1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2023 MediaTek Inc. 4 * Author: Sam Shih <sam.shih@mediatek.com> 5 * Author: Xiufeng Li <Xiufeng.Li@mediatek.com> 6 */ 7 8 #include <linux/clk-provider.h> 9 #include <linux/of.h> 10 #include <linux/of_address.h> 11 #include <linux/of_device.h> 12 #include <linux/platform_device.h> 13 #include "clk-mtk.h" 14 #include "clk-gate.h" 15 #include "clk-mux.h" 16 #include <dt-bindings/clock/mediatek,mt7988-clk.h> 17 18 static DEFINE_SPINLOCK(mt7988_clk_lock); 19 20 static const char *const infra_mux_uart0_parents[] __initconst = { "csw_infra_f26m_sel", 21 "uart_sel" }; 22 23 static const char *const infra_mux_uart1_parents[] __initconst = { "csw_infra_f26m_sel", 24 "uart_sel" }; 25 26 static const char *const infra_mux_uart2_parents[] __initconst = { "csw_infra_f26m_sel", 27 "uart_sel" }; 28 29 static const char *const infra_mux_spi0_parents[] __initconst = { "i2c_sel", "spi_sel" }; 30 31 static const char *const infra_mux_spi1_parents[] __initconst = { "i2c_sel", "spim_mst_sel" }; 32 33 static const char *const infra_pwm_bck_parents[] __initconst = { "top_rtc_32p7k", 34 "csw_infra_f26m_sel", "sysaxi_sel", 35 "pwm_sel" }; 36 37 static const char *const infra_pcie_gfmux_tl_ck_o_p0_parents[] __initconst = { 38 "top_rtc_32p7k", "csw_infra_f26m_sel", "csw_infra_f26m_sel", "pextp_tl_sel" 39 }; 40 41 static const char *const infra_pcie_gfmux_tl_ck_o_p1_parents[] __initconst = { 42 "top_rtc_32p7k", "csw_infra_f26m_sel", "csw_infra_f26m_sel", "pextp_tl_p1_sel" 43 }; 44 45 static const char *const infra_pcie_gfmux_tl_ck_o_p2_parents[] __initconst = { 46 "top_rtc_32p7k", "csw_infra_f26m_sel", "csw_infra_f26m_sel", "pextp_tl_p2_sel" 47 }; 48 49 static const char *const infra_pcie_gfmux_tl_ck_o_p3_parents[] __initconst = { 50 "top_rtc_32p7k", "csw_infra_f26m_sel", "csw_infra_f26m_sel", "pextp_tl_p3_sel" 51 }; 52 53 static const struct mtk_mux infra_muxes[] = { 54 /* MODULE_CLK_SEL_0 */ 55 MUX_GATE_CLR_SET_UPD(CLK_INFRA_MUX_UART0_SEL, "infra_mux_uart0_sel", 56 infra_mux_uart0_parents, 0x0018, 0x0010, 0x0014, 0, 1, -1, -1, -1), 57 MUX_GATE_CLR_SET_UPD(CLK_INFRA_MUX_UART1_SEL, "infra_mux_uart1_sel", 58 infra_mux_uart1_parents, 0x0018, 0x0010, 0x0014, 1, 1, -1, -1, -1), 59 MUX_GATE_CLR_SET_UPD(CLK_INFRA_MUX_UART2_SEL, "infra_mux_uart2_sel", 60 infra_mux_uart2_parents, 0x0018, 0x0010, 0x0014, 2, 1, -1, -1, -1), 61 