diff options
| author | Alban Bedel <alban.bedel@lht.dlh.de> | 2026-03-11 15:31:18 +0100 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> | 2026-03-16 10:05:32 +0100 |
| commit | 84cb463d2f6597c7951da6fb795f12119af8130d (patch) | |
| tree | a900f62114139c9619e5f1403c090887c31ce723 /drivers/gpio | |
| parent | 4071437cd2aac6b9d48f160d46cfb35ecbb11136 (diff) | |
gpio: kempld: Add support for PLD version >= 2.8
Starting with version 2.8 there is a dedicated register to configure
the output level. Read the PLD version in the probe and select the
correct register to use for the set operations.
Signed-off-by: Alban Bedel <alban.bedel@lht.dlh.de>
Link: https://patch.msgid.link/20260311143120.2179347-3-alban.bedel@lht.dlh.de
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-kempld.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/gpio/gpio-kempld.c b/drivers/gpio/gpio-kempld.c index 532e4000879a..2263de77d40e 100644 --- a/drivers/gpio/gpio-kempld.c +++ b/drivers/gpio/gpio-kempld.c @@ -25,6 +25,7 @@ struct kempld_gpio_data { struct gpio_chip chip; struct kempld_device_data *pld; + u8 out_lvl_reg; }; /* @@ -71,7 +72,7 @@ static int kempld_gpio_set(struct gpio_chip *chip, unsigned int offset, struct kempld_device_data *pld = gpio->pld; kempld_get_mutex(pld); - kempld_gpio_bitop(pld, KEMPLD_GPIO_LVL, offset, value); + kempld_gpio_bitop(pld, gpio->out_lvl_reg, offset, value); kempld_release_mutex(pld); return 0; @@ -96,7 +97,7 @@ static int kempld_gpio_direction_output(struct gpio_chip *chip, unsigned offset, struct kempld_device_data *pld = gpio->pld; kempld_get_mutex(pld); - kempld_gpio_bitop(pld, KEMPLD_GPIO_LVL, offset, value); + kempld_gpio_bitop(pld, gpio->out_lvl_reg, offset, value); kempld_gpio_bitop(pld, KEMPLD_GPIO_DIR, offset, 1); kempld_release_mutex(pld); @@ -153,6 +154,15 @@ static int kempld_gpio_probe(struct platform_device *pdev) if (!gpio) return -ENOMEM; + /* Starting with version 2.8 there is a dedicated register for the + * output state, earlier versions share the register used to read + * the line level. + */ + if (pld->info.spec_major > 2 || pld->info.spec_minor >= 8) + gpio->out_lvl_reg = KEMPLD_GPIO_OUT_LVL; + else + gpio->out_lvl_reg = KEMPLD_GPIO_LVL; + gpio->pld = pld; platform_set_drvdata(pdev, gpio); |