@@ -2763,33 +2763,33 @@ static const struct samsung_mux_clock peric0_mux_clks[] __initconst = {
MUX(CLK_MOUT_PERIC0_USI0_UART_USER,
"mout_peric0_usi0_uart_user", mout_peric0_usi0_uart_user_p,
PLL_CON0_MUX_CLKCMU_PERIC0_USI0_UART_USER, 4, 1),
- MUX(CLK_MOUT_PERIC0_USI14_USI_USER,
- "mout_peric0_usi14_usi_user", mout_peric0_usi_usi_user_p,
- PLL_CON0_MUX_CLKCMU_PERIC0_USI14_USI_USER, 4, 1),
- MUX(CLK_MOUT_PERIC0_USI1_USI_USER,
- "mout_peric0_usi1_usi_user", mout_peric0_usi_usi_user_p,
- PLL_CON0_MUX_CLKCMU_PERIC0_USI1_USI_USER, 4, 1),
- MUX(CLK_MOUT_PERIC0_USI2_USI_USER,
- "mout_peric0_usi2_usi_user", mout_peric0_usi_usi_user_p,
- PLL_CON0_MUX_CLKCMU_PERIC0_USI2_USI_USER, 4, 1),
- MUX(CLK_MOUT_PERIC0_USI3_USI_USER,
- "mout_peric0_usi3_usi_user", mout_peric0_usi_usi_user_p,
- PLL_CON0_MUX_CLKCMU_PERIC0_USI3_USI_USER, 4, 1),
- MUX(CLK_MOUT_PERIC0_USI4_USI_USER,
- "mout_peric0_usi4_usi_user", mout_peric0_usi_usi_user_p,
- PLL_CON0_MUX_CLKCMU_PERIC0_USI4_USI_USER, 4, 1),
- MUX(CLK_MOUT_PERIC0_USI5_USI_USER,
- "mout_peric0_usi5_usi_user", mout_peric0_usi_usi_user_p,
- PLL_CON0_MUX_CLKCMU_PERIC0_USI5_USI_USER, 4, 1),
- MUX(CLK_MOUT_PERIC0_USI6_USI_USER,
- "mout_peric0_usi6_usi_user", mout_peric0_usi_usi_user_p,
- PLL_CON0_MUX_CLKCMU_PERIC0_USI6_USI_USER, 4, 1),
- MUX(CLK_MOUT_PERIC0_USI7_USI_USER,
- "mout_peric0_usi7_usi_user", mout_peric0_usi_usi_user_p,
- PLL_CON0_MUX_CLKCMU_PERIC0_USI7_USI_USER, 4, 1),
- MUX(CLK_MOUT_PERIC0_USI8_USI_USER,
- "mout_peric0_usi8_usi_user", mout_peric0_usi_usi_user_p,
- PLL_CON0_MUX_CLKCMU_PERIC0_USI8_USI_USER, 4, 1),
+ nMUX(CLK_MOUT_PERIC0_USI14_USI_USER,
+ "mout_peric0_usi14_usi_user", mout_peric0_usi_usi_user_p,
+ PLL_CON0_MUX_CLKCMU_PERIC0_USI14_USI_USER, 4, 1),
+ nMUX(CLK_MOUT_PERIC0_USI1_USI_USER,
+ "mout_peric0_usi1_usi_user", mout_peric0_usi_usi_user_p,
+ PLL_CON0_MUX_CLKCMU_PERIC0_USI1_USI_USER, 4, 1),
+ nMUX(CLK_MOUT_PERIC0_USI2_USI_USER,
+ "mout_peric0_usi2_usi_user", mout_peric0_usi_usi_user_p,
+ PLL_CON0_MUX_CLKCMU_PERIC0_USI2_USI_USER, 4, 1),
+ nMUX(CLK_MOUT_PERIC0_USI3_USI_USER,
+ "mout_peric0_usi3_usi_user", mout_peric0_usi_usi_user_p,
+ PLL_CON0_MUX_CLKCMU_PERIC0_USI3_USI_USER, 4, 1),
+ nMUX(CLK_MOUT_PERIC0_USI4_USI_USER,
+ "mout_peric0_usi4_usi_user", mout_peric0_usi_usi_user_p,
+ PLL_CON0_MUX_CLKCMU_PERIC0_USI4_USI_USER, 4, 1),
+ nMUX(CLK_MOUT_PERIC0_USI5_USI_USER,
+ "mout_peric0_usi5_usi_user", mout_peric0_usi_usi_user_p,
+ PLL_CON0_MUX_CLKCMU_PERIC0_USI5_USI_USER, 4, 1),
