[PATCH v2 1/5] spi/omap: Remove bus_num usage for instance index
Shubhrajyoti
shubhrajyoti at ti.com
Wed Feb 29 07:35:57 EST 2012
On Wednesday 29 February 2012 03:49 AM, Benoit Cousson wrote:
> bus_num was used to reference the mcspi controller instance in a fixed array.
> Remove this array and store this information directly inside drvdata structure.
>
Good change thanks.
If you want add my Reviewed-by
> bus_num is now just set if the pdev->id is present or with -1 for dynamic
> allocation by SPI core, but the driver does not access it anymore.
>
> Clean some bad comments format, and remove un-needed space.
>
> Signed-off-by: Benoit Cousson <b-cousson at ti.com>
> ---
> drivers/spi/spi-omap2-mcspi.c | 72 +++++++++++++++++++---------------------
> 1 files changed, 34 insertions(+), 38 deletions(-)
>
> diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c
> index 0b0dfb7..e034164 100644
> --- a/drivers/spi/spi-omap2-mcspi.c
> +++ b/drivers/spi/spi-omap2-mcspi.c
> @@ -109,6 +109,16 @@ struct omap2_mcspi_dma {
> #define DMA_MIN_BYTES 160
>
>
> +/*
> + * Used for context save and restore, structure members to be updated whenever
> + * corresponding registers are modified.
> + */
> +struct omap2_mcspi_regs {
> + u32 modulctrl;
> + u32 wakeupenable;
> + struct list_head cs;
> +};
> +
> struct omap2_mcspi {
> struct work_struct work;
> /* lock protects queue and registers */
> @@ -120,8 +130,9 @@ struct omap2_mcspi {
> unsigned long phys;
> /* SPI1 has 4 channels, while SPI2 has 2 */
> struct omap2_mcspi_dma *dma_channels;
> - struct device *dev;
> + struct device *dev;
> struct workqueue_struct *wq;
> + struct omap2_mcspi_regs ctx;
> };
>
> struct omap2_mcspi_cs {
> @@ -133,17 +144,6 @@ struct omap2_mcspi_cs {
> u32 chconf0;
> };
>
> -/* used for context save and restore, structure members to be updated whenever
> - * corresponding registers are modified.
> - */
> -struct omap2_mcspi_regs {
> - u32 modulctrl;
> - u32 wakeupenable;
> - struct list_head cs;
> -};
> -
> -static struct omap2_mcspi_regs omap2_mcspi_ctx[OMAP2_MCSPI_MAX_CTRL];
> -
> #define MOD_REG_BIT(val, mask, set) do { \
> if (set) \
> val |= mask; \
> @@ -234,9 +234,12 @@ static void omap2_mcspi_force_cs(struct spi_device *spi, int cs_active)
>
> static void omap2_mcspi_set_master_mode(struct spi_master *master)
> {
> + struct omap2_mcspi *mcspi = spi_master_get_devdata(master);
> + struct omap2_mcspi_regs *ctx = &mcspi->ctx;
> u32 l;
>
> - /* setup when switching from (reset default) slave mode
> + /*
> + * Setup when switching from (reset default) slave mode
> * to single-channel master mode
> */
> l = mcspi_read_reg(master, OMAP2_MCSPI_MODULCTRL);
> @@ -245,24 +248,20 @@ static void omap2_mcspi_set_master_mode(struct spi_master *master)
> MOD_REG_BIT(l, OMAP2_MCSPI_MODULCTRL_SINGLE, 1);
> mcspi_write_reg(master, OMAP2_MCSPI_MODULCTRL, l);
>
> - omap2_mcspi_ctx[master->bus_num - 1].modulctrl = l;
> + ctx->modulctrl = l;
> }
>
> static void omap2_mcspi_restore_ctx(struct omap2_mcspi *mcspi)
> {
> - struct spi_master *spi_cntrl;
> - struct omap2_mcspi_cs *cs;
> - spi_cntrl = mcspi->master;
> + struct spi_master *spi_cntrl = mcspi->master;
> + struct omap2_mcspi_regs *ctx = &mcspi->ctx;
> + struct omap2_mcspi_cs *cs;
>
> /* McSPI: context restore */
> - mcspi_write_reg(spi_cntrl, OMAP2_MCSPI_MODULCTRL,
> - omap2_mcspi_ctx[spi_cntrl->bus_num - 1].modulctrl);
> -
> - mcspi_write_reg(spi_cntrl, OMAP2_MCSPI_WAKEUPENABLE,
> - omap2_mcspi_ctx[spi_cntrl->bus_num - 1].wakeupenable);
> + mcspi_write_reg(spi_cntrl, OMAP2_MCSPI_MODULCTRL, ctx->modulctrl);
> + mcspi_write_reg(spi_cntrl, OMAP2_MCSPI_WAKEUPENABLE, ctx->wakeupenable);
