[U-Boot] [PATCH V2] pci: imx: request gpio before use

Peng Fan peng.fan at nxp.com
Tue Jan 2 10:27:29 UTC 2018


Before use GPIO, we need to request gpio first. Free gpio after use.

Signed-off-by: Peng Fan <peng.fan at nxp.com>
Cc: Stefano Babic <sbabic at denx.de>
Cc: Fabio Estevam <fabio.estevam at nxp.com>
---

V2:
 Typo fix.
 Free gpio after use.

 drivers/pci/pcie_imx.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/pci/pcie_imx.c b/drivers/pci/pcie_imx.c
index 2900c8d9d1..90a34063b0 100644
--- a/drivers/pci/pcie_imx.c
+++ b/drivers/pci/pcie_imx.c
@@ -517,10 +517,12 @@ static int imx6_pcie_init_phy(void)
 __weak int imx6_pcie_toggle_power(void)
 {
 #ifdef CONFIG_PCIE_IMX_POWER_GPIO
+	gpio_request(CONFIG_PCIE_IMX_POWER_GPIO, "pcie_power");
 	gpio_direction_output(CONFIG_PCIE_IMX_POWER_GPIO, 0);
 	mdelay(20);
 	gpio_set_value(CONFIG_PCIE_IMX_POWER_GPIO, 1);
 	mdelay(20);
+	gpio_free(CONFIG_PCIE_IMX_POWER_GPIO);
 #endif
 	return 0;
 }
@@ -556,10 +558,12 @@ __weak int imx6_pcie_toggle_reset(void)
 	 * state due to being previously used in U-Boot.
 	 */
 #ifdef CONFIG_PCIE_IMX_PERST_GPIO
+	gpio_request(CONFIG_PCIE_IMX_PERST_GPIO, "pcie_reset");
 	gpio_direction_output(CONFIG_PCIE_IMX_PERST_GPIO, 0);
 	mdelay(20);
 	gpio_set_value(CONFIG_PCIE_IMX_PERST_GPIO, 1);
 	mdelay(20);
+	gpio_free(CONFIG_PCIE_IMX_PERST_GPIO);
 #else
 	puts("WARNING: Make sure the PCIe #PERST line is connected!\n");
 #endif
-- 
2.14.1



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