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Commit c21087d5 authored by Tony Truong's avatar Tony Truong
Browse files

msm: pcie: add clk reset assert 



Before de-asserting clock reset, PCIe bus driver
needs to assert it first. Add the clock reset
assert call in PCIe bus driver.

Change-Id: Iaec42b8c0c995438d0649101a25affe2029f5a88
Signed-off-by: default avatarTony Truong <truong@codeaurora.org>
parent e40d860d

drivers/pci/host/pci-msm.c

+26 −0
Original line number Diff line number Diff line
@@ -3645,6 +3645,19 @@ static int msm_pcie_clk_init(struct msm_pcie_dev_t *dev) 
	for (i = 0; i < MSM_PCIE_MAX_RESET; i++) {

		reset_info = &dev->reset[i];

		if (reset_info->hdl) {

			rc = reset_control_assert(reset_info->hdl);

			if (rc)

				PCIE_ERR(dev,

					"PCIe: RC%d failed to assert reset for %s.\n",

					dev->rc_idx, reset_info->name);

			else

				PCIE_DBG2(dev,

					"PCIe: RC%d successfully asserted reset for %s.\n",

					dev->rc_idx, reset_info->name);



			/* add a 1ms delay to ensure the reset is asserted */

			usleep_range(1000, 1005);



			rc = reset_control_deassert(reset_info->hdl);

			if (rc)

				PCIE_ERR(dev,
@@ -3749,6 +3762,19 @@ static int msm_pcie_pipe_clk_init(struct msm_pcie_dev_t *dev) 
	for (i = 0; i < MSM_PCIE_MAX_PIPE_RESET; i++) {

		pipe_reset_info = &dev->pipe_reset[i];

		if (pipe_reset_info->hdl) {

			rc = reset_control_assert(pipe_reset_info->hdl);

			if (rc)

				PCIE_ERR(dev,

					"PCIe: RC%d failed to assert pipe reset for %s.\n",

					dev->rc_idx, pipe_reset_info->name);

			else

				PCIE_DBG2(dev,

					"PCIe: RC%d successfully asserted pipe reset for %s.\n",

					dev->rc_idx, pipe_reset_info->name);



			/* add a 1ms delay to ensure the reset is asserted */

			usleep_range(1000, 1005);



			rc = reset_control_deassert(

					pipe_reset_info->hdl);

			if (rc)