diff options
Diffstat (limited to 'target/linux/layerscape/patches-4.4/8042-drivers-gpio-Port-gpio-driver-to-support-layerscape-.patch')
| -rw-r--r-- | target/linux/layerscape/patches-4.4/8042-drivers-gpio-Port-gpio-driver-to-support-layerscape-.patch | 289 |
1 files changed, 0 insertions, 289 deletions
diff --git a/target/linux/layerscape/patches-4.4/8042-drivers-gpio-Port-gpio-driver-to-support-layerscape-.patch b/target/linux/layerscape/patches-4.4/8042-drivers-gpio-Port-gpio-driver-to-support-layerscape-.patch deleted file mode 100644 index c857dbe..0000000 --- a/target/linux/layerscape/patches-4.4/8042-drivers-gpio-Port-gpio-driver-to-support-layerscape-.patch +++ /dev/null @@ -1,289 +0,0 @@ -From c2d0a12b5cfa61e43494483f5d1ee466b4998830 Mon Sep 17 00:00:00 2001 -From: Liu Gang <Gang.Liu@nxp.com> -Date: Thu, 14 Jan 2016 19:48:09 +0800 -Subject: [PATCH 42/70] drivers/gpio: Port gpio driver to support layerscape - platform - -Layerscape has the same ip block/controller as -GPIO on powerpc platform(MPC8XXX). - -So use portable i/o accessors, as in_be32/out_be32 -accessors are Power architecture specific whereas -ioread32/iowrite32 and ioread32be/iowrite32be are -available in other architectures. - -Layerscape GPIO controller's registers may be big -or little endian, so the code needs to get the -endian property from DTB, then make additional -functions to fit right register read/write -operations. - -Currently the code can support ls2080a GPIO with -little endian registers. And it can also work well -on other layerscape platform with big endian GPIO -registers. - -Signed-off-by: Liu Gang <Gang.Liu@nxp.com> ---- - drivers/gpio/Kconfig | 7 ++-- - drivers/gpio/gpio-mpc8xxx.c | 87 +++++++++++++++++++++++++++++++------------ - 2 files changed, 68 insertions(+), 26 deletions(-) - ---- a/drivers/gpio/Kconfig -+++ b/drivers/gpio/Kconfig -@@ -282,12 +282,13 @@ config GPIO_MPC5200 - depends on PPC_MPC52xx - - config GPIO_MPC8XXX -- bool "MPC512x/MPC8xxx GPIO support" -+ bool "MPC512x/MPC8xxx/QorIQ GPIO support" - depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \ -- FSL_SOC_BOOKE || PPC_86xx -+ FSL_SOC_BOOKE || PPC_86xx || ARCH_LAYERSCAPE || ARM || \ -+ COMPILE_TEST - help - Say Y here if you're going to use hardware that connects to the -- MPC512x/831x/834x/837x/8572/8610 GPIOs. -+ MPC512x/831x/834x/837x/8572/8610/QorIQ GPIOs. - - config GPIO_MVEBU - def_bool y ---- a/drivers/gpio/gpio-mpc8xxx.c -+++ b/drivers/gpio/gpio-mpc8xxx.c -@@ -1,5 +1,5 @@ - /* -- * GPIOs on MPC512x/8349/8572/8610 and compatible -+ * GPIOs on MPC512x/8349/8572/8610/QorIQ and compatible - * - * Copyright (C) 2008 Peter Korsgaard <jacmet@sunsite.dk> - * -@@ -19,6 +19,7 @@ - #include <linux/gpio.h> - #include <linux/slab.h> - #include <linux/irq.h> -+#include <linux/irqdomain.h> - - #define MPC8XXX_GPIO_PINS 32 - -@@ -44,6 +45,27 @@ struct mpc8xxx_gpio_chip { - const void *of_dev_id_data; - }; - -+static bool gpio_little_endian; -+static inline u32 gpio_in32(void __iomem *addr) -+{ -+ u32 val; -+ -+ if (gpio_little_endian) -+ val = ioread32(addr); -+ else -+ val = ioread32be(addr); -+ -+ return val; -+} -+ -+static inline void gpio_out32(u32 val, void __iomem *addr) -+{ -+ if (gpio_little_endian) -+ iowrite32(val, addr); -+ else -+ iowrite32be(val, addr); -+} -+ - static inline u32 mpc8xxx_gpio2mask(unsigned int gpio) - { - return 1u << (MPC8XXX_GPIO_PINS - 1 - gpio); -@@ -59,9 +81,17 @@ static void mpc8xxx_gpio_save_regs(struc - { - struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm); - -- mpc8xxx_gc->data = in_be32(mm->regs + GPIO_DAT); -+ mpc8xxx_gc->data = gpio_in32(mm->regs + GPIO_DAT); - } - -+/* Generic set and clear bits accessor ports */ -+#define bgpio_setbits32(_addr, _v) \ -+ gpio_out32(gpio_in32(_addr) | (_v), (_addr)) -+#define bgpio_clrbits32(_addr, _v) \ -+ gpio_out32(gpio_in32(_addr) & ~(_v), (_addr)) -+#define bgpio_clrsetbits32(addr, clear, set) \ -+ gpio_out32((gpio_in32(addr) & ~(clear)) | (set), (addr)) -+ - /* Workaround GPIO 1 errata on MPC8572/MPC8536. The status of GPIOs - * defined as output cannot be determined by reading GPDAT register, - * so we use shadow data register instead. The status of input pins -@@ -74,9 +104,9 @@ static int mpc8572_gpio_get(struct gpio_ - struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm); - u32 out_mask, out_shadow; - -- out_mask = in_be32(mm->regs + GPIO_DIR); -+ out_mask = gpio_in32(mm->regs + GPIO_DIR); - -- val = in_be32(mm->regs + GPIO_DAT) & ~out_mask; -+ val = gpio_in32(mm->regs + GPIO_DAT) & ~out_mask; - out_shadow = mpc8xxx_gc->data & out_mask; - - return (val | out_shadow) & mpc8xxx_gpio2mask(gpio); -@@ -86,7 +116,7 @@ static int mpc8xxx_gpio_get(struct gpio_ - { - struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc); - -- return in_be32(mm->regs + GPIO_DAT) & mpc8xxx_gpio2mask(gpio); -+ return gpio_in32(mm->regs + GPIO_DAT) & mpc8xxx_gpio2mask(gpio); - } - - static void mpc8xxx_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val) -@@ -102,7 +132,7 @@ static void mpc8xxx_gpio_set(struct gpio - else - mpc8xxx_gc->data &= ~mpc8xxx_gpio2mask(gpio); - -- out_be32(mm->regs + GPIO_DAT, mpc8xxx_gc->data); -+ gpio_out32(mpc8xxx_gc->data, mm->regs + GPIO_DAT); - - raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags); - } -@@ -128,7 +158,7 @@ static void mpc8xxx_gpio_set_multiple(st - } - } - -- out_be32(mm->regs + GPIO_DAT, mpc8xxx_gc->data); -+ gpio_out32(mpc8xxx_gc->data, mm->regs + GPIO_DAT); - - raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags); - } -@@ -141,7 +171,7 @@ static int mpc8xxx_gpio_dir_in(struct gp - - raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags); - -- clrbits32(mm->regs + GPIO_DIR, mpc8xxx_gpio2mask(gpio)); -+ bgpio_clrbits32(mm->regs + GPIO_DIR, mpc8xxx_gpio2mask(gpio)); - - raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags); - -@@ -158,7 +188,7 @@ static int mpc8xxx_gpio_dir_out(struct g - - raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags); - -- setbits32(mm->regs + GPIO_DIR, mpc8xxx_gpio2mask(gpio)); -+ bgpio_setbits32(mm->regs + GPIO_DIR, mpc8xxx_gpio2mask(gpio)); - - raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags); - -@@ -201,7 +231,8 @@ static void mpc8xxx_gpio_irq_cascade(str - struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc; - unsigned int mask; - -- mask = in_be32(mm->regs + GPIO_IER) & in_be32(mm->regs + GPIO_IMR); -+ mask = gpio_in32(mm->regs + GPIO_IER) -+ & gpio_in32(mm->regs + GPIO_IMR); - if (mask) - generic_handle_irq(irq_linear_revmap(mpc8xxx_gc->irq, - 32 - ffs(mask))); -@@ -217,7 +248,8 @@ static void mpc8xxx_irq_unmask(struct ir - - raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags); - -- setbits32(mm->regs + GPIO_IMR, mpc8xxx_gpio2mask(irqd_to_hwirq(d))); -+ bgpio_setbits32(mm->regs + GPIO_IMR, -+ mpc8xxx_gpio2mask(irqd_to_hwirq(d))); - - raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags); - } -@@ -230,7 +262,8 @@ static void mpc8xxx_irq_mask(struct irq_ - - raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags); - -- clrbits32(mm->regs + GPIO_IMR, mpc8xxx_gpio2mask(irqd_to_hwirq(d))); -+ bgpio_clrbits32(mm->regs + GPIO_IMR, -+ mpc8xxx_gpio2mask(irqd_to_hwirq(d))); - - raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags); - } -@@ -240,7 +273,7 @@ static void mpc8xxx_irq_ack(struct irq_d - struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_data_get_irq_chip_data(d); - struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc; - -- out_be32(mm->regs + GPIO_IER, mpc8xxx_gpio2mask(irqd_to_hwirq(d))); -+ gpio_out32(mpc8xxx_gpio2mask(irqd_to_hwirq(d)), mm->regs + GPIO_IER); - } - - static int mpc8xxx_irq_set_type(struct irq_data *d, unsigned int flow_type) -@@ -252,15 +285,15 @@ static int mpc8xxx_irq_set_type(struct i - switch (flow_type) { - case IRQ_TYPE_EDGE_FALLING: - raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags); -- setbits32(mm->regs + GPIO_ICR, -- mpc8xxx_gpio2mask(irqd_to_hwirq(d))); -+ bgpio_setbits32(mm->regs + GPIO_ICR, -+ mpc8xxx_gpio2mask(irqd_to_hwirq(d))); - raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags); - break; - - case IRQ_TYPE_EDGE_BOTH: - raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags); -- clrbits32(mm->regs + GPIO_ICR, -- mpc8xxx_gpio2mask(irqd_to_hwirq(d))); -+ bgpio_clrbits32(mm->regs + GPIO_ICR, -+ mpc8xxx_gpio2mask(irqd_to_hwirq(d))); - raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags); - break; - -@@ -292,20 +325,20 @@ static int mpc512x_irq_set_type(struct i - case IRQ_TYPE_EDGE_FALLING: - case IRQ_TYPE_LEVEL_LOW: - raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags); -- clrsetbits_be32(reg, 3 << shift, 2 << shift); -+ bgpio_clrsetbits32(reg, 3 << shift, 2 << shift); - raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags); - break; - - case IRQ_TYPE_EDGE_RISING: - case IRQ_TYPE_LEVEL_HIGH: - raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags); -- clrsetbits_be32(reg, 3 << shift, 1 << shift); -+ bgpio_clrsetbits32(reg, 3 << shift, 1 << shift); - raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags); - break; - - case IRQ_TYPE_EDGE_BOTH: - raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags); -- clrbits32(reg, 3 << shift); -+ bgpio_clrbits32(reg, 3 << shift); - raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags); - break; - -@@ -398,6 +431,14 @@ static int mpc8xxx_probe(struct platform - mm_gc = &mpc8xxx_gc->mm_gc; - gc = &mm_gc->gc; - -+ if (of_property_read_bool(np, "little-endian")) { -+ gpio_little_endian = true; -+ dev_dbg(&pdev->dev, "GPIO REGISTERS are LITTLE endian\n"); -+ } else { -+ gpio_little_endian = false; -+ dev_dbg(&pdev->dev, "GPIO REGISTERS are BIG endian\n"); -+ } -+ - mm_gc->save_regs = mpc8xxx_gpio_save_regs; - gc->ngpio = MPC8XXX_GPIO_PINS; - gc->direction_input = mpc8xxx_gpio_dir_in; -@@ -422,7 +463,7 @@ static int mpc8xxx_probe(struct platform - return ret; - - mpc8xxx_gc->irqn = irq_of_parse_and_map(np, 0); -- if (mpc8xxx_gc->irqn == NO_IRQ) -+ if (mpc8xxx_gc->irqn == 0) - return 0; - - mpc8xxx_gc->irq = irq_domain_add_linear(np, MPC8XXX_GPIO_PINS, -@@ -435,8 +476,8 @@ static int mpc8xxx_probe(struct platform - mpc8xxx_gc->of_dev_id_data = id->data; - - /* ack and mask all irqs */ -- out_be32(mm_gc->regs + GPIO_IER, 0xffffffff); -- out_be32(mm_gc->regs + GPIO_IMR, 0); -+ gpio_out32(0xffffffff, mm_gc->regs + GPIO_IER); -+ gpio_out32(0, mm_gc->regs + GPIO_IMR); - - irq_set_chained_handler_and_data(mpc8xxx_gc->irqn, - mpc8xxx_gpio_irq_cascade, mpc8xxx_gc); |