clk: tegra: Properly setup PWM clock on Tegra30

The clock for the PWM controller is slightly different from other
peripheral clocks on Tegra30. The clock source mux field start at
bit position 28 rather than 30.

Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/clk/tegra/clk-tegra30.c

@@ -102,6 +102,7 @@
 #define AUDIO_SYNC_CLK_SPDIF 0x4b4
 
 #define CLK_SOURCE_SPDIF_OUT 0x108
+#define CLK_SOURCE_PWM 0x110
 #define CLK_SOURCE_D_AUDIO 0x3d0
 #define CLK_SOURCE_DAM0 0x3d8
 #define CLK_SOURCE_DAM1 0x3dc
@@ -827,7 +828,6 @@ static struct tegra_clk tegra30_clks[tegra_clk_max] __initdata = {
 	[tegra_clk_extern1] = { .dt_id = TEGRA30_CLK_EXTERN1, .present = true },
 	[tegra_clk_extern2] = { .dt_id = TEGRA30_CLK_EXTERN2, .present = true },
 	[tegra_clk_extern3] = { .dt_id = TEGRA30_CLK_EXTERN3, .present = true },
-	[tegra_clk_pwm] = { .dt_id = TEGRA30_CLK_PWM, .present = true },
 	[tegra_clk_disp1] = { .dt_id = TEGRA30_CLK_DISP1, .present = true },
 	[tegra_clk_disp2] = { .dt_id = TEGRA30_CLK_DISP2, .present = true },
 	[tegra_clk_apbdma] = { .dt_id = TEGRA30_CLK_APBDMA, .present = true },
@@ -1111,6 +1111,7 @@ static const char *mux_pllpmdacd2_clkm[] = { "pll_p", "pll_m", "pll_d_out0",
 					     "pll_d2_out0", "clk_m" };
 static const char *mux_plld_out0_plld2_out0[] = { "pll_d_out0",
 						  "pll_d2_out0" };
+static const char *pwm_parents[] = { "pll_p", "pll_c", "clk_32k", "clk_m" };
 
 static struct tegra_periph_init_data tegra_periph_clk_list[] = {
 	TEGRA_INIT_DATA_MUX("spdif_out", spdif_out_parents, CLK_SOURCE_SPDIF_OUT, 10, TEGRA_PERIPH_ON_APB, TEGRA30_CLK_SPDIF_OUT),
@@ -1121,6 +1122,7 @@ static struct tegra_periph_init_data tegra_periph_clk_list[] = {
 	TEGRA_INIT_DATA_INT("3d2", mux_pllmcpa, CLK_SOURCE_3D2, 98, TEGRA_PERIPH_MANUAL_RESET, TEGRA30_CLK_GR3D2),
 	TEGRA_INIT_DATA_INT("se", mux_pllpcm_clkm, CLK_SOURCE_SE, 127, 0, TEGRA30_CLK_SE),
 	TEGRA_INIT_DATA_MUX8("hdmi", mux_pllpmdacd2_clkm, CLK_SOURCE_HDMI, 51, 0, TEGRA30_CLK_HDMI),
+	TEGRA_INIT_DATA("pwm", NULL, NULL, pwm_parents, CLK_SOURCE_PWM, 28, 2, 0, 0, 8, 1, 0, 17, TEGRA_PERIPH_ON_APB, TEGRA30_CLK_PWM),
 };
 
 static struct tegra_periph_init_data tegra_periph_nodiv_clk_list[] = {