>
> - list_for_each_entry(cs, &omap2_mcspi_ctx[spi_cntrl->bus_num - 1].cs,
> - node)
> + list_for_each_entry(cs, &ctx->cs, node)
> __raw_writel(cs->chconf0, cs->base + OMAP2_MCSPI_CHCONF0);
> }
> static void omap2_mcspi_disable_clocks(struct omap2_mcspi *mcspi)
> @@ -775,7 +774,8 @@ static int omap2_mcspi_request_dma(struct spi_device *spi)
> static int omap2_mcspi_setup(struct spi_device *spi)
> {
> int ret;
> - struct omap2_mcspi *mcspi;
> + struct omap2_mcspi *mcspi = spi_master_get_devdata(spi->master);
> + struct omap2_mcspi_regs *ctx = &mcspi->ctx;
> struct omap2_mcspi_dma *mcspi_dma;
> struct omap2_mcspi_cs *cs = spi->controller_state;
>
> @@ -785,7 +785,6 @@ static int omap2_mcspi_setup(struct spi_device *spi)
> return -EINVAL;
> }
>
> - mcspi = spi_master_get_devdata(spi->master);
> mcspi_dma = &mcspi->dma_channels[spi->chip_select];
>
> if (!cs) {
> @@ -797,8 +796,7 @@ static int omap2_mcspi_setup(struct spi_device *spi)
> cs->chconf0 = 0;
> spi->controller_state = cs;
> /* Link this to context save list */
> - list_add_tail(&cs->node,
> - &omap2_mcspi_ctx[mcspi->master->bus_num - 1].cs);
> + list_add_tail(&cs->node, &ctx->cs);
> }
>
> if (mcspi_dma->dma_rx_channel == -1
> @@ -1051,8 +1049,9 @@ static int omap2_mcspi_transfer(struct spi_device *spi, struct spi_message *m)
> static int __init omap2_mcspi_master_setup(struct omap2_mcspi *mcspi)
> {
> struct spi_master *master = mcspi->master;
> + struct omap2_mcspi_regs *ctx = &mcspi->ctx;
> u32 tmp;
> - int ret = 0;
> + int ret = 0;
>
> ret = omap2_mcspi_enable_clocks(mcspi);
> if (ret < 0)
> @@ -1060,7 +1059,7 @@ static int __init omap2_mcspi_master_setup(struct omap2_mcspi *mcspi)
>
> tmp = OMAP2_MCSPI_WAKEUPENABLE_WKEN;
> mcspi_write_reg(master, OMAP2_MCSPI_WAKEUPENABLE, tmp);
> - omap2_mcspi_ctx[master->bus_num - 1].wakeupenable = tmp;
> + ctx->wakeupenable = tmp;
>
> omap2_mcspi_set_master_mode(master);
> omap2_mcspi_disable_clocks(mcspi);
> @@ -1087,7 +1086,6 @@ static int __init omap2_mcspi_probe(struct platform_device *pdev)
> struct omap2_mcspi *mcspi;
> struct resource *r;
> int status = 0, i;
> - char wq_name[20];
>
> master = spi_alloc_master(&pdev->dev, sizeof *mcspi);
> if (master == NULL) {
> @@ -1111,8 +1109,7 @@ static int __init omap2_mcspi_probe(struct platform_device *pdev)
> mcspi = spi_master_get_devdata(master);
> mcspi->master = master;
>
> - sprintf(wq_name, "omap2_mcspi/%d", master->bus_num);
> - mcspi->wq = alloc_workqueue(wq_name, WQ_MEM_RECLAIM, 1);
> + mcspi->wq = alloc_workqueue(dev_name(&pdev->dev), WQ_MEM_RECLAIM, 1);
> if (mcspi->wq == NULL) {
> status = -ENOMEM;
> goto free_master;
> @@ -1145,7 +1142,7 @@ static int __init omap2_mcspi_probe(struct platform_device *pdev)
>
> spin_lock_init(&mcspi->lock);
> INIT_LIST_HEAD(&mcspi->msg_queue);
> - INIT_LIST_HEAD(&omap2_mcspi_ctx[master->bus_num - 1].cs);
> + INIT_LIST_HEAD(&mcspi->ctx.cs);
>
> mcspi->dma_channels = kcalloc(master->num_chipselect,
> sizeof(struct omap2_mcspi_dma),
> @@ -1252,13 +1249,12 @@ static int omap2_mcspi_resume(struct device *dev)
> {
> struct spi_master *master = dev_get_drvdata(dev);
> struct omap2_mcspi *mcspi = spi_master_get_devdata(master);
> - struct omap2_mcspi_cs *cs;
> + struct omap2_mcspi_regs *ctx = &mcspi->ctx;
> + struct omap2_mcspi_cs *cs;
>
> omap2_mcspi_enable_clocks(mcspi);
> - list_for_each_entry(cs, &omap2_mcspi_ctx[master->bus_num - 1].cs,
> - node) {
> + list_for_each_entry(cs, &ctx->cs, node) {
> if ((cs->chconf0 & OMAP2_MCSPI_CHCONF_FORCE) == 0) {
> -
> /*
> * We need to toggle CS state for OMAP take this
> * change in account.
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