+ nMUX(CLK_MOUT_PERIC0_USI6_USI_USER,
+ "mout_peric0_usi6_usi_user", mout_peric0_usi_usi_user_p,
+ PLL_CON0_MUX_CLKCMU_PERIC0_USI6_USI_USER, 4, 1),
+ nMUX(CLK_MOUT_PERIC0_USI7_USI_USER,
+ "mout_peric0_usi7_usi_user", mout_peric0_usi_usi_user_p,
+ PLL_CON0_MUX_CLKCMU_PERIC0_USI7_USI_USER, 4, 1),
+ nMUX(CLK_MOUT_PERIC0_USI8_USI_USER,
+ "mout_peric0_usi8_usi_user", mout_peric0_usi_usi_user_p,
+ PLL_CON0_MUX_CLKCMU_PERIC0_USI8_USI_USER, 4, 1),
};
static const struct samsung_div_clock peric0_div_clks[] __initconst = {
@@ -2798,33 +2798,42 @@ static const struct samsung_div_clock peric0_div_clks[] __initconst = {
DIV(CLK_DOUT_PERIC0_USI0_UART,
"dout_peric0_usi0_uart", "mout_peric0_usi0_uart_user",
CLK_CON_DIV_DIV_CLK_PERIC0_USI0_UART, 0, 4),
- DIV(CLK_DOUT_PERIC0_USI14_USI,
- "dout_peric0_usi14_usi", "mout_peric0_usi14_usi_user",
- CLK_CON_DIV_DIV_CLK_PERIC0_USI14_USI, 0, 4),
- DIV(CLK_DOUT_PERIC0_USI1_USI,
- "dout_peric0_usi1_usi", "mout_peric0_usi1_usi_user",
- CLK_CON_DIV_DIV_CLK_PERIC0_USI1_USI, 0, 4),
- DIV(CLK_DOUT_PERIC0_USI2_USI,
- "dout_peric0_usi2_usi", "mout_peric0_usi2_usi_user",
- CLK_CON_DIV_DIV_CLK_PERIC0_USI2_USI, 0, 4),
- DIV(CLK_DOUT_PERIC0_USI3_USI,
- "dout_peric0_usi3_usi", "mout_peric0_usi3_usi_user",
- CLK_CON_DIV_DIV_CLK_PERIC0_USI3_USI, 0, 4),
- DIV(CLK_DOUT_PERIC0_USI4_USI,
- "dout_peric0_usi4_usi", "mout_peric0_usi4_usi_user",
- CLK_CON_DIV_DIV_CLK_PERIC0_USI4_USI, 0, 4),
- DIV(CLK_DOUT_PERIC0_USI5_USI,
- "dout_peric0_usi5_usi", "mout_peric0_usi5_usi_user",
- CLK_CON_DIV_DIV_CLK_PERIC0_USI5_USI, 0, 4),
- DIV(CLK_DOUT_PERIC0_USI6_USI,
- "dout_peric0_usi6_usi", "mout_peric0_usi6_usi_user",
- CLK_CON_DIV_DIV_CLK_PERIC0_USI6_USI, 0, 4),
- DIV(CLK_DOUT_PERIC0_USI7_USI,
- "dout_peric0_usi7_usi", "mout_peric0_usi7_usi_user",
- CLK_CON_DIV_DIV_CLK_PERIC0_USI7_USI, 0, 4),
- DIV(CLK_DOUT_PERIC0_USI8_USI,
- "dout_peric0_usi8_usi", "mout_peric0_usi8_usi_user",
- CLK_CON_DIV_DIV_CLK_PERIC0_USI8_USI, 0, 4),
+ DIV_F(CLK_DOUT_PERIC0_USI14_USI,
+ "dout_peric0_usi14_usi", "mout_peric0_usi14_usi_user",
+ CLK_CON_DIV_DIV_CLK_PERIC0_USI14_USI, 0, 4,
+ CLK_SET_RATE_PARENT, 0),
+ DIV_F(CLK_DOUT_PERIC0_USI1_USI,
+ "dout_peric0_usi1_usi", "mout_peric0_usi1_usi_user",
+ CLK_CON_DIV_DIV_CLK_PERIC0_USI1_USI, 0, 4,
+ CLK_SET_RATE_PARENT, 0),
+ DIV_F(CLK_DOUT_PERIC0_USI2_USI,
+ "dout_peric0_usi2_usi", "mout_peric0_usi2_usi_user",
+ CLK_CON_DIV_DIV_CLK_PERIC0_USI2_USI, 0, 4,
+ CLK_SET_RATE_PARENT, 0),
+ DIV_F(CLK_DOUT_PERIC0_USI3_USI,
