1 // SPDX-License-Identifier: GPL-2.0-only 2 #include <linux/clk-provider.h> 3 #include <linux/module.h> 4 #include <linux/platform_device.h> 5 #include <linux/spinlock.h> 6 7 #include <dt-bindings/clock/marvell,pxa1908.h> 8 9 #include "clk.h" 10 11 #define APBCP_UART2 0x1c 12 #define APBCP_TWSI2 0x28 13 #define APBCP_AICER 0x38 14 15 #define APBCP_NR_CLKS 4 16 17 struct pxa1908_clk_unit { 18 struct mmp_clk_unit unit; 19 void __iomem *base; 20 }; 21 22 static DEFINE_SPINLOCK(uart2_lock); 23 24 static const char * const uart_parent_names[] = {"pll1_117", "uart_pll"}; 25 26 static struct mmp_param_gate_clk apbcp_gate_clks[] = { 27 {PXA1908_CLK_UART2, "uart2_clk", "uart2_mux", CLK_SET_RATE_PARENT, APBCP_UART2, 0x7, 0x3, 0x0, 0, &uart2_lock}, 28 {PXA1908_CLK_TWSI2, "twsi2_clk", "pll1_32", CLK_SET_RATE_PARENT, APBCP_TWSI2, 0x7, 0x3, 0x0, 0, NULL}, 29 {PXA1908_CLK_AICER, "ripc_clk", NULL, 0, APBCP_AICER, 0x7, 0x2, 0x0, 0, NULL}, 30 }; 31 32 static struct mmp_param_mux_clk apbcp_mux_clks[] = { 33 {0, "uart2_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBCP_UART2, 4, 3, 0, &uart2_lock}, 34 }; 35 36 static void pxa1908_apb_p_periph_clk_init(struct pxa1908_clk_unit *pxa_unit) 37 { 38 struct mmp_clk_unit *unit = &pxa_unit->unit; 39 40 mmp_register_mux_clks(unit, apbcp_mux_clks, pxa_unit->base, 41 ARRAY_SIZE(apbcp_mux_clks)); 42 mmp_register_gate_clks(unit, apbcp_gate_clks, pxa_unit->base, 43 ARRAY_SIZE(apbcp_gate_clks)); 44 } 45 46 static int pxa1908_apbcp_probe(struct platform_device *pdev) 47 { 48 struct pxa1908_clk_unit *pxa_unit; 49 50 pxa_unit = devm_kzalloc(&pdev->dev, sizeof(*pxa_unit), GFP_KERNEL); 51 if (IS_ERR(pxa_unit)) 52 return PTR_ERR(pxa_unit); 53 54 pxa_unit->base = devm_platform_ioremap_resource(pdev, 0); 55 if (IS_ERR(pxa_unit->base)) 56 return PTR_ERR(pxa_unit->base); 57 58 mmp_clk_init(pdev->dev.of_node, &pxa_unit->unit, APBCP_NR_CLKS); 59 60 pxa1908_apb_p_periph_clk_init(pxa_unit); 61 62 return 0; 63 } 64 65 static const struct of_device_id pxa1908_apbcp_match_table[] = { 66 { .compatible = "marvell,pxa1908-apbcp" }, 67 { } 68 }; 69 MODULE_DEVICE_TABLE(of, pxa1908_apbcp_match_table); 70 71 static struct platform_driver pxa1908_apbcp_driver = { 72 .probe = pxa1908_apbcp_probe, 73 .driver = { 74 .name = "pxa1908-apbcp", 75 .of_match_table = pxa1908_apbcp_match_table 76 } 77 }; 78 module_platform_driver(pxa1908_apbcp_driver); 79 80 MODULE_AUTHOR("Duje Mihanović <duje.mihanovic@skole.hr>"); 81 MODULE_DESCRIPTION("Marvell PXA1908 APBCP Clock Driver"); 82 MODULE_LICENSE("GPL"); 83