MUX_GATE_CLR_SET_UPD(CLK_INFRA_MUX_SPI0_SEL, "infra_mux_spi0_sel", infra_mux_spi0_parents, 62 0x0018, 0x0010, 0x0014, 4, 1, -1, -1, -1), 63 MUX_GATE_CLR_SET_UPD(CLK_INFRA_MUX_SPI1_SEL, "infra_mux_spi1_sel", infra_mux_spi1_parents, 64 0x0018, 0x0010, 0x0014, 5, 1, -1, -1, -1), 65 MUX_GATE_CLR_SET_UPD(CLK_INFRA_MUX_SPI2_SEL, "infra_mux_spi2_sel", infra_mux_spi0_parents, 66 0x0018, 0x0010, 0x0014, 6, 1, -1, -1, -1), 67 MUX_GATE_CLR_SET_UPD(CLK_INFRA_PWM_SEL, "infra_pwm_sel", infra_pwm_bck_parents, 0x0018, 68 0x0010, 0x0014, 14, 2, -1, -1, -1), 69 MUX_GATE_CLR_SET_UPD(CLK_INFRA_PWM_CK1_SEL, "infra_pwm_ck1_sel", infra_pwm_bck_parents, 70 0x0018, 0x0010, 0x0014, 16, 2, -1, -1, -1), 71 MUX_GATE_CLR_SET_UPD(CLK_INFRA_PWM_CK2_SEL, "infra_pwm_ck2_sel", infra_pwm_bck_parents, 72 0x0018, 0x0010, 0x0014, 18, 2, -1, -1, -1), 73 MUX_GATE_CLR_SET_UPD(CLK_INFRA_PWM_CK3_SEL, "infra_pwm_ck3_sel", infra_pwm_bck_parents, 74 0x0018, 0x0010, 0x0014, 20, 2, -1, -1, -1), 75 MUX_GATE_CLR_SET_UPD(CLK_INFRA_PWM_CK4_SEL, "infra_pwm_ck4_sel", infra_pwm_bck_parents, 76 0x0018, 0x0010, 0x0014, 22, 2, -1, -1, -1), 77 MUX_GATE_CLR_SET_UPD(CLK_INFRA_PWM_CK5_SEL, "infra_pwm_ck5_sel", infra_pwm_bck_parents, 78 0x0018, 0x0010, 0x0014, 24, 2, -1, -1, -1), 79 MUX_GATE_CLR_SET_UPD(CLK_INFRA_PWM_CK6_SEL, "infra_pwm_ck6_sel", infra_pwm_bck_parents, 80 0x0018, 0x0010, 0x0014, 26, 2, -1, -1, -1), 81 MUX_GATE_CLR_SET_UPD(CLK_INFRA_PWM_CK7_SEL, "infra_pwm_ck7_sel", infra_pwm_bck_parents, 82 0x0018, 0x0010, 0x0014, 28, 2, -1, -1, -1), 83 MUX_GATE_CLR_SET_UPD(CLK_INFRA_PWM_CK8_SEL, "infra_pwm_ck8_sel", infra_pwm_bck_parents, 84 0x0018, 0x0010, 0x0014, 30, 2, -1, -1, -1), 85 /* MODULE_CLK_SEL_1 */ 86 MUX_GATE_CLR_SET_UPD(CLK_INFRA_PCIE_GFMUX_TL_O_P0_SEL, "infra_pcie_gfmux_tl_o_p0_sel", 87 infra_pcie_gfmux_tl_ck_o_p0_parents, 0x0028, 0x0020, 0x0024, 0, 2, -1, 88 -1, -1), 89 MUX_GATE_CLR_SET_UPD(CLK_INFRA_PCIE_GFMUX_TL_O_P1_SEL, "infra_pcie_gfmux_tl_o_p1_sel", 90 infra_pcie_gfmux_tl_ck_o_p1_parents, 0x0028, 0x0020, 0x0024, 2, 2, -1, 91 -1, -1), 92 MUX_GATE_CLR_SET_UPD(CLK_INFRA_PCIE_GFMUX_TL_O_P2_SEL, "infra_pcie_gfmux_tl_o_p2_sel", 93 infra_pcie_gfmux_tl_ck_o_p2_parents, 0x0028, 0x0020, 0x0024, 4, 2, -1, 94 -1, -1), 95 MUX_GATE_CLR_SET_UPD(CLK_INFRA_PCIE_GFMUX_TL_O_P3_SEL, "infra_pcie_gfmux_tl_o_p3_sel", 96 infra_pcie_gfmux_tl_ck_o_p3_parents, 0x0028, 0x0020, 0x0024, 6, 2, -1, 97 -1, -1), 98 }; 99 100 static const struct mtk_gate_regs infra0_cg_regs = { 101 .set_ofs = 0x10, 102 .clr_ofs = 0x14, 103 .sta_ofs = 0x18, 104 }; 105 106 static const struct mtk_gate_regs infra1_cg_regs = { 107 .set_ofs = 0x40, 108 .clr_ofs = 0x44, 109 .sta_ofs = 0x48, 110 }; 111 112 static const struct mtk_gate_regs infra2_cg_regs = { 113 .set_ofs = 0x50, 114 .clr_ofs = 0x54, 115 .sta_ofs = 0x58, 116 }; 117 118 static const struct mtk_gate_regs infra3_cg_regs = { 119 .set_ofs = 0x60, 120 .clr_ofs = 0x64, 121 .sta_ofs = 0x68, 122 }; 123 124 #define GATE_INFRA0_FLAGS(_id, _name, _parent, _shift, _flags) \ 125 GATE_MTK_FLAGS(_id, _name, _parent, &infra0_cg_regs, _shift, &mtk_clk_gate_ops_setclr, \ 126 _flags) 127 128 #define GATE_INFRA1_FLAGS(_id, _name, _parent, _shift, _flags) \ 129 GATE_MTK_FLAGS(_id, _name, _parent, &infra1_cg_regs, _shift, &mtk_clk_gate_ops_setclr, \ 130 _flags) 131 132 #define GATE_INFRA2_FLAGS(_id, _name, _parent, _shift, _flags) \ 133 GATE_MTK_FLAGS(_id, _name, _parent, &infra2_cg_regs, _shift, &mtk_clk_gate_ops_setclr, \ 134 _flags) 135 136 #define GATE_INFRA3_FLAGS(_id, _name, _parent, _shift, _flags) \ 137 GATE_MTK_FLAGS(_id, _name, _parent, &infra3_cg_regs, _shift, &mtk_clk_gate_ops_setclr, \ 138 _flags) 139 140 #define GATE_INFRA0(_id, _name, _parent, _shift) GATE_INFRA0_FLAGS(_id, _name, _parent, _shift, 0) 141 142 #define GATE_INFRA1(_id, _name, _parent, _shift) GATE_INFRA1_FLAGS(_id, _name, _parent, _shift, 0) 143 144 #define GATE_INFRA2(_id, _name, _parent, _shift) GATE_INFRA2_FLAGS(_id, _name, _parent, _shift, 0) 145 146 #define GATE_INFRA3(_id, _name, _parent, _shift) GATE_INFRA3_FLAGS(_id, _name, _parent, _shift, 0) 147 148 static const struct mtk_gate infra_clks[] = { 149 /* INFRA0 */ 150 GATE_INFRA0(CLK_INFRA_PCIE_PERI_26M_CK_P0, "infra_pcie_peri_ck_26m_ck_p0", 151 "csw_infra_f26m_sel", 7), 152 GATE_INFRA0(CLK_INFRA_PCIE_PERI_26M_CK_P1, "infra_pcie_peri_ck_26m_ck_p1", 153 "csw_infra_f26m_sel", 8), 154 GATE_INFRA0(CLK_INFRA_PCIE_PERI_26M_CK_P2, "infra_pcie_peri_ck_26m_ck_p2", 155 "csw_infra_f26m_sel", 9), 156 GATE_INFRA0(CLK_INFRA_PCIE_PERI_26M_CK_P3, "infra_pcie_peri_ck_26m_ck_p3", 157 "csw_infra_f26m_sel", 10), 158 /* INFRA1 */ 159 GATE_INFRA1(CLK_INFRA_66M_GPT_BCK, "infra_hf_66m_gpt_bck", "sysaxi_sel", 0), 160 GATE_INFRA1(CLK_INFRA_66M_PWM_HCK, "infra_hf_66m_pwm_hck", "sysaxi_sel", 1), 161 GATE_INFRA1(CLK_INFRA_66M_PWM_BCK, "infra_hf_66m_pwm_bck", "infra_pwm_sel", 2), 162 GATE_INFRA1(CLK_INFRA_66M_PWM_CK1, "infra_hf_66m_pwm_ck1", "infra_pwm_ck1_sel", 