diff options
Diffstat (limited to 'target/linux/at91/patches-5.15/146-pinctrl-at91-pio4-add-support-for-slew-rate.patch')
| -rw-r--r-- | target/linux/at91/patches-5.15/146-pinctrl-at91-pio4-add-support-for-slew-rate.patch | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/target/linux/at91/patches-5.15/146-pinctrl-at91-pio4-add-support-for-slew-rate.patch b/target/linux/at91/patches-5.15/146-pinctrl-at91-pio4-add-support-for-slew-rate.patch deleted file mode 100644 index 84dea5a48a..0000000000 --- a/target/linux/at91/patches-5.15/146-pinctrl-at91-pio4-add-support-for-slew-rate.patch +++ /dev/null @@ -1,121 +0,0 @@ -From bd819c78346012ae0627b1cd4f6ceb1b51162c71 Mon Sep 17 00:00:00 2001 -From: Claudiu Beznea <claudiu.beznea@microchip.com> -Date: Wed, 27 Jan 2021 13:45:44 +0200 -Subject: [PATCH 146/247] pinctrl: at91-pio4: add support for slew-rate - -SAMA7G5 supports slew rate configuration. Adapt the driver for this. -For output switching frequencies lower than 50MHz the slew rate needs to -be enabled. Since most of the pins on SAMA7G5 fall into this category -enabled the slew rate by default. - -Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> -Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com> -Link: https://lore.kernel.org/r/1611747945-29960-3-git-send-email-claudiu.beznea@microchip.com -Signed-off-by: Linus Walleij <linus.walleij@linaro.org> ---- - drivers/pinctrl/pinctrl-at91-pio4.c | 27 +++++++++++++++++++++++++++ - 1 file changed, 27 insertions(+) - ---- a/drivers/pinctrl/pinctrl-at91-pio4.c -+++ b/drivers/pinctrl/pinctrl-at91-pio4.c -@@ -36,6 +36,7 @@ - #define ATMEL_PIO_DIR_MASK BIT(8) - #define ATMEL_PIO_PUEN_MASK BIT(9) - #define ATMEL_PIO_PDEN_MASK BIT(10) -+#define ATMEL_PIO_SR_MASK BIT(11) - #define ATMEL_PIO_IFEN_MASK BIT(12) - #define ATMEL_PIO_IFSCEN_MASK BIT(13) - #define ATMEL_PIO_OPD_MASK BIT(14) -@@ -76,10 +77,12 @@ - * @nbanks: number of PIO banks - * @last_bank_count: number of lines in the last bank (can be less than - * the rest of the banks). -+ * @slew_rate_support: slew rate support - */ - struct atmel_pioctrl_data { - unsigned nbanks; - unsigned last_bank_count; -+ unsigned int slew_rate_support; - }; - - struct atmel_group { -@@ -117,6 +120,7 @@ struct atmel_pin { - * @pm_suspend_backup: backup/restore register values on suspend/resume - * @dev: device entry for the Atmel PIO controller. - * @node: node of the Atmel PIO controller. -+ * @slew_rate_support: slew rate support - */ - struct atmel_pioctrl { - void __iomem *reg_base; -@@ -138,6 +142,7 @@ struct atmel_pioctrl { - } *pm_suspend_backup; - struct device *dev; - struct device_node *node; -+ unsigned int slew_rate_support; - }; - - static const char * const atmel_functions[] = { -@@ -760,6 +765,13 @@ static int atmel_conf_pin_config_group_g - return -EINVAL; - arg = 1; - break; -+ case PIN_CONFIG_SLEW_RATE: -+ if (!atmel_pioctrl->slew_rate_support) -+ return -EOPNOTSUPP; -+ if (!(res & ATMEL_PIO_SR_MASK)) -+ return -EINVAL; -+ arg = 1; -+ break; - case ATMEL_PIN_CONFIG_DRIVE_STRENGTH: - if (!(res & ATMEL_PIO_DRVSTR_MASK)) - return -EINVAL; -@@ -793,6 +805,10 @@ static int atmel_conf_pin_config_group_s - dev_dbg(pctldev->dev, "%s: pin=%u, config=0x%lx\n", - __func__, pin_id, configs[i]); - -+ /* Keep slew rate enabled by default. */ -+ if (atmel_pioctrl->slew_rate_support) -+ conf |= ATMEL_PIO_SR_MASK; -+ - switch (param) { - case PIN_CONFIG_BIAS_DISABLE: - conf &= (~ATMEL_PIO_PUEN_MASK); -@@ -850,6 +866,13 @@ static int atmel_conf_pin_config_group_s - ATMEL_PIO_SODR); - } - break; -+ case PIN_CONFIG_SLEW_RATE: -+ if (!atmel_pioctrl->slew_rate_support) -+ break; -+ /* And remove it if explicitly requested. */ -+ if (arg == 0) -+ conf &= ~ATMEL_PIO_SR_MASK; -+ break; - case ATMEL_PIN_CONFIG_DRIVE_STRENGTH: - switch (arg) { - case ATMEL_PIO_DRVSTR_LO: -@@ -901,6 +924,8 @@ static void atmel_conf_pin_config_dbg_sh - seq_printf(s, "%s ", "open-drain"); - if (conf & ATMEL_PIO_SCHMITT_MASK) - seq_printf(s, "%s ", "schmitt"); -+ if (atmel_pioctrl->slew_rate_support && (conf & ATMEL_PIO_SR_MASK)) -+ seq_printf(s, "%s ", "slew-rate"); - if (conf & ATMEL_PIO_DRVSTR_MASK) { - switch ((conf & ATMEL_PIO_DRVSTR_MASK) >> ATMEL_PIO_DRVSTR_OFFSET) { - case ATMEL_PIO_DRVSTR_ME: -@@ -994,6 +1019,7 @@ static const struct atmel_pioctrl_data a - static const struct atmel_pioctrl_data microchip_sama7g5_pioctrl_data = { - .nbanks = 5, - .last_bank_count = 8, /* sama7g5 has only PE0 to PE7 */ -+ .slew_rate_support = 1, - }; - - static const struct of_device_id atmel_pctrl_of_match[] = { -@@ -1039,6 +1065,7 @@ static int atmel_pinctrl_probe(struct pl - atmel_pioctrl->npins -= ATMEL_PIO_NPINS_PER_BANK; - atmel_pioctrl->npins += atmel_pioctrl_data->last_bank_count; - } -+ atmel_pioctrl->slew_rate_support = atmel_pioctrl_data->slew_rate_support; - - atmel_pioctrl->reg_base = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(atmel_pioctrl->reg_base)) |