+ "dout_peric0_usi3_usi", "mout_peric0_usi3_usi_user",
+ CLK_CON_DIV_DIV_CLK_PERIC0_USI3_USI, 0, 4,
+ CLK_SET_RATE_PARENT, 0),
+ DIV_F(CLK_DOUT_PERIC0_USI4_USI,
+ "dout_peric0_usi4_usi", "mout_peric0_usi4_usi_user",
+ CLK_CON_DIV_DIV_CLK_PERIC0_USI4_USI, 0, 4,
+ CLK_SET_RATE_PARENT, 0),
+ DIV_F(CLK_DOUT_PERIC0_USI5_USI,
+ "dout_peric0_usi5_usi", "mout_peric0_usi5_usi_user",
+ CLK_CON_DIV_DIV_CLK_PERIC0_USI5_USI, 0, 4,
+ CLK_SET_RATE_PARENT, 0),
+ DIV_F(CLK_DOUT_PERIC0_USI6_USI,
+ "dout_peric0_usi6_usi", "mout_peric0_usi6_usi_user",
+ CLK_CON_DIV_DIV_CLK_PERIC0_USI6_USI, 0, 4,
+ CLK_SET_RATE_PARENT, 0),
+ DIV_F(CLK_DOUT_PERIC0_USI7_USI,
+ "dout_peric0_usi7_usi", "mout_peric0_usi7_usi_user",
+ CLK_CON_DIV_DIV_CLK_PERIC0_USI7_USI, 0, 4,
+ CLK_SET_RATE_PARENT, 0),
+ DIV_F(CLK_DOUT_PERIC0_USI8_USI,
+ "dout_peric0_usi8_usi", "mout_peric0_usi8_usi_user",
+ CLK_CON_DIV_DIV_CLK_PERIC0_USI8_USI, 0, 4,
+ CLK_SET_RATE_PARENT, 0),
};
static const struct samsung_gate_clock peric0_gate_clks[] __initconst = {
@@ -2857,11 +2866,11 @@ static const struct samsung_gate_clock peric0_gate_clks[] __initconst = {
GATE(CLK_GOUT_PERIC0_PERIC0_TOP0_IPCLK_0,
"gout_peric0_peric0_top0_ipclk_0", "dout_peric0_usi1_usi",
CLK_CON_GAT_GOUT_BLK_PERIC0_UID_PERIC0_TOP0_IPCLKPORT_IPCLK_0,
- 21, 0, 0),
+ 21, CLK_SET_RATE_PARENT, 0),
GATE(CLK_GOUT_PERIC0_PERIC0_TOP0_IPCLK_1,
"gout_peric0_peric0_top0_ipclk_1", "dout_peric0_usi2_usi",
CLK_CON_GAT_GOUT_BLK_PERIC0_UID_PERIC0_TOP0_IPCLKPORT_IPCLK_1,
- 21, 0, 0),
+ 21, CLK_SET_RATE_PARENT, 0),
GATE(CLK_GOUT_PERIC0_PERIC0_TOP0_IPCLK_10,
"gout_peric0_peric0_top0_ipclk_10", "dout_peric0_i3c",
CLK_CON_GAT_GOUT_BLK_PERIC0_UID_PERIC0_TOP0_IPCLKPORT_IPCLK_10,
@@ -2889,27 +2898,27 @@ static const struct samsung_gate_clock peric0_gate_clks[] __initconst = {
GATE(CLK_GOUT_PERIC0_PERIC0_TOP0_IPCLK_2,
"gout_peric0_peric0_top0_ipclk_2", "dout_peric0_usi3_usi",
CLK_CON_GAT_GOUT_BLK_PERIC0_UID_PERIC0_TOP0_IPCLKPORT_IPCLK_2,
- 21, 0, 0),
+ 21, CLK_SET_RATE_PARENT, 0),
GATE(CLK_GOUT_PERIC0_PERIC0_TOP0_IPCLK_3,
"gout_peric0_peric0_top0_ipclk_3", "dout_peric0_usi4_usi",
CLK_CON_GAT_GOUT_BLK_PERIC0_UID_PERIC0_TOP0_IPCLKPORT_IPCLK_3,
- 21, 0, 0),
+ 21, CLK_SET_RATE_PARENT, 0),
GATE(CLK_GOUT_PERIC0_PERIC0_TOP0_IPCLK_4,
"gout_peric0_peric0_top0_ipclk_4", "dout_peric0_usi5_usi",
CLK_CON_GAT_GOUT_BLK_PERIC0_UID_PERIC0_TOP0_IPCLKPORT_IPCLK_4,
- 21, 0, 0),
+ 21, CLK_SET_RATE_PARENT, 0),
GATE(CLK_GOUT_PERIC0_PERIC0_TOP0_IPCLK_5,
"gout_peric0_peric0_top0_ipclk_5", "dout_peric0_usi6_usi",