3), 163 GATE_INFRA1(CLK_INFRA_66M_PWM_CK2, "infra_hf_66m_pwm_ck2", "infra_pwm_ck2_sel", 4), 164 GATE_INFRA1(CLK_INFRA_66M_PWM_CK3, "infra_hf_66m_pwm_ck3", "infra_pwm_ck3_sel", 5), 165 GATE_INFRA1(CLK_INFRA_66M_PWM_CK4, "infra_hf_66m_pwm_ck4", "infra_pwm_ck4_sel", 6), 166 GATE_INFRA1(CLK_INFRA_66M_PWM_CK5, "infra_hf_66m_pwm_ck5", "infra_pwm_ck5_sel", 7), 167 GATE_INFRA1(CLK_INFRA_66M_PWM_CK6, "infra_hf_66m_pwm_ck6", "infra_pwm_ck6_sel", 8), 168 GATE_INFRA1(CLK_INFRA_66M_PWM_CK7, "infra_hf_66m_pwm_ck7", "infra_pwm_ck7_sel", 9), 169 GATE_INFRA1(CLK_INFRA_66M_PWM_CK8, "infra_hf_66m_pwm_ck8", "infra_pwm_ck8_sel", 10), 170 GATE_INFRA1(CLK_INFRA_133M_CQDMA_BCK, "infra_hf_133m_cqdma_bck", "sysaxi_sel", 12), 171 GATE_INFRA1(CLK_INFRA_66M_AUD_SLV_BCK, "infra_66m_aud_slv_bck", "sysaxi_sel", 13), 172 GATE_INFRA1(CLK_INFRA_AUD_26M, "infra_f_faud_26m", "csw_infra_f26m_sel", 14), 173 GATE_INFRA1(CLK_INFRA_AUD_L, "infra_f_faud_l", "aud_l_sel", 15), 174 GATE_INFRA1(CLK_INFRA_AUD_AUD, "infra_f_aud_aud", "a1sys_sel", 16), 175 GATE_INFRA1(CLK_INFRA_AUD_EG2, "infra_f_faud_eg2", "a_tuner_sel", 18), 176 GATE_INFRA1_FLAGS(CLK_INFRA_DRAMC_F26M, "infra_dramc_f26m", "csw_infra_f26m_sel", 19, 177 CLK_IS_CRITICAL), 178 /* JTAG */ 179 GATE_INFRA1_FLAGS(CLK_INFRA_133M_DBG_ACKM, "infra_hf_133m_dbg_ackm", "sysaxi_sel", 20, 180 CLK_IS_CRITICAL), 181 GATE_INFRA1(CLK_INFRA_66M_AP_DMA_BCK, "infra_66m_ap_dma_bck", "sysaxi_sel", 21), 182 GATE_INFRA1(CLK_INFRA_66M_SEJ_BCK, "infra_hf_66m_sej_bck", "sysaxi_sel", 29), 183 GATE_INFRA1(CLK_INFRA_PRE_CK_SEJ_F13M, "infra_pre_ck_sej_f13m", "csw_infra_f26m_sel", 30), 184 /* INFRA2 */ 185 GATE_INFRA2(CLK_INFRA_26M_THERM_SYSTEM, "infra_hf_26m_therm_system", "csw_infra_f26m_sel", 186 0), 187 GATE_INFRA2(CLK_INFRA_I2C_BCK, "infra_i2c_bck", "i2c_sel", 1), 188 GATE_INFRA2(CLK_INFRA_52M_UART0_CK, "infra_f_52m_uart0", "infra_mux_uart0_sel", 3), 189 GATE_INFRA2(CLK_INFRA_52M_UART1_CK, "infra_f_52m_uart1", "infra_mux_uart1_sel", 4), 190 GATE_INFRA2(CLK_INFRA_52M_UART2_CK, "infra_f_52m_uart2", "infra_mux_uart2_sel", 5), 191 GATE_INFRA2(CLK_INFRA_NFI, "infra_f_fnfi", "nfi1x_sel", 9), 192 GATE_INFRA2(CLK_INFRA_SPINFI, "infra_f_fspinfi", "spinfi_sel", 10), 193 GATE_INFRA2_FLAGS(CLK_INFRA_66M_NFI_HCK, "infra_hf_66m_nfi_hck", "sysaxi_sel", 11, 194 CLK_IS_CRITICAL), 195 GATE_INFRA2_FLAGS(CLK_INFRA_104M_SPI0, "infra_hf_104m_spi0", "infra_mux_spi0_sel", 