diff options
Diffstat (limited to 'drivers/pinctrl/stm32/pinctrl-stm32.c')
| -rw-r--r-- | drivers/pinctrl/stm32/pinctrl-stm32.c | 81 |
1 files changed, 41 insertions, 40 deletions
diff --git a/drivers/pinctrl/stm32/pinctrl-stm32.c b/drivers/pinctrl/stm32/pinctrl-stm32.c index 5b7fa77c1184..cc0b4d1d7cff 100644 --- a/drivers/pinctrl/stm32/pinctrl-stm32.c +++ b/drivers/pinctrl/stm32/pinctrl-stm32.c @@ -22,6 +22,7 @@ #include <linux/reset.h> #include <linux/seq_file.h> #include <linux/slab.h> +#include <linux/string_choices.h> #include <linux/pinctrl/consumer.h> #include <linux/pinctrl/machine.h> @@ -86,7 +87,6 @@ struct stm32_pinctrl_group { struct stm32_gpio_bank { void __iomem *base; - struct clk *clk; struct reset_control *rstc; spinlock_t lock; struct gpio_chip gpio_chip; @@ -108,6 +108,7 @@ struct stm32_pinctrl { unsigned ngroups; const char **grp_names; struct stm32_gpio_bank *banks; + struct clk_bulk_data *clks; unsigned nbanks; const struct stm32_pinctrl_match_data *match_data; struct irq_domain *domain; @@ -1217,7 +1218,7 @@ static void stm32_pconf_dbg_show(struct pinctrl_dev *pctldev, case 0: val = stm32_pconf_get(bank, offset, true); seq_printf(s, "- %s - %s", - val ? "high" : "low", + str_high_low(val), biasing[bias]); break; @@ -1227,7 +1228,7 @@ static void stm32_pconf_dbg_show(struct pinctrl_dev *pctldev, speed = stm32_pconf_get_speed(bank, offset); val = stm32_pconf_get(bank, offset, false); seq_printf(s, "- %s - %s - %s - %s %s", - val ? "high" : "low", + str_high_low(val), drive ? "open drain" : "push pull", biasing[bias], speeds[speed], "speed"); @@ -1308,12 +1309,6 @@ static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl, struct fwnode if (IS_ERR(bank->base)) return PTR_ERR(bank->base); - err = clk_prepare_enable(bank->clk); - if (err) { - dev_err(dev, "failed to prepare_enable clk (%d)\n", err); - return err; - } - bank->gpio_chip = stm32_gpio_template; fwnode_property_read_string(fwnode, "st,bank-name", &bank->gpio_chip.label); @@ -1360,26 +1355,20 @@ static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl, struct fwnode bank->fwnode, &stm32_gpio_domain_ops, bank); - if (!bank->domain) { - err = -ENODEV; - goto err_clk; - } + if (!bank->domain) + return -ENODEV; } names = devm_kcalloc(dev, npins, sizeof(char *), GFP_KERNEL); - if (!names) { - err = -ENOMEM; - goto err_clk; - } + if (!names) + return -ENOMEM; for (i = 0; i < npins; i++) { stm32_pin = stm32_pctrl_get_desc_pin_from_gpio(pctl, bank, i); if (stm32_pin && stm32_pin->pin.name) { names[i] = devm_kasprintf(dev, GFP_KERNEL, "%s", stm32_pin->pin.name); - if (!names[i]) { - err = -ENOMEM; - goto err_clk; - } + if (!names[i]) + return -ENOMEM; } else { names[i] = NULL; } @@ -1390,15 +1379,11 @@ static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl, struct fwnode err = gpiochip_add_data(&bank->gpio_chip, bank); if (err) { dev_err(dev, "Failed to add gpiochip(%d)!\n", bank_nr); - goto err_clk; + return err; } dev_info(dev, "%s bank added\n", bank->gpio_chip.label); return 0; - -err_clk: - clk_disable_unprepare(bank->clk); - return err; } static struct irq_domain *stm32_pctrl_get_irq_domain(struct platform_device *pdev) @@ -1621,6 +1606,11 @@ int stm32_pctl_probe(struct platform_device *pdev) if (!pctl->banks) return -ENOMEM; + pctl->clks = devm_kcalloc(dev, banks, sizeof(*pctl->clks), + GFP_KERNEL); + if (!pctl->clks) + return -ENOMEM; + i = 0; for_each_gpiochip_node(dev, child) { struct stm32_gpio_bank *bank = &pctl->banks[i]; @@ -1632,24 +1622,27 @@ int stm32_pctl_probe(struct platform_device *pdev) return -EPROBE_DEFER; } - bank->clk = of_clk_get_by_name(np, NULL); - if (IS_ERR(bank->clk)) { + pctl->clks[i].clk = of_clk_get_by_name(np, NULL); + if (IS_ERR(pctl->clks[i].clk)) { fwnode_handle_put(child); - return dev_err_probe(dev, PTR_ERR(bank->clk), + return dev_err_probe(dev, PTR_ERR(pctl->clks[i].clk), "failed to get clk\n"); } + pctl->clks[i].id = "pctl"; i++; } + ret = clk_bulk_prepare_enable(banks, pctl->clks); + if (ret) { + dev_err(dev, "failed to prepare_enable clk (%d)\n", ret); + return ret; + } + for_each_gpiochip_node(dev, child) { ret = stm32_gpiolib_register_bank(pctl, child); if (ret) { fwnode_handle_put(child); - - for (i = 0; i < pctl->nbanks; i++) - clk_disable_unprepare(pctl->banks[i].clk); - - return ret; + goto err_register; } pctl->nbanks++; @@ -1658,6 +1651,15 @@ int stm32_pctl_probe(struct platform_device *pdev) dev_info(dev, "Pinctrl STM32 initialized\n"); return 0; +err_register: + for (i = 0; i < pctl->nbanks; i++) { + struct stm32_gpio_bank *bank = &pctl->banks[i]; + + gpiochip_remove(&bank->gpio_chip); + } + + clk_bulk_disable_unprepare(banks, pctl->clks); + return ret; } static int __maybe_unused stm32_pinctrl_restore_gpio_regs( @@ -1726,10 +1728,8 @@ static int __maybe_unused stm32_pinctrl_restore_gpio_regs( int __maybe_unused stm32_pinctrl_suspend(struct device *dev) { struct stm32_pinctrl *pctl = dev_get_drvdata(dev); - int i; - for (i = 0; i < pctl->nbanks; i++) - clk_disable(pctl->banks[i].clk); + clk_bulk_disable(pctl->nbanks, pctl->clks); return 0; } @@ -1738,10 +1738,11 @@ int __maybe_unused stm32_pinctrl_resume(struct device *dev) { struct stm32_pinctrl *pctl = dev_get_drvdata(dev); struct stm32_pinctrl_group *g = pctl->groups; - int i; + int i, ret; - for (i = 0; i < pctl->nbanks; i++) - clk_enable(pctl->banks[i].clk); + ret = clk_bulk_enable(pctl->nbanks, pctl->clks); + if (ret) + return ret; for (i = 0; i < pctl->ngroups; i++, g++) stm32_pinctrl_restore_gpio_regs(pctl, g->pin); |