Tarun Kanti DebBarma <tarun.kanti@xxxxxx> writes:
> With register offsets now defined for respective OMAP versions we can get rid
> of cpu_class_* checks. This function now has common initialization code for
> all OMAP versions. Initialization specific to OMAP16xx has been moved within
> omap16xx_gpio_init().
This patch also adds the ->do_raw_write() stuff which is not described
here, and is an unrelated change that wants its own patch. More on that
below.
> Signed-off-by: Tarun Kanti DebBarma <tarun.kanti@xxxxxx>
> Signed-off-by: Charulatha V <charu@xxxxxx>
> ---
> arch/arm/mach-omap1/gpio16xx.c | 19 ++++++-
> arch/arm/plat-omap/include/plat/gpio.h | 2 +
> drivers/gpio/gpio-omap.c | 96 +++++++++++++++-----------------
> 3 files changed, 64 insertions(+), 53 deletions(-)
>
> diff --git a/arch/arm/mach-omap1/gpio16xx.c b/arch/arm/mach-omap1/gpio16xx.c
> index 08dda3c..cfd86b9 100644
> --- a/arch/arm/mach-omap1/gpio16xx.c
> +++ b/arch/arm/mach-omap1/gpio16xx.c
> @@ -93,6 +93,7 @@ static struct omap_gpio_reg_offs omap16xx_gpio_regs = {
> .wkup_status = OMAP1610_GPIO_WAKEUPENABLE,
> .edgectrl1 = OMAP1610_GPIO_EDGE_CTRL1,
> .edgectrl2 = OMAP1610_GPIO_EDGE_CTRL2,
> + .sysconfig = OMAP1610_GPIO_SYSCONFIG,
> };
>
> static struct __initdata omap_gpio_platform_data omap16xx_gpio1_config = {
> @@ -218,12 +219,28 @@ static struct __initdata platform_device * omap16xx_gpio_dev[] = {
> static int __init omap16xx_gpio_init(void)
> {
> int i;
> + void __iomem *base;
> + struct resource *res;
> + struct platform_device *pdev;
> + struct omap_gpio_platform_data *pdata;
>
> if (!cpu_is_omap16xx())
> return -EINVAL;
>
> - for (i = 0; i < ARRAY_SIZE(omap16xx_gpio_dev); i++)
> + for (i = 0; i < ARRAY_SIZE(omap16xx_gpio_dev); i++) {
> + pdev = omap16xx_gpio_dev[i];
> + pdata = pdev->dev.platform_data;
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + base = ioremap(res->start, resource_size(res));
> +
> + if (pdata->regs->sysconfig)
using field from regs-> here...
> + __raw_writew(0x0014, base + OMAP1610_GPIO_SYSCONFIG);
but the #define here.
Since you don't really need this field in reg_offs (because it's not
used in SoC-independent code), just drop the if and always write
sysconfig.
> + omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04,
> + ULPD_CAM_CLK_CTRL);
Please preserve the comments from the original code, since the CAM
access does lok rather confusing.
> platform_device_register(omap16xx_gpio_dev[i]);
> + }
>
> return 0;
> }
> diff --git a/arch/arm/plat-omap/include/plat/gpio.h b/arch/arm/plat-omap/include/plat/gpio.h
> index 4f584de..3f7b028 100644
> --- a/arch/arm/plat-omap/include/plat/gpio.h
> +++ b/arch/arm/plat-omap/include/plat/gpio.h
> @@ -198,6 +198,8 @@ struct omap_gpio_reg_offs {
> u16 irqctrl;
> u16 edgectrl1;
> u16 edgectrl2;
> + /* Not applicable for OMAP2+ as hwmod layer takes care of sysconfig */
> + u16 sysconfig;
>
> bool irqenable_inv;
> };
> diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
> index 769fae7..3acbaa9 100644
> --- a/drivers/gpio/gpio-omap.c
> +++ b/drivers/gpio/gpio-omap.c
> @@ -75,6 +75,7 @@ struct gpio_bank {
>
> void (*set_dataout)(struct gpio_bank *bank, int gpio, int enable);
> int (*get_context_loss_count)(struct device *dev);
> + void (*do_raw_write)(void __iomem *reg, int set);
>
> struct omap_gpio_reg_offs *regs;
> };
> @@ -864,67 +865,53 @@ static void __init omap_gpio_show_rev(struct gpio_bank *bank)
> called = true;
> }
>
> +static void __do_raw_writel(void __iomem *reg, int set)
> +{
> + if (set)
> + __raw_writel(0xffffffff, reg);
> + else
> + __raw_writel(0x00000000, reg);
> +
> +}
> +
> +static void __do_raw_writew(void __iomem *reg, int set)
> +{
> + if (set)
> + __raw_writew(0xffff, reg);
> + else
> + __raw_writew(0x0000, reg);
> +}
> +
> /* This lock class tells lockdep that GPIO irqs are in a different
> * category than their parents, so it won't report false recursion.
