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authorLucas Stach <l.stach@pengutronix.de>2014-09-26 15:41:00 +0200
committerShawn Guo <shawn.guo@linaro.org>2014-11-19 11:51:53 +0800
commit07a43156d5edc037656ba733faaa8ad26c60a794 (patch)
tree6fe4b754b4f71c2edbaeac293bbe716cc346ffa7 /arch
parent31a262d66ec2a6e2141e88645bd80560649a8328 (diff)
ARM: imx5: add step clock, used when reprogramming PLL1
This is the bypass clock used to feed the ARM partition while we reprogram PLL1 to another rate. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-imx/clk-imx51-imx53.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/arm/mach-imx/clk-imx51-imx53.c b/arch/arm/mach-imx/clk-imx51-imx53.c
index 72d65214223e..aafccf4b47c2 100644
--- a/arch/arm/mach-imx/clk-imx51-imx53.c
+++ b/arch/arm/mach-imx/clk-imx51-imx53.c
@@ -125,6 +125,8 @@ static const char *mx53_spdif_xtal_sel[] = { "osc", "ckih", "ckih2", "pll4_sw",
static const char *spdif_sel[] = { "pll1_sw", "pll2_sw", "pll3_sw", "spdif_xtal_sel", };
static const char *spdif0_com_sel[] = { "spdif0_podf", "ssi1_root_gate", };
static const char *mx51_spdif1_com_sel[] = { "spdif1_podf", "ssi2_root_gate", };
+static const char *step_sels[] = { "lp_apm", };
+static const char *cpu_podf_sels[] = { "pll1_sw", "step_sel" };
static struct clk *clk[IMX5_CLK_END];
static struct clk_onecell_data clk_data;
@@ -193,7 +195,9 @@ static void __init mx5_clocks_common_init(void __iomem *ccm_base)
clk[IMX5_CLK_USB_PHY_PODF] = imx_clk_divider("usb_phy_podf", "usb_phy_pred", MXC_CCM_CDCDR, 0, 3);
clk[IMX5_CLK_USB_PHY_SEL] = imx_clk_mux("usb_phy_sel", MXC_CCM_CSCMR1, 26, 1,
usb_phy_sel_str, ARRAY_SIZE(usb_phy_sel_str));
- clk[IMX5_CLK_CPU_PODF] = imx_clk_divider("cpu_podf", "pll1_sw", MXC_CCM_CACRR, 0, 3);
+ clk[IMX5_CLK_STEP_SEL] = imx_clk_mux("step_sel", MXC_CCM_CCSR, 7, 2, step_sels, ARRAY_SIZE(step_sels));
+ clk[IMX5_CLK_CPU_PODF_SEL] = imx_clk_mux("cpu_podf_sel", MXC_CCM_CCSR, 2, 1, cpu_podf_sels, ARRAY_SIZE(cpu_podf_sels));
+ clk[IMX5_CLK_CPU_PODF] = imx_clk_divider("cpu_podf", "cpu_podf_sel", MXC_CCM_CACRR, 0, 3);
clk[IMX5_CLK_DI_PRED] = imx_clk_divider("di_pred", "pll3_sw", MXC_CCM_CDCDR, 6, 3);
clk[IMX5_CLK_IIM_GATE] = imx_clk_gate2("iim_gate", "ipg", MXC_CCM_CCGR0, 30);
clk[IMX5_CLK_UART1_IPG_GATE] = imx_clk_gate2("uart1_ipg_gate", "ipg", MXC_CCM_CCGR1, 6);
@@ -551,6 +555,9 @@ static void __init mx53_clocks_init(struct device_node *np)
/* move can bus clk to 24MHz */
clk_set_parent(clk[IMX5_CLK_CAN_SEL], clk[IMX5_CLK_LP_APM]);
+ /* make sure step clock is running from 24MHz */
+ clk_set_parent(clk[IMX5_CLK_STEP_SEL], clk[IMX5_CLK_LP_APM]);
+
clk_prepare_enable(clk[IMX5_CLK_IIM_GATE]);
imx_print_silicon_rev("i.MX53", mx53_revision());
clk_disable_unprepare(clk[IMX5_CLK_IIM_GATE]);