12, 196 CLK_IS_CRITICAL), 197 GATE_INFRA2(CLK_INFRA_104M_SPI1, "infra_hf_104m_spi1", "infra_mux_spi1_sel", 13), 198 GATE_INFRA2(CLK_INFRA_104M_SPI2_BCK, "infra_hf_104m_spi2_bck", "infra_mux_spi2_sel", 14), 199 GATE_INFRA2_FLAGS(CLK_INFRA_66M_SPI0_HCK, "infra_hf_66m_spi0_hck", "sysaxi_sel", 15, 200 CLK_IS_CRITICAL), 201 GATE_INFRA2(CLK_INFRA_66M_SPI1_HCK, "infra_hf_66m_spi1_hck", "sysaxi_sel", 16), 202 GATE_INFRA2(CLK_INFRA_66M_SPI2_HCK, "infra_hf_66m_spi2_hck", "sysaxi_sel", 17), 203 GATE_INFRA2(CLK_INFRA_66M_FLASHIF_AXI, "infra_hf_66m_flashif_axi", "sysaxi_sel", 18), 204 GATE_INFRA2_FLAGS(CLK_INFRA_RTC, "infra_f_frtc", "top_rtc_32k", 19, CLK_IS_CRITICAL), 205 GATE_INFRA2(CLK_INFRA_26M_ADC_BCK, "infra_f_26m_adc_bck", "csw_infra_f26m_sel", 20), 206 GATE_INFRA2(CLK_INFRA_RC_ADC, "infra_f_frc_adc", "infra_f_26m_adc_bck", 21), 207 GATE_INFRA2(CLK_INFRA_MSDC400, "infra_f_fmsdc400", "emmc_400m_sel", 22), 208 GATE_INFRA2(CLK_INFRA_MSDC2_HCK, "infra_f_fmsdc2_hck", "emmc_250m_sel", 23), 209 GATE_INFRA2(CLK_INFRA_133M_MSDC_0_HCK, "infra_hf_133m_msdc_0_hck", "sysaxi_sel", 24), 210 GATE_INFRA2(CLK_INFRA_66M_MSDC_0_HCK, "infra_66m_msdc_0_hck", "sysaxi_sel", 25), 211 GATE_INFRA2(CLK_INFRA_133M_CPUM_BCK, "infra_hf_133m_cpum_bck", "sysaxi_sel", 26), 212 GATE_INFRA2(CLK_INFRA_BIST2FPC, "infra_hf_fbist2fpc", "nfi1x_sel", 27), 213 GATE_INFRA2(CLK_INFRA_I2C_X16W_MCK_CK_P1, "infra_hf_i2c_x16w_mck_ck_p1", "sysaxi_sel", 29), 214 GATE_INFRA2(CLK_INFRA_I2C_X16W_PCK_CK_P1, "infra_hf_i2c_x16w_pck_ck_p1", "sysaxi_sel", 31), 215 /* INFRA3 */ 216 GATE_INFRA3(CLK_INFRA_133M_USB_HCK, "infra_133m_usb_hck", "sysaxi_sel", 0), 217 GATE_INFRA3(CLK_INFRA_133M_USB_HCK_CK_P1, "infra_133m_usb_hck_ck_p1", "sysaxi_sel", 1), 218 GATE_INFRA3(CLK_INFRA_66M_USB_HCK, "infra_66m_usb_hck", "sysaxi_sel", 2), 219 GATE_INFRA3(CLK_INFRA_66M_USB_HCK_CK_P1, "infra_66m_usb_hck_ck_p1", "sysaxi_sel", 3), 220 GATE_INFRA3(CLK_INFRA_USB_SYS, "infra_usb_sys", "usb_sys_sel", 4), 221 GATE_INFRA3(CLK_INFRA_USB_SYS_CK_P1, "infra_usb_sys_ck_p1", "usb_sys_p1_sel", 5), 222 GATE_INFRA3(CLK_INFRA_USB_REF, "infra_usb_ref", "top_xtal", 6), 223 GATE_INFRA3(CLK_INFRA_USB_CK_P1, "infra_usb_ck_p1", "top_xtal", 7), 224 GATE_INFRA3_FLAGS(CLK_INFRA_USB_FRMCNT, "infra_usb_frmcnt", "usb_frmcnt_sel", 8, 225 CLK_IS_CRITICAL), 226 GATE_INFRA3_FLAGS(CLK_INFRA_USB_FRMCNT_CK_P1, "infra_usb_frmcnt_ck_p1", "usb_frmcnt_p1_sel", 227 9, CLK_IS_CRITICAL), 228 