[PATCH 01/11] ARM/gpio: ep93xx: build standalone
From: Linus Walleij <hidden>
Date: 2018-08-22 20:41:01
Also in:
linux-gpio
Subsystem:
arm port, arm/cirrus logic ep93xx arm architecture, gpio subsystem, the rest · Maintainers:
Russell King, Hartley Sweeten, Alexander Sverdlin, Nikita Shubin, Linus Walleij, Bartosz Golaszewski, Linus Torvalds
From: Arnd Bergmann <arnd@arndb.de> As a preparation for multiplatform support, this ensures that the ep93xx gpio driver can be built without any of the platform specific header files. We pass the IRQ numbers as a resource now, and use the virtual mmio base from the already existing resource, rather than relying on the hardwired virtual address from the header file. Some numbers are now hardcoded that came from macros in the past, but for all I can tell, the driver already relied on the specific values. Cc: arm at kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Walleij <redacted> --- Arnd/other ARM SoC person: Please provide an ACK for this patch so I can merge it with the rest of the refactorings into the GPIO tree. --- arch/arm/mach-ep93xx/core.c | 9 +++++++ drivers/gpio/gpio-ep93xx.c | 48 ++++++++++++++++++------------------- 2 files changed, 32 insertions(+), 25 deletions(-)
diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index 574dfdc527ed..b82b632789f7 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c@@ -141,6 +141,15 @@ EXPORT_SYMBOL_GPL(ep93xx_chip_revision); *************************************************************************/ static struct resource ep93xx_gpio_resource[] = { DEFINE_RES_MEM(EP93XX_GPIO_PHYS_BASE, 0xcc), + DEFINE_RES_IRQ(IRQ_EP93XX_GPIO_AB), + DEFINE_RES_IRQ(IRQ_EP93XX_GPIO0MUX), + DEFINE_RES_IRQ(IRQ_EP93XX_GPIO1MUX), + DEFINE_RES_IRQ(IRQ_EP93XX_GPIO2MUX), + DEFINE_RES_IRQ(IRQ_EP93XX_GPIO3MUX), + DEFINE_RES_IRQ(IRQ_EP93XX_GPIO4MUX), + DEFINE_RES_IRQ(IRQ_EP93XX_GPIO5MUX), + DEFINE_RES_IRQ(IRQ_EP93XX_GPIO6MUX), + DEFINE_RES_IRQ(IRQ_EP93XX_GPIO7MUX), }; static struct platform_device ep93xx_gpio_device = {
diff --git a/drivers/gpio/gpio-ep93xx.c b/drivers/gpio/gpio-ep93xx.c
index 45d384039e9b..654525d6a9f1 100644
--- a/drivers/gpio/gpio-ep93xx.c
+++ b/drivers/gpio/gpio-ep93xx.c@@ -22,11 +22,20 @@ /* FIXME: this is here for gpio_to_irq() - get rid of this! */ #include <linux/gpio.h> -#include <mach/hardware.h> -#include <mach/gpio-ep93xx.h> - #define irq_to_gpio(irq) ((irq) - gpio_to_irq(0)) +void __iomem *ep93xx_gpio_base; /* FIXME: put this into irq_data */ +#define EP93XX_GPIO_REG(x) (ep93xx_gpio_base + (x)) +#define EP93XX_GPIO_F_INT_STATUS EP93XX_GPIO_REG(0x5c) +#define EP93XX_GPIO_A_INT_STATUS EP93XX_GPIO_REG(0xa0) +#define EP93XX_GPIO_B_INT_STATUS EP93XX_GPIO_REG(0xbc) + +/* Maximum value for gpio line identifiers */ +#define EP93XX_GPIO_LINE_MAX 63 + +/* Maximum value for irq capable line identifiers */ +#define EP93XX_GPIO_LINE_MAX_IRQ 23 + struct ep93xx_gpio { void __iomem *mmio_base; struct gpio_chip gc[8];
