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pci: imx: request gpio before use

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

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: Stefano Babic <ssbabic@denx.de>
This commit is contained in:
Peng Fan 2018-01-02 18:27:29 +08:00 • committed by Stefano Babic
parent d9523fdd11
commit 67b71df277
1 changed files with 4 additions and 0 deletions
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4
drivers/pci/pcie_imx.c
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@ -517,10 +517,12 @@ static int imx6_pcie_init_phy(void)
__weak int imx6_pcie_toggle_power(void) __weak int imx6_pcie_toggle_power(void)
{ {
#ifdef CONFIG_PCIE_IMX_POWER_GPIO #ifdef CONFIG_PCIE_IMX_POWER_GPIO
gpio_request(CONFIG_PCIE_IMX_POWER_GPIO, "pcie_power");
gpio_direction_output(CONFIG_PCIE_IMX_POWER_GPIO, 0); gpio_direction_output(CONFIG_PCIE_IMX_POWER_GPIO, 0);
mdelay(20); mdelay(20);
gpio_set_value(CONFIG_PCIE_IMX_POWER_GPIO, 1); gpio_set_value(CONFIG_PCIE_IMX_POWER_GPIO, 1);
mdelay(20); mdelay(20);
gpio_free(CONFIG_PCIE_IMX_POWER_GPIO);
#endif #endif
return 0; return 0;
} }
@ -556,10 +558,12 @@ __weak int imx6_pcie_toggle_reset(void)
* state due to being previously used in U-Boot. * state due to being previously used in U-Boot.
*/ */
#ifdef CONFIG_PCIE_IMX_PERST_GPIO #ifdef CONFIG_PCIE_IMX_PERST_GPIO
gpio_request(CONFIG_PCIE_IMX_PERST_GPIO, "pcie_reset");
gpio_direction_output(CONFIG_PCIE_IMX_PERST_GPIO, 0); gpio_direction_output(CONFIG_PCIE_IMX_PERST_GPIO, 0);
mdelay(20); mdelay(20);
gpio_set_value(CONFIG_PCIE_IMX_PERST_GPIO, 1); gpio_set_value(CONFIG_PCIE_IMX_PERST_GPIO, 1);
mdelay(20); mdelay(20);
gpio_free(CONFIG_PCIE_IMX_PERST_GPIO);
#else #else
puts("WARNING: Make sure the PCIe #PERST line is connected!\n"); puts("WARNING: Make sure the PCIe #PERST line is connected!\n");
#endif #endif