GATE_INFRA3(CLK_INFRA_USB_PIPE, "infra_usb_pipe", "sspxtp_sel", 10), 229 GATE_INFRA3(CLK_INFRA_USB_PIPE_CK_P1, "infra_usb_pipe_ck_p1", "usb_phy_sel", 11), 230 GATE_INFRA3(CLK_INFRA_USB_UTMI, "infra_usb_utmi", "top_xtal", 12), 231 GATE_INFRA3(CLK_INFRA_USB_UTMI_CK_P1, "infra_usb_utmi_ck_p1", "top_xtal", 13), 232 GATE_INFRA3(CLK_INFRA_USB_XHCI, "infra_usb_xhci", "usb_xhci_sel", 14), 233 GATE_INFRA3(CLK_INFRA_USB_XHCI_CK_P1, "infra_usb_xhci_ck_p1", "usb_xhci_p1_sel", 15), 234 GATE_INFRA3(CLK_INFRA_PCIE_GFMUX_TL_P0, "infra_pcie_gfmux_tl_ck_p0", 235 "infra_pcie_gfmux_tl_o_p0_sel", 20), 236 GATE_INFRA3(CLK_INFRA_PCIE_GFMUX_TL_P1, "infra_pcie_gfmux_tl_ck_p1", 237 "infra_pcie_gfmux_tl_o_p1_sel", 21), 238 GATE_INFRA3(CLK_INFRA_PCIE_GFMUX_TL_P2, "infra_pcie_gfmux_tl_ck_p2", 239 "infra_pcie_gfmux_tl_o_p2_sel", 22), 240 GATE_INFRA3(CLK_INFRA_PCIE_GFMUX_TL_P3, "infra_pcie_gfmux_tl_ck_p3", 241 "infra_pcie_gfmux_tl_o_p3_sel", 23), 242 GATE_INFRA3(CLK_INFRA_PCIE_PIPE_P0, "infra_pcie_pipe_ck_p0", "top_xtal", 24), 243 GATE_INFRA3(CLK_INFRA_PCIE_PIPE_P1, "infra_pcie_pipe_ck_p1", "top_xtal", 25), 244 GATE_INFRA3(CLK_INFRA_PCIE_PIPE_P2, "infra_pcie_pipe_ck_p2", "top_xtal", 26), 245 GATE_INFRA3(CLK_INFRA_PCIE_PIPE_P3, "infra_pcie_pipe_ck_p3", "top_xtal", 27), 246 GATE_INFRA3(CLK_INFRA_133M_PCIE_CK_P0, "infra_133m_pcie_ck_p0", "sysaxi_sel", 28), 247 GATE_INFRA3(CLK_INFRA_133M_PCIE_CK_P1, "infra_133m_pcie_ck_p1", "sysaxi_sel", 29), 248 GATE_INFRA3(CLK_INFRA_133M_PCIE_CK_P2, "infra_133m_pcie_ck_p2", "sysaxi_sel", 30), 249 GATE_INFRA3(CLK_INFRA_133M_PCIE_CK_P3, "infra_133m_pcie_ck_p3", "sysaxi_sel", 31), 250 }; 251 252 static const struct mtk_clk_desc infra_desc = { 253 .clks = infra_clks, 254 .num_clks = ARRAY_SIZE(infra_clks), 255 .mux_clks = infra_muxes, 256 .num_mux_clks = ARRAY_SIZE(infra_muxes), 257 .clk_lock = &mt7988_clk_lock, 258 }; 259 260 static const struct of_device_id of_match_clk_mt7988_infracfg[] = { 261 { .compatible = "mediatek,mt7988-infracfg", .data = &infra_desc }, 262 { /* sentinel */ } 263 }; 264 MODULE_DEVICE_TABLE(of, of_match_clk_mt7988_infracfg); 265 266 static struct platform_driver clk_mt7988_infracfg_drv = { 267 .driver = { 268 .name = "clk-mt7988-infracfg", 269 .of_match_table = of_match_clk_mt7988_infracfg, 270 }, 271 .probe = mtk_clk_simple_probe, 272 .remove_new = mtk_clk_simple_remove, 273 }; 274 module_platform_driver(clk_mt7988_infracfg_drv); 275 MODULE_LICENSE("GPL"); 276