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SubjectRe: [PATCH V1 2/3] mmc: sdhci-msm: Add msm version specific ops and data structures
On Thu, May 17, 2018 at 3:30 AM Vijay Viswanath <vviswana@codeaurora.org>
wrote:

> In addition to offsets of certain registers changing, the registers in
> core_mem have been shifted to HC mem as well. To access these registers,
> define msm version specific functions. These functions can be loaded
> into the function pointers at the time of probe based on the msm version
> detected.

> Also defind new data structure to hold version specific Ops and register
> addresses.

> Signed-off-by: Sayali Lokhande <sayalil@codeaurora.org>
> Signed-off-by: Vijay Viswanath <vviswana@codeaurora.org>
> ---
> drivers/mmc/host/sdhci-msm.c | 112
+++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 112 insertions(+)

> diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
> index 2524455..bb2bb59 100644
> --- a/drivers/mmc/host/sdhci-msm.c
> +++ b/drivers/mmc/host/sdhci-msm.c
> @@ -226,6 +226,25 @@ struct sdhci_msm_offset {
> .core_ddr_config_2 = 0x1BC,
> };

> +struct sdhci_msm_variant_ops {
> + u8 (*msm_readb_relaxed)(struct sdhci_host *host, u32 offset);

I don't see any uses of msm_readb_relaxed or msm_writeb_relaxed in this
patch or the next one. Are these needed?

> + u32 (*msm_readl_relaxed)(struct sdhci_host *host, u32 offset);
> + void (*msm_writeb_relaxed)(u8 val, struct sdhci_host *host, u32
offset);
> + void (*msm_writel_relaxed)(u32 val, struct sdhci_host *host,
> + u32 offset);
> +};
> +
> +/*
> + * From V5, register spaces have changed. Wrap this info in a structure
> + * and choose the data_structure based on version info mentioned in DT.
> + */
> +struct sdhci_msm_variant_info {
> + bool mci_removed;
> + const struct sdhci_msm_variant_ops *var_ops;
> + const struct sdhci_msm_offset *offset;
> +};
> +
> +

Remove extra blank line.

> struct sdhci_msm_host {
> struct platform_device *pdev;
> void __iomem *core_mem; /* MSM SDCC mapped address */
> @@ -245,8 +264,75 @@ struct sdhci_msm_host {
> wait_queue_head_t pwr_irq_wait;
> bool pwr_irq_flag;
> u32 caps_0;
> + bool mci_removed;
> + const struct sdhci_msm_variant_ops *var_ops;
> + const struct sdhci_msm_offset *offset;
> };

> +/*
> + * APIs to read/write to vendor specific registers which were there in
the
> + * core_mem region before MCI was removed.
> + */
> +static u8 sdhci_msm_mci_variant_readb_relaxed(struct sdhci_host *host,
> + u32 offset)
> +{
> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
> +
> + return readb_relaxed(msm_host->core_mem + offset);
> +}
> +
> +static u8 sdhci_msm_v5_variant_readb_relaxed(struct sdhci_host *host,
> + u32 offset)
> +{
> + return readb_relaxed(host->ioaddr + offset);
> +}
> +
> +static u32 sdhci_msm_mci_variant_readl_relaxed(struct sdhci_host *host,
> + u32 offset)
> +{
> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
> +
> + return readl_relaxed(msm_host->core_mem + offset);
> +}
> +
> +static u32 sdhci_msm_v5_variant_readl_relaxed(struct sdhci_host *host,
> + u32 offset)
> +{
> + return readl_relaxed(host->ioaddr + offset);
> +}
> +
> +static void sdhci_msm_mci_variant_writeb_relaxed(u8 val,
> + struct sdhci_host *host, u32 offset)
> +{
> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
> +
> + writeb_relaxed(val, msm_host->core_mem + offset);
> +}
> +
> +static void sdhci_msm_v5_variant_writeb_relaxed(u8 val, struct
sdhci_host *host,
> + u32 offset)
> +{
> + writeb_relaxed(val, host->ioaddr + offset);
> +}
> +
> +static void sdhci_msm_mci_variant_writel_relaxed(u32 val,
> + struct sdhci_host *host, u32 offset)
> +{
> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
> +
> + writel_relaxed(val, msm_host->core_mem + offset);
> +}
> +
> +static void sdhci_msm_v5_variant_writel_relaxed(u32 val, struct
sdhci_host *host,

You squeaked over 80 characters here. Move the second parameter down with
the third.

-Evan

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