clk: ti: Fix missing omap4 mcbsp functional clock and aliases

We are using a wrong mcbsp functional clock. The interconnect target module
driver provided clock for mcbsp is not same as the mcbsp functional clock
known as the gfclk main_clk. The mcbsp functional clocks for mcbsp should
have been added before we dropped the legacy platform data.

Additionally we are also missing the clock aliases for the clocks used by
the audio driver if reparenting is needed. This causes audio driver errors
like "CLKS: could not clk_get() prcm_fck" for mcbsp as reported by Andreas.
The mcbsp clock aliases too should have been added before we dropped the
legacy platform data.

Let's add the clocks and aliases with a single patch to fix the issue.

Fixes: 349355ce ("ARM: OMAP2+: Drop legacy platform data for omap4 mcbsp")
Reported-by: Andreas Kemnade <andreas@kemnade.info>
Reported-by: Péter Ujfalusi <peter.ujfalusi@gmail.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/ti/omap/omap4-l4-abe.dtsi

@@ -109,6 +109,8 @@ mcbsp1: mcbsp@0 {
 				reg = <0x0 0xff>, /* MPU private access */
 				      <0x49022000 0xff>; /* L3 Interconnect */
 				reg-names = "mpu", "dma";
+				clocks = <&abe_clkctrl OMAP4_MCBSP1_CLKCTRL 24>;
+				clock-names = "fck";
 				interrupts = <GIC_SPI 17 IRQ_TYPE_LEVEL_HIGH>;
 				interrupt-names = "common";
 				ti,buffer-size = <128>;
@@ -142,6 +144,8 @@ mcbsp2: mcbsp@0 {
 				reg = <0x0 0xff>, /* MPU private access */
 				      <0x49024000 0xff>; /* L3 Interconnect */
 				reg-names = "mpu", "dma";
+				clocks = <&abe_clkctrl OMAP4_MCBSP2_CLKCTRL 24>;
+				clock-names = "fck";
 				interrupts = <GIC_SPI 22 IRQ_TYPE_LEVEL_HIGH>;
 				interrupt-names = "common";
 				ti,buffer-size = <128>;
@@ -175,6 +179,8 @@ mcbsp3: mcbsp@0 {
 				reg = <0x0 0xff>, /* MPU private access */
 				      <0x49026000 0xff>; /* L3 Interconnect */
 				reg-names = "mpu", "dma";
+				clocks = <&abe_clkctrl OMAP4_MCBSP3_CLKCTRL 24>;
+				clock-names = "fck";
 				interrupts = <GIC_SPI 23 IRQ_TYPE_LEVEL_HIGH>;
 				interrupt-names = "common";
 				ti,buffer-size = <128>;

arch/arm/boot/dts/ti/omap/omap4-l4.dtsi

@@ -2043,6 +2043,8 @@ mcbsp4: mcbsp@0 {
 				compatible = "ti,omap4-mcbsp";
 				reg = <0x0 0xff>; /* L4 Interconnect */
 				reg-names = "mpu";
+				clocks = <&l4_per_clkctrl OMAP4_MCBSP4_CLKCTRL 24>;
+				clock-names = "fck";
 				interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
 				interrupt-names = "common";
 				ti,buffer-size = <128>;

drivers/clk/ti/clk-44xx.c

@@ -749,9 +749,14 @@ static struct ti_dt_clk omap44xx_clks[] = {
 	DT_CLK(NULL, "mcbsp1_sync_mux_ck", "abe-clkctrl:0028:26"),
 	DT_CLK(NULL, "mcbsp2_sync_mux_ck", "abe-clkctrl:0030:26"),
 	DT_CLK(NULL, "mcbsp3_sync_mux_ck", "abe-clkctrl:0038:26"),
+	DT_CLK("40122000.mcbsp", "prcm_fck", "abe-clkctrl:0028:26"),
+	DT_CLK("40124000.mcbsp", "prcm_fck", "abe-clkctrl:0030:26"),
+	DT_CLK("40126000.mcbsp", "prcm_fck", "abe-clkctrl:0038:26"),
 	DT_CLK(NULL, "mcbsp4_sync_mux_ck", "l4-per-clkctrl:00c0:26"),
+	DT_CLK("48096000.mcbsp", "prcm_fck", "l4-per-clkctrl:00c0:26"),
 	DT_CLK(NULL, "ocp2scp_usb_phy_phy_48m", "l3-init-clkctrl:00c0:8"),
 	DT_CLK(NULL, "otg_60m_gfclk", "l3-init-clkctrl:0040:24"),
+	DT_CLK(NULL, "pad_fck", "pad_clks_ck"),
 	DT_CLK(NULL, "per_mcbsp4_gfclk", "l4-per-clkctrl:00c0:24"),
 	DT_CLK(NULL, "pmd_stm_clock_mux_ck", "emu-sys-clkctrl:0000:20"),
 	DT_CLK(NULL, "pmd_trace_clk_mux_ck", "emu-sys-clkctrl:0000:22"),