CLK_CON_GAT_GOUT_BLK_PERIC0_UID_PERIC0_TOP0_IPCLKPORT_IPCLK_5,
- 21, 0, 0),
+ 21, CLK_SET_RATE_PARENT, 0),
GATE(CLK_GOUT_PERIC0_PERIC0_TOP0_IPCLK_6,
"gout_peric0_peric0_top0_ipclk_6", "dout_peric0_usi7_usi",
CLK_CON_GAT_GOUT_BLK_PERIC0_UID_PERIC0_TOP0_IPCLKPORT_IPCLK_6,
- 21, 0, 0),
+ 21, CLK_SET_RATE_PARENT, 0),
GATE(CLK_GOUT_PERIC0_PERIC0_TOP0_IPCLK_7,
"gout_peric0_peric0_top0_ipclk_7", "dout_peric0_usi8_usi",
CLK_CON_GAT_GOUT_BLK_PERIC0_UID_PERIC0_TOP0_IPCLKPORT_IPCLK_7,
- 21, 0, 0),
+ 21, CLK_SET_RATE_PARENT, 0),
GATE(CLK_GOUT_PERIC0_PERIC0_TOP0_IPCLK_8,
"gout_peric0_peric0_top0_ipclk_8", "dout_peric0_i3c",
CLK_CON_GAT_GOUT_BLK_PERIC0_UID_PERIC0_TOP0_IPCLKPORT_IPCLK_8,
@@ -2990,7 +2999,7 @@ static const struct samsung_gate_clock peric0_gate_clks[] __initconst = {
GATE(CLK_GOUT_PERIC0_PERIC0_TOP1_IPCLK_2,
"gout_peric0_peric0_top1_ipclk_2", "dout_peric0_usi14_usi",
CLK_CON_GAT_GOUT_BLK_PERIC0_UID_PERIC0_TOP1_IPCLKPORT_IPCLK_2,
- 21, 0, 0),
+ 21, CLK_SET_RATE_PARENT, 0),
/* Disabling this clock makes the system hang. Mark the clock as critical. */
GATE(CLK_GOUT_PERIC0_PERIC0_TOP1_PCLK_0,
"gout_peric0_peric0_top1_pclk_0", "mout_peric0_bus_user",
When SPI transfer is being prepared, the spi-s3c64xx driver will call clk_set_rate() to change the rate of SPI source clock (IPCLK). But IPCLK is a gate (leaf) clock, so it must propagate the rate change up the clock tree, so that corresponding MUX/DIV clocks can actually change their values. Add CLK_SET_RATE_PARENT flag to corresponding clocks for all USI instances in GS101 PERIC0: USI{1-8, 14}. This change involves the following clocks: PERIC0 USI*: Clock Div range MUX Selection ------------------------------------------------------------------- gout_peric0_peric0_top0_ipclk_* - - dout_peric0_usi*_usi /1..16 - mout_peric0_usi*_usi_user - {24.5 MHz, 400 MHz} With input clock of 400 MHz this scheme provides the following IPCLK rate range, for each USI block: PERIC0 USI*: 1.5 MHz ... 400 MHz Accounting for internal /4 divider in SPI blocks, and because the max SPI frequency is limited at 50 MHz, it gives us next SPI SCK rates: PERIC0 USI_SPI*: 384 KHz ... 49.9 MHz Which shall be fine for the applications of the SPI bus. Fixes: 893f133a040b ("clk: samsung: gs101: add support for cmu_peric0") Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org> --- drivers/clk/samsung/clk-gs101.c | 135 +++++++++++++++++--------------- 1 file changed, 72 insertions(+), 63 deletions(-)