diff options
Diffstat (limited to 'recipes-kernel/linux/linux-toradex-mainline-4.9/0001-apalis_t30-tk1-fix-pcie-clock-and-reset-not-conformi.patch')
| -rw-r--r-- | recipes-kernel/linux/linux-toradex-mainline-4.9/0001-apalis_t30-tk1-fix-pcie-clock-and-reset-not-conformi.patch | 147 |
1 files changed, 0 insertions, 147 deletions
diff --git a/recipes-kernel/linux/linux-toradex-mainline-4.9/0001-apalis_t30-tk1-fix-pcie-clock-and-reset-not-conformi.patch b/recipes-kernel/linux/linux-toradex-mainline-4.9/0001-apalis_t30-tk1-fix-pcie-clock-and-reset-not-conformi.patch deleted file mode 100644 index c958ff6..0000000 --- a/recipes-kernel/linux/linux-toradex-mainline-4.9/0001-apalis_t30-tk1-fix-pcie-clock-and-reset-not-conformi.patch +++ /dev/null @@ -1,147 +0,0 @@ -From a2286569bb02b2ef881302eedbd944f8482beabe Mon Sep 17 00:00:00 2001 -From: Marcel Ziswiler <marcel.ziswiler@toradex.com> -Date: Thu, 15 Dec 2016 10:24:58 +0100 -Subject: [PATCH 1/4] apalis_t30/tk1: fix pcie clock and reset not conforming - to specification - -Fix PCIe clock and reset not conforming to specification by moving PCIe -reset handling including the PLX PEX 8605 errata 5 workaround from the -board platform data into the right places timing wise in the PCIe driver -itself. - -Also add a kernel command line argument to allow using the Apalis GPIO7 -as a regular GPIO rather than for above mentioned PLX PEX 8605 -workaround: - -pex_perst=0 - -Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com> -Acked-by: Dominik Sliwa <dominik.sliwa@toradex.com> -(cherry picked from toradex_tk1_l4t_r21.5 commit -3e2259b04c2e2c029f742e9dda06a3a2739977d4) -(cherry picked from tegra commit -a2f63805703b43d55d91ae17f10d0049bf0f625e) - ---- - - drivers/pci/host/pci-tegra.c | 83 ++++++++++++++++++++++++++++++++++++++++++++ - 1 file changed, 83 insertions(+) - -diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c -index 8dfccf7..1452fe4 100644 ---- a/drivers/pci/host/pci-tegra.c -+++ b/drivers/pci/host/pci-tegra.c -@@ -55,6 +55,34 @@ - #include <asm/mach/map.h> - #include <asm/mach/pci.h> - -+//#define CONFIG_MACH_APALIS_T30 -+#define CONFIG_MACH_APALIS_TK1 -+#if defined(CONFIG_MACH_APALIS_T30) || defined(CONFIG_MACH_APALIS_TK1) -+#include <linux/gpio.h> -+ -+#include "../../../arch/arm/boot/dts/include/dt-bindings/gpio/tegra-gpio.h" -+ -+#ifdef CONFIG_MACH_APALIS_T30 -+#define APALIS_GPIO7 TEGRA_GPIO(S, 7) -+ -+#define LAN_RESET_N -1 -+ -+#define PEX_PERST_N APALIS_GPIO7 -+ -+#define RESET_MOCI_N TEGRA_GPIO(I, 4) -+#endif -+ -+#ifdef CONFIG_MACH_APALIS_TK1 -+#define APALIS_GPIO7 TEGRA_GPIO(DD, 1) -+ -+#define LAN_RESET_N TEGRA_GPIO(S, 2) -+ -+#define PEX_PERST_N APALIS_GPIO7 -+ -+#define RESET_MOCI_N TEGRA_GPIO(U, 4) -+#endif -+#endif -+ - #define INT_PCI_MSI_NR (8 * 32) - - /* register definitions */ -@@ -322,6 +350,21 @@ struct tegra_pcie_bus { - unsigned int nr; - }; - -+#if defined(CONFIG_MACH_APALIS_T30) || defined(CONFIG_MACH_APALIS_TK1) -+/* To disable the PCIe switch reset errata workaround */ -+int g_pex_perst = 1; -+ -+/* To disable the PCIe switch reset errata workaround */ -+static int __init disable_pex_perst(char *s) -+{ -+ if (!(*s) || !strcmp(s, "0")) -+ g_pex_perst = 0; -+ -+ return 0; -+} -+__setup("pex_perst=", disable_pex_perst); -+#endif /* CONFIG_MACH_APALIS_T30 || CONFIG_MACH_APALIS_TK1 */ -+ - static inline struct tegra_pcie *sys_to_pcie(struct pci_sys_data *sys) - { - return sys->private_data; -@@ -528,6 +571,27 @@ static void tegra_pcie_port_reset(struct tegra_pcie_port *port) - unsigned long ctrl = tegra_pcie_port_get_pex_ctrl(port); - unsigned long value; - -+#if defined(CONFIG_MACH_APALIS_T30) || defined(CONFIG_MACH_APALIS_TK1) -+ /* -+ * Reset PLX PEX 8605 PCIe Switch plus PCIe devices on Apalis Evaluation -+ * Board -+ */ -+ if (g_pex_perst) -+ gpio_request(PEX_PERST_N, "PEX_PERST_N"); -+ gpio_request(RESET_MOCI_N, "RESET_MOCI_N"); -+ if (g_pex_perst) -+ gpio_direction_output(PEX_PERST_N, 0); -+ gpio_direction_output(RESET_MOCI_N, 0); -+ -+#ifdef CONFIG_MACH_APALIS_TK1 -+ /* Reset I210 Gigabit Ethernet Controller */ -+ if (LAN_RESET_N) { -+ gpio_request(LAN_RESET_N, "LAN_RESET_N"); -+ gpio_direction_output(LAN_RESET_N, 0); -+ } -+#endif /* CONFIG_MACH_APALIS_TK1 */ -+#endif /* CONFIG_MACH_APALIS_T30 || CONFIG_MACH_APALIS_TK1 */ -+ - /* pulse reset signal */ - value = afi_readl(port->pcie, ctrl); - value &= ~AFI_PEX_CTRL_RST; -@@ -538,6 +602,25 @@ static void tegra_pcie_port_reset(struct tegra_pcie_port *port) - value = afi_readl(port->pcie, ctrl); - value |= AFI_PEX_CTRL_RST; - afi_writel(port->pcie, value, ctrl); -+ -+#if defined(CONFIG_MACH_APALIS_T30) || defined(CONFIG_MACH_APALIS_TK1) -+ /* Must be asserted for 100 ms after power and clocks are stable */ -+ if (g_pex_perst) -+ gpio_set_value(PEX_PERST_N, 1); -+ /* -+ * Err_5: PEX_REFCLK_OUTpx/nx Clock Outputs is not Guaranteed Until -+ * 900 us After PEX_PERST# De-assertion -+ */ -+ if (g_pex_perst) -+ mdelay(1); -+ gpio_set_value(RESET_MOCI_N, 1); -+ -+#ifdef CONFIG_MACH_APALIS_TK1 -+ /* Release I210 Gigabit Ethernet Controller Reset */ -+ if (LAN_RESET_N) -+ gpio_set_value(LAN_RESET_N, 1); -+#endif /* CONFIG_MACH_APALIS_TK1 */ -+#endif /* CONFIG_MACH_APALIS_T30 || CONFIG_MACH_APALIS_TK1 */ - } - - static void tegra_pcie_port_enable(struct tegra_pcie_port *port) --- -2.9.3 - |