From ffa91e7ca1426a89eec1b3101286d82785760767 Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Thu, 19 Mar 2020 13:27:31 +0100 Subject: gpio: tegra186: Add Tegra194 pin ranges for GG.0 and GG.1 The GG.0 and GG.1 GPIOs serve as CLKREQ and RST pins, respectively, for PCIe controller 5 on Tegra194. When this controller is configured in endpoint mode, these pins need to be used as GPIOs by the PCIe endpoint driver. Typically the mode programming of these pins (GPIO vs. SFIO) is performed by early boot firmware to ensure that the configuration is consistent. However, the GG.0 and GG.1 pins are part of a special power partition that is not enabled during early boot, and hence the early boot firmware cannot program these pins to be GPIOs (they are SFIO by default). Adding them as pin ranges for the pin controller allows the pin controller to be involved when these pins are requested as GPIOs and allows the proper programming to take place. Signed-off-by: Thierry Reding Link: https://lore.kernel.org/r/20200319122737.3063291-4-thierry.reding@gmail.com Tested-by: Vidya Sagar Signed-off-by: Linus Walleij --- drivers/gpio/gpio-tegra186.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers') diff --git a/drivers/gpio/gpio-tegra186.c b/drivers/gpio/gpio-tegra186.c index 1086c1fcaf49..79b553dc39a3 100644 --- a/drivers/gpio/gpio-tegra186.c +++ b/drivers/gpio/gpio-tegra186.c @@ -839,11 +839,19 @@ static const struct tegra_gpio_port tegra194_main_ports[] = { TEGRA194_MAIN_GPIO_PORT(GG, 0, 0, 2) }; +static const struct tegra186_pin_range tegra194_main_pin_ranges[] = { + { TEGRA194_MAIN_GPIO(GG, 0), "pex_l5_clkreq_n_pgg0" }, + { TEGRA194_MAIN_GPIO(GG, 1), "pex_l5_rst_n_pgg1" }, +}; + static const struct tegra_gpio_soc tegra194_main_soc = { .num_ports = ARRAY_SIZE(tegra194_main_ports), .ports = tegra194_main_ports, .name = "tegra194-gpio", .instance = 0, + .num_pin_ranges = ARRAY_SIZE(tegra194_main_pin_ranges), + .pin_ranges = tegra194_main_pin_ranges, + .pinmux = "nvidia,tegra194-pinmux", }; #define TEGRA194_AON_GPIO_PORT(_name, _bank, _port, _pins) \ -- cgit v1.2.3