@@ -87,7 +96,7 @@ static void ep93xx_gpio_ab_irq_handler(struct irq_desc *desc) status = readb(EP93XX_GPIO_A_INT_STATUS); for (i = 0; i < 8; i++) { if (status & (1 << i)) { - int gpio_irq = gpio_to_irq(EP93XX_GPIO_LINE_A(0)) + i; + int gpio_irq = gpio_to_irq(0) + i; generic_handle_irq(gpio_irq); } }
@@ -95,7 +104,7 @@ static void ep93xx_gpio_ab_irq_handler(struct irq_desc *desc) status = readb(EP93XX_GPIO_B_INT_STATUS); for (i = 0; i < 8; i++) { if (status & (1 << i)) { - int gpio_irq = gpio_to_irq(EP93XX_GPIO_LINE_B(0)) + i; + int gpio_irq = gpio_to_irq(8) + i; generic_handle_irq(gpio_irq); } }
@@ -110,7 +119,7 @@ static void ep93xx_gpio_f_irq_handler(struct irq_desc *desc) */ unsigned int irq = irq_desc_get_irq(desc); int port_f_idx = ((irq + 1) & 7) ^ 4; /* {19..22,47..50} -> {0..7} */ - int gpio_irq = gpio_to_irq(EP93XX_GPIO_LINE_F(0)) + port_f_idx; + int gpio_irq = gpio_to_irq(16) + port_f_idx; generic_handle_irq(gpio_irq); }
@@ -228,9 +237,10 @@ static struct irq_chip ep93xx_gpio_irq_chip = { .irq_set_type = ep93xx_gpio_irq_type, }; -static void ep93xx_gpio_init_irq(void) +static void ep93xx_gpio_init_irq(struct platform_device *pdev) { int gpio_irq; + int i; for (gpio_irq = gpio_to_irq(0); gpio_irq <= gpio_to_irq(EP93XX_GPIO_LINE_MAX_IRQ); ++gpio_irq) {
@@ -239,24 +249,11 @@ static void ep93xx_gpio_init_irq(void) irq_clear_status_flags(gpio_irq, IRQ_NOREQUEST); } - irq_set_chained_handler(IRQ_EP93XX_GPIO_AB, + irq_set_chained_handler(platform_get_irq(pdev, 0), ep93xx_gpio_ab_irq_handler); - irq_set_chained_handler(IRQ_EP93XX_GPIO0MUX, - ep93xx_gpio_f_irq_handler); - irq_set_chained_handler(IRQ_EP93XX_GPIO1MUX, - ep93xx_gpio_f_irq_handler); - irq_set_chained_handler(IRQ_EP93XX_GPIO2MUX, - ep93xx_gpio_f_irq_handler); - irq_set_chained_handler(IRQ_EP93XX_GPIO3MUX, - ep93xx_gpio_f_irq_handler); - irq_set_chained_handler(IRQ_EP93XX_GPIO4MUX, - ep93xx_gpio_f_irq_handler); - irq_set_chained_handler(IRQ_EP93XX_GPIO5MUX, - ep93xx_gpio_f_irq_handler); - irq_set_chained_handler(IRQ_EP93XX_GPIO6MUX, - ep93xx_gpio_f_irq_handler); - irq_set_chained_handler(IRQ_EP93XX_GPIO7MUX, - ep93xx_gpio_f_irq_handler); + for (i = 1; i <= 8; i++) + irq_set_chained_handler(platform_get_irq(pdev, i), + ep93xx_gpio_f_irq_handler); }
@@ -362,6 +359,7 @@ static int ep93xx_gpio_probe(struct platform_device *pdev) ep93xx_gpio->mmio_base = devm_ioremap_resource(dev, res); if (IS_ERR(ep93xx_gpio->mmio_base)) return PTR_ERR(ep93xx_gpio->mmio_base); + ep93xx_gpio_base = ep93xx_gpio->mmio_base; for (i = 0; i < ARRAY_SIZE(ep93xx_gpio_banks); i++) { struct gpio_chip *gc = &ep93xx_gpio->gc[i];
@@ -373,7 +371,7 @@ static int ep93xx_gpio_probe(struct platform_device *pdev) bank->label); } - ep93xx_gpio_init_irq(); + ep93xx_gpio_init_irq(pdev); return 0; }
--
2.17.1