[U-Boot] [PATCH] dm: spi: Correct SPI claim/release_bus() methods
Peng Fan
Peng.Fan at freescale.com
Mon Apr 20 06:41:55 CEST 2015
Hi, Simon
On 4/19/2015 11:05 PM, Simon Glass wrote:
> These methods should be passed a slave device, not a bus. This matches the
> old SPI interface. It is important to know which device is claiming the bus
> so passing a bus is not that useful.
>
> Reported-by: Haikun Wang <haikun.wang at freescale.com>
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---
>
> drivers/spi/exynos_spi.c | 6 ++++--
> drivers/spi/spi-uclass.c | 4 ++--
> drivers/spi/tegra114_spi.c | 3 ++-
> drivers/spi/tegra20_sflash.c | 3 ++-
> drivers/spi/tegra20_slink.c | 3 ++-
> include/spi.h | 10 +++++-----
> 6 files changed, 17 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/spi/exynos_spi.c b/drivers/spi/exynos_spi.c
> index a46d8c1..67f6b2d 100644
> --- a/drivers/spi/exynos_spi.c
> +++ b/drivers/spi/exynos_spi.c
> @@ -296,8 +296,9 @@ static int exynos_spi_probe(struct udevice *bus)
> return 0;
> }
>
> -static int exynos_spi_claim_bus(struct udevice *bus)
> +static int exynos_spi_claim_bus(struct udevice *dev)
> {
> + struct udevice *bus = dev->parent;
> struct exynos_spi_priv *priv = dev_get_priv(bus);
>
> exynos_pinmux_config(priv->periph_id, PINMUX_FLAG_NONE);
> @@ -308,8 +309,9 @@ static int exynos_spi_claim_bus(struct udevice *bus)
> return 0;
> }
>
> -static int exynos_spi_release_bus(struct udevice *bus)
> +static int exynos_spi_release_bus(struct udevice *dev)
> {
> + struct udevice *bus = dev->parent;
> struct exynos_spi_priv *priv = dev_get_priv(bus);
>
> spi_flush_fifo(priv->regs);
> diff --git a/drivers/spi/spi-uclass.c b/drivers/spi/spi-uclass.c
> index 866c48f..83fe8e0 100644
> --- a/drivers/spi/spi-uclass.c
> +++ b/drivers/spi/spi-uclass.c
> @@ -67,7 +67,7 @@ int spi_claim_bus(struct spi_slave *slave)
> if (ret)
> return ret;
>
> - return ops->claim_bus ? ops->claim_bus(bus) : 0;
> + return ops->claim_bus ? ops->claim_bus(dev) : 0;
> }
>
> void spi_release_bus(struct spi_slave *slave)
> @@ -77,7 +77,7 @@ void spi_release_bus(struct spi_slave *slave)
> struct dm_spi_ops *ops = spi_get_ops(bus);
>
> if (ops->release_bus)
> - ops->release_bus(bus);
> + ops->release_bus(dev);
> }
>
> int spi_xfer(struct spi_slave *slave, unsigned int bitlen,
> diff --git a/drivers/spi/tegra114_spi.c b/drivers/spi/tegra114_spi.c
> index 53ff9ea..4bec663 100644
> --- a/drivers/spi/tegra114_spi.c
> +++ b/drivers/spi/tegra114_spi.c
> @@ -153,8 +153,9 @@ static int tegra114_spi_probe(struct udevice *bus)
> return 0;
> }
>
> -static int tegra114_spi_claim_bus(struct udevice *bus)
> +static int tegra114_spi_claim_bus(struct udevice *dev)
> {
> + struct udevice *bus = dev->parent;
> struct tegra114_spi_priv *priv = dev_get_priv(bus);
> struct spi_regs *regs = priv->regs;
>
> diff --git a/drivers/spi/tegra20_sflash.c b/drivers/spi/tegra20_sflash.c
> index 78c74cd..82c1b84 100644
> --- a/drivers/spi/tegra20_sflash.c
> +++ b/drivers/spi/tegra20_sflash.c
> @@ -125,8 +125,9 @@ static int tegra20_sflash_probe(struct udevice *bus)
> return 0;
> }
>
> -static int tegra20_sflash_claim_bus(struct udevice *bus)
> +static int tegra20_sflash_claim_bus(struct udevice *dev)
> {
> + struct udevice *bus = dev->parent;
> struct tegra20_sflash_priv *priv = dev_get_priv(bus);
> struct spi_regs *regs = priv->regs;
> u32 reg;
> diff --git a/drivers/spi/tegra20_slink.c b/drivers/spi/tegra20_slink.c
> index 597d6ad..f6fb89b 100644
> --- a/drivers/spi/tegra20_slink.c
> +++ b/drivers/spi/tegra20_slink.c
> @@ -141,8 +141,9 @@ static int tegra30_spi_probe(struct udevice *bus)
> return 0;
> }
>
> -static int tegra30_spi_claim_bus(struct udevice *bus)
> +static int tegra30_spi_claim_bus(struct udevice *dev)
> {
> + struct udevice *bus = dev->parent;
> struct tegra30_spi_priv *priv = dev_get_priv(bus);
> struct spi_regs *regs = priv->regs;
> u32 reg;
> diff --git a/include/spi.h b/include/spi.h
> index c58e453..863e6db 100644
> --- a/include/spi.h
> +++ b/include/spi.h
> @@ -385,12 +385,12 @@ struct dm_spi_ops {
> * allowed to claim the same bus for several slaves without releasing
> * the bus in between.
> *
> - * @bus: The SPI slave
> + * @dev: The SPI slave
> *
> * Returns: 0 if the bus was claimed successfully, or a negative value
> * if it wasn't.
> */
> - int (*claim_bus)(struct udevice *bus);
> + int (*claim_bus)(struct udevice *dev);
>
> /**
> * Release the SPI bus
> @@ -399,9 +399,9 @@ struct dm_spi_ops {
> * all transfers have finished. It may disable any SPI hardware as
> * appropriate.
> *
> - * @bus: The SPI slave
> + * @dev: The SPI slave
> */
> - int (*release_bus)(struct udevice *bus);
> + int (*release_bus)(struct udevice *dev);
>
> /**
> * Set the word length for SPI transactions
> @@ -413,7 +413,7 @@ struct dm_spi_ops {
> *
> * Returns: 0 on success, -ve on failure.
> */
> - int (*set_wordlen)(struct udevice *bus, unsigned int wordlen);
> + int (*set_wordlen)(struct udevice *dev, unsigned int wordlen);
>
> /**
> * SPI transfer
After applying this patch, qspi flashes can be correctly probed and
read/write on i.MX platform. I original posted a patch
https://patchwork.ozlabs.org/patch/461034/ which seems in wrong way:)
Tested-by: Peng Fan <Peng.Fan at freescale.com>
Regards,
Peng.
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