From: Patrick Delaunay <patrick.delaunay@st.com>
To: u-boot@lists.denx.de
Subject: [PATCH v2 04/11] gpio: stm32: add ops get_dir_flags
Date: Thu, 4 Jun 2020 14:30:26 +0200 [thread overview]
Message-ID: <20200604143022.v2.4.I10d17ebccc888338f2b9f23a803aee50c0f8e089@changeid> (raw)
In-Reply-To: <20200604123033.25499-1-patrick.delaunay@st.com>
Add ops get_dir_flags() to read dir flags from GPIO registers.
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
---
Changes in v2: None
drivers/gpio/stm32_gpio.c | 59 +++++++++++++++++++++++++++++++++++++++
1 file changed, 59 insertions(+)
diff --git a/drivers/gpio/stm32_gpio.c b/drivers/gpio/stm32_gpio.c
index f120ee9808..5bff27f75b 100644
--- a/drivers/gpio/stm32_gpio.c
+++ b/drivers/gpio/stm32_gpio.c
@@ -41,6 +41,11 @@ static void stm32_gpio_set_moder(struct stm32_gpio_regs *regs,
clrsetbits_le32(®s->moder, mask, mode << bits_index);
}
+static int stm32_gpio_get_moder(struct stm32_gpio_regs *regs, int idx)
+{
+ return (readl(®s->moder) >> MODE_BITS(idx)) & MODE_BITS_MASK;
+}
+
static void stm32_gpio_set_otype(struct stm32_gpio_regs *regs,
int idx,
enum stm32_gpio_otype otype)
@@ -51,6 +56,12 @@ static void stm32_gpio_set_otype(struct stm32_gpio_regs *regs,
clrsetbits_le32(®s->otyper, OTYPE_MSK << bits, otype << bits);
}
+static enum stm32_gpio_otype stm32_gpio_get_otype(struct stm32_gpio_regs *regs,
+ int idx)
+{
+ return (readl(®s->otyper) >> OTYPE_BITS(idx)) & OTYPE_MSK;
+}
+
static void stm32_gpio_set_pupd(struct stm32_gpio_regs *regs,
int idx,
enum stm32_gpio_pupd pupd)
@@ -61,6 +72,12 @@ static void stm32_gpio_set_pupd(struct stm32_gpio_regs *regs,
clrsetbits_le32(®s->pupdr, PUPD_MASK << bits, pupd << bits);
}
+static enum stm32_gpio_pupd stm32_gpio_get_pupd(struct stm32_gpio_regs *regs,
+ int idx)
+{
+ return (readl(®s->pupdr) >> PUPD_BITS(idx)) & PUPD_MASK;
+}
+
/*
* convert gpio offset to gpio index taking into account gpio holes
* into gpio bank
@@ -202,6 +219,47 @@ static int stm32_gpio_set_dir_flags(struct udevice *dev, unsigned int offset,
return 0;
}
+static int stm32_gpio_get_dir_flags(struct udevice *dev, unsigned int offset,
+ ulong *flags)
+{
+ struct stm32_gpio_priv *priv = dev_get_priv(dev);
+ struct stm32_gpio_regs *regs = priv->regs;
+ int idx;
+ ulong dir_flags = 0;
+
+ idx = stm32_offset_to_index(dev, offset);
+ if (idx < 0)
+ return idx;
+
+ switch (stm32_gpio_get_moder(regs, idx)) {
+ case STM32_GPIO_MODE_OUT:
+ dir_flags |= GPIOD_IS_OUT;
+ if (stm32_gpio_get_otype(regs, idx) == STM32_GPIO_OTYPE_OD)
+ dir_flags |= GPIOD_OPEN_DRAIN;
+ if (readl(®s->idr) & BIT(idx))
+ dir_flags |= GPIOD_IS_OUT_ACTIVE;
+ break;
+ case STM32_GPIO_MODE_IN:
+ dir_flags |= GPIOD_IS_IN;
+ switch (stm32_gpio_get_pupd(regs, idx)) {
+ case STM32_GPIO_PUPD_UP:
+ dir_flags |= GPIOD_PULL_UP;
+ break;
+ case STM32_GPIO_PUPD_DOWN:
+ dir_flags |= GPIOD_PULL_DOWN;
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+ *flags = dir_flags;
+
+ return 0;
+}
+
static const struct dm_gpio_ops gpio_stm32_ops = {
.direction_input = stm32_gpio_direction_input,
.direction_output = stm32_gpio_direction_output,
@@ -209,6 +267,7 @@ static const struct dm_gpio_ops gpio_stm32_ops = {
.set_value = stm32_gpio_set_value,
.get_function = stm32_gpio_get_function,
.set_dir_flags = stm32_gpio_set_dir_flags,
+ .get_dir_flags = stm32_gpio_get_dir_flags,
};
static int gpio_stm32_probe(struct udevice *dev)
--
2.17.1
next prev parent reply other threads:[~2020-06-04 12:30 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-04 12:30 [PATCH v2 00/11] stm32mp1: activate gpio hog support and add new pinctrl ops Patrick Delaunay
2020-06-04 12:30 ` [PATCH v2 01/11] configs: stm32mp1: activate CONFIG_GPIO_HOG Patrick Delaunay
2020-07-02 7:41 ` [Uboot-stm32] " Patrice CHOTARD
2020-06-04 12:30 ` [PATCH v2 02/11] board: stm32mp1: update the gpio hog support Patrick Delaunay
2020-07-02 7:42 ` [Uboot-stm32] " Patrice CHOTARD
2020-06-04 12:30 ` [PATCH v2 03/11] gpio: stm32: add ops set_dir_flags Patrick Delaunay
2020-07-02 7:48 ` Patrice CHOTARD
2020-06-04 12:30 ` Patrick Delaunay [this message]
2020-07-02 7:51 ` [PATCH v2 04/11] gpio: stm32: add ops get_dir_flags Patrice CHOTARD
2020-06-04 12:30 ` [PATCH v2 05/11] gpio: stmfx: move function to prepare new ops introduction Patrick Delaunay
2020-07-02 7:51 ` Patrice CHOTARD
2020-06-04 12:30 ` [PATCH v2 06/11] gpio: stmfx: rename function used to change pin configuration Patrick Delaunay
2020-07-02 7:51 ` Patrice CHOTARD
2020-06-04 12:30 ` [PATCH v2 07/11] gpio: stmfx: add function stmfx_read_reg and stmfx_write_reg Patrick Delaunay
2020-07-02 7:56 ` Patrice CHOTARD
2020-06-04 12:30 ` [PATCH v2 08/11] gpio: stmfx: add ops set_dir_flag Patrick Delaunay
2020-07-02 7:58 ` Patrice CHOTARD
2020-06-04 12:30 ` [PATCH v2 09/11] gpio: stmfx: add ops get_dir_flags Patrick Delaunay
2020-07-02 7:58 ` Patrice CHOTARD
2020-06-04 12:30 ` [PATCH v2 10/11] pinctrl: stmfx: add information on pin configuration Patrick Delaunay
2020-07-02 7:59 ` Patrice CHOTARD
2020-06-04 12:30 ` [PATCH v2 11/11] pinctrl: stm32: " Patrick Delaunay
2020-07-02 8:02 ` Patrice CHOTARD
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