.h>
> @@ -1766,10 +1767,9 @@ u16 sdhci_calc_clk(struct sdhci_host *host, unsigned int clock,
>
>                         clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
>                         pre_val = sdhci_get_preset_value(host);
> -                       div = (pre_val & SDHCI_PRESET_SDCLK_FREQ_MASK)
> -                               >> SDHCI_PRESET_SDCLK_FREQ_SHIFT;
> +                       div = FIELD_GET(SDHCI_PRESET_SDCLK_FREQ_MASK, pre_val);
>                         if (host->clk_mul &&
> -                               (pre_val & SDHCI_PRESET_CLKGEN_SEL_MASK)) {
> +                               (pre_val & SDHCI_PRESET_CLKGEN_SEL)) {
>                                 clk = SDHCI_PROG_CLOCK_MODE;
>                                 real_div = div + 1;
>                                 clk_mul = host->clk_mul;
> @@ -2227,8 +2227,8 @@ void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
>
>                         sdhci_enable_preset_value(host, true);
>                         preset = sdhci_get_preset_value(host);
> -                       ios->drv_type = (preset & SDHCI_PRESET_DRV_MASK)
> -                               >> SDHCI_PRESET_DRV_SHIFT;
> +                       ios->drv_type = FIELD_GET(SDHCI_PRESET_DRV_MASK,
> +                                                 preset);
>                 }
>
>                 /* Re-enable SD Clock */
> diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
> index a6a3ddcf97e7..abdcefee24cb 100644
> --- a/drivers/mmc/host/sdhci.h
> +++ b/drivers/mmc/host/sdhci.h
> @@ -9,6 +9,7 @@
>  #ifndef __SDHCI_HW_H
>  #define __SDHCI_HW_H
>
> +#include <linux/bits.h>
>  #include <linux/scatterlist.h>
>  #include <linux/compiler.h>
>  #include <linux/types.h>
> @@ -267,12 +268,9 @@
>  #define SDHCI_PRESET_FOR_SDR104        0x6C
>  #define SDHCI_PRESET_FOR_DDR50 0x6E
>  #define SDHCI_PRESET_FOR_HS400 0x74 /* Non-standard */
> -#define SDHCI_PRESET_DRV_MASK  0xC000
> -#define SDHCI_PRESET_DRV_SHIFT  14
> -#define SDHCI_PRESET_CLKGEN_SEL_MASK   0x400
> -#define SDHCI_PRESET_CLKGEN_SEL_SHIFT  10
> -#define SDHCI_PRESET_SDCLK_FREQ_MASK   0x3FF
> -#define SDHCI_PRESET_SDCLK_FREQ_SHIFT  0
> +#define SDHCI_PRESET_DRV_MASK          GENMASK(15, 14)
> +#define SDHCI_PRESET_CLKGEN_SEL                BIT(10)
> +#define SDHCI_PRESET_SDCLK_FREQ_MASK   GENMASK(9, 0)
>
>  #define SDHCI_SLOT_INT_STATUS  0xFC
>
> --
> 2.17.1
>