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https://github.com/brain-hackers/u-boot-brain
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rockchip: gpio: Implement the get_function() method
Provide this method so that 'gpio status' works fully. It now shows whether a pin is used for input, output or some other function. Signed-off-by: Simon Glass <sjg@chromium.org>
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@ -8,11 +8,16 @@
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*/
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*/
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#include <common.h>
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#include <common.h>
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#include <clk.h>
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#include <dm.h>
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#include <dm.h>
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#include <syscon.h>
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#include <asm/errno.h>
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#include <asm/errno.h>
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#include <asm/gpio.h>
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#include <asm/gpio.h>
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#include <asm/io.h>
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#include <asm/io.h>
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#include <asm/arch/clock.h>
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#include <dm/pinctrl.h>
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/clock/rk3288-cru.h>
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enum {
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enum {
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ROCKCHIP_GPIOS_PER_BANK = 32,
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ROCKCHIP_GPIOS_PER_BANK = 32,
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@ -22,6 +27,8 @@ enum {
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struct rockchip_gpio_priv {
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struct rockchip_gpio_priv {
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struct rockchip_gpio_regs *regs;
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struct rockchip_gpio_regs *regs;
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struct udevice *pinctrl;
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int bank;
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char name[2];
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char name[2];
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};
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};
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@ -70,7 +77,25 @@ static int rockchip_gpio_set_value(struct udevice *dev, unsigned offset,
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static int rockchip_gpio_get_function(struct udevice *dev, unsigned offset)
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static int rockchip_gpio_get_function(struct udevice *dev, unsigned offset)
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{
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{
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return -ENOSYS;
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#ifdef CONFIG_SPL_BUILD
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return -ENODATA;
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#else
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struct rockchip_gpio_priv *priv = dev_get_priv(dev);
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struct rockchip_gpio_regs *regs = priv->regs;
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bool is_output;
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int ret;
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ret = pinctrl_get_gpio_mux(priv->pinctrl, priv->bank, offset);
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if (ret)
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return ret;
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/* If it's not 0, then it is not a GPIO */
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if (ret)
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return GPIOF_FUNC;
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is_output = readl(®s->swport_ddr) & OFFSET_TO_BIT(offset);
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return is_output ? GPIOF_OUTPUT : GPIOF_INPUT;
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#endif
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}
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}
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static int rockchip_gpio_xlate(struct udevice *dev, struct gpio_desc *desc,
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static int rockchip_gpio_xlate(struct udevice *dev, struct gpio_desc *desc,
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@ -87,13 +112,20 @@ static int rockchip_gpio_probe(struct udevice *dev)
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struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
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struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
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struct rockchip_gpio_priv *priv = dev_get_priv(dev);
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struct rockchip_gpio_priv *priv = dev_get_priv(dev);
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char *end;
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char *end;
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int bank;
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int ret;
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/* This only supports RK3288 at present */
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priv->regs = (struct rockchip_gpio_regs *)dev_get_addr(dev);
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priv->regs = (struct rockchip_gpio_regs *)dev_get_addr(dev);
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ret = uclass_first_device(UCLASS_PINCTRL, &priv->pinctrl);
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if (ret)
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return ret;
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if (!priv->pinctrl)
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return -ENODEV;
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uc_priv->gpio_count = ROCKCHIP_GPIOS_PER_BANK;
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uc_priv->gpio_count = ROCKCHIP_GPIOS_PER_BANK;
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end = strrchr(dev->name, '@');
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end = strrchr(dev->name, '@');
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bank = trailing_strtoln(dev->name, end);
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priv->bank = trailing_strtoln(dev->name, end);
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priv->name[0] = 'A' + bank;
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priv->name[0] = 'A' + priv->bank;
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uc_priv->bank_name = priv->name;
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uc_priv->bank_name = priv->name;
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return 0;
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return 0;
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