> */
> static struct lock_class_key gpio_lock_class;
>
> -/* TODO: Cleanup cpu_is_* checks */
> static void omap_gpio_mod_init(struct gpio_bank *bank)
> {
> - if (cpu_class_is_omap2()) {
> - if (cpu_is_omap44xx()) {
> - __raw_writel(0xffffffff, bank->base +
> - OMAP4_GPIO_IRQSTATUSCLR0);
> - __raw_writel(0x00000000, bank->base +
> - OMAP4_GPIO_DEBOUNCENABLE);
> - /* Initialize interface clk ungated, module enabled */
> - __raw_writel(0, bank->base + OMAP4_GPIO_CTRL);
> - } else if (cpu_is_omap34xx()) {
> - __raw_writel(0x00000000, bank->base +
> - OMAP24XX_GPIO_IRQENABLE1);
> - __raw_writel(0xffffffff, bank->base +
> - OMAP24XX_GPIO_IRQSTATUS1);
> - __raw_writel(0x00000000, bank->base +
> - OMAP24XX_GPIO_DEBOUNCE_EN);
> -
> - /* Initialize interface clk ungated, module enabled */
> - __raw_writel(0, bank->base + OMAP24XX_GPIO_CTRL);
> - }
> - } else if (cpu_class_is_omap1()) {
> - if (bank_is_mpuio(bank)) {
> - __raw_writew(0xffff, bank->base +
> - OMAP_MPUIO_GPIO_MASKIT / bank->stride);
> + if (bank_is_mpuio(bank)) {
> + bank->do_raw_write(bank->base + bank->regs->irqenable, 1);
> + if (bank->regs->wkup_status)
> mpuio_init(bank);
> - }
> - if (cpu_is_omap15xx() && bank->method == METHOD_GPIO_1510) {
> - __raw_writew(0xffff, bank->base
> - + OMAP1510_GPIO_INT_MASK);
> - __raw_writew(0x0000, bank->base
> - + OMAP1510_GPIO_INT_STATUS);
> - }
> - if (cpu_is_omap16xx() && bank->method == METHOD_GPIO_1610) {
> - __raw_writew(0x0000, bank->base
> - + OMAP1610_GPIO_IRQENABLE1);
> - __raw_writew(0xffff, bank->base
> - + OMAP1610_GPIO_IRQSTATUS1);
> - __raw_writew(0x0014, bank->base
> - + OMAP1610_GPIO_SYSCONFIG);
> -
> - /*
> - * Enable system clock for GPIO module.
> - * The CAM_CLK_CTRL *is* really the right place.
> - */
> - omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04,
> - ULPD_CAM_CLK_CTRL);
> - }
> - if (cpu_is_omap7xx() && bank->method == METHOD_GPIO_7XX) {
> - __raw_writel(0xffffffff, bank->base
> - + OMAP7XX_GPIO_INT_MASK);
> - __raw_writel(0x00000000, bank->base
> - + OMAP7XX_GPIO_INT_STATUS);
> - }
> + return;
> }
> +
> + if (bank->regs->ctrl)
> + /* Initialize interface clk ungated, module enabled */
> + bank->do_raw_write(bank->base + bank->regs->ctrl, 0);
> +
> + if (bank->regs->clr_irqenable && bank->width == 32)
> + bank->do_raw_write(bank->base + bank->regs->clr_irqenable, 1);
> + else if (bank->regs->irqenable)
> + bank->do_raw_write(bank->base + bank->regs->irqenable,
> + bank->regs->irqenable_inv);
> +
> + if (bank->regs->irqstatus)
> + bank->do_raw_write(bank->base + bank->regs->irqstatus,
> + bank->regs->irqenable_inv == 0);
> +
> + if (bank->regs->debounce_en)
> + bank->do_raw_write(bank->base + bank->regs->debounce_en, 0);
> }
>
> static __init void
> @@ -1041,6 +1028,11 @@ static int __devinit omap_gpio_probe(struct platform_device *pdev)
> bank->get_context_loss_count = pdata->get_context_loss_count;
> bank->regs = pdata->regs;
>
> + if (bank->width == 32)
> + bank->do_raw_write = __do_raw_writel;
> + else
> + bank->do_raw_write = __do_raw_writew;
> +
> if (bank->regs->set_dataout && bank->regs->clr_dataout)
> bank->set_dataout = _set_gpio_dataout_reg;
> else
Actually, I think this driver should just be converted so *all* access
are 4-byte accesses.
Current code already uses a mix of readw and readl for register access
OMAP1, so let's just drop all the readw and use readl throughout. All
registers on OMAP1 are 4-byte aligned.
Kevin
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